| =pod |
| |
| =head1 NAME |
| |
| evp - high-level cryptographic functions |
| |
| =head1 SYNOPSIS |
| |
| #include <openssl/evp.h> |
| |
| =head1 DESCRIPTION |
| |
| The EVP library provides a high-level interface to cryptographic |
| functions. |
| |
| B<EVP_Seal>I<...> and B<EVP_Open>I<...> provide public key encryption |
| and decryption to implement digital "envelopes". |
| |
| The B<EVP_Sign>I<...> and B<EVP_Verify>I<...> functions implement |
| digital signatures. |
| |
| Symmetric encryption is available with the B<EVP_Encrypt>I<...> |
| functions. The B<EVP_Digest>I<...> 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. |
| |
| =head1 SEE ALSO |
| |
| L<EVP_DigestInit(3)|EVP_DigestInit(3)>, |
| L<EVP_EncryptInit(3)|EVP_EncryptInit(3)>, |
| L<EVP_OpenInit(3)|EVP_OpenInit(3)>, |
| L<EVP_SealInit(3)|EVP_SealInit(3)>, |
| L<EVP_SignInit(3)|EVP_SignInit(3)>, |
| L<EVP_VerifyInit(3)|EVP_VerifyInit(3)>, |
| L<OpenSSL_add_all_algorithms(3)|OpenSSL_add_all_algorithms(3)>, |
| L<engine(3)|engine(3)> |
| |
| =cut |
