CCHmac(3) BSD Library Functions Manual CCHmac(3)
NAME
CCHmacInit, CCHmacUpdate, CCHmacFinal, CCHmac -- Common HMAC Algorithm
Interfaces
LIBRARY
These functions are found in libSystem.
SYNOPSIS
#include <CommonCrypto/CommonHMAC.h>
void
CCHmacInit(CCHmacContext *ctx, CCHmacAlgorithm algorithm,
const void *key, size_t keyLength);
void
CCHmacUpdate(CCHmacContext *ctx, const void *data, size_t dataLength);
void
CCHmacFinal(CCHmacContext *ctx, void *macOut);
void
CCHmac(CCHmacAlgorithm algorithm, const void *key, size_t keyLength,
const void *data, size_t dataLength, void *macOut);
DESCRIPTION
This interface provides access to a number of HMAC algorithms. The fol-
lowing algorithms are available:
kCCHmacAlgSHA1 - HMAC with SHA1 digest
kCCHmacAlgMD5 - HMAC with MD5 digest
kCCHmacAlgSHA256 - HMAC with SHA256 digest
kCCHmacAlgSHA384 - HMAC with SHA384 digest
kCCHmacAlgSHA224 - HMAC with SHA224 digest
kCCHmacAlgSHA512 - HMAC with SHA512 digest
The object declared in this interface, CCHmacContext, provides a handle
for use with the CCHmacInit() CCHmacUpdate() and CCHmacFinal() calls to
complete the HMAC operation. In addition there is a one shot function,
CCHmac() that performs a complete HMAC on a single piece of data.
SEE ALSO
CC_MD5(3), CC_SHA(3), CC_crypto(3), CCCrypto(3)
BSD March 22, 2007 BSD
Mac OS X 10.6 - Generated Thu Sep 17 20:10:53 CDT 2009