Do no try to pretend we're at the end of anything unless we're at the end
[openssl.git] / crypto / evp / e_xcbc_d.c
index 7568fad..cb82815 100644 (file)
  * [including the GNU Public Licence.]
  */
 
-#ifndef NO_DES
 #include <stdio.h>
 #include "cryptlib.h"
+
+#ifndef OPENSSL_NO_DES
+
 #include <openssl/evp.h>
 #include <openssl/objects.h>
+#include <openssl/des.h>
+
+static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                            const unsigned char *iv,int enc);
+static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                          const unsigned char *in, unsigned int inl);
+
 
-static void desx_cbc_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
-       unsigned char *iv,int enc);
-static void desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
-       unsigned char *in, unsigned int inl);
-static EVP_CIPHER d_xcbc_cipher=
+typedef struct
+    {
+    DES_key_schedule ks;/* key schedule */
+    DES_cblock inw;
+    DES_cblock outw;
+    } DESX_CBC_KEY;
+
+#define data(ctx) ((DESX_CBC_KEY *)(ctx)->cipher_data)
+
+static const EVP_CIPHER d_xcbc_cipher=
        {
        NID_desx_cbc,
        8,24,8,
+       EVP_CIPH_CBC_MODE,
        desx_cbc_init_key,
        desx_cbc_cipher,
        NULL,
-       sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
-               sizeof((((EVP_CIPHER_CTX *)NULL)->c.desx_cbc)),
+       sizeof(DESX_CBC_KEY),
        EVP_CIPHER_set_asn1_iv,
        EVP_CIPHER_get_asn1_iv,
+       NULL
        };
 
-EVP_CIPHER *EVP_desx_cbc(void)
+const EVP_CIPHER *EVP_desx_cbc(void)
        {
        return(&d_xcbc_cipher);
        }
        
-static void desx_cbc_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
-            unsigned char *iv, int enc)
+static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                            const unsigned char *iv, int enc)
        {
-       des_cblock *deskey = (des_cblock *)key;
+       DES_cblock *deskey = (DES_cblock *)key;
+
+       DES_set_key_unchecked(deskey,&data(ctx)->ks);
+       memcpy(&data(ctx)->inw[0],&key[8],8);
+       memcpy(&data(ctx)->outw[0],&key[16],8);
 
-       if (iv != NULL)
-               memcpy(&(ctx->oiv[0]),iv,8);
-       memcpy(&(ctx->iv[0]),&(ctx->oiv[0]),8);
-       if (deskey != NULL)
-               {
-               des_set_key_unchecked(deskey,ctx->c.desx_cbc.ks);
-               memcpy(&(ctx->c.desx_cbc.inw[0]),&(key[8]),8);
-               memcpy(&(ctx->c.desx_cbc.outw[0]),&(key[16]),8);
-               }
+       return 1;
        }
 
-static void desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
-            unsigned char *in, unsigned int inl)
+static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                          const unsigned char *in, unsigned int inl)
        {
-       des_xcbc_encrypt(in,out,inl,ctx->c.desx_cbc.ks,
-               (des_cblock *)&(ctx->iv[0]),
-               &ctx->c.desx_cbc.inw,
-               &ctx->c.desx_cbc.outw,
-               ctx->encrypt);
+       DES_xcbc_encrypt(in,out,inl,&data(ctx)->ks,
+                        (DES_cblock *)&(ctx->iv[0]),
+                        &data(ctx)->inw,
+                        &data(ctx)->outw,
+                        ctx->encrypt);
+       return 1;
        }
 #endif