X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=tfdef.h;h=539ed42da8c9a9cfd646ef93233d3fe29c5e8f1e;hb=HEAD;hp=5450271f12dc9f83989d5e87ecedd0e52d34b656;hpb=4ae16105a9849ffbd2a9bb0e02fa4dfe8b83ebd6;p=tfcrypt.git

diff --git a/tfdef.h b/tfdef.h
index 5450271..539ed42 100644
--- a/tfdef.h
+++ b/tfdef.h
@@ -59,6 +59,11 @@
 #define TF_BLOCK_SIZE (TF_SIZE_UNIT * TF_NR_BLOCK_UNITS)
 #define TF_KEY_SIZE (TF_SIZE_UNIT * TF_NR_KEY_UNITS)
 
+#define TF_NR_TWEAK_UNITS 2
+#define TF_NR_TWEAK_BITS 128
+#define TF_TWEAK_SIZE (TF_SIZE_UNIT * TF_NR_TWEAK_UNITS)
+#define TF_TWEAKEY_SIZE (TF_KEY_SIZE - (2 * TF_TWEAK_SIZE))
+#define TF_NR_TWEAKEY_BITS (TF_NR_KEY_BITS - (2 * TF_NR_TWEAK_BITS))
 #define TF_TWEAK_WORD1 (TF_NR_KEY_UNITS-3)
 #define TF_TWEAK_WORD2 (TF_NR_KEY_UNITS-2)
 #define TF_TWEAK_WORD3 (TF_NR_KEY_UNITS-1)
@@ -87,31 +92,38 @@ static inline void data_to_words(void *p, size_t l)
 #endif
 }
 
-static inline void ctr_inc(TF_UNIT_TYPE *x, size_t l)
+static inline void xor_block(void *dst, const void *src, size_t sz)
 {
-	size_t i;
+	const size_t *sx = (const size_t *)src;
+	const TF_BYTE_TYPE *usx = (const TF_BYTE_TYPE *)src;
+	size_t *dx = (size_t *)dst;
+	TF_BYTE_TYPE *udx = (TF_BYTE_TYPE *)dst;
+	size_t sl = sz;
+
+	for (sl = 0; sl < (sz / sizeof(size_t)); sl++) dx[sl] ^= sx[sl];
+	if (sz - (sl * sizeof(size_t))) for (sl *= sizeof(size_t); sl < sz; sl++) udx[sl] ^= usx[sl];
+}
+
+static inline void ctr_inc(TF_UNIT_TYPE *x, size_t xl)
+{
+	size_t z;
 
-	for (i = 0; i < l; i++) {
-		x[i] = ((x[i] + (TF_UNIT_TYPE)1) & ((TF_UNIT_TYPE)~0));
-		if (x[i]) break;
+	for (z = 0; z < xl; z++) {
+		x[z] = ((x[z] + (TF_UNIT_TYPE)1) & ((TF_UNIT_TYPE)~0));
+		if (x[z]) break;
 	}
 }
 
-static inline void ctr_add(TF_UNIT_TYPE *x, const TF_UNIT_TYPE *y, size_t l)
+static inline void ctr_add(TF_UNIT_TYPE *x, size_t xl, const TF_UNIT_TYPE *y, size_t yl)
 {
-	size_t i, f = 0;
+	size_t z, cf;
 	TF_UNIT_TYPE t;
 
-	for (i = 0; i < l; i++) {
-		t = x[i];
-		x[i] += y[i]; x[i] &= ((TF_UNIT_TYPE)~0);
-		if (x[i] < t) {
-_again:			f++;
-			t = x[f-i];
-			x[f-i]++;
-			if (x[f-i] < t) goto _again;
-			else f = 0;
-		}
+	for (z = 0, cf = 0; z < xl; z++) {
+		t = x[z] + (z >= yl ? (TF_UNIT_TYPE)0 : y[z]) + cf;
+		if (cf) cf = (x[z] >= t ? 1 : 0);
+		else cf = (x[z] > t ? 1 : 0);
+		x[z] = t;
 	}
 }
 
@@ -127,14 +139,17 @@ void tf_decrypt_block(const void *key, void *out, const void *in);
 
 void tf_ctr_set(void *ctr, const void *sctr, size_t sctrsz);
 void tf_ctr_crypt(const void *key, void *ctr, void *out, const void *in, size_t sz);
+
+void tf_tweak_set(void *key, const void *tweak);
+
 void tf_stream_crypt(struct tfe_stream *tfe, void *out, const void *in, size_t sz);
 void tf_ecb_encrypt(const void *key, void *out, const void *in, size_t sz);
 void tf_ecb_decrypt(const void *key, void *out, const void *in, size_t sz);
 void tf_cbc_encrypt(const void *key, void *iv, void *out, const void *in, size_t sz);
 void tf_cbc_decrypt(const void *key, void *iv, void *out, const void *in, size_t sz);
+void tf_pcbc_encrypt(const void *key, void *iv, void *out, const void *in, size_t sz);
+void tf_pcbc_decrypt(const void *key, void *iv, void *out, const void *in, size_t sz);
 void tf_xts_encrypt(const void *keyx, const void *keyz, void *ctr, void *out, const void *in, size_t sz, size_t bpi);
 void tf_xts_decrypt(const void *keyx, const void *keyz, void *ctr, void *out, const void *in, size_t sz, size_t bpi);
-void tf_ocb_encrypt(const void *key, void *ctr, void *out, void *tag, const void *in, size_t sz, size_t bpi);
-void tf_ocb_decrypt(const void *key, void *ctr, void *out, void *tag, const void *in, size_t sz, size_t bpi);
 
 #endif