gnutls_aead_cipher_decrypt(3) gnutls gnutls_aead_cipher_decrypt(3)

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);

is a gnutls_aead_cipher_hd_t type.
the nonce to set
The length of the nonce
additional data to be authenticated
The length of the data
The size of the tag to use (use zero for the default)
the data to decrypt (including the authentication tag)
the length of data to decrypt (includes tag size)
the decrypted data
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 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.

Zero or a negative error code on verification failure or other error.


Report bugs to <>.
Home page:

Copyright © 2001-2023 Free Software Foundation, Inc., and others.
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

The full documentation for gnutls is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit

3.8.5 gnutls