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@@ -1,1293 +1,1293 @@
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-/*
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- * Public Key layer for parsing key files and structures
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- *
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- * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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- * SPDX-License-Identifier: Apache-2.0
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- *
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- * Licensed under the Apache License, Version 2.0 (the "License"); you may
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- * not use this file except in compliance with the License.
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- * You may obtain a copy of the License at
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- *
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- * http://www.apache.org/licenses/LICENSE-2.0
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- *
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- * Unless required by applicable law or agreed to in writing, software
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- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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- * See the License for the specific language governing permissions and
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- * limitations under the License.
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- *
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- * This file is part of mbed TLS (https://tls.mbed.org)
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- */
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-
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-#if !defined(MBEDTLS_CONFIG_FILE)
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-#include "mbedtls/config.h"
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-#else
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-#include MBEDTLS_CONFIG_FILE
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-#endif
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-
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-#if defined(MBEDTLS_PK_PARSE_C)
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-
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-#include "mbedtls/pk.h"
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-#include "mbedtls/asn1.h"
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-#include "mbedtls/oid.h"
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-
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-#include <string.h>
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-
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-#if defined(MBEDTLS_RSA_C)
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-#include "mbedtls/rsa.h"
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-#endif
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-#if defined(MBEDTLS_ECP_C)
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-#include "mbedtls/ecp.h"
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-#endif
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-#if defined(MBEDTLS_ECDSA_C)
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-#include "mbedtls/ecdsa.h"
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-#endif
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-#if defined(MBEDTLS_PEM_PARSE_C)
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-#include "mbedtls/pem.h"
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-#endif
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-#if defined(MBEDTLS_PKCS5_C)
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-#include "mbedtls/pkcs5.h"
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-#endif
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-#if defined(MBEDTLS_PKCS12_C)
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-#include "mbedtls/pkcs12.h"
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-#endif
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-
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-#if defined(MBEDTLS_PLATFORM_C)
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-#include "mbedtls/platform.h"
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-#else
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-#include <stdlib.h>
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-#define mbedtls_calloc calloc
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-#define mbedtls_free free
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-#endif
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-
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-#if defined(MBEDTLS_FS_IO)
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-/* Implementation that should never be optimized out by the compiler */
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-static void mbedtls_zeroize( void *v, size_t n ) {
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- volatile unsigned char *p = v; while( n-- ) *p++ = 0;
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-}
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-
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-/*
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- * Load all data from a file into a given buffer.
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- *
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- * The file is expected to contain either PEM or DER encoded data.
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- * A terminating null byte is always appended. It is included in the announced
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- * length only if the data looks like it is PEM encoded.
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- */
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-int mbedtls_pk_load_file( const char *path, unsigned char **buf, size_t *n )
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-{
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- FILE *f;
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- long size;
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-
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- if( ( f = fopen( path, "rb" ) ) == NULL )
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- return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
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-
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- fseek( f, 0, SEEK_END );
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- if( ( size = ftell( f ) ) == -1 )
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- {
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- fclose( f );
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- return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
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- }
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- fseek( f, 0, SEEK_SET );
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-
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- *n = (size_t) size;
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-
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- if( *n + 1 == 0 ||
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- ( *buf = mbedtls_calloc( 1, *n + 1 ) ) == NULL )
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- {
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- fclose( f );
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- return( MBEDTLS_ERR_PK_ALLOC_FAILED );
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- }
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-
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- if( fread( *buf, 1, *n, f ) != *n )
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- {
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- fclose( f );
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- mbedtls_free( *buf );
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- return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
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- }
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-
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- fclose( f );
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-
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- (*buf)[*n] = '\0';
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-
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- if( strstr( (const char *) *buf, "-----BEGIN " ) != NULL )
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- ++*n;
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-
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- return( 0 );
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-}
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-
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-/*
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- * Load and parse a private key
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- */
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-int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
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- const char *path, const char *pwd )
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-{
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- int ret;
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- size_t n;
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- unsigned char *buf;
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-
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- if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
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- return( ret );
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-
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- if( pwd == NULL )
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- ret = mbedtls_pk_parse_key( ctx, buf, n, NULL, 0 );
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- else
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- ret = mbedtls_pk_parse_key( ctx, buf, n,
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- (const unsigned char *) pwd, strlen( pwd ) );
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-
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- mbedtls_zeroize( buf, n );
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- mbedtls_free( buf );
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-
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- return( ret );
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-}
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-
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-/*
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- * Load and parse a public key
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- */
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-int mbedtls_pk_parse_public_keyfile( mbedtls_pk_context *ctx, const char *path )
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-{
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- int ret;
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- size_t n;
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- unsigned char *buf;
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-
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- if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
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- return( ret );
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-
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- ret = mbedtls_pk_parse_public_key( ctx, buf, n );
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-
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- mbedtls_zeroize( buf, n );
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- mbedtls_free( buf );
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-
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- return( ret );
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-}
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-#endif /* MBEDTLS_FS_IO */
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-
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-#if defined(MBEDTLS_ECP_C)
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-/* Minimally parse an ECParameters buffer to and mbedtls_asn1_buf
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- *
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- * ECParameters ::= CHOICE {
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- * namedCurve OBJECT IDENTIFIER
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- * specifiedCurve SpecifiedECDomain -- = SEQUENCE { ... }
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- * -- implicitCurve NULL
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- * }
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- */
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-static int pk_get_ecparams( unsigned char **p, const unsigned char *end,
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- mbedtls_asn1_buf *params )
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-{
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- int ret;
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-
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- /* Tag may be either OID or SEQUENCE */
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- params->tag = **p;
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- if( params->tag != MBEDTLS_ASN1_OID
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-#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
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- && params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE )
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-#endif
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- )
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- {
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
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- MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
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- }
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-
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- if( ( ret = mbedtls_asn1_get_tag( p, end, ¶ms->len, params->tag ) ) != 0 )
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- {
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
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- }
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-
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- params->p = *p;
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- *p += params->len;
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-
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- if( *p != end )
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
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- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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-
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- return( 0 );
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-}
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-
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-#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
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-/*
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- * Parse a SpecifiedECDomain (SEC 1 C.2) and (mostly) fill the group with it.
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- * WARNING: the resulting group should only be used with
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- * pk_group_id_from_specified(), since its base point may not be set correctly
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- * if it was encoded compressed.
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- *
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- * SpecifiedECDomain ::= SEQUENCE {
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- * version SpecifiedECDomainVersion(ecdpVer1 | ecdpVer2 | ecdpVer3, ...),
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- * fieldID FieldID {{FieldTypes}},
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- * curve Curve,
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- * base ECPoint,
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- * order INTEGER,
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- * cofactor INTEGER OPTIONAL,
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- * hash HashAlgorithm OPTIONAL,
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- * ...
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- * }
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- *
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- * We only support prime-field as field type, and ignore hash and cofactor.
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- */
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-static int pk_group_from_specified( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
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-{
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- int ret;
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- unsigned char *p = params->p;
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- const unsigned char * const end = params->p + params->len;
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- const unsigned char *end_field, *end_curve;
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- size_t len;
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- int ver;
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-
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- /* SpecifiedECDomainVersion ::= INTEGER { 1, 2, 3 } */
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- if( ( ret = mbedtls_asn1_get_int( &p, end, &ver ) ) != 0 )
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
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-
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- if( ver < 1 || ver > 3 )
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
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-
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- /*
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- * FieldID { FIELD-ID:IOSet } ::= SEQUENCE { -- Finite field
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- * fieldType FIELD-ID.&id({IOSet}),
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- * parameters FIELD-ID.&Type({IOSet}{@fieldType})
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- * }
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- */
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- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
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- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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- return( ret );
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-
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- end_field = p + len;
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-
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- /*
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- * FIELD-ID ::= TYPE-IDENTIFIER
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- * FieldTypes FIELD-ID ::= {
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- * { Prime-p IDENTIFIED BY prime-field } |
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- * { Characteristic-two IDENTIFIED BY characteristic-two-field }
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- * }
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- * prime-field OBJECT IDENTIFIER ::= { id-fieldType 1 }
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- */
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- if( ( ret = mbedtls_asn1_get_tag( &p, end_field, &len, MBEDTLS_ASN1_OID ) ) != 0 )
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- return( ret );
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-
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- if( len != MBEDTLS_OID_SIZE( MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD ) ||
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- memcmp( p, MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD, len ) != 0 )
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- {
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- return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
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- }
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-
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- p += len;
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-
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- /* Prime-p ::= INTEGER -- Field of size p. */
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- if( ( ret = mbedtls_asn1_get_mpi( &p, end_field, &grp->P ) ) != 0 )
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
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-
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- grp->pbits = mbedtls_mpi_bitlen( &grp->P );
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-
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- if( p != end_field )
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
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- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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-
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- /*
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- * Curve ::= SEQUENCE {
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- * a FieldElement,
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- * b FieldElement,
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- * seed BIT STRING OPTIONAL
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- * -- Shall be present if used in SpecifiedECDomain
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- * -- with version equal to ecdpVer2 or ecdpVer3
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- * }
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- */
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- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
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- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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- return( ret );
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-
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- end_curve = p + len;
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-
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- /*
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- * FieldElement ::= OCTET STRING
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- * containing an integer in the case of a prime field
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- */
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- if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
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- ( ret = mbedtls_mpi_read_binary( &grp->A, p, len ) ) != 0 )
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- {
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
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- }
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-
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- p += len;
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-
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- if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
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- ( ret = mbedtls_mpi_read_binary( &grp->B, p, len ) ) != 0 )
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- {
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
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- }
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-
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- p += len;
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-
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- /* Ignore seed BIT STRING OPTIONAL */
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- if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_BIT_STRING ) ) == 0 )
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- p += len;
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-
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- if( p != end_curve )
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
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- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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-
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- /*
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- * ECPoint ::= OCTET STRING
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- */
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- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
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-
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- if( ( ret = mbedtls_ecp_point_read_binary( grp, &grp->G,
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- ( const unsigned char *) p, len ) ) != 0 )
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- {
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- /*
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- * If we can't read the point because it's compressed, cheat by
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- * reading only the X coordinate and the parity bit of Y.
