HMAC

Name

HMAC -- cryptographic message authentication.

Synopsis

#include <hmac.h>


void        hmac_md5                        (unsigned char *data,
                                             int data_len,
                                             unsigned char *key,
                                             int key_len,
                                             unsigned char digest[16]);

Description

HMAC is a cryptographic mechanism for message authentication described in RFC2104. It allows a sender and receiver with a shared cryptographic key to verify the authenticity of a message.

Details

hmac_md5 ()

void        hmac_md5                        (unsigned char *data,
                                             int data_len,
                                             unsigned char *key,
                                             int key_len,
                                             unsigned char digest[16]);

Computes MD5 digest of data using key key.

`data` :	pointer to data stream.
`data_len` :	length of data stream in bytes.
`key` :	pointer to authentication key.
`key_len` :	length of authentication key in bytes.
`digest` :	digest to be filled in.

See Also

RFC2104 - HMAC: Keyed-Hashing for Message Authentication