*
*/
-#include "silcincludes.h"
+#include "silc.h"
+#include "blowfish_internal.h"
#include "blowfish.h"
+/*
+ * SILC Crypto API for Blowfish
+ */
+
+/* Sets the key for the cipher. */
+
+SILC_CIPHER_API_SET_KEY(blowfish_cbc)
+{
+ blowfish_set_key((BlowfishContext *)context, (unsigned char *)key, keylen);
+ return TRUE;
+}
+
+/* Sets IV for the cipher. */
+
+SILC_CIPHER_API_SET_IV(blowfish_cbc)
+{
+
+}
+
+/* Returns the size of the cipher context. */
+
+SILC_CIPHER_API_CONTEXT_LEN(blowfish_cbc)
+{
+ return sizeof(BlowfishContext);
+}
+
+/* Encrypts with the cipher in CBC mode. Source and destination buffers
+ maybe one and same. */
+
+SILC_CIPHER_API_ENCRYPT(blowfish_cbc)
+{
+ SilcUInt32 tiv[4];
+ int i;
+
+ SILC_CBC_GET_IV(tiv, iv);
+
+ SILC_CBC_ENC_PRE(tiv, src);
+ blowfish_encrypt((BlowfishContext *)context, tiv, tiv, 16);
+ SILC_CBC_ENC_POST(tiv, dst, src);
+
+ for (i = 16; i < len; i += 16) {
+ SILC_CBC_ENC_PRE(tiv, src);
+ blowfish_encrypt((BlowfishContext *)context, tiv, tiv, 16);
+ SILC_CBC_ENC_POST(tiv, dst, src);
+ }
+
+ SILC_CBC_PUT_IV(tiv, iv);
+
+ return TRUE;
+}
+
+/* Decrypts with the cipher in CBC mode. Source and destination buffers
+ maybe one and same. */
+
+SILC_CIPHER_API_DECRYPT(blowfish_cbc)
+{
+ SilcUInt32 tmp[4], tmp2[4], tiv[4];
+ int i;
+
+ SILC_CBC_GET_IV(tiv, iv);
+
+ SILC_CBC_DEC_PRE(tmp, src);
+ blowfish_decrypt((BlowfishContext *)context, tmp, tmp2, 16);
+ SILC_CBC_DEC_POST(tmp2, dst, src, tmp, tiv);
+
+ for (i = 16; i < len; i += 16) {
+ SILC_CBC_DEC_PRE(tmp, src);
+ blowfish_decrypt((BlowfishContext *)context, tmp, tmp2, 16);
+ SILC_CBC_DEC_POST(tmp2, dst, src, tmp, tiv);
+ }
+
+ SILC_CBC_PUT_IV(tiv, iv);
+
+ return TRUE;
+}
+
static u32 bf_pbox[16 + 2] =
{
0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6,
};
-/*
+/*
* Round loop unrolling macros, S is a pointer to a S-Box array
- * organized in 4 uint32s at a row.
+ * organized in 4 SilcUInt32s at a row.
*/
#define GET32_3(x) (((x) & 0xff))
/*
* The blowfish encipher, processes 64-bit blocks.
- * NOTE: This function MUSTN'T respect endianess
+ * NOTE: This function MUSTN'T respect endianess
*/
int blowfish_encrypt(BlowfishContext *ctx,
for (i = 0; i < 16 + 2; i += 2)
{
blowfish_encrypt(ctx, data, data, 8);
-
+
P[i] = data[0];
P[i + 1] = data[1];
}