183 lines
5.7 KiB
Groff
Executable File
183 lines
5.7 KiB
Groff
Executable File
.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
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.\" ========================================================================
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.\"
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.IX Title "CRYPTO 7"
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.TH CRYPTO 7 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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crypto \- OpenSSL cryptographic library
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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See the individual manual pages for details.
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The OpenSSL crypto library (\f(CW\*(C`libcrypto\*(C'\fR) implements a wide range of
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cryptographic algorithms used in various Internet standards. The services
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provided by this library are used by the OpenSSL implementations of \s-1SSL\s0, \s-1TLS\s0
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and S/MIME, and they have also been used to implement \s-1SSH\s0, OpenPGP, and
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other cryptographic standards.
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.PP
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\&\f(CW\*(C`libcrypto\*(C'\fR consists of a number of sub-libraries that implement the
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individual algorithms.
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.PP
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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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.SH "NOTES"
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.IX Header "NOTES"
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Some of the newer functions follow a naming convention using the numbers
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\&\fB0\fR and \fB1\fR. For example the functions:
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.PP
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.Vb 2
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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, const ASN1_OBJECT *obj);
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.Ve
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.PP
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The \fB0\fR 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 \fIcrl\fR would be freed but \fIrev\fR would not.
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.PP
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The \fB1\fR 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 (\fIx\fR and \fIobj\fR above) should be freed up.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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See the individual manual pages for details.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIopenssl\fR\|(1), \fIssl\fR\|(7)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2016 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). 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 \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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