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- */
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- if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE ||
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- ( p[0] != 0x02 && p[0] != 0x03 ) ||
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- len != mbedtls_mpi_size( &grp->P ) + 1 ||
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- mbedtls_mpi_read_binary( &grp->G.X, p + 1, len - 1 ) != 0 ||
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- mbedtls_mpi_lset( &grp->G.Y, p[0] - 2 ) != 0 ||
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- mbedtls_mpi_lset( &grp->G.Z, 1 ) != 0 )
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- {
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
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- }
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- }
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-
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- p += len;
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-
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- /*
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- * order INTEGER
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- */
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- if( ( ret = mbedtls_asn1_get_mpi( &p, end, &grp->N ) ) != 0 )
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- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
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-
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- grp->nbits = mbedtls_mpi_bitlen( &grp->N );
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-
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- /*
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- * Allow optional elements by purposefully not enforcing p == end here.
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- */
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-
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- return( 0 );
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-}
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-
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-/*
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- * Find the group id associated with an (almost filled) group as generated by
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- * pk_group_from_specified(), or return an error if unknown.
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- */
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-static int pk_group_id_from_group( const mbedtls_ecp_group *grp, mbedtls_ecp_group_id *grp_id )
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-{
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- int ret = 0;
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- mbedtls_ecp_group ref;
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- const mbedtls_ecp_group_id *id;
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-
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- mbedtls_ecp_group_init( &ref );
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-
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- for( id = mbedtls_ecp_grp_id_list(); *id != MBEDTLS_ECP_DP_NONE; id++ )
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- {
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- /* Load the group associated to that id */
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- mbedtls_ecp_group_free( &ref );
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- MBEDTLS_MPI_CHK( mbedtls_ecp_group_load( &ref, *id ) );
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-
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- /* Compare to the group we were given, starting with easy tests */
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- if( grp->pbits == ref.pbits && grp->nbits == ref.nbits &&
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- mbedtls_mpi_cmp_mpi( &grp->P, &ref.P ) == 0 &&
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- mbedtls_mpi_cmp_mpi( &grp->A, &ref.A ) == 0 &&
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- mbedtls_mpi_cmp_mpi( &grp->B, &ref.B ) == 0 &&
|
|
|
- mbedtls_mpi_cmp_mpi( &grp->N, &ref.N ) == 0 &&
|
|
|
- mbedtls_mpi_cmp_mpi( &grp->G.X, &ref.G.X ) == 0 &&
|
|
|
- mbedtls_mpi_cmp_mpi( &grp->G.Z, &ref.G.Z ) == 0 &&
|
|
|
- /* For Y we may only know the parity bit, so compare only that */
|
|
|
- mbedtls_mpi_get_bit( &grp->G.Y, 0 ) == mbedtls_mpi_get_bit( &ref.G.Y, 0 ) )
|
|
|
- {
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
-cleanup:
|
|
|
- mbedtls_ecp_group_free( &ref );
|
|
|
-
|
|
|
- *grp_id = *id;
|
|
|
-
|
|
|
- if( ret == 0 && *id == MBEDTLS_ECP_DP_NONE )
|
|
|
- ret = MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
|
|
|
-
|
|
|
- return( ret );
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Parse a SpecifiedECDomain (SEC 1 C.2) and find the associated group ID
|
|
|
- */
|
|
|
-static int pk_group_id_from_specified( const mbedtls_asn1_buf *params,
|
|
|
- mbedtls_ecp_group_id *grp_id )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- mbedtls_ecp_group grp;
|
|
|
-
|
|
|
- mbedtls_ecp_group_init( &grp );
|
|
|
-
|
|
|
- if( ( ret = pk_group_from_specified( params, &grp ) ) != 0 )
|
|
|
- goto cleanup;
|
|
|
-
|
|
|
- ret = pk_group_id_from_group( &grp, grp_id );
|
|
|
-
|
|
|
-cleanup:
|
|
|
- mbedtls_ecp_group_free( &grp );
|
|
|
-
|
|
|
- return( ret );
|
|
|
-}
|
|
|
-#endif /* MBEDTLS_PK_PARSE_EC_EXTENDED */
|
|
|
-
|
|
|
-/*
|
|
|
- * Use EC parameters to initialise an EC group
|
|
|
- *
|
|
|
- * ECParameters ::= CHOICE {
|
|
|
- * namedCurve OBJECT IDENTIFIER
|
|
|
- * specifiedCurve SpecifiedECDomain -- = SEQUENCE { ... }
|
|
|
- * -- implicitCurve NULL
|
|
|
- */
|
|
|
-static int pk_use_ecparams( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- mbedtls_ecp_group_id grp_id;
|
|
|
-
|
|
|
- if( params->tag == MBEDTLS_ASN1_OID )
|
|
|
- {
|
|
|
- if( mbedtls_oid_get_ec_grp( params, &grp_id ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
-#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
|
|
|
- if( ( ret = pk_group_id_from_specified( params, &grp_id ) ) != 0 )
|
|
|
- return( ret );
|
|
|
-#else
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
-#endif
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * grp may already be initilialized; if so, make sure IDs match
|
|
|
- */
|
|
|
- if( grp->id != MBEDTLS_ECP_DP_NONE && grp->id != grp_id )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_ecp_group_load( grp, grp_id ) ) != 0 )
|
|
|
- return( ret );
|
|
|
-
|
|
|
- return( 0 );
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * EC public key is an EC point
|
|
|
- *
|
|
|
- * The caller is responsible for clearing the structure upon failure if
|
|
|
- * desired. Take care to pass along the possible ECP_FEATURE_UNAVAILABLE
|
|
|
- * return code of mbedtls_ecp_point_read_binary() and leave p in a usable state.
|
|
|
- */
|
|
|
-static int pk_get_ecpubkey( unsigned char **p, const unsigned char *end,
|
|
|
- mbedtls_ecp_keypair *key )
|
|
|
-{
|
|
|
- int ret;
|
|
|
-
|
|
|
- if( ( ret = mbedtls_ecp_point_read_binary( &key->grp, &key->Q,
|
|
|
- (const unsigned char *) *p, end - *p ) ) == 0 )
|
|
|
- {
|
|
|
- ret = mbedtls_ecp_check_pubkey( &key->grp, &key->Q );
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * We know mbedtls_ecp_point_read_binary consumed all bytes or failed
|
|
|
- */
|
|
|
- *p = (unsigned char *) end;
|
|
|
-
|
|
|
- return( ret );
|
|
|
-}
|
|
|
-#endif /* MBEDTLS_ECP_C */
|
|
|
-
|
|
|
-#if defined(MBEDTLS_RSA_C)
|
|
|
-/*
|
|
|
- * RSAPublicKey ::= SEQUENCE {
|
|
|
- * modulus INTEGER, -- n
|
|
|
- * publicExponent INTEGER -- e
|
|
|
- * }
|
|
|
- */
|
|
|
-static int pk_get_rsapubkey( unsigned char **p,
|
|
|
- const unsigned char *end,
|
|
|
- mbedtls_rsa_context *rsa )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- size_t len;
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
|
|
|
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
|
|
|
-
|
|
|
- if( *p + len != end )
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
|
|
|
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_mpi( p, end, &rsa->N ) ) != 0 ||
|
|
|
- ( ret = mbedtls_asn1_get_mpi( p, end, &rsa->E ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
|
|
|
-
|
|
|
- if( *p != end )
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
|
|
|
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_rsa_check_pubkey( rsa ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY );
|
|
|
-
|
|
|
- rsa->len = mbedtls_mpi_size( &rsa->N );
|
|
|
-
|
|
|
- return( 0 );
|
|
|
-}
|
|
|
-#endif /* MBEDTLS_RSA_C */
|
|
|
-
|
|
|
-/* Get a PK algorithm identifier
|
|
|
- *
|
|
|
- * AlgorithmIdentifier ::= SEQUENCE {
|
|
|
- * algorithm OBJECT IDENTIFIER,
|
|
|
- * parameters ANY DEFINED BY algorithm OPTIONAL }
|
|
|
- */
|
|
|
-static int pk_get_pk_alg( unsigned char **p,
|
|
|
- const unsigned char *end,
|
|
|
- mbedtls_pk_type_t *pk_alg, mbedtls_asn1_buf *params )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- mbedtls_asn1_buf alg_oid;
|
|
|
-
|
|
|
- memset( params, 0, sizeof(mbedtls_asn1_buf) );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_alg( p, end, &alg_oid, params ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_ALG + ret );
|
|
|
-
|
|
|
- if( mbedtls_oid_get_pk_alg( &alg_oid, pk_alg ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
-
|
|
|
- /*
|
|
|
- * No parameters with RSA (only for EC)
|
|
|
- */
|
|
|
- if( *pk_alg == MBEDTLS_PK_RSA &&
|
|
|
- ( ( params->tag != MBEDTLS_ASN1_NULL && params->tag != 0 ) ||
|
|
|
- params->len != 0 ) )
|
|
|
- {
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_ALG );
|
|
|
- }
|
|
|
-
|
|
|
- return( 0 );
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * SubjectPublicKeyInfo ::= SEQUENCE {
|
|
|
- * algorithm AlgorithmIdentifier,
|
|
|
- * subjectPublicKey BIT STRING }
|
|
|
- */
|
|
|
-int mbedtls_pk_parse_subpubkey( unsigned char **p, const unsigned char *end,
|
|
|
- mbedtls_pk_context *pk )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- size_t len;
|
|
|
- mbedtls_asn1_buf alg_params;
|
|
|
- mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
|
|
|
- const mbedtls_pk_info_t *pk_info;
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
|
|
|
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
