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evp(3)                              OpenSSL                             evp(3)



NAME
       evp - high-level cryptographic functions

SYNOPSIS
        #include <openssl/evp.h>

DESCRIPTION
       The EVP library provides a high-level interface to cryptographic
       functions.

       EVP_Seal... and EVP_Open... provide public key encryption and
       decryption to implement digital "envelopes".

       The EVP_Sign... and EVP_Verify... functions implement digital
       signatures.

       Symmetric encryption is available with the EVP_Encrypt...  functions.
       The EVP_Digest... functions provide message digests.

       Algorithms are loaded with OpenSSL_add_all_algorithms(3).

       All the symmetric algorithms (ciphers) and digests can be replaced by
       ENGINE modules providing alternative implementations. If ENGINE
       implementations of ciphers or digests are registered as defaults, then
       the various EVP functions will automatically use those implementations
       automatically in preference to built in software implementations. For
       more information, consult the engine(3) man page.

SEE ALSO
       EVP_DigestInit(3), EVP_EncryptInit(3), EVP_OpenInit(3),
       EVP_SealInit(3), EVP_SignInit(3), EVP_VerifyInit(3),
       OpenSSL_add_all_algorithms(3), engine(3)



0.9.7l                            2002-08-05                            evp(3)