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crypto(3)                           OpenSSL                          crypto(3)

N
       crypto - OpenSSL cryptographic library

S
D
       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.

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

       The functionality includes symmetric encryption, public key cryptogra-
       phy and key agreement, certificate handling, cryptographic hash func-
       tions 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), OPENSSL_VERSION_NUMBER(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), txt_db(3)

N
       Some of the newer functions follow a naming convention using the num-
       bers 00 and 11. For example the functions:

        int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev);
        int X509_add1_trust_object(X509 *x, ASN1_OBJECT *obj);

       The 00 version uses the supplied structure pointer directly in the par-
       ent 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.

S
       openssl(1), ssl(3)

3rd Berkeley Distribution           0.9.7d                           crypto(3)

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