gnutls_crypto_register_digest - Linux

Overview

gnutls_crypto_register_digest registers a digest algorithm with the GNUTLS crypto library. This enables applications to use the digest algorithm for cryptographic operations like hashing and digital signatures.

Syntax

gnutls_crypto_register_digest(
    int digest_id,
    gnutls_digest_func_t digest_func,
    unsigned int digest_length,
    int digest_size,
    int digest_test_size,
    int digest_truncate_size
);

Options/Flags

| Option | Description |
|—|—|
| digest_id | The GNUTLS ID of the digest algorithm. |
| digest_func | The function that computes the digest. |
| digest_length | The length of the digest in bits. |
| digest_size | The size of the digest in bytes. |
| digest_test_size | The size of the test data for the digest. |
| digest_truncate_size | The size of the truncated digest. |

Examples

Register the SHA-256 digest algorithm:

gnutls_crypto_register_digest(
    GNUTLS_DIG_SHA256,
    gnutls_sha256_mac,
    256,
    32,
    0,
    0
);

Common Issues

• Ensure that the digest algorithm is supported by the underlying cryptographic library.
• Verify that the digest length and size parameters are consistent.
• Check for compatibility issues when using the digest algorithm with other libraries or applications.

Integration

gnutls_crypto_register_digest can be used in conjunction with other GNUTLS functions to create secure communication channels, verify digital signatures, and perform various cryptographic operations.

Related Commands

• gnutls_crypto_register_cipher
• gnutls_crypto_register_mac
• gnutls_crypto_register_key_exchange