| 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 | } |