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Side by Side Diff: src/platform/vboot_reference/crypto/rsa_utility.c

Issue 660261: Refactor siglen_map[] to store key size in bytes instead of 32-bit words. (Closed)
Patch Set: Created 10 years, 9 months ago
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1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. 1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be 2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file. 3 * found in the LICENSE file.
4 * 4 *
5 * Utility functions for message digest functions. 5 * Utility functions for message digest functions.
6 */ 6 */
7 7
8 #include "padding.h" 8 #include "padding.h"
9 #include "rsa_utility.h" 9 #include "rsa_utility.h"
10 #include "sha_utility.h" 10 #include "sha_utility.h"
11 #include "utility.h" 11 #include "utility.h"
12 12
13 int RSAProcessedKeySize(int algorithm) { 13 int RSAProcessedKeySize(int algorithm) {
14 int key_len = siglen_map[algorithm] * sizeof(uint32_t); /* Key length in 14 int key_len = siglen_map[algorithm]; /* Key length in
15 * bytes. */ 15 * bytes. */
16 /* Total size needed by a RSAPublicKey structure is = 16 /* Total size needed by a RSAPublicKey structure is =
17 * 2 * key_len bytes for the n and rr arrays 17 * 2 * key_len bytes for the n and rr arrays
18 * + sizeof len + sizeof n0inv. 18 * + sizeof len + sizeof n0inv.
19 */ 19 */
20 return (2 * key_len + sizeof(int) + sizeof(uint32_t)); 20 return (2 * key_len + sizeof(int) + sizeof(uint32_t));
21 } 21 }
22 22
23 void RSAPublicKeyFree(RSAPublicKey* key) { 23 void RSAPublicKeyFree(RSAPublicKey* key) {
24 if (key) { 24 if (key) {
25 Free(key->n); 25 Free(key->n);
(...skipping 36 matching lines...) Expand 10 before | Expand all | Expand 10 after
62 int algorithm) { 62 int algorithm) {
63 RSAPublicKey* verification_key = NULL; 63 RSAPublicKey* verification_key = NULL;
64 uint8_t* digest = NULL; 64 uint8_t* digest = NULL;
65 int key_size; 65 int key_size;
66 int sig_size; 66 int sig_size;
67 int success; 67 int success;
68 68
69 if (algorithm >= kNumAlgorithms) 69 if (algorithm >= kNumAlgorithms)
70 return 0; /* Invalid algorithm. */ 70 return 0; /* Invalid algorithm. */
71 key_size = RSAProcessedKeySize(algorithm); 71 key_size = RSAProcessedKeySize(algorithm);
72 sig_size = siglen_map[algorithm] * sizeof(uint32_t); 72 sig_size = siglen_map[algorithm];
73 73
74 if (key_blob && !key) 74 if (key_blob && !key)
75 verification_key = RSAPublicKeyFromBuf(key_blob, key_size); 75 verification_key = RSAPublicKeyFromBuf(key_blob, key_size);
76 else if (!key_blob && key) 76 else if (!key_blob && key)
77 verification_key = (RSAPublicKey*) key; /* Supress const warning. */ 77 verification_key = (RSAPublicKey*) key; /* Supress const warning. */
78 else 78 else
79 return 0; /* Both can't be NULL or non-NULL. */ 79 return 0; /* Both can't be NULL or non-NULL. */
80 80
81 digest = DigestBuf(buf, len, algorithm); 81 digest = DigestBuf(buf, len, algorithm);
82 success = RSA_verify(verification_key, sig, sig_size, algorithm, digest); 82 success = RSA_verify(verification_key, sig, sig_size, algorithm, digest);
83 83
84 Free(digest); 84 Free(digest);
85 if (!key) 85 if (!key)
86 RSAPublicKeyFree(verification_key); /* Only free if we allocated it. */ 86 RSAPublicKeyFree(verification_key); /* Only free if we allocated it. */
87 return success; 87 return success;
88 } 88 }
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