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21c3f7fef7
This reverts commit e018a80a37aaa45681f45f5852f04d20aedd8b2d. Review URL: http://codereview.chromium.org/1593002
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Some utility functions for use with RSA signature verification.
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*/
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#ifndef VBOOT_REFERENCE_RSA_UTILITY_H_
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#define VBOOT_REFERENCE_RSA_UTILITY_H_
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#include "rsa.h"
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/* Returns the size of a pre-processed RSA public key in bytes with algorithm
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* [algorithm]. */
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int RSAProcessedKeySize(int algorithm);
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/* Allocate a new RSAPublicKey structure and initialize its pointer fields to
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* NULL */
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RSAPublicKey* RSAPublicKeyNew(void);
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/* Deep free the contents of [key]. */
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void RSAPublicKeyFree(RSAPublicKey* key);
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/* Create a RSAPublic key structure from binary blob [buf] of length
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* [len].
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*
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* Caller owns the returned key and must free it.
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*/
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RSAPublicKey* RSAPublicKeyFromBuf(const uint8_t* buf, int len);
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/* Perform RSA signature verification on [buf] of length [len] against expected
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* signature [sig] using signature algorithm [algorithm]. The public key used
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* for verification can either be in the form of a pre-process key blob
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* [key_blob] or RSAPublicKey structure [key]. One of [key_blob] or [key] must
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* be non-NULL, and the other NULL or the function will fail.
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*
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* Returns 1 on verification success, 0 on verification failure or invalid
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* arguments.
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*
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* Note: This function is for use in the firmware and assumes all pointers point
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* to areas in the memory of the right size.
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*
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*/
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int RSAVerifyBinary_f(const uint8_t* key_blob,
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const RSAPublicKey* key,
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const uint8_t* buf,
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uint64_t len,
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const uint8_t* sig,
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int algorithm);
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/* Version of RSAVerifyBinary_f() where instead of the raw binary blob
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* of data, its digest is passed as the argument. */
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int RSAVerifyBinaryWithDigest_f(const uint8_t* key_blob,
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const RSAPublicKey* key,
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const uint8_t* digest,
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const uint8_t* sig,
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int algorithm);
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#endif /* VBOOT_REFERENCE_RSA_UTILITY_H_ */
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