hasher: Initial commit

CMakeLists.txt

@@ -7,6 +7,7 @@ set(SOURCES
     ripemd160.c
     sha2.c
     sha3.c
+    hasher.c
     aes/aescrypt.c aes/aeskey.c aes/aestab.c aes/aes_modes.c
     ed25519-donna/curve25519-donna-32bit.c ed25519-donna/curve25519-donna-helpers.c ed25519-donna/modm-donna-32bit.c
     ed25519-donna/ed25519-donna-basepoint-table.c ed25519-donna/ed25519-donna-32bit-tables.c ed25519-donna/ed25519-donna-impl-base.c

Makefile

@@ -42,6 +42,7 @@ SRCS  += script.c
 SRCS  += ripemd160.c
 SRCS  += sha2.c
 SRCS  += sha3.c
+SRCS  += hasher.c
 SRCS  += aes/aescrypt.c aes/aeskey.c aes/aestab.c aes/aes_modes.c
 SRCS  += ed25519-donna/curve25519-donna-32bit.c ed25519-donna/curve25519-donna-helpers.c ed25519-donna/modm-donna-32bit.c
 SRCS  += ed25519-donna/ed25519-donna-basepoint-table.c ed25519-donna/ed25519-donna-32bit-tables.c ed25519-donna/ed25519-donna-impl-base.c

hasher.c

@@ -0,0 +1,66 @@
+/**
+ * Copyright (c) 2017 Saleem Rashid
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "hasher.h"
+
+void hasher_Init(Hasher *hasher, HasherType type) {
+	hasher->type = type;
+
+	switch (hasher->type) {
+	case HASHER_SHA2:
+		sha256_Init(&hasher->ctx.sha2);
+		break;
+	}
+}
+
+void hasher_Reset(Hasher *hasher) {
+	hasher_Init(hasher, hasher->type);
+}
+
+void hasher_Update(Hasher *hasher, const uint8_t *data, size_t length) {
+	switch (hasher->type) {
+	case HASHER_SHA2:
+		sha256_Update(&hasher->ctx.sha2, data, length);
+		break;
+	}
+}
+
+void hasher_Final(Hasher *hasher, uint8_t hash[HASHER_DIGEST_LENGTH]) {
+	switch (hasher->type) {
+	case HASHER_SHA2:
+		sha256_Final(&hasher->ctx.sha2, hash);
+		break;
+	}
+}
+
+void hasher_Double(Hasher *hasher, uint8_t hash[HASHER_DIGEST_LENGTH]) {
+	hasher_Final(hasher, hash);
+	hasher_Raw(hasher->type, hash, HASHER_DIGEST_LENGTH, hash);
+}
+
+void hasher_Raw(HasherType type, const uint8_t *data, size_t length, uint8_t hash[HASHER_DIGEST_LENGTH]) {
+	Hasher hasher;
+
+	hasher_Init(&hasher, type);
+	hasher_Update(&hasher, data, length);
+	hasher_Final(&hasher, hash);
+}

hasher.h

@@ -0,0 +1,53 @@
+/**
+ * Copyright (c) 2017 Saleem Rashid
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __HASHER_H__
+#define __HASHER_H__
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "sha2.h"
+
+#define HASHER_DIGEST_LENGTH 32
+
+typedef enum {
+    HASHER_SHA2,
+} HasherType;
+
+typedef struct {
+    HasherType type;
+
+    union {
+        SHA256_CTX sha2;
+    } ctx;
+} Hasher;
+
+void hasher_Init(Hasher *hasher, HasherType type);
+void hasher_Reset(Hasher *hasher);
+void hasher_Update(Hasher *hasher, const uint8_t *data, size_t length);
+void hasher_Final(Hasher *hasher, uint8_t hash[HASHER_DIGEST_LENGTH]);
+void hasher_Double(Hasher *hasher, uint8_t hash[HASHER_DIGEST_LENGTH]);
+
+void hasher_Raw(HasherType type, const uint8_t *data, size_t length, uint8_t hash[HASHER_DIGEST_LENGTH]);
+
+#endif