gnutls_aead_cipher_decrypt - API function

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)

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.

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.

Name

gnutls_aead_cipher_decrypt - API function

Reporting Bugs

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

Returns

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

Since

3.4.0

Synopsis

#include<gnutls/crypto.h>intgnutls_aead_cipher_decrypt(gnutls_aead_cipher_hd_thandle,constvoid*nonce,size_tnonce_len,constvoid*auth,size_tauth_len,size_ttag_size,constvoid*ctext,size_tctext_len,void*ptext,size_t*ptext_len);