- {
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- end = *p + len;
|
|
|
-
|
|
|
- if( ( ret = pk_get_pk_alg( p, end, &pk_alg, &alg_params ) ) != 0 )
|
|
|
- return( ret );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_bitstring_null( p, end, &len ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
|
|
|
-
|
|
|
- if( *p + len != end )
|
|
|
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
|
|
|
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
-
|
|
|
- if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
|
|
|
- return( ret );
|
|
|
-
|
|
|
-#if defined(MBEDTLS_RSA_C)
|
|
|
- if( pk_alg == MBEDTLS_PK_RSA )
|
|
|
- {
|
|
|
- ret = pk_get_rsapubkey( p, end, mbedtls_pk_rsa( *pk ) );
|
|
|
- } else
|
|
|
-#endif /* MBEDTLS_RSA_C */
|
|
|
-#if defined(MBEDTLS_ECP_C)
|
|
|
- if( pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY )
|
|
|
- {
|
|
|
- ret = pk_use_ecparams( &alg_params, &mbedtls_pk_ec( *pk )->grp );
|
|
|
- if( ret == 0 )
|
|
|
- ret = pk_get_ecpubkey( p, end, mbedtls_pk_ec( *pk ) );
|
|
|
- } else
|
|
|
-#endif /* MBEDTLS_ECP_C */
|
|
|
- ret = MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
|
|
|
-
|
|
|
- if( ret == 0 && *p != end )
|
|
|
- ret = MBEDTLS_ERR_PK_INVALID_PUBKEY
|
|
|
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
|
|
|
-
|
|
|
- if( ret != 0 )
|
|
|
- mbedtls_pk_free( pk );
|
|
|
-
|
|
|
- return( ret );
|
|
|
-}
|
|
|
-
|
|
|
-#if defined(MBEDTLS_RSA_C)
|
|
|
-/*
|
|
|
- * Parse a PKCS#1 encoded private RSA key
|
|
|
- */
|
|
|
-static int pk_parse_key_pkcs1_der( mbedtls_rsa_context *rsa,
|
|
|
- const unsigned char *key,
|
|
|
- size_t keylen )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- size_t len;
|
|
|
- unsigned char *p, *end;
|
|
|
-
|
|
|
- p = (unsigned char *) key;
|
|
|
- end = p + keylen;
|
|
|
-
|
|
|
- /*
|
|
|
- * This function parses the RSAPrivateKey (PKCS#1)
|
|
|
- *
|
|
|
- * RSAPrivateKey ::= SEQUENCE {
|
|
|
- * version Version,
|
|
|
- * modulus INTEGER, -- n
|
|
|
- * publicExponent INTEGER, -- e
|
|
|
- * privateExponent INTEGER, -- d
|
|
|
- * prime1 INTEGER, -- p
|
|
|
- * prime2 INTEGER, -- q
|
|
|
- * exponent1 INTEGER, -- d mod (p-1)
|
|
|
- * exponent2 INTEGER, -- d mod (q-1)
|
|
|
- * coefficient INTEGER, -- (inverse of q) mod p
|
|
|
- * otherPrimeInfos OtherPrimeInfos OPTIONAL
|
|
|
- * }
|
|
|
- */
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
- {
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- end = p + len;
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_int( &p, end, &rsa->ver ) ) != 0 )
|
|
|
- {
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- if( rsa->ver != 0 )
|
|
|
- {
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
|
|
|
- }
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->N ) ) != 0 ||
|
|
|
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->E ) ) != 0 ||
|
|
|
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->D ) ) != 0 ||
|
|
|
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->P ) ) != 0 ||
|
|
|
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->Q ) ) != 0 ||
|
|
|
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->DP ) ) != 0 ||
|
|
|
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->DQ ) ) != 0 ||
|
|
|
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->QP ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_rsa_free( rsa );
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- rsa->len = mbedtls_mpi_size( &rsa->N );
|
|
|
-
|
|
|
- if( p != end )
|
|
|
- {
|
|
|
- mbedtls_rsa_free( rsa );
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
- }
|
|
|
-
|
|
|
- if( ( ret = mbedtls_rsa_check_privkey( rsa ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_rsa_free( rsa );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
-
|
|
|
- return( 0 );
|
|
|
-}
|
|
|
-#endif /* MBEDTLS_RSA_C */
|
|
|
-
|
|
|
-#if defined(MBEDTLS_ECP_C)
|
|
|
-/*
|
|
|
- * Parse a SEC1 encoded private EC key
|
|
|
- */
|
|
|
-static int pk_parse_key_sec1_der( mbedtls_ecp_keypair *eck,
|
|
|
- const unsigned char *key,
|
|
|
- size_t keylen )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- int version, pubkey_done;
|
|
|
- size_t len;
|
|
|
- mbedtls_asn1_buf params;
|
|
|
- unsigned char *p = (unsigned char *) key;
|
|
|
- unsigned char *end = p + keylen;
|
|
|
- unsigned char *end2;
|
|
|
-
|
|
|
- /*
|
|
|
- * RFC 5915, or SEC1 Appendix C.4
|
|
|
- *
|
|
|
- * ECPrivateKey ::= SEQUENCE {
|
|
|
- * version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
|
|
|
- * privateKey OCTET STRING,
|
|
|
- * parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
|
|
|
- * publicKey [1] BIT STRING OPTIONAL
|
|
|
- * }
|
|
|
- */
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
- {
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- end = p + len;
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
-
|
|
|
- if( version != 1 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_mpi_read_binary( &eck->d, p, len ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_ecp_keypair_free( eck );
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- p += len;
|
|
|
-
|
|
|
- pubkey_done = 0;
|
|
|
- if( p != end )
|
|
|
- {
|
|
|
- /*
|
|
|
- * Is 'parameters' present?
|
|
|
- */
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
- MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) == 0 )
|
|
|
- {
|
|
|
- if( ( ret = pk_get_ecparams( &p, p + len, ¶ms) ) != 0 ||
|
|
|
- ( ret = pk_use_ecparams( ¶ms, &eck->grp ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_ecp_keypair_free( eck );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
- }
|
|
|
- else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
|
|
|
- {
|
|
|
- mbedtls_ecp_keypair_free( eck );
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * Is 'publickey' present? If not, or if we can't read it (eg because it
|
|
|
- * is compressed), create it from the private key.
|
|
|
- */
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
- MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ) == 0 )
|
|
|
- {
|
|
|
- end2 = p + len;
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_bitstring_null( &p, end2, &len ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
-
|
|
|
- if( p + len != end2 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
-
|
|
|
- if( ( ret = pk_get_ecpubkey( &p, end2, eck ) ) == 0 )
|
|
|
- pubkey_done = 1;
|
|
|
- else
|
|
|
- {
|
|
|
- /*
|
|
|
- * The only acceptable failure mode of pk_get_ecpubkey() above
|
|
|
- * is if the point format is not recognized.
|
|
|
- */
|
|
|
- if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
- }
|
|
|
- }
|
|
|
- else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
|
|
|
- {
|
|
|
- mbedtls_ecp_keypair_free( eck );
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if( ! pubkey_done &&
|
|
|
- ( ret = mbedtls_ecp_mul( &eck->grp, &eck->Q, &eck->d, &eck->grp.G,
|
|
|
- NULL, NULL ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_ecp_keypair_free( eck );
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- if( ( ret = mbedtls_ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_ecp_keypair_free( eck );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
-
|
|
|
- return( 0 );
|
|
|
-}
|
|
|
-#endif /* MBEDTLS_ECP_C */
|
|
|
-
|
|
|
-/*
|
|
|
- * Parse an unencrypted PKCS#8 encoded private key
|
|
|
- */
|
|
|
-static int pk_parse_key_pkcs8_unencrypted_der(
|
|
|
- mbedtls_pk_context *pk,
|
|
|
- const unsigned char* key,
|
|
|
- size_t keylen )
|
|
|
-{
|
|
|
- int ret, version;
|
|
|
- size_t len;
|
|
|
- mbedtls_asn1_buf params;
|
|
|
- unsigned char *p = (unsigned char *) key;
|
|
|
- unsigned char *end = p + keylen;
|
|
|
- mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
|
|
|
- const mbedtls_pk_info_t *pk_info;
|
|
|
-
|
|
|
- /*
|
|
|
- * This function parses the PrivatKeyInfo object (PKCS#8 v1.2 = RFC 5208)
|
|
|
- *
|
|
|
- * PrivateKeyInfo ::= SEQUENCE {
|
|
|
- * version Version,
|
|
|
- * privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
|
|
|
- * privateKey PrivateKey,
|
|
|
- * attributes [0] IMPLICIT Attributes OPTIONAL }
|
|
|
- *
|
|
|
- * Version ::= INTEGER
|
|
|
- * PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
|
|
|
- * PrivateKey ::= OCTET STRING
|
|
|
- *
|
|
|
- * The PrivateKey OCTET STRING is a SEC1 ECPrivateKey
|
|
|
- */
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
- {
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- end = p + len;
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
-
|
|
|
- if( version != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION + ret );
|
|
|
-
|
|
|
- if( ( ret = pk_get_pk_alg( &p, end, &pk_alg, ¶ms ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
-
|
|
|
- if( len < 1 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
- MBEDTLS_ERR_ASN1_OUT_OF_DATA );
|
|
|
-
|
|
|
- if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
|
|
|
- return( ret );
|
|
|
-
|
|
|
-#if defined(MBEDTLS_RSA_C)
|
|
|
- if( pk_alg == MBEDTLS_PK_RSA )
|
|
|
- {
|
|
|
- if( ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), p, len ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_pk_free( pk );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
- } else
|
|
|
-#endif /* MBEDTLS_RSA_C */
|
|
|
-#if defined(MBEDTLS_ECP_C)
|
|
|
- if( pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH )
|
|
|
- {
|
|
|
- if( ( ret = pk_use_ecparams( ¶ms, &mbedtls_pk_ec( *pk )->grp ) ) != 0 ||
|
|
|
- ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), p, len ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_pk_free( pk );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
- } else
|
|
|
-#endif /* MBEDTLS_ECP_C */
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
-
|
|
|
- return( 0 );
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Parse an encrypted PKCS#8 encoded private key
|
|
|
- */
|
|
|
-#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
|
|
|
-static int pk_parse_key_pkcs8_encrypted_der(
|
|
|
- mbedtls_pk_context *pk,
|
|
|
- const unsigned char *key, size_t keylen,
|
|
|
- const unsigned char *pwd, size_t pwdlen )
|
|
|
-{
|
|
|
- int ret, decrypted = 0;
|
|
|
- size_t len;
|
|
|
- unsigned char buf[2048];
|
|
|
- unsigned char *p, *end;
|
|
|
- mbedtls_asn1_buf pbe_alg_oid, pbe_params;
|
|
|
-#if defined(MBEDTLS_PKCS12_C)
|
|
|
- mbedtls_cipher_type_t cipher_alg;
|
|
|
