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| 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 |
| 3 * found in the LICENSE file. |
| 4 * |
| 5 * Tests for firmware image library. |
| 6 */ |
| 7 |
| 8 #include <stdio.h> |
| 9 #include <stdlib.h> |
| 10 |
| 11 #include "cryptolib.h" |
| 12 #include "file_keys.h" |
| 13 #include "firmware_image.h" |
| 14 #include "host_common.h" |
| 15 #include "test_common.h" |
| 16 #include "utility.h" |
| 17 #include "vboot_common.h" |
| 18 |
| 19 |
| 20 static void VerifyPublicKeyToRSA(const VbPublicKey* orig_key) { |
| 21 |
| 22 RSAPublicKey *rsa; |
| 23 VbPublicKey *key = PublicKeyAlloc(orig_key->key_size, 0, 0); |
| 24 |
| 25 PublicKeyCopy(key, orig_key); |
| 26 key->algorithm = kNumAlgorithms; |
| 27 TEST_EQ((size_t)PublicKeyToRSA(key), 0, |
| 28 "PublicKeyToRSA() invalid algorithm"); |
| 29 |
| 30 PublicKeyCopy(key, orig_key); |
| 31 key->key_size -= 1; |
| 32 TEST_EQ((size_t)PublicKeyToRSA(key), 0, |
| 33 "PublicKeyToRSA() invalid size"); |
| 34 |
| 35 rsa = PublicKeyToRSA(orig_key); |
| 36 TEST_NEQ((size_t)rsa, 0, "PublicKeyToRSA() ok"); |
| 37 if (rsa) { |
| 38 TEST_EQ(rsa->algorithm, key->algorithm, "PublicKeyToRSA() algorithm"); |
| 39 RSAPublicKeyFree(rsa); |
| 40 } |
| 41 } |
| 42 |
| 43 |
| 44 static void VerifyDataTest(const VbPublicKey* public_key, |
| 45 const VbPrivateKey* private_key) { |
| 46 |
| 47 const uint8_t test_data[] = "This is some test data to sign."; |
| 48 VbSignature *sig; |
| 49 RSAPublicKey *rsa; |
| 50 |
| 51 sig = CalculateSignature(test_data, sizeof(test_data), private_key); |
| 52 rsa = PublicKeyToRSA(public_key); |
| 53 TEST_NEQ(sig && rsa, 0, "VerifyData() prerequisites"); |
| 54 if (!sig || !rsa) |
| 55 return; |
| 56 |
| 57 TEST_EQ(VerifyData(test_data, sig, rsa), 0, "VerifyData() ok"); |
| 58 |
| 59 sig->sig_size -= 16; |
| 60 TEST_EQ(VerifyData(test_data, sig, rsa), 1, "VerifyData() wrong sig size"); |
| 61 sig->sig_size += 16; |
| 62 |
| 63 GetSignatureData(sig)[0] ^= 0x5A; |
| 64 TEST_EQ(VerifyData(test_data, sig, rsa), 1, "VerifyData() wrong sig"); |
| 65 |
| 66 RSAPublicKeyFree(rsa); |
| 67 Free(sig); |
| 68 } |
| 69 |
| 70 |
| 71 static void ReSignKernelPreamble(VbKernelPreambleHeader *h, |
| 72 const VbPrivateKey *key) { |
| 73 VbSignature *sig = CalculateSignature((const uint8_t*)h, |
| 74 h->preamble_signature.data_size, key); |
| 75 |
| 76 SignatureCopy(&h->preamble_signature, sig); |
| 77 Free(sig); |
| 78 } |
| 79 |
| 80 |
| 81 static void VerifyKernelPreambleTest(const VbPublicKey* public_key, |
| 82 const VbPrivateKey* private_key) { |
| 83 |
| 84 VbKernelPreambleHeader *hdr; |
| 85 VbKernelPreambleHeader *h; |
| 86 RSAPublicKey* rsa; |
| 87 uint64_t hsize; |
| 88 |
| 89 /* Create a dummy signature */ |
| 90 VbSignature *body_sig = SignatureAlloc(56, 78); |
| 91 |
| 92 rsa = PublicKeyToRSA(public_key); |
| 93 hdr = CreateKernelPreamble(0x1234, 0x100000, 0x300000, 0x4000, body_sig, |
| 94 private_key); |
| 95 TEST_NEQ(hdr && rsa, 0, "VerifyKernelPreamble2() prerequisites"); |
| 96 if (!hdr) |
| 97 return; |
| 98 hsize = hdr->preamble_size; |
| 99 h = (VbKernelPreambleHeader*)Malloc(hsize + 16384); |
| 100 |
| 101 TEST_EQ(VerifyKernelPreamble2(hdr, hsize, rsa), 0, |
| 102 "VerifyKernelPreamble2() ok using key"); |
| 103 TEST_NEQ(VerifyKernelPreamble2(hdr, hsize-1, rsa), 0, |
| 104 "VerifyKernelPreamble2() size"); |
| 105 |
| 106 /* Care about major version but not minor */ |
| 107 Memcpy(h, hdr, hsize); |
| 108 h->header_version_major++; |
| 109 ReSignKernelPreamble(h, private_key); |
