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- #ifndef MBEDTLS_GCM_H
- #define MBEDTLS_GCM_H
- #include "cipher.h"
- #include <stdint.h>
- #define MBEDTLS_GCM_ENCRYPT 1
- #define MBEDTLS_GCM_DECRYPT 0
- #define MBEDTLS_ERR_GCM_AUTH_FAILED -0x0012
- #define MBEDTLS_ERR_GCM_BAD_INPUT -0x0014
- #ifdef __cplusplus
- extern "C" {
- #endif
- typedef struct {
- mbedtls_cipher_context_t cipher_ctx;
- uint64_t HL[16];
- uint64_t HH[16];
- uint64_t len;
- uint64_t add_len;
- unsigned char base_ectr[16];
- unsigned char y[16];
- unsigned char buf[16];
- int mode;
- }
- mbedtls_gcm_context;
- void mbedtls_gcm_init( mbedtls_gcm_context *ctx );
- int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
- mbedtls_cipher_id_t cipher,
- const unsigned char *key,
- unsigned int keybits );
- int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
- int mode,
- size_t length,
- const unsigned char *iv,
- size_t iv_len,
- const unsigned char *add,
- size_t add_len,
- const unsigned char *input,
- unsigned char *output,
- size_t tag_len,
- unsigned char *tag );
- int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
- size_t length,
- const unsigned char *iv,
- size_t iv_len,
- const unsigned char *add,
- size_t add_len,
- const unsigned char *tag,
- size_t tag_len,
- const unsigned char *input,
- unsigned char *output );
- int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
- int mode,
- const unsigned char *iv,
- size_t iv_len,
- const unsigned char *add,
- size_t add_len );
- int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
- size_t length,
- const unsigned char *input,
- unsigned char *output );
- int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
- unsigned char *tag,
- size_t tag_len );
- void mbedtls_gcm_free( mbedtls_gcm_context *ctx );
- int mbedtls_gcm_self_test( int verbose );
- #ifdef __cplusplus
- }
- #endif
- #endif
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