- mbedtls_md_type_t md_alg;
|
|
|
-#endif
|
|
|
-
|
|
|
- memset( buf, 0, sizeof( buf ) );
|
|
|
-
|
|
|
- p = (unsigned char *) key;
|
|
|
- end = p + keylen;
|
|
|
-
|
|
|
- if( pwdlen == 0 )
|
|
|
- return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
|
|
|
-
|
|
|
- /*
|
|
|
- * This function parses the EncryptedPrivatKeyInfo object (PKCS#8)
|
|
|
- *
|
|
|
- * EncryptedPrivateKeyInfo ::= SEQUENCE {
|
|
|
- * encryptionAlgorithm EncryptionAlgorithmIdentifier,
|
|
|
- * encryptedData EncryptedData
|
|
|
- * }
|
|
|
- *
|
|
|
- * EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
|
|
|
- *
|
|
|
- * EncryptedData ::= OCTET STRING
|
|
|
- *
|
|
|
- * The EncryptedData OCTET STRING is a PKCS#8 PrivateKeyInfo
|
|
|
- */
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
- {
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
- }
|
|
|
-
|
|
|
- end = p + len;
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_alg( &p, end, &pbe_alg_oid, &pbe_params ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
-
|
|
|
- if( len > sizeof( buf ) )
|
|
|
- return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
-
|
|
|
- /*
|
|
|
- * Decrypt EncryptedData with appropriate PDE
|
|
|
- */
|
|
|
-#if defined(MBEDTLS_PKCS12_C)
|
|
|
- if( mbedtls_oid_get_pkcs12_pbe_alg( &pbe_alg_oid, &md_alg, &cipher_alg ) == 0 )
|
|
|
- {
|
|
|
- if( ( ret = mbedtls_pkcs12_pbe( &pbe_params, MBEDTLS_PKCS12_PBE_DECRYPT,
|
|
|
- cipher_alg, md_alg,
|
|
|
- pwd, pwdlen, p, len, buf ) ) != 0 )
|
|
|
- {
|
|
|
- if( ret == MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH )
|
|
|
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
-
|
|
|
- return( ret );
|
|
|
- }
|
|
|
-
|
|
|
- decrypted = 1;
|
|
|
- }
|
|
|
- else if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_128, &pbe_alg_oid ) == 0 )
|
|
|
- {
|
|
|
- if( ( ret = mbedtls_pkcs12_pbe_sha1_rc4_128( &pbe_params,
|
|
|
- MBEDTLS_PKCS12_PBE_DECRYPT,
|
|
|
- pwd, pwdlen,
|
|
|
- p, len, buf ) ) != 0 )
|
|
|
- {
|
|
|
- return( ret );
|
|
|
- }
|
|
|
-
|
|
|
- // Best guess for password mismatch when using RC4. If first tag is
|
|
|
- // not MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE
|
|
|
- //
|
|
|
- if( *buf != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
|
|
|
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
-
|
|
|
- decrypted = 1;
|
|
|
- }
|
|
|
- else
|
|
|
-#endif /* MBEDTLS_PKCS12_C */
|
|
|
-#if defined(MBEDTLS_PKCS5_C)
|
|
|
- if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS5_PBES2, &pbe_alg_oid ) == 0 )
|
|
|
- {
|
|
|
- if( ( ret = mbedtls_pkcs5_pbes2( &pbe_params, MBEDTLS_PKCS5_DECRYPT, pwd, pwdlen,
|
|
|
- p, len, buf ) ) != 0 )
|
|
|
- {
|
|
|
- if( ret == MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH )
|
|
|
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
-
|
|
|
- return( ret );
|
|
|
- }
|
|
|
-
|
|
|
- decrypted = 1;
|
|
|
- }
|
|
|
- else
|
|
|
-#endif /* MBEDTLS_PKCS5_C */
|
|
|
- {
|
|
|
- ((void) pwd);
|
|
|
- }
|
|
|
-
|
|
|
- if( decrypted == 0 )
|
|
|
- return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
|
|
|
-
|
|
|
- return( pk_parse_key_pkcs8_unencrypted_der( pk, buf, len ) );
|
|
|
-}
|
|
|
-#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
|
|
|
-
|
|
|
-/*
|
|
|
- * Parse a private key
|
|
|
- */
|
|
|
-int mbedtls_pk_parse_key( mbedtls_pk_context *pk,
|
|
|
- const unsigned char *key, size_t keylen,
|
|
|
- const unsigned char *pwd, size_t pwdlen )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- const mbedtls_pk_info_t *pk_info;
|
|
|
-
|
|
|
-#if defined(MBEDTLS_PEM_PARSE_C)
|
|
|
- size_t len;
|
|
|
- mbedtls_pem_context pem;
|
|
|
-
|
|
|
- mbedtls_pem_init( &pem );
|
|
|
-
|
|
|
-#if defined(MBEDTLS_RSA_C)
|
|
|
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
- if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
- else
|
|
|
- ret = mbedtls_pem_read_buffer( &pem,
|
|
|
- "-----BEGIN RSA PRIVATE KEY-----",
|
|
|
- "-----END RSA PRIVATE KEY-----",
|
|
|
- key, pwd, pwdlen, &len );
|
|
|
-
|
|
|
- if( ret == 0 )
|
|
|
- {
|
|
|
- if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
|
|
|
- ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ),
|
|
|
- pem.buf, pem.buflen ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_pk_free( pk );
|
|
|
- }
|
|
|
-
|
|
|
- mbedtls_pem_free( &pem );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
- else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
|
|
|
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
- else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
|
|
|
- return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
|
|
|
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
- return( ret );
|
|
|
-#endif /* MBEDTLS_RSA_C */
|
|
|
-
|
|
|
-#if defined(MBEDTLS_ECP_C)
|
|
|
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
- if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
- else
|
|
|
- ret = mbedtls_pem_read_buffer( &pem,
|
|
|
- "-----BEGIN EC PRIVATE KEY-----",
|
|
|
- "-----END EC PRIVATE KEY-----",
|
|
|
- key, pwd, pwdlen, &len );
|
|
|
- if( ret == 0 )
|
|
|
- {
|
|
|
- if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
|
|
|
- ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ),
|
|
|
- pem.buf, pem.buflen ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_pk_free( pk );
|
|
|
- }
|
|
|
-
|
|
|
- mbedtls_pem_free( &pem );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
- else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
|
|
|
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
- else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
|
|
|
- return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
|
|
|
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
- return( ret );
|
|
|
-#endif /* MBEDTLS_ECP_C */
|
|
|
-
|
|
|
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
- if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
- else
|
|
|
- ret = mbedtls_pem_read_buffer( &pem,
|
|
|
- "-----BEGIN PRIVATE KEY-----",
|
|
|
- "-----END PRIVATE KEY-----",
|
|
|
- key, NULL, 0, &len );
|
|
|
- if( ret == 0 )
|
|
|
- {
|
|
|
- if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk,
|
|
|
- pem.buf, pem.buflen ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_pk_free( pk );
|
|
|
- }
|
|
|
-
|
|
|
- mbedtls_pem_free( &pem );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
- return( ret );
|
|
|
-
|
|
|
-#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
|
|
|
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
- if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
- else
|
|
|
- ret = mbedtls_pem_read_buffer( &pem,
|
|
|
- "-----BEGIN ENCRYPTED PRIVATE KEY-----",
|
|
|
- "-----END ENCRYPTED PRIVATE KEY-----",
|
|
|
- key, NULL, 0, &len );
|
|
|
- if( ret == 0 )
|
|
|
- {
|
|
|
- if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk,
|
|
|
- pem.buf, pem.buflen,
|
|
|
- pwd, pwdlen ) ) != 0 )
|
|
|
- {
|
|
|
- mbedtls_pk_free( pk );
|
|
|
- }
|
|
|
-
|
|
|
- mbedtls_pem_free( &pem );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
- return( ret );
|
|
|
-#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
|
|
|
-#else
|
|
|
- ((void) ret);
|
|
|
- ((void) pwd);
|
|
|
- ((void) pwdlen);
|
|
|
-#endif /* MBEDTLS_PEM_PARSE_C */
|
|
|
-
|
|
|
- /*
|
|
|
- * At this point we only know it's not a PEM formatted key. Could be any
|
|
|
- * of the known DER encoded private key formats
|
|
|
- *
|
|
|
- * We try the different DER format parsers to see if one passes without
|
|
|
- * error
|
|
|
- */
|
|
|
-#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
|
|
|
- if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, key, keylen,
|
|
|
- pwd, pwdlen ) ) == 0 )
|
|
|
- {
|
|
|
- return( 0 );
|
|
|
- }
|
|
|
-
|
|
|
- mbedtls_pk_free( pk );
|
|
|
-
|
|
|
- if( ret == MBEDTLS_ERR_PK_PASSWORD_MISMATCH )
|
|
|
- {
|
|
|
- return( ret );
|
|
|
- }
|
|
|
-#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
|
|
|
-
|
|
|
- if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk, key, keylen ) ) == 0 )
|
|
|
- return( 0 );
|
|
|
-
|
|
|
- mbedtls_pk_free( pk );
|
|
|
-
|
|
|
-#if defined(MBEDTLS_RSA_C)
|
|
|
- if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
|
|
|
- ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), key, keylen ) ) == 0 )
|
|
|
- {
|
|
|
- return( 0 );
|
|
|
- }
|
|
|
-
|
|
|
- mbedtls_pk_free( pk );
|
|
|
-#endif /* MBEDTLS_RSA_C */
|
|
|
-
|
|
|
-#if defined(MBEDTLS_ECP_C)
|
|
|
- if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
|
|
|
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
-
|
|
|
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
|
|
|
- ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), key, keylen ) ) == 0 )
|
|
|
- {
|
|
|
- return( 0 );
|
|
|
- }
|
|
|
-
|
|
|
- mbedtls_pk_free( pk );
|
|
|
-#endif /* MBEDTLS_ECP_C */
|
|
|
-
|
|
|
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Parse a public key
|
|
|
- */
|
|
|
-int mbedtls_pk_parse_public_key( mbedtls_pk_context *ctx,
|
|
|
- const unsigned char *key, size_t keylen )
|
|
|
-{
|
|
|
- int ret;
|
|
|
- unsigned char *p;
|
|
|
-#if defined(MBEDTLS_PEM_PARSE_C)
|
|
|
- size_t len;
|
|
|
- mbedtls_pem_context pem;
|
|
|
-
|
|
|
- mbedtls_pem_init( &pem );
|
|
|
-
|
|
|
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
- if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
- else
|
|
|
- ret = mbedtls_pem_read_buffer( &pem,
|
|
|
- "-----BEGIN PUBLIC KEY-----",
|
|
|
- "-----END PUBLIC KEY-----",
|
|
|
- key, NULL, 0, &len );
|
|
|
-
|
|
|
- if( ret == 0 )
|
|
|
- {
|
|
|
- /*
|
|
|
- * Was PEM encoded
|
|
|
- */
|
|
|
- key = pem.buf;
|
|
|
- keylen = pem.buflen;
|
|
|
- }
|
|
|
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
- {
|
|
|
- mbedtls_pem_free( &pem );
|
|
|
- return( ret );
|
|
|
- }
|
|
|
-#endif /* MBEDTLS_PEM_PARSE_C */
|
|
|
- p = (unsigned char *) key;
|
|
|
-
|
|
|
- ret = mbedtls_pk_parse_subpubkey( &p, p + keylen, ctx );
|
|
|
-
|
|
|
-#if defined(MBEDTLS_PEM_PARSE_C)
|
|
|
- mbedtls_pem_free( &pem );
|
|
|
-#endif
|
|
|
-
|
|
|
- return( ret );
|
|
|
-}
|
|
|
-
|
|
|
-#endif /* MBEDTLS_PK_PARSE_C */
|
|
|
+/*
|
|
|
+ * Public Key layer for parsing key files and structures
|
|
|
+ *
|
|
|
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
|
|
|
+ * SPDX-License-Identifier: Apache-2.0
|
|
|
+ *
|
|
|
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
|
+ * not use this file except in compliance with the License.
