gnutls_aead_cipher_set_key - Linux
Overview
gnutls_aead_cipher_set_key is a GnuTLS function for setting the key for an Authenticated Encryption with Associated Data (AEAD) cipher. AEAD ciphers combine encryption with authentication to provide both confidentiality and integrity.
Syntax
gnutls_aead_cipher_set_key(gnutls_aead_cipher_t aead, const void *key, size_t key_size);
Options/Flags
The following options are available:
- aead: The
gnutls_aead_cipher_t
object to set the key for. - key: The key to set.
- key_size: The size of the key in bytes.
Examples
The following example shows how to set the key for an AES-GCM cipher:
#include <gnutls/gnutls.h>
int main() {
gnutls_aead_cipher_t aead;
uint8_t key[16];
// Initialize the AEAD cipher
gnutls_aead_cipher_init(&aead);
// Set the key
gnutls_aead_cipher_set_key(&aead, key, 16);
// Use the AEAD cipher
...
// Destroy the AEAD cipher
gnutls_aead_cipher_deinit(&aead);
return 0;
}
Common Issues
One common issue is trying to set the key for a cipher that is not an AEAD cipher. This will result in an error.
Another common issue is trying to set a key that is too large or too small for the cipher. This will also result in an error.
Integration
gnutls_aead_cipher_set_key can be used with other GnuTLS functions to create a complete encryption and authentication system. For example, it can be used with gnutls_aead_cipher_encrypt()
and gnutls_aead_cipher_decrypt()
to encrypt and decrypt data.