186 lines
5.1 KiB
Groff
186 lines
5.1 KiB
Groff
.\" $NetBSD: openssl_evp.3,v 1.8 2003/07/24 14:16:51 itojun Exp $
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.\" ======================================================================
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.\"
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.IX Title "evp 3"
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.TH evp 3 "0.9.7b" "2002-08-06" "OpenSSL"
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.UC
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.SH "NAME"
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evp \- high-level cryptographic functions
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/evp.h>
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \s-1EVP\s0 library provides a high-level interface to cryptographic
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functions.
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.PP
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\&\fBEVP_Seal\fR\fI...\fR and \fBEVP_Open\fR\fI...\fR provide public key encryption
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and decryption to implement digital \*(L"envelopes\*(R".
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.PP
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The \fBEVP_Sign\fR\fI...\fR and \fBEVP_Verify\fR\fI...\fR functions implement
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digital signatures.
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.PP
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Symmetric encryption is available with the \fBEVP_Encrypt\fR\fI...\fR
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functions. The \fBEVP_Digest\fR\fI...\fR functions provide message digests.
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.PP
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Algorithms are loaded with \fIOpenSSL_add_all_algorithms\fR\|(3).
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.PP
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All the symmetric algorithms (ciphers) and digests can be replaced by \s-1ENGINE\s0
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modules providing alternative implementations. If \s-1ENGINE\s0 implementations of
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ciphers or digests are registered as defaults, then the various \s-1EVP\s0 functions
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will automatically use those implementations automatically in preference to
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built in software implementations. For more information, consult the \fIengine\fR\|(3)
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man page.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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EVP_DigestInit(3),
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EVP_EncryptInit(3),
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EVP_OpenInit(3),
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EVP_SealInit(3),
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EVP_SignInit(3),
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EVP_VerifyInit(3),
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OpenSSL_add_all_algorithms(3),
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engine(3)
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