|
|
|
+ * You may obtain a copy of the License at
|
|
|
+ *
|
|
|
+ * http://www.apache.org/licenses/LICENSE-2.0
|
|
|
+ *
|
|
|
+ * Unless required by applicable law or agreed to in writing, software
|
|
|
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
|
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
+ * See the License for the specific language governing permissions and
|
|
|
+ * limitations under the License.
|
|
|
+ *
|
|
|
+ * This file is part of mbed TLS (https://tls.mbed.org)
|
|
|
+ */
|
|
|
+
|
|
|
+#if !defined(MBEDTLS_CONFIG_FILE)
|
|
|
+#include "mbedtls/config.h"
|
|
|
+#else
|
|
|
+#include MBEDTLS_CONFIG_FILE
|
|
|
+#endif
|
|
|
+
|
|
|
+#if defined(MBEDTLS_PK_PARSE_C)
|
|
|
+
|
|
|
+#include "mbedtls/pk.h"
|
|
|
+#include "mbedtls/asn1.h"
|
|
|
+#include "mbedtls/oid.h"
|
|
|
+
|
|
|
+#include <string.h>
|
|
|
+
|
|
|
+#if defined(MBEDTLS_RSA_C)
|
|
|
+#include "mbedtls/rsa.h"
|
|
|
+#endif
|
|
|
+#if defined(MBEDTLS_ECP_C)
|
|
|
+#include "mbedtls/ecp.h"
|
|
|
+#endif
|
|
|
+#if defined(MBEDTLS_ECDSA_C)
|
|
|
+#include "mbedtls/ecdsa.h"
|
|
|
+#endif
|
|
|
+#if defined(MBEDTLS_PEM_PARSE_C)
|
|
|
+#include "mbedtls/pem.h"
|
|
|
+#endif
|
|
|
+#if defined(MBEDTLS_PKCS5_C)
|
|
|
+#include "mbedtls/pkcs5.h"
|
|
|
+#endif
|
|
|
+#if defined(MBEDTLS_PKCS12_C)
|
|
|
+#include "mbedtls/pkcs12.h"
|
|
|
+#endif
|
|
|
+
|
|
|
+#if defined(MBEDTLS_PLATFORM_C)
|
|
|
+#include "mbedtls/platform.h"
|
|
|
+#else
|
|
|
+#include <stdlib.h>
|
|
|
+#define mbedtls_calloc calloc
|
|
|
+#define mbedtls_free free
|
|
|
+#endif
|
|
|
+
|
|
|
+#if defined(MBEDTLS_FS_IO)
|
|
|
+/* Implementation that should never be optimized out by the compiler */
|
|
|
+static void mbedtls_zeroize( void *v, size_t n ) {
|
|
|
+ volatile unsigned char *p = v; while( n-- ) *p++ = 0;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Load all data from a file into a given buffer.
|
|
|
+ *
|
|
|
+ * The file is expected to contain either PEM or DER encoded data.
|
|
|
+ * A terminating null byte is always appended. It is included in the announced
|
|
|
+ * length only if the data looks like it is PEM encoded.
|
|
|
+ */
|
|
|
+int mbedtls_pk_load_file( const char *path, unsigned char **buf, size_t *n )
|
|
|
+{
|
|
|
+ FILE *f;
|
|
|
+ long size;
|
|
|
+
|
|
|
+ if( ( f = fopen( path, "rb" ) ) == NULL )
|
|
|
+ return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
|
|
|
+
|
|
|
+ fseek( f, 0, SEEK_END );
|
|
|
+ if( ( size = ftell( f ) ) == -1 )
|
|
|
+ {
|
|
|
+ fclose( f );
|
|
|
+ return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
|
|
|
+ }
|
|
|
+ fseek( f, 0, SEEK_SET );
|
|
|
+
|
|
|
+ *n = (size_t) size;
|
|
|
+
|
|
|
+ if( *n + 1 == 0 ||
|
|
|
+ ( *buf = mbedtls_calloc( 1, *n + 1 ) ) == NULL )
|
|
|
+ {
|
|
|
+ fclose( f );
|
|
|
+ return( MBEDTLS_ERR_PK_ALLOC_FAILED );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( fread( *buf, 1, *n, f ) != *n )
|
|
|
+ {
|
|
|
+ fclose( f );
|
|
|
+ mbedtls_free( *buf );
|
|
|
+ return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
|
|
|
+ }
|
|
|
+
|
|
|
+ fclose( f );
|
|
|
+
|
|
|
+ (*buf)[*n] = '\0';
|
|
|
+
|
|
|
+ if( strstr( (const char *) *buf, "-----BEGIN " ) != NULL )
|
|
|
+ ++*n;
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Load and parse a private key
|
|
|
+ */
|
|
|
+int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
|
|
|
+ const char *path, const char *pwd )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ size_t n;
|
|
|
+ unsigned char *buf;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+ if( pwd == NULL )
|
|
|
+ ret = mbedtls_pk_parse_key( ctx, buf, n, NULL, 0 );
|
|
|
+ else
|
|
|
+ ret = mbedtls_pk_parse_key( ctx, buf, n,
|
|
|
+ (const unsigned char *) pwd, strlen( pwd ) );
|
|
|
+
|
|
|
+ mbedtls_zeroize( buf, n );
|
|
|
+ mbedtls_free( buf );
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Load and parse a public key
|
|
|
+ */
|
|
|
+int mbedtls_pk_parse_public_keyfile( mbedtls_pk_context *ctx, const char *path )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ size_t n;
|
|
|
+ unsigned char *buf;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+ ret = mbedtls_pk_parse_public_key( ctx, buf, n );
|
|
|
+
|
|
|
+ mbedtls_zeroize( buf, n );
|
|
|
+ mbedtls_free( buf );
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+}
|
|
|
+#endif /* MBEDTLS_FS_IO */
|
|
|
+
|
|
|
+#if defined(MBEDTLS_ECP_C)
|
|
|
+/* Minimally parse an ECParameters buffer to and mbedtls_asn1_buf
|
|
|
+ *
|
|
|
+ * ECParameters ::= CHOICE {
|
|
|
+ * namedCurve OBJECT IDENTIFIER
|
|
|
+ * specifiedCurve SpecifiedECDomain -- = SEQUENCE { ... }
|
|
|
+ * -- implicitCurve NULL
|
|
|
+ * }
|
|
|
+ */
|
|
|
+static int pk_get_ecparams( unsigned char **p, const unsigned char *end,
|
|
|
+ mbedtls_asn1_buf *params )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ /* Tag may be either OID or SEQUENCE */
|
|
|
+ params->tag = **p;
|
|
|
+ if( params->tag != MBEDTLS_ASN1_OID
|
|
|
+#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
|
|
|
+ && params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE )
|
|
|
+#endif
|
|
|
+ )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
+ MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( p, end, ¶ms->len, params->tag ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ params->p = *p;
|
|
|
+ *p += params->len;
|
|
|
+
|
|
|
+ if( *p != end )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+
|
|
|
+#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
|
|
|
+/*
|
|
|
+ * Parse a SpecifiedECDomain (SEC 1 C.2) and (mostly) fill the group with it.
|
|
|
+ * WARNING: the resulting group should only be used with
|
|
|
+ * pk_group_id_from_specified(), since its base point may not be set correctly
|
|
|
+ * if it was encoded compressed.
|
|
|
+ *
|
|
|
+ * SpecifiedECDomain ::= SEQUENCE {
|
|
|
+ * version SpecifiedECDomainVersion(ecdpVer1 | ecdpVer2 | ecdpVer3, ...),
|
|
|
+ * fieldID FieldID {{FieldTypes}},
|
|
|
+ * curve Curve,
|
|
|
+ * base ECPoint,
|
|
|
+ * order INTEGER,
|
|
|
+ * cofactor INTEGER OPTIONAL,
|
|
|
+ * hash HashAlgorithm OPTIONAL,
|
|
|
+ * ...
|
|
|
+ * }
|
|
|
+ *
|
|
|
+ * We only support prime-field as field type, and ignore hash and cofactor.
|
|
|
+ */
|
|
|
+static int pk_group_from_specified( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ unsigned char *p = params->p;
|
|
|
+ const unsigned char * const end = params->p + params->len;
|
|
|
+ const unsigned char *end_field, *end_curve;
|
|
|
+ size_t len;
|
|
|
+ int ver;
|
|
|
+
|
|
|
+ /* SpecifiedECDomainVersion ::= INTEGER { 1, 2, 3 } */
|
|
|
+ if( ( ret = mbedtls_asn1_get_int( &p, end, &ver ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( ver < 1 || ver > 3 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
+
|
|
|
+ /*
|
|
|
+ * FieldID { FIELD-ID:IOSet } ::= SEQUENCE { -- Finite field
|
|
|
+ * fieldType FIELD-ID.&id({IOSet}),
|
|
|
+ * parameters FIELD-ID.&Type({IOSet}{@fieldType})
|
|
|
+ * }
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+ end_field = p + len;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * FIELD-ID ::= TYPE-IDENTIFIER
|
|
|
+ * FieldTypes FIELD-ID ::= {
|
|
|
+ * { Prime-p IDENTIFIED BY prime-field } |
|
|
|
+ * { Characteristic-two IDENTIFIED BY characteristic-two-field }
|
|
|
+ * }
|
|
|
+ * prime-field OBJECT IDENTIFIER ::= { id-fieldType 1 }
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end_field, &len, MBEDTLS_ASN1_OID ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+ if( len != MBEDTLS_OID_SIZE( MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD ) ||
|
|
|
+ memcmp( p, MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD, len ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
|
|
|
+ }
|
|
|
+
|
|
|
+ p += len;
|
|
|
+
|
|
|
+ /* Prime-p ::= INTEGER -- Field of size p. */
|
|
|
+ if( ( ret = mbedtls_asn1_get_mpi( &p, end_field, &grp->P ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ grp->pbits = mbedtls_mpi_bitlen( &grp->P );
|
|
|
+
|
|
|
+ if( p != end_field )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Curve ::= SEQUENCE {
|
|
|
+ * a FieldElement,
|
|
|
+ * b FieldElement,
|
|
|
+ * seed BIT STRING OPTIONAL
|
|
|
+ * -- Shall be present if used in SpecifiedECDomain
|
|
|
+ * -- with version equal to ecdpVer2 or ecdpVer3
|
|
|
+ * }
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+ end_curve = p + len;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * FieldElement ::= OCTET STRING
|
|
|
+ * containing an integer in the case of a prime field
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_mpi_read_binary( &grp->A, p, len ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ p += len;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_mpi_read_binary( &grp->B, p, len ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ p += len;
|
|
|
+
|
|
|
+ /* Ignore seed BIT STRING OPTIONAL */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_BIT_STRING ) ) == 0 )
|
|
|
+ p += len;
|
|
|
+
|
|
|
+ if( p != end_curve )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
+
|
|
|
+ /*
|
|
|
+ * ECPoint ::= OCTET STRING
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_ecp_point_read_binary( grp, &grp->G,
|
|
|
+ ( const unsigned char *) p, len ) ) != 0 )
|
|
|
+ {
|
|
|
+ /*
|
|
|
+ * If we can't read the point because it's compressed, cheat by
|
|
|
+ * reading only the X coordinate and the parity bit of Y.
