60 lines
1.7 KiB
Text
60 lines
1.7 KiB
Text
=pod
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=head1 NAME
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crypto - OpenSSL cryptographic library
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=head1 SYNOPSIS
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=head1 DESCRIPTION
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The OpenSSL B<crypto> library implements a wide range of cryptographic
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algorithms used in various Internet standards. The services provided
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by this library are used by the OpenSSL implementations of SSL, TLS
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and S/MIME, and they have also been used to implement SSH, OpenPGP, and
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other cryptographic standards.
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=head1 OVERVIEW
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B<libcrypto> consists of a number of sub-libraries that implement the
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individual algorithms.
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The functionality includes symmetric encryption, public key
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cryptography and key agreement, certificate handling, cryptographic
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hash functions, cryptographic pseudo-random number generator, and
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various utilities.
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See the individual manual pages for details.
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=head1 NOTES
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Some of the newer functions follow a naming convention using the numbers
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B<0> and B<1>. For example the functions:
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int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev);
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int X509_add1_trust_object(X509 *x, ASN1_OBJECT *obj);
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The B<0> version uses the supplied structure pointer directly
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in the parent and it will be freed up when the parent is freed.
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In the above example B<crl> would be freed but B<rev> would not.
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The B<1> function uses a copy of the supplied structure pointer
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(or in some cases increases its link count) in the parent and
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so both (B<x> and B<obj> above) should be freed up.
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=head1 SEE ALSO
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L<openssl(1)>, L<ssl(3)>
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=cut
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=head1 COPYRIGHT
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Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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