| 110 TEST_NEQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 111 "VerifyKernelPreamble2() major++"); |
| 112 |
| 113 Memcpy(h, hdr, hsize); |
| 114 h->header_version_major--; |
| 115 ReSignKernelPreamble(h, private_key); |
| 116 TEST_NEQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 117 "VerifyKernelPreamble2() major--"); |
| 118 |
| 119 Memcpy(h, hdr, hsize); |
| 120 h->header_version_minor++; |
| 121 ReSignKernelPreamble(h, private_key); |
| 122 TEST_EQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 123 "VerifyKernelPreamble2() minor++"); |
| 124 |
| 125 Memcpy(h, hdr, hsize); |
| 126 h->header_version_minor--; |
| 127 ReSignKernelPreamble(h, private_key); |
| 128 TEST_EQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 129 "VerifyKernelPreamble2() minor--"); |
| 130 |
| 131 /* Check signature */ |
| 132 Memcpy(h, hdr, hsize); |
| 133 h->preamble_signature.sig_offset = hsize; |
| 134 ReSignKernelPreamble(h, private_key); |
| 135 TEST_NEQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 136 "VerifyKernelPreamble2() sig off end"); |
| 137 |
| 138 Memcpy(h, hdr, hsize); |
| 139 h->preamble_signature.sig_size--; |
| 140 ReSignKernelPreamble(h, private_key); |
| 141 TEST_NEQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 142 "VerifyKernelPreamble2() sig too small"); |
| 143 |
| 144 Memcpy(h, hdr, hsize); |
| 145 GetSignatureData(&h->body_signature)[0] ^= 0x34; |
| 146 TEST_NEQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 147 "VerifyKernelPreamble2() sig mismatch"); |
| 148 |
| 149 /* Check that we signed header and body sig */ |
| 150 Memcpy(h, hdr, hsize); |
| 151 h->preamble_signature.data_size = 4; |
| 152 h->body_signature.sig_offset = 0; |
| 153 h->body_signature.sig_size = 0; |
| 154 ReSignKernelPreamble(h, private_key); |
| 155 TEST_NEQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 156 "VerifyKernelPreamble2() didn't sign header"); |
| 157 |
| 158 Memcpy(h, hdr, hsize); |
| 159 h->body_signature.sig_offset = hsize; |
| 160 ReSignKernelPreamble(h, private_key); |
| 161 TEST_NEQ(VerifyKernelPreamble2(h, hsize, rsa), 0, |
| 162 "VerifyKernelPreamble2() body sig off end"); |
| 163 |
| 164 /* TODO: verify parser can support a bigger header. */ |
| 165 |
| 166 Free(h); |
| 167 RSAPublicKeyFree(rsa); |
| 168 Free(hdr); |
| 169 } |
| 170 |
| 171 |
| 172 int main(int argc, char* argv[]) { |
| 173 VbPrivateKey* private_key = NULL; |
| 174 VbPublicKey* public_key = NULL; |
| 175 int key_algorithm; |
| 176 |
| 177 int error_code = 0; |
| 178 |
| 179 if(argc != 4) { |
| 180 fprintf(stderr, "Usage: %s <key_algorithm> <key> <processed pubkey>" |
| 181 " <signing key> <processed signing key>\n", argv[0]); |
| 182 return -1; |
| 183 } |
| 184 |
| 185 /* Read verification keys and create a test image. */ |
| 186 key_algorithm = atoi(argv[1]); |
| 187 |
| 188 private_key = PrivateKeyRead(argv[2], key_algorithm); |
| 189 if (!private_key) { |
| 190 fprintf(stderr, "Error reading private_key"); |
| 191 return 1; |
| 192 } |
| 193 |
| 194 public_key = PublicKeyRead(argv[3], key_algorithm, 1); |
| 195 if (!public_key) { |
| 196 fprintf(stderr, "Error reading public_key"); |
| 197 return 1; |
| 198 } |
| 199 |
| 200 VerifyPublicKeyToRSA(public_key); |
| 201 VerifyDataTest(public_key, private_key); |
| 202 VerifyKernelPreambleTest(public_key, private_key); |
| 203 |
| 204 if (public_key) |
| 205 Free(public_key); |
| 206 if (private_key) |
| 207 Free(private_key); |
| 208 |
| 209 return error_code; |
| 210 } |
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