|
|
|
+ */
|
|
|
+ if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE ||
|
|
|
+ ( p[0] != 0x02 && p[0] != 0x03 ) ||
|
|
|
+ len != mbedtls_mpi_size( &grp->P ) + 1 ||
|
|
|
+ mbedtls_mpi_read_binary( &grp->G.X, p + 1, len - 1 ) != 0 ||
|
|
|
+ mbedtls_mpi_lset( &grp->G.Y, p[0] - 2 ) != 0 ||
|
|
|
+ mbedtls_mpi_lset( &grp->G.Z, 1 ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ p += len;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * order INTEGER
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_mpi( &p, end, &grp->N ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ grp->nbits = mbedtls_mpi_bitlen( &grp->N );
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Allow optional elements by purposefully not enforcing p == end here.
|
|
|
+ */
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Find the group id associated with an (almost filled) group as generated by
|
|
|
+ * pk_group_from_specified(), or return an error if unknown.
|
|
|
+ */
|
|
|
+static int pk_group_id_from_group( const mbedtls_ecp_group *grp, mbedtls_ecp_group_id *grp_id )
|
|
|
+{
|
|
|
+ int ret = 0;
|
|
|
+ mbedtls_ecp_group ref;
|
|
|
+ const mbedtls_ecp_group_id *id;
|
|
|
+
|
|
|
+ mbedtls_ecp_group_init( &ref );
|
|
|
+
|
|
|
+ for( id = mbedtls_ecp_grp_id_list(); *id != MBEDTLS_ECP_DP_NONE; id++ )
|
|
|
+ {
|
|
|
+ /* Load the group associated to that id */
|
|
|
+ mbedtls_ecp_group_free( &ref );
|
|
|
+ MBEDTLS_MPI_CHK( mbedtls_ecp_group_load( &ref, *id ) );
|
|
|
+
|
|
|
+ /* Compare to the group we were given, starting with easy tests */
|
|
|
+ if( grp->pbits == ref.pbits && grp->nbits == ref.nbits &&
|
|
|
+ mbedtls_mpi_cmp_mpi( &grp->P, &ref.P ) == 0 &&
|
|
|
+ mbedtls_mpi_cmp_mpi( &grp->A, &ref.A ) == 0 &&
|
|
|
+ mbedtls_mpi_cmp_mpi( &grp->B, &ref.B ) == 0 &&
|
|
|
+ mbedtls_mpi_cmp_mpi( &grp->N, &ref.N ) == 0 &&
|
|
|
+ mbedtls_mpi_cmp_mpi( &grp->G.X, &ref.G.X ) == 0 &&
|
|
|
+ mbedtls_mpi_cmp_mpi( &grp->G.Z, &ref.G.Z ) == 0 &&
|
|
|
+ /* For Y we may only know the parity bit, so compare only that */
|
|
|
+ mbedtls_mpi_get_bit( &grp->G.Y, 0 ) == mbedtls_mpi_get_bit( &ref.G.Y, 0 ) )
|
|
|
+ {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+cleanup:
|
|
|
+ mbedtls_ecp_group_free( &ref );
|
|
|
+
|
|
|
+ *grp_id = *id;
|
|
|
+
|
|
|
+ if( ret == 0 && *id == MBEDTLS_ECP_DP_NONE )
|
|
|
+ ret = MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Parse a SpecifiedECDomain (SEC 1 C.2) and find the associated group ID
|
|
|
+ */
|
|
|
+static int pk_group_id_from_specified( const mbedtls_asn1_buf *params,
|
|
|
+ mbedtls_ecp_group_id *grp_id )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ mbedtls_ecp_group grp;
|
|
|
+
|
|
|
+ mbedtls_ecp_group_init( &grp );
|
|
|
+
|
|
|
+ if( ( ret = pk_group_from_specified( params, &grp ) ) != 0 )
|
|
|
+ goto cleanup;
|
|
|
+
|
|
|
+ ret = pk_group_id_from_group( &grp, grp_id );
|
|
|
+
|
|
|
+cleanup:
|
|
|
+ mbedtls_ecp_group_free( &grp );
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+}
|
|
|
+#endif /* MBEDTLS_PK_PARSE_EC_EXTENDED */
|
|
|
+
|
|
|
+/*
|
|
|
+ * Use EC parameters to initialise an EC group
|
|
|
+ *
|
|
|
+ * ECParameters ::= CHOICE {
|
|
|
+ * namedCurve OBJECT IDENTIFIER
|
|
|
+ * specifiedCurve SpecifiedECDomain -- = SEQUENCE { ... }
|
|
|
+ * -- implicitCurve NULL
|
|
|
+ */
|
|
|
+static int pk_use_ecparams( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ mbedtls_ecp_group_id grp_id;
|
|
|
+
|
|
|
+ if( params->tag == MBEDTLS_ASN1_OID )
|
|
|
+ {
|
|
|
+ if( mbedtls_oid_get_ec_grp( params, &grp_id ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
|
|
|
+ if( ( ret = pk_group_id_from_specified( params, &grp_id ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+#else
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
+#endif
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * grp may already be initilialized; if so, make sure IDs match
|
|
|
+ */
|
|
|
+ if( grp->id != MBEDTLS_ECP_DP_NONE && grp->id != grp_id )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_ecp_group_load( grp, grp_id ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * EC public key is an EC point
|
|
|
+ *
|
|
|
+ * The caller is responsible for clearing the structure upon failure if
|
|
|
+ * desired. Take care to pass along the possible ECP_FEATURE_UNAVAILABLE
|
|
|
+ * return code of mbedtls_ecp_point_read_binary() and leave p in a usable state.
|
|
|
+ */
|
|
|
+static int pk_get_ecpubkey( unsigned char **p, const unsigned char *end,
|
|
|
+ mbedtls_ecp_keypair *key )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_ecp_point_read_binary( &key->grp, &key->Q,
|
|
|
+ (const unsigned char *) *p, end - *p ) ) == 0 )
|
|
|
+ {
|
|
|
+ ret = mbedtls_ecp_check_pubkey( &key->grp, &key->Q );
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * We know mbedtls_ecp_point_read_binary consumed all bytes or failed
|
|
|
+ */
|
|
|
+ *p = (unsigned char *) end;
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+}
|
|
|
+#endif /* MBEDTLS_ECP_C */
|
|
|
+
|
|
|
+#if defined(MBEDTLS_RSA_C)
|
|
|
+/*
|
|
|
+ * RSAPublicKey ::= SEQUENCE {
|
|
|
+ * modulus INTEGER, -- n
|
|
|
+ * publicExponent INTEGER -- e
|
|
|
+ * }
|
|
|
+ */
|
|
|
+static int pk_get_rsapubkey( unsigned char **p,
|
|
|
+ const unsigned char *end,
|
|
|
+ mbedtls_rsa_context *rsa )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ size_t len;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
|
|
|
+
|
|
|
+ if( *p + len != end )
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_mpi( p, end, &rsa->N ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_asn1_get_mpi( p, end, &rsa->E ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
|
|
|
+
|
|
|
+ if( *p != end )
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_rsa_check_pubkey( rsa ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_PUBKEY );
|
|
|
+
|
|
|
+ rsa->len = mbedtls_mpi_size( &rsa->N );
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+#endif /* MBEDTLS_RSA_C */
|
|
|
+
|
|
|
+/* Get a PK algorithm identifier
|
|
|
+ *
|
|
|
+ * AlgorithmIdentifier ::= SEQUENCE {
|
|
|
+ * algorithm OBJECT IDENTIFIER,
|
|
|
+ * parameters ANY DEFINED BY algorithm OPTIONAL }
|
|
|
+ */
|
|
|
+static int pk_get_pk_alg( unsigned char **p,
|
|
|
+ const unsigned char *end,
|
|
|
+ mbedtls_pk_type_t *pk_alg, mbedtls_asn1_buf *params )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ mbedtls_asn1_buf alg_oid;
|
|
|
+
|
|
|
+ memset( params, 0, sizeof(mbedtls_asn1_buf) );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_alg( p, end, &alg_oid, params ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_ALG + ret );
|
|
|
+
|
|
|
+ if( mbedtls_oid_get_pk_alg( &alg_oid, pk_alg ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
+
|
|
|
+ /*
|
|
|
+ * No parameters with RSA (only for EC)
|
|
|
+ */
|
|
|
+ if( *pk_alg == MBEDTLS_PK_RSA &&
|
|
|
+ ( ( params->tag != MBEDTLS_ASN1_NULL && params->tag != 0 ) ||
|
|
|
+ params->len != 0 ) )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_ALG );
|
|
|
+ }
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * SubjectPublicKeyInfo ::= SEQUENCE {
|
|
|
+ * algorithm AlgorithmIdentifier,
|
|
|
+ * subjectPublicKey BIT STRING }
|
|
|
+ */
|
|
|
+int mbedtls_pk_parse_subpubkey( unsigned char **p, const unsigned char *end,
|
|
|
+ mbedtls_pk_context *pk )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ size_t len;
|
|
|
+ mbedtls_asn1_buf alg_params;
|
|
|
+ mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
|
|
|
+ const mbedtls_pk_info_t *pk_info;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ end = *p + len;
|
|
|
+
|
|
|
+ if( ( ret = pk_get_pk_alg( p, end, &pk_alg, &alg_params ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_bitstring_null( p, end, &len ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
|
|
|
+
|
|
|
+ if( *p + len != end )
|
|
|
+ return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
+
|
|
|
+ if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+#if defined(MBEDTLS_RSA_C)
|
|
|
+ if( pk_alg == MBEDTLS_PK_RSA )
|
|
|
+ {
|
|
|
+ ret = pk_get_rsapubkey( p, end, mbedtls_pk_rsa( *pk ) );
|
|
|
+ } else
|
|
|
+#endif /* MBEDTLS_RSA_C */
|
|
|
+#if defined(MBEDTLS_ECP_C)
|
|
|
+ if( pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY )
|
|
|
+ {
|
|
|
+ ret = pk_use_ecparams( &alg_params, &mbedtls_pk_ec( *pk )->grp );
|
|
|
+ if( ret == 0 )
|
|
|
+ ret = pk_get_ecpubkey( p, end, mbedtls_pk_ec( *pk ) );
|
|
|
+ } else
|
|
|
+#endif /* MBEDTLS_ECP_C */
|
|
|
+ ret = MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
|
|
|
+
|
|
|
+ if( ret == 0 && *p != end )
|
|
|
+ ret = MBEDTLS_ERR_PK_INVALID_PUBKEY
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
|
|
|
+
|
|
|
+ if( ret != 0 )
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+}
|
|
|
+
|
|
|
+#if defined(MBEDTLS_RSA_C)
|
|
|
+/*
|
|
|
+ * Parse a PKCS#1 encoded private RSA key
|
|
|
+ */
|
|
|
+static int pk_parse_key_pkcs1_der( mbedtls_rsa_context *rsa,
|
|
|
+ const unsigned char *key,
|
|
|
+ size_t keylen )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ size_t len;
