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crypto(3)			    OpenSSL			     crypto(3)

NAME
       crypto -	OpenSSL	cryptographic library

SYNOPSIS
DESCRIPTION
       The OpenSSL crypto library implements a wide range of cryptographic al-
       gorithms	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.

OVERVIEW
       libcrypto consists of a number of sub-libraries that implement the in-
       dividual	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)

NOTES
       Some of the newer functions follow a naming convention using the	num-
       bers 0 and 1. 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 0 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 ex-
       ample crl would be freed	but rev	would not.

       The 1 function uses a copy of the supplied structure pointer (or	in
       some cases increases its	link count) in the parent and so both (x and
       obj above) should be freed up.

SEE ALSO
       openssl(1), ssl(3)

0.9.7d				  2005-02-24			     crypto(3)

NAME | SYNOPSIS | DESCRIPTION | OVERVIEW | NOTES | SEE ALSO

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