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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 file and key handling. | 5 * Utility functions for file and key handling. |
6 */ | 6 */ |
7 | 7 |
8 #include "file_keys.h" | 8 #include "file_keys.h" |
9 | 9 |
10 #include <fcntl.h> | 10 #include <fcntl.h> |
11 #include <stdio.h> | 11 #include <stdio.h> |
12 #include <stdlib.h> | 12 #include <stdlib.h> |
13 #include <string.h> | 13 #include <string.h> |
14 #include <sys/stat.h> | 14 #include <sys/stat.h> |
15 #include <sys/types.h> | 15 #include <sys/types.h> |
16 #include <unistd.h> | 16 #include <unistd.h> |
17 | 17 |
18 #include "cryptolib.h" | 18 #include "padding.h" |
| 19 #include "rsa_utility.h" |
19 #include "signature_digest.h" | 20 #include "signature_digest.h" |
20 #include "utility.h" | 21 #include "utility.h" |
21 | 22 |
22 uint8_t* BufferFromFile(const char* input_file, uint64_t* len) { | 23 uint8_t* BufferFromFile(const char* input_file, uint64_t* len) { |
23 int fd; | 24 int fd; |
24 struct stat stat_fd; | 25 struct stat stat_fd; |
25 uint8_t* buf = NULL; | 26 uint8_t* buf = NULL; |
26 | 27 |
27 if ((fd = open(input_file, O_RDONLY)) == -1) { | 28 if ((fd = open(input_file, O_RDONLY)) == -1) { |
28 fprintf(stderr, "Couldn't open file.\n"); | 29 fprintf(stderr, "Couldn't open file.\n"); |
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52 RSAPublicKey* RSAPublicKeyFromFile(const char* input_file) { | 53 RSAPublicKey* RSAPublicKeyFromFile(const char* input_file) { |
53 uint64_t len; | 54 uint64_t len; |
54 RSAPublicKey* key = NULL; | 55 RSAPublicKey* key = NULL; |
55 uint8_t* buf = BufferFromFile(input_file, &len); | 56 uint8_t* buf = BufferFromFile(input_file, &len); |
56 if (buf) | 57 if (buf) |
57 key = RSAPublicKeyFromBuf(buf, len); | 58 key = RSAPublicKeyFromBuf(buf, len); |
58 Free(buf); | 59 Free(buf); |
59 return key; | 60 return key; |
60 } | 61 } |
61 | 62 |
62 uint8_t* DigestFile(char* input_file, int sig_algorithm) { | |
63 int input_fd, len; | |
64 uint8_t data[SHA1_BLOCK_SIZE]; | |
65 uint8_t* digest = NULL; | |
66 DigestContext ctx; | |
67 | |
68 if( (input_fd = open(input_file, O_RDONLY)) == -1 ) { | |
69 debug("Couldn't open input file.\n"); | |
70 return NULL; | |
71 } | |
72 DigestInit(&ctx, sig_algorithm); | |
73 while ( (len = read(input_fd, data, SHA1_BLOCK_SIZE)) == | |
74 SHA1_BLOCK_SIZE) | |
75 DigestUpdate(&ctx, data, len); | |
76 if (len != -1) | |
77 DigestUpdate(&ctx, data, len); | |
78 digest = DigestFinal(&ctx); | |
79 close(input_fd); | |
80 return digest; | |
81 } | |
82 | |
83 uint8_t* SignatureFile(const char* input_file, const char* key_file, | 63 uint8_t* SignatureFile(const char* input_file, const char* key_file, |
84 int algorithm) { | 64 int algorithm) { |
85 char* sign_utility = "./sign_data.sh"; | 65 char* sign_utility = "./sign_data.sh"; |
86 char* cmd; /* Command line to invoke. */ | 66 char* cmd; /* Command line to invoke. */ |
87 int cmd_len; | 67 int cmd_len; |
88 FILE* cmd_out; /* File descriptor to command output. */ | 68 FILE* cmd_out; /* File descriptor to command output. */ |
89 uint8_t* signature = NULL; | 69 uint8_t* signature = NULL; |
90 int signature_size = siglen_map[algorithm]; | 70 int signature_size = siglen_map[algorithm]; |
91 | 71 |
92 /* Build command line: | 72 /* Build command line: |
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111 if (fread(signature, signature_size, 1, cmd_out) != 1) { | 91 if (fread(signature, signature_size, 1, cmd_out) != 1) { |
112 fprintf(stderr, "Couldn't read signature.\n"); | 92 fprintf(stderr, "Couldn't read signature.\n"); |
113 pclose(cmd_out); | 93 pclose(cmd_out); |
114 Free(signature); | 94 Free(signature); |
115 return NULL; | 95 return NULL; |
116 } | 96 } |
117 | 97 |
118 pclose(cmd_out); | 98 pclose(cmd_out); |
119 return signature; | 99 return signature; |
120 } | 100 } |
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