RSA signature verification and SHA-1/256/512 reference implementation for verified boot.

src/platform/vboot_reference/include/sha.h

+/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* SHA-1, 256 and 512 functions. */
+
+#ifndef VBOOT_REFERENCE_SHA_H_
+#define VBOOT_REFERENCE_SHA_H_
+
+#include <inttypes.h>
+#include <string.h>
+
+#define SHA1_DIGEST_SIZE 20
+#define SHA1_BLOCK_SIZE 64
+
+#define SHA256_DIGEST_SIZE 32
+#define SHA256_BLOCK_SIZE 64
+
+#define SHA512_DIGEST_SIZE 64
+#define SHA512_BLOCK_SIZE 128
+
+typedef struct SHA1_CTX {
+  uint64_t count;
+  uint32_t state[5];
+#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
+  union {
+    uint8_t b[64];
+    uint32_t w[16];
+  } buf;
+#else
+  uint8_t buf[64];
+#endif
+} SHA1_CTX;
+
+typedef struct {
+  uint32_t h[8];
+  uint32_t tot_len;
+  uint32_t len;
+  uint8_t block[2 * SHA256_BLOCK_SIZE];
+  uint8_t buf[SHA256_DIGEST_SIZE];  /* Used for storing the final digest. */
+} SHA256_CTX;
+
+typedef struct {
+  uint64_t h[8];
+  uint32_t tot_len;
+  uint32_t len;
+  uint8_t block[2 * SHA512_BLOCK_SIZE];
+  uint8_t buf[SHA512_DIGEST_SIZE];  /* Used for storing the final digest. */
+} SHA512_CTX;
+
+
+void SHA1_init(SHA1_CTX* ctx);
+void SHA1_update(SHA1_CTX* ctx, const uint8_t* data, int len);
+uint8_t* SHA1_final(SHA1_CTX* ctx);
+/* Convenience function for SHA-1.  Computes hash on [data] of length [len].
+ * and stores it into [digest]. [digest] should be pre-allocated to
+ * SHA1_DIGEST_SIZE bytes.
+ */
+uint8_t* SHA1(const void* data, int len, uint8_t* digest);
+
+void SHA256_init(SHA256_CTX* ctx);
+void SHA256_update(SHA256_CTX* ctx, const uint8_t* data, int len);
+uint8_t* SHA256_final(SHA256_CTX* ctx);
+uint8_t* SHA256(const uint8_t* data, int len, uint8_t* digest);
+
+void SHA512_init(SHA512_CTX* ctx);
+void SHA512_update(SHA512_CTX* ctx, const uint8_t* data, int len);
+uint8_t* SHA512_final(SHA512_CTX* ctx);
+uint8_t* SHA512(const uint8_t* data, int len, uint8_t* digest);
+
+
+#endif  /* VBOOT_REFERENCE_SHA_H_ */