update

crypto/evp/e_sms4.c

@@ -0,0 +1,37 @@
+/* crypto/evp/e_sms4.c */
+#include <stdio.h>
+#include "cryptlib.h"
+
+#ifndef OPENSSL_NO_SMS4
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include "evp_locl.h"
+#include <openssl/sms4.h>
+
+static int sms4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+			 const unsigned char *iv,int enc);
+
+typedef struct
+	{
+	sms4_key_t ks;
+	} EVP_SMS4_KEY;
+
+
+IMPLEMENT_BLOCK_CIPHER(sms4, ks, sms4, EVP_SMS4_KEY, NID_sms4,
+		       16, 16, 16, 128, 0, sms4_init_key, 0, 0, 0, 0)
+
+static int sms4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+			 const unsigned char *iv, int enc)
+	{
+	if(!enc) {
+		if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) enc = 1;
+		else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE) enc = 1;  //encrypt key == decrypt key
+	}
+	if (enc)
+                sms4_set_encrypt_key(ctx->cipher_data, key);
+	else            //ecb, cbc
+		sms4_set_decrypt_key(ctx->cipher_data, key);
+	return 1;
+	}
+
+#endif