gnutls_aead_cipher_decrypt man page

gnutls_aead_cipher_decrypt — API function


#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);


gnutls_aead_cipher_hd_t handle
is a gnutls_aead_cipher_hd_t type.
const void * nonce
the nonce to set
size_t nonce_len
The length of the nonce
const void * auth
the 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
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)


This function will decrypt the given data using the algorithm specified by the context. This function must be provided the whole data to be decrypted, including the tag, and will fail if the tag verification fails.


Zero or a negative error code on error.



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3.5.8 gnutls gnutls