|
|
|
+ unsigned char *p, *end;
|
|
|
+
|
|
|
+ p = (unsigned char *) key;
|
|
|
+ end = p + keylen;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * This function parses the RSAPrivateKey (PKCS#1)
|
|
|
+ *
|
|
|
+ * RSAPrivateKey ::= SEQUENCE {
|
|
|
+ * version Version,
|
|
|
+ * modulus INTEGER, -- n
|
|
|
+ * publicExponent INTEGER, -- e
|
|
|
+ * privateExponent INTEGER, -- d
|
|
|
+ * prime1 INTEGER, -- p
|
|
|
+ * prime2 INTEGER, -- q
|
|
|
+ * exponent1 INTEGER, -- d mod (p-1)
|
|
|
+ * exponent2 INTEGER, -- d mod (q-1)
|
|
|
+ * coefficient INTEGER, -- (inverse of q) mod p
|
|
|
+ * otherPrimeInfos OtherPrimeInfos OPTIONAL
|
|
|
+ * }
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ end = p + len;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_int( &p, end, &rsa->ver ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( rsa->ver != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->N ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->E ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->D ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->P ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->Q ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->DP ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->DQ ) ) != 0 ||
|
|
|
+ ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->QP ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_rsa_free( rsa );
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ rsa->len = mbedtls_mpi_size( &rsa->N );
|
|
|
+
|
|
|
+ if( p != end )
|
|
|
+ {
|
|
|
+ mbedtls_rsa_free( rsa );
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_rsa_check_privkey( rsa ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_rsa_free( rsa );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+#endif /* MBEDTLS_RSA_C */
|
|
|
+
|
|
|
+#if defined(MBEDTLS_ECP_C)
|
|
|
+/*
|
|
|
+ * Parse a SEC1 encoded private EC key
|
|
|
+ */
|
|
|
+static int pk_parse_key_sec1_der( mbedtls_ecp_keypair *eck,
|
|
|
+ const unsigned char *key,
|
|
|
+ size_t keylen )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ int version, pubkey_done;
|
|
|
+ size_t len;
|
|
|
+ mbedtls_asn1_buf params;
|
|
|
+ unsigned char *p = (unsigned char *) key;
|
|
|
+ unsigned char *end = p + keylen;
|
|
|
+ unsigned char *end2;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * RFC 5915, or SEC1 Appendix C.4
|
|
|
+ *
|
|
|
+ * ECPrivateKey ::= SEQUENCE {
|
|
|
+ * version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
|
|
|
+ * privateKey OCTET STRING,
|
|
|
+ * parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
|
|
|
+ * publicKey [1] BIT STRING OPTIONAL
|
|
|
+ * }
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ end = p + len;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( version != 1 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_mpi_read_binary( &eck->d, p, len ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_ecp_keypair_free( eck );
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ p += len;
|
|
|
+
|
|
|
+ pubkey_done = 0;
|
|
|
+ if( p != end )
|
|
|
+ {
|
|
|
+ /*
|
|
|
+ * Is 'parameters' present?
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) == 0 )
|
|
|
+ {
|
|
|
+ if( ( ret = pk_get_ecparams( &p, p + len, ¶ms) ) != 0 ||
|
|
|
+ ( ret = pk_use_ecparams( ¶ms, &eck->grp ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_ecp_keypair_free( eck );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
|
|
|
+ {
|
|
|
+ mbedtls_ecp_keypair_free( eck );
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Is 'publickey' present? If not, or if we can't read it (eg because it
|
|
|
+ * is compressed), create it from the private key.
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ) == 0 )
|
|
|
+ {
|
|
|
+ end2 = p + len;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_bitstring_null( &p, end2, &len ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( p + len != end2 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
+ MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
+
|
|
|
+ if( ( ret = pk_get_ecpubkey( &p, end2, eck ) ) == 0 )
|
|
|
+ pubkey_done = 1;
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /*
|
|
|
+ * The only acceptable failure mode of pk_get_ecpubkey() above
|
|
|
+ * is if the point format is not recognized.
|
|
|
+ */
|
|
|
+ if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
|
|
|
+ {
|
|
|
+ mbedtls_ecp_keypair_free( eck );
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if( ! pubkey_done &&
|
|
|
+ ( ret = mbedtls_ecp_mul( &eck->grp, &eck->Q, &eck->d, &eck->grp.G,
|
|
|
+ NULL, NULL ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_ecp_keypair_free( eck );
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_ecp_keypair_free( eck );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+#endif /* MBEDTLS_ECP_C */
|
|
|
+
|
|
|
+/*
|
|
|
+ * Parse an unencrypted PKCS#8 encoded private key
|
|
|
+ */
|
|
|
+static int pk_parse_key_pkcs8_unencrypted_der(
|
|
|
+ mbedtls_pk_context *pk,
|
|
|
+ const unsigned char* key,
|
|
|
+ size_t keylen )
|
|
|
+{
|
|
|
+ int ret, version;
|
|
|
+ size_t len;
|
|
|
+ mbedtls_asn1_buf params;
|
|
|
+ unsigned char *p = (unsigned char *) key;
|
|
|
+ unsigned char *end = p + keylen;
|
|
|
+ mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
|
|
|
+ const mbedtls_pk_info_t *pk_info;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * This function parses the PrivatKeyInfo object (PKCS#8 v1.2 = RFC 5208)
|
|
|
+ *
|
|
|
+ * PrivateKeyInfo ::= SEQUENCE {
|
|
|
+ * version Version,
|
|
|
+ * privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
|
|
|
+ * privateKey PrivateKey,
|
|
|
+ * attributes [0] IMPLICIT Attributes OPTIONAL }
|
|
|
+ *
|
|
|
+ * Version ::= INTEGER
|
|
|
+ * PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
|
|
|
+ * PrivateKey ::= OCTET STRING
|
|
|
+ *
|
|
|
+ * The PrivateKey OCTET STRING is a SEC1 ECPrivateKey
|
|
|
+ */
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ end = p + len;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( version != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION + ret );
|
|
|
+
|
|
|
+ if( ( ret = pk_get_pk_alg( &p, end, &pk_alg, ¶ms ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( len < 1 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
|
|
|
+ MBEDTLS_ERR_ASN1_OUT_OF_DATA );
|
|
|
+
|
|
|
+ if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+#if defined(MBEDTLS_RSA_C)
|
|
|
+ if( pk_alg == MBEDTLS_PK_RSA )
|
|
|
+ {
|
|
|
+ if( ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), p, len ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+ } else
|
|
|
+#endif /* MBEDTLS_RSA_C */
|
|
|
+#if defined(MBEDTLS_ECP_C)
|
|
|
+ if( pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH )
|
|
|
+ {
|
|
|
+ if( ( ret = pk_use_ecparams( ¶ms, &mbedtls_pk_ec( *pk )->grp ) ) != 0 ||
|
|
|
+ ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), p, len ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+ } else
|
|
|
+#endif /* MBEDTLS_ECP_C */
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
+
|
|
|
+ return( 0 );
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Parse an encrypted PKCS#8 encoded private key
|
|
|
+ */
|
|
|
+#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
|
|
|
+static int pk_parse_key_pkcs8_encrypted_der(
|
|
|
+ mbedtls_pk_context *pk,
|
|
|
+ const unsigned char *key, size_t keylen,
|
|
|
+ const unsigned char *pwd, size_t pwdlen )
|
|
|
+{
|
|
|
+ int ret, decrypted = 0;
|
|
|
+ size_t len;
|
|
|
+ unsigned char buf[2048];
|
|
|
+ unsigned char *p, *end;
|
|
|
+ mbedtls_asn1_buf pbe_alg_oid, pbe_params;
|
|
|
+#if defined(MBEDTLS_PKCS12_C)
|
|
|
+ mbedtls_cipher_type_t cipher_alg;
|
|
|
+ mbedtls_md_type_t md_alg;
|
|
|
+#endif
|
|
|
+
|
|
|
+ memset( buf, 0, sizeof( buf ) );
|
|
|
+
|
|
|
+ p = (unsigned char *) key;
|
|
|
+ end = p + keylen;
|
|
|
+
|
|
|
+ if( pwdlen == 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
|
|
|
+
|
|
|
+ /*
|
|
|
+ * This function parses the EncryptedPrivatKeyInfo object (PKCS#8)
|
|
|
+ *
|
|
|
+ * EncryptedPrivateKeyInfo ::= SEQUENCE {
|
|
|
+ * encryptionAlgorithm EncryptionAlgorithmIdentifier,
|
|
|
+ * encryptedData EncryptedData
|
|
|
+ * }
|
|
|
+ *
|
|
|
+ * EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
|
|
|
+ *
|
|
|
+ * EncryptedData ::= OCTET STRING
|
|
|
+ *
|
|
|
+ * The EncryptedData OCTET STRING is a PKCS#8 PrivateKeyInfo
|
|
|
+ */
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
|
|
+ MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ end = p + len;
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_alg( &p, end, &pbe_alg_oid, &pbe_params ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
|
|
|
+
|
|
|
+ if( len > sizeof( buf ) )
|
|
|
+ return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Decrypt EncryptedData with appropriate PDE
|
|
|
+ */
|
|
|
+#if defined(MBEDTLS_PKCS12_C)
|
|
|
+ if( mbedtls_oid_get_pkcs12_pbe_alg( &pbe_alg_oid, &md_alg, &cipher_alg ) == 0 )
|
|
|
+ {
|
|
|
+ if( ( ret = mbedtls_pkcs12_pbe( &pbe_params, MBEDTLS_PKCS12_PBE_DECRYPT,
