1CRYPTO(7)                           OpenSSL                          CRYPTO(7)
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NAME

6       crypto - OpenSSL cryptographic library
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SYNOPSIS

9       See the individual manual pages for details.
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DESCRIPTION

12       The OpenSSL crypto library implements a wide range of cryptographic
13       algorithms used in various Internet standards. The services provided by
14       this library are used by the OpenSSL implementations of SSL, TLS and
15       S/MIME, and they have also been used to implement SSH, OpenPGP, and
16       other cryptographic standards.
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18       libcrypto consists of a number of sub-libraries that implement the
19       individual algorithms.
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21       The functionality includes symmetric encryption, public key
22       cryptography and key agreement, certificate handling, cryptographic
23       hash functions, cryptographic pseudo-random number generator, and
24       various utilities.
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NOTES

27       Some of the newer functions follow a naming convention using the
28       numbers 0 and 1. For example the functions:
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30        int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev);
31        int X509_add1_trust_object(X509 *x, const ASN1_OBJECT *obj);
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33       The 0 version uses the supplied structure pointer directly in the
34       parent and it will be freed up when the parent is freed.  In the above
35       example crl would be freed but rev would not.
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37       The 1 function uses a copy of the supplied structure pointer (or in
38       some cases increases its link count) in the parent and so both (x and
39       obj above) should be freed up.
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RETURN VALUES

42       See the individual manual pages for details.
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SEE ALSO

45       openssl(1), ssl(7)
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48       Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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50       Licensed under the OpenSSL license (the "License").  You may not use
51       this file except in compliance with the License.  You can obtain a copy
52       in the file LICENSE in the source distribution or at
53       <https://www.openssl.org/source/license.html>.
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571.1.1g                            2020-04-23                         CRYPTO(7)
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