SM4: Add SM4 block cipher to EVP

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/4552)

1 files changed, 65 insertions, 0 deletions

diff --git a/doc/man3/EVP_sm4.pod b/doc/man3/EVP_sm4.pod
new file mode 100644
index 0000000000..d5c99cd4d9
--- /dev/null
+++ b/doc/man3/EVP_sm4.pod
@@ -0,0 +1,65 @@
+=pod
+
+=head1 NAME
+
+EVP_sm4_cbc,
+EVP_sm4_ecb,
+EVP_sm4_cfb,
+EVP_sm4_ofb,
+EVP_sm4_ctr
+- EVP SM4 cipher
+
+=head1 SYNOPSIS
+
+=for comment generic
+
+ #include <openssl/evp.h>
+
+ const EVP_CIPHER *EVP_ciphername(void)
+
+I<EVP_ciphername> is used a placeholder for any of the described cipher
+functions, such as I<EVP_sm4_cbc>.
+
+=head1 DESCRIPTION
+
+The SM4 blockcipher (GB/T 32907-2016) for EVP.
+
+All modes below use a key length of 128 bits and acts on blocks of 128 bits.
+
+=over 4
+
+=item EVP_sm4_cbc(),
+EVP_sm4_ecb(),
+EVP_sm4_cfb(),
+EVP_sm4_ofb(),
+EVP_sm4_ctr()
+
+The SM4 blockcipher with a 128-bit key in CBC, ECB, CFB, OFB and CTR modes
+respectively.
+
+=back
+
+=head1 RETURN VALUES
+
+These functions return a B<EVP_CIPHER> structure that contains the
+implementation of the symmetric cipher. See L<EVP_CIPHER_meth_new(3)> for
+details of the B<EVP_CIPHER> structure.
+
+=head1 SEE ALSO
+
+L<evp(7)>,
+L<EVP_EncryptInit(3)>,
+L<EVP_CIPHER_meth_new(3)>
+
+=head1 COPYRIGHT
+
+Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2017 Ribose Inc. All Rights Reserved.
+
+Licensed under the OpenSSL license (the "License").  You may not use
+this file except in compliance with the License.  You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut
+