gnutls_cipher_add_auth ()

int
gnutls_cipher_add_auth (gnutls_cipher_hd_t handle,
                        const void *text,
                        size_t text_size);

This function operates on authenticated encryption with associated data (AEAD) ciphers and authenticate the input data. This function can only be called once and before any encryption operations.

Since 3.0

gnutls_cipher_decrypt ()

int
gnutls_cipher_decrypt (const gnutls_cipher_hd_t handle,
                       void *ciphertext,
                       size_t ciphertextlen);

This function will decrypt the given data using the algorithm specified by the context.

Note that in AEAD ciphers, this will not check the tag. You will need to compare the tag sent with the value returned from gnutls_cipher_tag().

Since 2.10.0

gnutls_cipher_decrypt2 ()

int
gnutls_cipher_decrypt2 (gnutls_cipher_hd_t handle,
                        const void *ciphertext,
                        size_t ciphertextlen,
                        void *text,
                        size_t textlen);

This function will decrypt the given data using the algorithm specified by the context.

Note that in AEAD ciphers, this will not check the tag. You will need to compare the tag sent with the value returned from gnutls_cipher_tag().

Since 2.12.0

gnutls_cipher_deinit ()

void
gnutls_cipher_deinit (gnutls_cipher_hd_t handle);

This function will deinitialize all resources occupied by the given encryption context.

Since 2.10.0

gnutls_cipher_encrypt ()

int
gnutls_cipher_encrypt (const gnutls_cipher_hd_t handle,
                       void *text,
                       size_t textlen);

This function will encrypt the given data using the algorithm specified by the context.

Since 2.10.0

gnutls_cipher_encrypt2 ()

int
gnutls_cipher_encrypt2 (gnutls_cipher_hd_t handle,
                        const void *text,
                        size_t textlen,
                        void *ciphertext,
                        size_t ciphertextlen);

This function will encrypt the given data using the algorithm specified by the context.

Since 2.12.0

gnutls_cipher_get_block_size ()

int
gnutls_cipher_get_block_size (gnutls_cipher_algorithm_t algorithm);

Since 2.10.0

gnutls_cipher_init ()

int
gnutls_cipher_init (gnutls_cipher_hd_t *handle,
                    gnutls_cipher_algorithm_t cipher,
                    const gnutls_datum_t *key,
                    const gnutls_datum_t *iv);

This function will initialize an context that can be used for encryption/decryption of data. This will effectively use the current crypto backend in use by gnutls or the cryptographic accelerator in use.

Since 2.10.0

gnutls_cipher_set_iv ()

void
gnutls_cipher_set_iv (gnutls_cipher_hd_t handle,
                      void *iv,
                      size_t ivlen);

This function will set the IV to be used for the next encryption block.

Since 3.0

gnutls_cipher_tag ()

int
gnutls_cipher_tag (gnutls_cipher_hd_t handle,
                   void *tag,
                   size_t tag_size);

This function operates on authenticated encryption with associated data (AEAD) ciphers and will return the output tag.

Since 3.0

gnutls_hash ()

int
gnutls_hash (gnutls_hash_hd_t handle,
             const void *text,
             size_t textlen);

This function will hash the given data using the algorithm specified by the context.

Since 2.10.0

gnutls_hash_deinit ()

void
gnutls_hash_deinit (gnutls_hash_hd_t handle,
                    void *digest);

This function will deinitialize all resources occupied by the given hash context.

Since 2.10.0

gnutls_hash_fast ()

int
gnutls_hash_fast (gnutls_digest_algorithm_t algorithm,
                  const void *text,
                  size_t textlen,
                  void *digest);

This convenience function will hash the given data and return output on a single call.

Since 2.10.0

gnutls_hash_get_len ()

int
gnutls_hash_get_len (gnutls_digest_algorithm_t algorithm);

This function will return the length of the output data of the given hash algorithm.

Since 2.10.0

gnutls_hash_init ()

int
gnutls_hash_init (gnutls_hash_hd_t *dig,
                  gnutls_digest_algorithm_t algorithm);

This function will initialize an context that can be used to produce a Message Digest of data. This will effectively use the current crypto backend in use by gnutls or the cryptographic accelerator in use.

Since 2.10.0

gnutls_hash_output ()

void
gnutls_hash_output (gnutls_hash_hd_t handle,
                    void *digest);

This function will output the current hash value and reset the state of the hash.

Since 2.10.0

gnutls_hmac ()

int
gnutls_hmac (gnutls_hmac_hd_t handle,
             const void *text,
             size_t textlen);

This function will hash the given data using the algorithm specified by the context.

Since 2.10.0

gnutls_hmac_deinit ()

void
gnutls_hmac_deinit (gnutls_hmac_hd_t handle,
                    void *digest);

This function will deinitialize all resources occupied by the given hmac context.

Since 2.10.0

gnutls_hmac_fast ()

int
gnutls_hmac_fast (gnutls_mac_algorithm_t algorithm,
                  const void *key,
                  size_t keylen,
                  const void *text,
                  size_t textlen,
                  void *digest);

This convenience function will hash the given data and return output on a single call.

Since 2.10.0

gnutls_hmac_get_len ()

int
gnutls_hmac_get_len (gnutls_mac_algorithm_t algorithm);

This function will return the length of the output data of the given hmac algorithm.

Since 2.10.0

gnutls_hmac_init ()

int
gnutls_hmac_init (gnutls_hmac_hd_t *dig,
                  gnutls_mac_algorithm_t algorithm,
                  const void *key,
                  size_t keylen);

This function will initialize an context that can be used to produce a Message Authentication Code (MAC) of data. This will effectively use the current crypto backend in use by gnutls or the cryptographic accelerator in use.

Note that despite the name of this function, it can be used for other MAC algorithms than HMAC.

Since 2.10.0

gnutls_hmac_output ()

void
gnutls_hmac_output (gnutls_hmac_hd_t handle,
                    void *digest);

This function will output the current MAC value and reset the state of the MAC.

Since 2.10.0

gnutls_rnd ()

int
gnutls_rnd (gnutls_rnd_level_t level,
            void *data,
            size_t len);

This function will generate random data and store it to output buffer.

Since 2.12.0

gnutls_cipher_hd_t

typedef struct api_cipher_hd_st *gnutls_cipher_hd_t;

gnutls_hash_hd_t

typedef struct hash_hd_st *gnutls_hash_hd_t;

gnutls_hmac_hd_t

typedef struct hmac_hd_st *gnutls_hmac_hd_t;

enum gnutls_rnd_level_t

Enumeration of random quality levels.