CFB DES sync-up with FIPS branch.

1 files changed, 35 insertions, 2 deletions

diff --git a/crypto/evp/e_des.c b/crypto/evp/e_des.c
index 92f6ebc343..f2554ecc6a 100644
--- a/crypto/evp/e_des.c
+++ b/crypto/evp/e_des.c
@@ -92,20 +92,53 @@ static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 	return 1;
 }
 
-static int des_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
-			  const unsigned char *in, unsigned int inl)
+static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+			    const unsigned char *in, unsigned int inl)
 {
 	DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
 			  (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
 	return 1;
 }
 
+/* Although we have a CFB-r implementation for DES, it doesn't pack the right
+   way, so wrap it here */
+static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+			   const unsigned char *in, unsigned int inl)
+    {
+    unsigned int n;
+    unsigned char c[1],d[1];
+
+    for(n=0 ; n < inl ; ++n)
+	{
+	c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
+	DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv,
+			ctx->encrypt);
+	out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8));
+	}
+    return 1;
+    }
+
+static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+			   const unsigned char *in, unsigned int inl)
+    {
+    DES_cfb_encrypt(in,out,8,inl,ctx->cipher_data,(DES_cblock *)ctx->iv,
+		    ctx->encrypt);
+    return 1;
+    }
+
 BLOCK_CIPHER_defs(des, DES_key_schedule, NID_des, 8, 8, 8, 64,
 			0, des_init_key, NULL,
 			EVP_CIPHER_set_asn1_iv,
 			EVP_CIPHER_get_asn1_iv,
 			NULL)
 
+BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,1,0,des_init_key,NULL,
+		     EVP_CIPHER_set_asn1_iv,
+		     EVP_CIPHER_get_asn1_iv,NULL)
+
+BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,8,0,des_init_key,NULL,
+		     EVP_CIPHER_set_asn1_iv,
+		     EVP_CIPHER_get_asn1_iv,NULL)
 
 static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 			const unsigned char *iv, int enc)