CCcrypto(3cc) LOCAL CCcrypto(3cc)

NAME
     CCoommmmoonn CCrryyppttoo - libSystem digest library

DESCRIPTION
     The libSystem CCoommmmoonn CCrryyppttoo library implements a wide range of crypto-
     graphic algorithms used in various Internet standards. The services pro-
     vided by this library are used by the CDSA implementations of SSL, TLS
     and S/MIME.

OOVVEERRVVIIEEWW
     lliibbSSyysstteemm contains the Common Crypto collection of algorithms. Digest and
     encryption algorithms contained in this library are optimized for speed.
     The algorithms have been collected from various sources and chosen for
     their performance characteristics.  Since libSystem is linked into all
     executables it is preferable for applications to use these functions
     rather than implementing their own versions.

NNOOTTEESS
     To use the digest functions with existing code which uses the correspond-
     ing openssl functions, #define the symbol COMMONDIGESTFOROPENSSL in
     your client code (BEFORE including  ).

     You can *NOT* mix and match functions operating on a given data type from
     the two implementations; i.e., if you do a CCCCMMDD55IInniitt() on a CCMD5CTX
     object, do not assume that you can do an openssl-style MMDD55UUppddaattee() on
     that same context.

     The interfaces to the encryption and HMAC algorithms have a calling
     interface that is different from that provided by OpenSSL.

SEE ALSO
     CCMD5(3cc), CCSHA(3cc), CCHmac(3cc), CCCryptor(3cc)

BSD                              April 5, 2007                             BSD