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文件: /usr/local/openssl/share/man/man7/crypto.7
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.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" crypto \- OpenSSL cryptographic library .SH "SYNOPSIS" .IX Header "SYNOPSIS" See the individual manual pages for details. .SH "DESCRIPTION" .IX Header "DESCRIPTION" The OpenSSL \fBcrypto\fR library implements a wide range of cryptographic algorithms used in various Internet standards. The services provided by this library are used by the OpenSSL implementations of \s-1SSL, TLS\s0 and S/MIME, and they have also been used to implement \s-1SSH,\s0 OpenPGP, and other cryptographic standards. .PP \&\fBlibcrypto\fR consists of a number of sub-libraries that implement the individual algorithms. .PP The functionality includes symmetric encryption, public key cryptography and key agreement, certificate handling, cryptographic hash functions, cryptographic pseudo-random number generator, and various utilities. .SH "NOTES" .IX Header "NOTES" Some of the newer functions follow a naming convention using the numbers \&\fB0\fR and \fB1\fR. For example the functions: .PP .Vb 2 \& int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev); \& int X509_add1_trust_object(X509 *x, const ASN1_OBJECT *obj); .Ve .PP The \fB0\fR version uses the supplied structure pointer directly in the parent and it will be freed up when the parent is freed. In the above example \fBcrl\fR would be freed but \fBrev\fR would not. .PP The \fB1\fR function uses a copy of the supplied structure pointer (or in some cases increases its link count) in the parent and so both (\fBx\fR and \fBobj\fR above) should be freed up. .SH "RETURN VALUES" .IX Header "RETURN VALUES" See the individual manual pages for details. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fIopenssl\fR\|(1), \fIssl\fR\|(7) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2000\-2016 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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