|
|
|
+ cipher_alg, md_alg,
|
|
|
+ pwd, pwdlen, p, len, buf ) ) != 0 )
|
|
|
+ {
|
|
|
+ if( ret == MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH )
|
|
|
+ return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ decrypted = 1;
|
|
|
+ }
|
|
|
+ else if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_128, &pbe_alg_oid ) == 0 )
|
|
|
+ {
|
|
|
+ if( ( ret = mbedtls_pkcs12_pbe_sha1_rc4_128( &pbe_params,
|
|
|
+ MBEDTLS_PKCS12_PBE_DECRYPT,
|
|
|
+ pwd, pwdlen,
|
|
|
+ p, len, buf ) ) != 0 )
|
|
|
+ {
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ // Best guess for password mismatch when using RC4. If first tag is
|
|
|
+ // not MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE
|
|
|
+ //
|
|
|
+ if( *buf != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
|
|
|
+ return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
+
|
|
|
+ decrypted = 1;
|
|
|
+ }
|
|
|
+ else
|
|
|
+#endif /* MBEDTLS_PKCS12_C */
|
|
|
+#if defined(MBEDTLS_PKCS5_C)
|
|
|
+ if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS5_PBES2, &pbe_alg_oid ) == 0 )
|
|
|
+ {
|
|
|
+ if( ( ret = mbedtls_pkcs5_pbes2( &pbe_params, MBEDTLS_PKCS5_DECRYPT, pwd, pwdlen,
|
|
|
+ p, len, buf ) ) != 0 )
|
|
|
+ {
|
|
|
+ if( ret == MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH )
|
|
|
+ return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+
|
|
|
+ decrypted = 1;
|
|
|
+ }
|
|
|
+ else
|
|
|
+#endif /* MBEDTLS_PKCS5_C */
|
|
|
+ {
|
|
|
+ ((void) pwd);
|
|
|
+ }
|
|
|
+
|
|
|
+ if( decrypted == 0 )
|
|
|
+ return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
|
|
|
+
|
|
|
+ return( pk_parse_key_pkcs8_unencrypted_der( pk, buf, len ) );
|
|
|
+}
|
|
|
+#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
|
|
|
+
|
|
|
+/*
|
|
|
+ * Parse a private key
|
|
|
+ */
|
|
|
+int mbedtls_pk_parse_key( mbedtls_pk_context *pk,
|
|
|
+ const unsigned char *key, size_t keylen,
|
|
|
+ const unsigned char *pwd, size_t pwdlen )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ const mbedtls_pk_info_t *pk_info;
|
|
|
+
|
|
|
+#if defined(MBEDTLS_PEM_PARSE_C)
|
|
|
+ size_t len;
|
|
|
+ mbedtls_pem_context pem;
|
|
|
+
|
|
|
+ mbedtls_pem_init( &pem );
|
|
|
+
|
|
|
+#if defined(MBEDTLS_RSA_C)
|
|
|
+ /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
+ if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
+ ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
+ else
|
|
|
+ ret = mbedtls_pem_read_buffer( &pem,
|
|
|
+ "-----BEGIN RSA PRIVATE KEY-----",
|
|
|
+ "-----END RSA PRIVATE KEY-----",
|
|
|
+ key, pwd, pwdlen, &len );
|
|
|
+
|
|
|
+ if( ret == 0 )
|
|
|
+ {
|
|
|
+ if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
|
|
|
+ ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ),
|
|
|
+ pem.buf, pem.buflen ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+ }
|
|
|
+
|
|
|
+ mbedtls_pem_free( &pem );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+ else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
|
|
|
+ return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
+ else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
|
|
|
+ return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
|
|
|
+ else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
+ return( ret );
|
|
|
+#endif /* MBEDTLS_RSA_C */
|
|
|
+
|
|
|
+#if defined(MBEDTLS_ECP_C)
|
|
|
+ /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
+ if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
+ ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
+ else
|
|
|
+ ret = mbedtls_pem_read_buffer( &pem,
|
|
|
+ "-----BEGIN EC PRIVATE KEY-----",
|
|
|
+ "-----END EC PRIVATE KEY-----",
|
|
|
+ key, pwd, pwdlen, &len );
|
|
|
+ if( ret == 0 )
|
|
|
+ {
|
|
|
+ if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
|
|
|
+ ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ),
|
|
|
+ pem.buf, pem.buflen ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+ }
|
|
|
+
|
|
|
+ mbedtls_pem_free( &pem );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+ else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
|
|
|
+ return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
|
|
|
+ else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
|
|
|
+ return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
|
|
|
+ else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
+ return( ret );
|
|
|
+#endif /* MBEDTLS_ECP_C */
|
|
|
+
|
|
|
+ /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
+ if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
+ ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
+ else
|
|
|
+ ret = mbedtls_pem_read_buffer( &pem,
|
|
|
+ "-----BEGIN PRIVATE KEY-----",
|
|
|
+ "-----END PRIVATE KEY-----",
|
|
|
+ key, NULL, 0, &len );
|
|
|
+ if( ret == 0 )
|
|
|
+ {
|
|
|
+ if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk,
|
|
|
+ pem.buf, pem.buflen ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+ }
|
|
|
+
|
|
|
+ mbedtls_pem_free( &pem );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+ else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
+ return( ret );
|
|
|
+
|
|
|
+#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
|
|
|
+ /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
+ if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
+ ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
+ else
|
|
|
+ ret = mbedtls_pem_read_buffer( &pem,
|
|
|
+ "-----BEGIN ENCRYPTED PRIVATE KEY-----",
|
|
|
+ "-----END ENCRYPTED PRIVATE KEY-----",
|
|
|
+ key, NULL, 0, &len );
|
|
|
+ if( ret == 0 )
|
|
|
+ {
|
|
|
+ if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk,
|
|
|
+ pem.buf, pem.buflen,
|
|
|
+ pwd, pwdlen ) ) != 0 )
|
|
|
+ {
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+ }
|
|
|
+
|
|
|
+ mbedtls_pem_free( &pem );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+ else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
+ return( ret );
|
|
|
+#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
|
|
|
+#else
|
|
|
+ ((void) ret);
|
|
|
+ ((void) pwd);
|
|
|
+ ((void) pwdlen);
|
|
|
+#endif /* MBEDTLS_PEM_PARSE_C */
|
|
|
+
|
|
|
+ /*
|
|
|
+ * At this point we only know it's not a PEM formatted key. Could be any
|
|
|
+ * of the known DER encoded private key formats
|
|
|
+ *
|
|
|
+ * We try the different DER format parsers to see if one passes without
|
|
|
+ * error
|
|
|
+ */
|
|
|
+#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
|
|
|
+ if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, key, keylen,
|
|
|
+ pwd, pwdlen ) ) == 0 )
|
|
|
+ {
|
|
|
+ return( 0 );
|
|
|
+ }
|
|
|
+
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+
|
|
|
+ if( ret == MBEDTLS_ERR_PK_PASSWORD_MISMATCH )
|
|
|
+ {
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
|
|
|
+
|
|
|
+ if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk, key, keylen ) ) == 0 )
|
|
|
+ return( 0 );
|
|
|
+
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+
|
|
|
+#if defined(MBEDTLS_RSA_C)
|
|
|
+ if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
|
|
|
+ ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), key, keylen ) ) == 0 )
|
|
|
+ {
|
|
|
+ return( 0 );
|
|
|
+ }
|
|
|
+
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+#endif /* MBEDTLS_RSA_C */
|
|
|
+
|
|
|
+#if defined(MBEDTLS_ECP_C)
|
|
|
+ if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
|
|
|
+ return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
|
|
|
+
|
|
|
+ if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
|
|
|
+ ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), key, keylen ) ) == 0 )
|
|
|
+ {
|
|
|
+ return( 0 );
|
|
|
+ }
|
|
|
+
|
|
|
+ mbedtls_pk_free( pk );
|
|
|
+#endif /* MBEDTLS_ECP_C */
|
|
|
+
|
|
|
+ return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Parse a public key
|
|
|
+ */
|
|
|
+int mbedtls_pk_parse_public_key( mbedtls_pk_context *ctx,
|
|
|
+ const unsigned char *key, size_t keylen )
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ unsigned char *p;
|
|
|
+#if defined(MBEDTLS_PEM_PARSE_C)
|
|
|
+ size_t len;
|
|
|
+ mbedtls_pem_context pem;
|
|
|
+
|
|
|
+ mbedtls_pem_init( &pem );
|
|
|
+
|
|
|
+ /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
|
|
|
+ if( keylen == 0 || key[keylen - 1] != '\0' )
|
|
|
+ ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
|
|
+ else
|
|
|
+ ret = mbedtls_pem_read_buffer( &pem,
|
|
|
+ "-----BEGIN PUBLIC KEY-----",
|
|
|
+ "-----END PUBLIC KEY-----",
|
|
|
+ key, NULL, 0, &len );
|
|
|
+
|
|
|
+ if( ret == 0 )
|
|
|
+ {
|
|
|
+ /*
|
|
|
+ * Was PEM encoded
|
|
|
+ */
|
|
|
+ key = pem.buf;
|
|
|
+ keylen = pem.buflen;
|
|
|
+ }
|
|
|
+ else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
|
|
|
+ {
|
|
|
+ mbedtls_pem_free( &pem );
|
|
|
+ return( ret );
|
|
|
+ }
|
|
|
+#endif /* MBEDTLS_PEM_PARSE_C */
|
|
|
+ p = (unsigned char *) key;
|
|
|
+
|
|
|
+ ret = mbedtls_pk_parse_subpubkey( &p, p + keylen, ctx );
|
|
|
+
|
|
|
+#if defined(MBEDTLS_PEM_PARSE_C)
|
|
|
+ mbedtls_pem_free( &pem );
|
|
|
+#endif
|
|
|
+
|
|
|
+ return( ret );
|
|
|
+}
|
|
|
+
|
|
|
+#endif /* MBEDTLS_PK_PARSE_C */
|
