gnutls_aead_cipher_decrypt3
Api function
Usage
#include <gnutls/crypto.h>
int gnutls_aead_cipher_decrypt(gnutls_aead_cipher_hd_t handle, const void * nonce, size_t nonce_len, const void * auth, size_t auth_len, size_t tag_size, const void * ctext, size_t ctext_len, void * ptext, size_t * ptext_len);
Arguments
gnutls_aead_cipher_hd_t handle
|
is a |
|---|---|
const void * nonce
|
the nonce to set |
size_t nonce_len
|
The length of the nonce |
const void * auth
|
additional data to be authenticated |
size_t auth_len
|
The length of the data |
size_t tag_size
|
The size of the tag to use (use zero for the default) |
const void * ctext
|
the data to decrypt (including the authentication tag) |
size_t ctext_len
|
the length of data to decrypt (includes tag size) |
void * ptext
|
the decrypted data |
size_t * ptext_len
|
the length of decrypted data (initially must hold the maximum available size) |
Overview
This function will decrypt the given data using the algorithm specified by the context. This function must be provided the complete data to be decrypted, including the authentication tag. On several AEAD ciphers, the authentication tag is appended to the ciphertext, though this is not a general rule. This function will fail if the tag verification fails.
Returns
Zero or a negative error code on verification failure or other error.
Since
3.4.0
Releases
6 releases since Debian 9 (Stretch); the text changed 5 times.