Randall Spangler | d183644 | 2010-06-10 09:59:04 -0700 | [diff] [blame^] | 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 | } |