Major refactoring of structures, with unit tests.

vboot_firmware/lib/include/vboot_common.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.
+ *
+ * Common functions between firmware and kernel verified boot.
+ */
+
+#ifndef VBOOT_REFERENCE_VBOOT_COMMON_H_
+#define VBOOT_REFERENCE_VBOOT_COMMON_H_
+
+#include <stdint.h>
+
+#include "cryptolib.h"
+#include "vboot_struct.h"
+
+/* Error Codes for VerifyFirmware. */
+#define VBOOT_SUCCESS 0
+#define VBOOT_INVALID_IMAGE 1
+#define VBOOT_KEY_SIGNATURE_FAILED 2
+#define VBOOT_INVALID_ALGORITHM 3
+#define VBOOT_PREAMBLE_SIGNATURE_FAILED 4
+#define VBOOT_SIGNATURE_FAILED 5
+#define VBOOT_WRONG_MAGIC 6
+#define VBOOT_ERROR_MAX 7  /* Generic catch-all. */
+
+extern char* kVbootErrors[VBOOT_ERROR_MAX];
+
+
+/* Return offset of ptr from base. */
+uint64_t OffsetOf(const void* base, const void* ptr);
+
+
+/* Helper functions to get data pointed to by a public key or signature. */
+uint8_t* GetPublicKeyData(VbPublicKey* key);
+const uint8_t* GetPublicKeyDataC(const VbPublicKey* key);
+uint8_t* GetSignatureData(VbSignature* sig);
+const uint8_t* GetSignatureDataC(const VbSignature* sig);
+
+
+/* Helper functions to verify the data pointed to by a subfield is inside
+ * the parent data.  Returns 0 if inside, 1 if error. */
+int VerifyMemberInside(const void* parent, uint64_t parent_size,
+                       const void* member, uint64_t member_size,
+                       uint64_t member_data_offset,
+                       uint64_t member_data_size);
+
+int VerifyPublicKeyInside(const void* parent, uint64_t parent_size,
+                          const VbPublicKey* key);
+
+int VerifySignatureInside(const void* parent, uint64_t parent_size,
+                          const VbSignature* sig);
+
+
+/* Converts a public key to RsaPublicKey format.  The returned key must
+ * be freed using RSAPublicKeyFree().
+ *
+ * Returns NULL if error. */
+RSAPublicKey* PublicKeyToRSA(const VbPublicKey* key);
+
+
+/* Verifies [data] matches signature [sig] using [key]. */
+int VerifyData(const uint8_t* data, const VbSignature* sig,
+               const RSAPublicKey* key);
+
+
+/* Checks the sanity of a key block of size [size] bytes, using public
+ * key [key].  If [key]==NULL, uses only the block checksum to verify
+ * the key block.  Header fields are also checked for sanity.  Does not
+ * verify key index or key block flags. */
+int VerifyKeyBlock(const VbKeyBlockHeader* block, uint64_t size,
+                   const VbPublicKey *key);
+
+
+/* Checks the sanity of a firmware preamble of size [size] bytes,
+ * using public key [key].
+ *
+ * Returns VBOOT_SUCCESS if successful. */
+int VerifyFirmwarePreamble2(const VbFirmwarePreambleHeader* preamble,
+                           uint64_t size, const RSAPublicKey* key);
+
+
+/* Checks the sanity of a kernel preamble of size [size] bytes,
+ * using public key [key].
+ *
+ * Returns VBOOT_SUCCESS if successful. */
+int VerifyKernelPreamble2(const VbKernelPreambleHeader* preamble,
+                         uint64_t size, const RSAPublicKey* key);
+
+
+
+
+#endif  /* VBOOT_REFERENCE_VBOOT_COMMON_H_ */