crypto(3) OpenSSL crypto(3)

NAME
       crypto - OpenSSL cryptographic library

SYNOPSIS
DESCRIPTION
       The OpenSSL ccrryyppttoo library implements a wide range of cryptographic
       algorithms used in various Internet standards. The services provided by
       this library are used by the OpenSSL implementations of SSL, TLS and
       S/MIME, and they have also been used to implement SSH, OpenPGP, and
       other cryptographic standards.

OOVVEERRVVIIEEWW
       lliibbccrryyppttoo consists of a number of sub-libraries that implement the
       individual algorithms.

       The functionality includes symmetric encryption, public key
       cryptography and key agreement, certificate handling, cryptographic
       hash functions and a cryptographic pseudo-random number generator.

       SYMMETRIC CIPHERS
           blowfish(3), cast(3), des(3), idea(3), rc2(3), rc4(3), rc5(3)

       PUBLIC KEY CRYPTOGRAPHY AND KEY AGREEMENT
           dsa(3), dh(3), rsa(3)

       CERTIFICATES
           x509(3), x509v3(3)

       AUTHENTICATION CODES, HASH FUNCTIONS
           hmac(3), md2(3), md4(3), md5(3), mdc2(3), ripemd(3), sha(3)

       AUXILIARY FUNCTIONS
           err(3), threads(3), rand(3), OPENSSLVERSIONNUMBER(3)

       INPUT/OUTPUT, DATA ENCODING
           asn1(3), bio(3), evp(3), pem(3), pkcs7(3), pkcs12(3)

       INTERNAL FUNCTIONS
           bn(3), buffer(3), lhash(3), objects(3), stack(3), txtdb(3)

NNOOTTEESS
       Some of the newer functions follow a naming convention using the
       numbers 00 and 11. For example the functions:

        int X509CRLadd0revoked(X509CRL *crl, X509REVOKED *rev);
        int X509add1trustobject(X509 *x, ASN1OBJECT *obj);

       The 00 version uses the supplied structure pointer directly in the
       parent and it will be freed up when the parent is freed.  In the above
       example ccrrll would be freed but rreevv would not.

       The 11 function uses a copy of the supplied structure pointer (or in
       some cases increases its link count) in the parent and so both (xx and
       oobbjj above) should be freed up.

SEE ALSO
       openssl(1), ssl(3)



0.9.7l                            2002-10-09                         crypto(3)