1*4724848cSchristos=pod 2*4724848cSchristos 3*4724848cSchristos=head1 NAME 4*4724848cSchristos 5*4724848cSchristoscrypto - OpenSSL cryptographic library 6*4724848cSchristos 7*4724848cSchristos=head1 SYNOPSIS 8*4724848cSchristos 9*4724848cSchristosSee the individual manual pages for details. 10*4724848cSchristos 11*4724848cSchristos=head1 DESCRIPTION 12*4724848cSchristos 13*4724848cSchristosThe OpenSSL B<crypto> library implements a wide range of cryptographic 14*4724848cSchristosalgorithms used in various Internet standards. The services provided 15*4724848cSchristosby this library are used by the OpenSSL implementations of SSL, TLS 16*4724848cSchristosand S/MIME, and they have also been used to implement SSH, OpenPGP, and 17*4724848cSchristosother cryptographic standards. 18*4724848cSchristos 19*4724848cSchristosB<libcrypto> consists of a number of sub-libraries that implement the 20*4724848cSchristosindividual algorithms. 21*4724848cSchristos 22*4724848cSchristosThe functionality includes symmetric encryption, public key 23*4724848cSchristoscryptography and key agreement, certificate handling, cryptographic 24*4724848cSchristoshash functions, cryptographic pseudo-random number generator, and 25*4724848cSchristosvarious utilities. 26*4724848cSchristos 27*4724848cSchristos=head1 NOTES 28*4724848cSchristos 29*4724848cSchristosSome of the newer functions follow a naming convention using the numbers 30*4724848cSchristosB<0> and B<1>. For example the functions: 31*4724848cSchristos 32*4724848cSchristos int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev); 33*4724848cSchristos int X509_add1_trust_object(X509 *x, const ASN1_OBJECT *obj); 34*4724848cSchristos 35*4724848cSchristosThe B<0> version uses the supplied structure pointer directly 36*4724848cSchristosin the parent and it will be freed up when the parent is freed. 37*4724848cSchristosIn the above example B<crl> would be freed but B<rev> would not. 38*4724848cSchristos 39*4724848cSchristosThe B<1> function uses a copy of the supplied structure pointer 40*4724848cSchristos(or in some cases increases its link count) in the parent and 41*4724848cSchristosso both (B<x> and B<obj> above) should be freed up. 42*4724848cSchristos 43*4724848cSchristos=head1 RETURN VALUES 44*4724848cSchristos 45*4724848cSchristosSee the individual manual pages for details. 46*4724848cSchristos 47*4724848cSchristos=head1 SEE ALSO 48*4724848cSchristos 49*4724848cSchristosL<openssl(1)>, L<ssl(7)> 50*4724848cSchristos 51*4724848cSchristos=head1 COPYRIGHT 52*4724848cSchristos 53*4724848cSchristosCopyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. 54*4724848cSchristos 55*4724848cSchristosLicensed under the OpenSSL license (the "License"). You may not use 56*4724848cSchristosthis file except in compliance with the License. You can obtain a copy 57*4724848cSchristosin the file LICENSE in the source distribution or at 58*4724848cSchristosL<https://www.openssl.org/source/license.html>. 59*4724848cSchristos 60*4724848cSchristos=cut 61