The B<EVP_PKEY>I<...> functions provide a high level interface to
asymmetric algorithms. To create a new EVP_PKEY see
-L<EVP_PKEY_new(3)|EVP_PKEY_new(3)>. EVP_PKEYs can be associated
+L<EVP_PKEY_new(3)>. EVP_PKEYs can be associated
with a private key of a particular algorithm by using the functions
-described on the L<EVP_PKEY_set1_RSA(3)|EVP_PKEY_set1_RSA(3)> page, or
-new keys can be generated using L<EVP_PKEY_keygen(3)|EVP_PKEY_keygen(3)>.
-EVP_PKEYs can be compared using L<EVP_PKEY_cmp(3)|EVP_PKEY_cmp(3)>, or printed using
-L<EVP_PKEY_print_private(3)|EVP_PKEY_print_private(3)>.
+described on the L<EVP_PKEY_set1_RSA(3)> page, or
+new keys can be generated using L<EVP_PKEY_keygen(3)>.
+EVP_PKEYs can be compared using L<EVP_PKEY_cmp(3)>, or printed using
+L<EVP_PKEY_print_private(3)>.
The EVP_PKEY functions support the full range of asymmetric algorithm operations:
=over
-=item For key agreement see L<EVP_PKEY_derive(3)|EVP_PKEY_derive(3)>
+=item For key agreement see L<EVP_PKEY_derive(3)>
-=item For signing and verifying see L<EVP_PKEY_sign(3)|EVP_PKEY_sign(3)>,
-L<EVP_PKEY_verify(3)|EVP_PKEY_verify(3)> and L<EVP_PKEY_verify_recover(3)|EVP_PKEY_verify_recover(3)>.
+=item For signing and verifying see L<EVP_PKEY_sign(3)>,
+L<EVP_PKEY_verify(3)> and L<EVP_PKEY_verify_recover(3)>.
However, note that
these functions do not perform a digest of the data to be signed. Therefore
-normally you would use the L<B<EVP_DigestSign>I<...>|EVP_DigestSignInit(3)>
+normally you would use the L<EVP_DigestSignInit(3)>
functions for this purpose.
-=item For encryption and decryption see L<EVP_PKEY_encrypt(3)|EVP_PKEY_encrypt(3)>
-and L<EVP_PKEY_decrypt(3)|EVP_PKEY_decrypt(3)> respectively. However, note that
+=item For encryption and decryption see L<EVP_PKEY_encrypt(3)>
+and L<EVP_PKEY_decrypt(3)> respectively. However, note that
these functions perform encryption and decryption only. As public key
encryption is an expensive operation, normally you would wrap
-an encrypted message in a "digital envelope" using the L<B<EVP_Seal>I<...>|EVP_SealInit(3)> and
-L<B<EVP_Open>I<...>|EVP_OpenInit(3)> functions.
+an encrypted message in a "digital envelope" using the L<EVP_SealInit(3)> and
+L<EVP_OpenInit(3)> functions.
=back
-The L<EVP_BytesToKey(3)|EVP_BytesToKey(3)> function provides some limited support for password
+The L<EVP_BytesToKey(3)> function provides some limited support for password
based encryption. Careful selection of the parameters will provide a PKCS#5 PBKDF1 compatible
implementation. However, new applications should not typically use this (preferring, for example,
PBKDF2 from PCKS#5).
-Algorithms are loaded with L<OpenSSL_add_all_algorithms(3)|OpenSSL_add_all_algorithms(3)>.
-
All the symmetric algorithms (ciphers), digests and asymmetric algorithms
-(public key algorithms) can be replaced by L<ENGINE|engine(3)> modules providing alternative
+(public key algorithms) can be replaced by L<engine(3)> 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
=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_DigestSignInit(3)|EVP_DigestSignInit(3)>,
-L<EVP_SignInit(3)|EVP_SignInit(3)>,
-L<EVP_VerifyInit(3)|EVP_VerifyInit(3)>,
-L<EVP_PKEY_new(3)|EVP_PKEY_new(3)>,
-L<EVP_PKEY_set1_RSA(3)|EVP_PKEY_set1_RSA(3)>,
-L<EVP_PKEY_keygen(3)|EVP_PKEY_keygen(3)>,
-L<EVP_PKEY_print_private(3)|EVP_PKEY_print_private(3)>,
-L<EVP_PKEY_decrypt(3)|EVP_PKEY_decrypt(3)>,
-L<EVP_PKEY_encrypt(3)|EVP_PKEY_encrypt(3)>,
-L<EVP_PKEY_sign(3)|EVP_PKEY_sign(3)>,
-L<EVP_PKEY_verify(3)|EVP_PKEY_verify(3)>,
-L<EVP_PKEY_verify_recover(3)|EVP_PKEY_verify_recover(3)>,
-L<EVP_PKEY_derive(3)|EVP_PKEY_derive(3)>,
-L<EVP_BytesToKey(3)|EVP_BytesToKey(3)>,
-L<OpenSSL_add_all_algorithms(3)|OpenSSL_add_all_algorithms(3)>,
-L<engine(3)|engine(3)>
+L<EVP_DigestInit(3)>,
+L<EVP_EncryptInit(3)>,
+L<EVP_OpenInit(3)>,
+L<EVP_SealInit(3)>,
+L<EVP_DigestSignInit(3)>,
+L<EVP_SignInit(3)>,
+L<EVP_VerifyInit(3)>,
+L<EVP_PKEY_new(3)>,
+L<EVP_PKEY_set1_RSA(3)>,
+L<EVP_PKEY_keygen(3)>,
+L<EVP_PKEY_print_private(3)>,
+L<EVP_PKEY_decrypt(3)>,
+L<EVP_PKEY_encrypt(3)>,
+L<EVP_PKEY_sign(3)>,
+L<EVP_PKEY_verify(3)>,
+L<EVP_PKEY_verify_recover(3)>,
+L<EVP_PKEY_derive(3)>,
+L<EVP_BytesToKey(3)>,
+L<engine(3)>
=cut
projects / openssl.git / blobdiff