38 #define MBEDTLS_GCM_ENCRYPT 1 39 #define MBEDTLS_GCM_DECRYPT 0 41 #define MBEDTLS_ERR_GCM_AUTH_FAILED -0x0012 42 #define MBEDTLS_ERR_GCM_HW_ACCEL_FAILED -0x0013 43 #define MBEDTLS_ERR_GCM_BAD_INPUT -0x0014 45 #if !defined(MBEDTLS_GCM_ALT) 60 unsigned char base_ectr[16];
62 unsigned char buf[16];
98 const unsigned char *key,
99 unsigned int keybits );
148 const unsigned char *iv,
150 const unsigned char *add,
152 const unsigned char *input,
153 unsigned char *output,
155 unsigned char *tag );
186 const unsigned char *iv,
188 const unsigned char *add,
190 const unsigned char *tag,
192 const unsigned char *input,
193 unsigned char *output );
211 const unsigned char *iv,
213 const unsigned char *add,
237 const unsigned char *input,
238 unsigned char *output );
void mbedtls_gcm_init(mbedtls_gcm_context *ctx)
This function initializes the specified GCM context, to make references valid, and prepares the conte...
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)
This function starts a GCM encryption or decryption operation.
int mbedtls_gcm_self_test(int verbose)
The GCM checkup routine.
void mbedtls_gcm_free(mbedtls_gcm_context *ctx)
This function clears a GCM context and the underlying cipher sub-context.
The GCM context structure.
mbedtls_cipher_context_t cipher_ctx
int mbedtls_gcm_update(mbedtls_gcm_context *ctx, size_t length, const unsigned char *input, unsigned char *output)
This function feeds an input buffer into an ongoing GCM encryption or decryption operation.
mbedtls_cipher_id_t
An enumeration of supported ciphers.
The generic cipher wrapper.
int mbedtls_gcm_setkey(mbedtls_gcm_context *ctx, mbedtls_cipher_id_t cipher, const unsigned char *key, unsigned int keybits)
This function associates a GCM context with a cipher algorithm and a key.
int mbedtls_gcm_finish(mbedtls_gcm_context *ctx, unsigned char *tag, size_t tag_len)
This function finishes the GCM operation and generates the authentication 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)
This function performs a GCM authenticated decryption of a buffer.
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)
This function performs GCM encryption or decryption of a buffer.