CCHMAC(3) BSD Library Functions Manual CCHMAC(3)

NAME
     CCCCHHmmaaccIInniitt, CCCCHHmmaaccUUppddaattee, CCCCHHmmaaccFFiinnaall, CCCCHHmmaacc - Common HMAC Algorithm
     Interfaces

LLIIBBRRAARRYY
     These functions are found in libSystem.

SYNOPSIS
     ##iinncclluuddee <>

     void
     CCCCHHmmaaccIInniitt(CCHmacContext *ctx, CCHmacAlgorithm algorithm,
         const void *key, sizet keyLength);

     void
     CCCCHHmmaaccUUppddaattee(CCHmacContext *ctx, const void *data, sizet dataLength);

     void
     CCCCHHmmaaccFFiinnaall(CCHmacContext *ctx, void *macOut);

     void
     CCCCHHmmaacc(CCHmacAlgorithm algorithm, const void *key, sizet keyLength,
         const void *data, sizet 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 CCCCHHmmaaccIInniitt() CCCCHHmmaaccUUppddaattee() and CCCCHHmmaaccFFiinnaall() calls to
     complete the HMAC operation.  In addition there is a one shot function,
     CCCCHHmmaacc() that performs a complete HMAC on a single piece of data.

SEE ALSO
     CCMD5(3cc), CCSHA(3cc), CCcrypto(3cc), CCCrypto(3cc)

BSD                             March 22, 2007                             BSD