gnutls_cipher_get_tag_size - Linux

Overview

gnutls_cipher_get_tag_size is a Linux command that retrieves the size of the authentication tag associated with a specified cipher. This information is essential for protocols that use authenticated encryption, such as TLS and IPsec.

Syntax

gnutls_cipher_get_tag_size(CIPHER)
  • CIPHER: The name of the cipher for which to retrieve the tag size.

Options/Flags

None.

Examples

# Get the tag size for the AES-256-GCM cipher
gnutls_cipher_get_tag_size(AES-256-GCM)

Common Issues

If the specified cipher does not support authentication (i.e., it is a stream cipher), gnutls_cipher_get_tag_size will return -1.

Integration

gnutls_cipher_get_tag_size is commonly used in conjunction with other GNUTLS functions to configure authentication parameters for secure communication protocols.

Related Commands

  • gnutls_cipher_get_key_size
  • gnutls_cipher_get_block_size
  • gnutls_cipher_get_iv_size