Commit | Line | Data |
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3719602c PC |
1 | /* |
2 | * sha.cpp | |
3 | * | |
4 | * Copyright (C) 1998, 2009 | |
5 | * Paul E. Jones <paulej@packetizer.com> | |
6 | * All Rights Reserved | |
7 | * | |
8 | ***************************************************************************** | |
9 | * $Id: sha.c 12 2009-06-22 19:34:25Z paulej $ | |
10 | ***************************************************************************** | |
11 | * | |
12 | * Description: | |
13 | * This utility will display the message digest (fingerprint) for | |
14 | * the specified file(s). | |
15 | * | |
16 | * Portability Issues: | |
17 | * None. | |
18 | */ | |
19 | ||
20 | #include <stdio.h> | |
21 | #include <string.h> | |
22 | #ifdef _WIN32 | |
23 | #include <io.h> | |
24 | #endif | |
25 | #include <fcntl.h> | |
26 | #include <string/stdstring.h> | |
27 | /*#include "sha1.h"*/ | |
28 | ||
29 | /* | |
30 | * Function prototype | |
31 | */ | |
32 | void usage(void); | |
33 | ||
34 | /* | |
35 | * main | |
36 | * | |
37 | * Description: | |
38 | * This is the entry point for the program | |
39 | * | |
40 | * Parameters: | |
41 | * argc: [in] | |
42 | * This is the count of arguments in the argv array | |
43 | * argv: [in] | |
44 | * This is an array of filenames for which to compute message | |
45 | * digests | |
46 | * | |
47 | * Returns: | |
48 | * Nothing. | |
49 | * | |
50 | * Comments: | |
51 | * | |
52 | */ | |
53 | typedef struct SHA1Context | |
54 | { | |
55 | unsigned Message_Digest[5]; /* Message Digest (output) */ | |
56 | ||
57 | unsigned Length_Low; /* Message length in bits */ | |
58 | unsigned Length_High; /* Message length in bits */ | |
59 | ||
60 | unsigned char Message_Block[64]; /* 512-bit message blocks */ | |
61 | int Message_Block_Index; /* Index into message block array */ | |
62 | ||
63 | int Computed; /* Is the digest computed? */ | |
64 | int Corrupted; /* Is the message digest corruped? */ | |
65 | } SHA1Context; | |
66 | ||
67 | int main(int argc, char *argv[]) | |
68 | { | |
69 | struct SHA1Context sha; /* SHA-1 context */ | |
70 | FILE *fp; /* File pointer for reading files*/ | |
71 | char c; /* Character read from file */ | |
72 | int i; /* Counter */ | |
73 | int reading_stdin; /* Are we reading standard in? */ | |
74 | int read_stdin = 0; /* Have we read stdin? */ | |
75 | ||
76 | /* | |
77 | * Check the program arguments and print usage information if -? | |
78 | * or --help is passed as the first argument. | |
79 | */ | |
80 | if (argc > 1 && (string_is_equal(argv[1],"-?") || | |
81 | string_is_equal(argv[1],"--help"))) | |
82 | { | |
83 | usage(); | |
84 | return 1; | |
85 | } | |
86 | ||
87 | /* | |
88 | * For each filename passed in on the command line, calculate the | |
89 | * SHA-1 value and display it. | |
90 | */ | |
91 | for (i = 0; i < argc; i++) | |
92 | { | |
93 | /* | |
94 | * We start the counter at 0 to guarantee entry into the for | |
95 | * loop. So if 'i' is zero, we will increment it now. If there | |
96 | * is no argv[1], we will use STDIN below. | |
97 | */ | |
98 | if (i == 0) | |
99 | i++; | |
100 | ||
101 | if (argc == 1 || string_is_equal(argv[i],"-")) | |
102 | { | |
103 | #ifdef WIN32 | |
104 | setmode(fileno(stdin), _O_BINARY); | |
105 | #endif | |
106 | fp = stdin; | |
107 | reading_stdin = 1; | |
108 | } | |
109 | else | |
110 | { | |
111 | if (!(fp = fopen(argv[i],"rb"))) | |
112 | { | |
113 | fprintf(stderr, | |
114 | "sha: unable to open file %s\n", | |
115 | argv[i]); | |
116 | return 2; | |
117 | } | |
118 | reading_stdin = 0; | |
119 | } | |
120 | ||
121 | /* | |
122 | * We do not want to read STDIN multiple times | |
123 | */ | |
124 | if (reading_stdin) | |
125 | { | |
126 | if (read_stdin) | |
127 | continue; | |
128 | ||
129 | read_stdin = 1; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Reset the SHA-1 context and process input | |
134 | */ | |
135 | SHA1Reset(&sha); | |
136 | ||
137 | c = fgetc(fp); | |
138 | while(!feof(fp)) | |
139 | { | |
140 | SHA1Input(&sha, &c, 1); | |
141 | c = fgetc(fp); | |
142 | } | |
143 | ||
144 | if (!reading_stdin) | |
145 | fclose(fp); | |
146 | ||
147 | if (!SHA1Result(&sha)) | |
148 | { | |
149 | fprintf(stderr, | |
150 | "sha: could not compute message digest for %s\n", | |
151 | reading_stdin?"STDIN":argv[i]); | |
152 | } | |
153 | else | |
154 | { | |
155 | printf( "%08X %08X %08X %08X %08X - %s\n", | |
156 | sha.Message_Digest[0], | |
157 | sha.Message_Digest[1], | |
158 | sha.Message_Digest[2], | |
159 | sha.Message_Digest[3], | |
160 | sha.Message_Digest[4], | |
161 | reading_stdin?"STDIN":argv[i]); | |
162 | } | |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | /* | |
169 | * usage | |
170 | * | |
171 | * Description: | |
172 | * This function will display program usage information to the | |
173 | * user. | |
174 | * | |
175 | * Parameters: | |
176 | * None. | |
177 | * | |
178 | * Returns: | |
179 | * Nothing. | |
180 | * | |
181 | * Comments: | |
182 | * | |
183 | */ | |
184 | void usage(void) | |
185 | { | |
186 | printf("usage: sha <file> [<file> ...]\n"); | |
187 | printf("\tThis program will display the message digest\n"); | |
188 | printf("\tfor files using the Secure Hashing Algorithm (SHA-1).\n"); | |
189 | } |