NAME

gnutls_aead_cipher_decrypt - API function

SYNOPSIS

#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 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: 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)

DESCRIPTION

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

REPORTING BUGS

Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org

COPYRIGHT

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.