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141 .TH evp 3 "0.9.7a" "2003-02-19" "OpenSSL"
144 evp \- high-level cryptographic functions
146 .IX Header "SYNOPSIS"
148 \& #include <openssl/evp.h>
151 .IX Header "DESCRIPTION"
152 The \s-1EVP\s0 library provides a high-level interface to cryptographic
155 \&\fBEVP_Seal\fR\fI...\fR and \fBEVP_Open\fR\fI...\fR provide public key encryption
156 and decryption to implement digital \*(L"envelopes\*(R".
158 The \fBEVP_Sign\fR\fI...\fR and \fBEVP_Verify\fR\fI...\fR functions implement
161 Symmetric encryption is available with the \fBEVP_Encrypt\fR\fI...\fR
162 functions. The \fBEVP_Digest\fR\fI...\fR functions provide message digests.
164 Algorithms are loaded with \fIOpenSSL_add_all_algorithms\fR\|(3).
166 All the symmetric algorithms (ciphers) and digests can be replaced by \s-1ENGINE\s0
167 modules providing alternative implementations. If \s-1ENGINE\s0 implementations of
168 ciphers or digests are registered as defaults, then the various \s-1EVP\s0 functions
169 will automatically use those implementations automatically in preference to
170 built in software implementations. For more information, consult the \fIengine\fR\|(3)
173 .IX Header "SEE ALSO"
180 OpenSSL_add_all_algorithms(3),