summaryrefslogtreecommitdiffstats
path: root/security/nss/cmd/digest/digest.c
blob: 8c4c14926cb6a89ac978e5858364cabecd26f64d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "secutil.h"
#include "pk11func.h"
#include "secoid.h"

#if defined(XP_WIN) || (defined(__sun) && !defined(SVR4))
#if !defined(WIN32)
extern int fread(char *, size_t, size_t, FILE *);
extern int fwrite(char *, size_t, size_t, FILE *);
extern int fprintf(FILE *, char *, ...);
#endif
#endif

#include "plgetopt.h"

static SECOidData *
HashTypeToOID(HASH_HashType hashtype)
{
    SECOidTag hashtag;

    if (hashtype <= HASH_AlgNULL || hashtype >= HASH_AlgTOTAL)
        return NULL;

    switch (hashtype) {
        case HASH_AlgMD2:
            hashtag = SEC_OID_MD2;
            break;
        case HASH_AlgMD5:
            hashtag = SEC_OID_MD5;
            break;
        case HASH_AlgSHA1:
            hashtag = SEC_OID_SHA1;
            break;
        default:
            fprintf(stderr, "A new hash type has been added to HASH_HashType.\n");
            fprintf(stderr, "This program needs to be updated!\n");
            return NULL;
    }

    return SECOID_FindOIDByTag(hashtag);
}

static SECOidData *
HashNameToOID(const char *hashName)
{
    HASH_HashType htype;
    SECOidData *hashOID;

    for (htype = HASH_AlgNULL + 1; htype < HASH_AlgTOTAL; htype++) {
        hashOID = HashTypeToOID(htype);
        if (PORT_Strcasecmp(hashName, hashOID->desc) == 0)
            break;
    }

    if (htype == HASH_AlgTOTAL)
        return NULL;

    return hashOID;
}

static void
Usage(char *progName)
{
    HASH_HashType htype;

    fprintf(stderr,
            "Usage:  %s -t type [-i input] [-o output]\n",
            progName);
    fprintf(stderr, "%-20s Specify the digest method (must be one of\n",
            "-t type");
    fprintf(stderr, "%-20s ", "");
    for (htype = HASH_AlgNULL + 1; htype < HASH_AlgTOTAL; htype++) {
        fprintf(stderr, "%s", HashTypeToOID(htype)->desc);
        if (htype == (HASH_AlgTOTAL - 2))
            fprintf(stderr, " or ");
        else if (htype != (HASH_AlgTOTAL - 1))
            fprintf(stderr, ", ");
    }
    fprintf(stderr, " (case ignored))\n");
    fprintf(stderr, "%-20s Define an input file to use (default is stdin)\n",
            "-i input");
    fprintf(stderr, "%-20s Define an output file to use (default is stdout)\n",
            "-o output");
    exit(-1);
}

static int
DigestFile(FILE *outFile, FILE *inFile, SECOidData *hashOID)
{
    int nb;
    unsigned char ibuf[4096], digest[32];
    PK11Context *hashcx;
    unsigned int len;
    SECStatus rv;

    hashcx = PK11_CreateDigestContext(hashOID->offset);
    if (hashcx == NULL) {
        return -1;
    }
    PK11_DigestBegin(hashcx);

    for (;;) {
        if (feof(inFile))
            break;
        nb = fread(ibuf, 1, sizeof(ibuf), inFile);
        if (nb != sizeof(ibuf)) {
            if (nb == 0) {
                if (ferror(inFile)) {
                    PORT_SetError(SEC_ERROR_IO);
                    PK11_DestroyContext(hashcx, PR_TRUE);
                    return -1;
                }
                /* eof */
                break;
            }
        }
        rv = PK11_DigestOp(hashcx, ibuf, nb);
        if (rv != SECSuccess) {
            PK11_DestroyContext(hashcx, PR_TRUE);
            return -1;
        }
    }

    rv = PK11_DigestFinal(hashcx, digest, &len, 32);
    PK11_DestroyContext(hashcx, PR_TRUE);

    if (rv != SECSuccess)
        return -1;

    nb = fwrite(digest, 1, len, outFile);
    if (nb != len) {
        PORT_SetError(SEC_ERROR_IO);
        return -1;
    }

    return 0;
}

#include "nss.h"

int
main(int argc, char **argv)
{
    char *progName;
    FILE *inFile, *outFile;
    char *hashName;
    SECOidData *hashOID;
    PLOptState *optstate;
    PLOptStatus status;
    SECStatus rv;

    progName = strrchr(argv[0], '/');
    progName = progName ? progName + 1 : argv[0];

    inFile = NULL;
    outFile = NULL;
    hashName = NULL;

    rv = NSS_Init("/tmp");
    if (rv != SECSuccess) {
        fprintf(stderr, "%s: NSS_Init failed in directory %s\n",
                progName, "/tmp");
        return -1;
    }

    /*
     * Parse command line arguments
     */
    optstate = PL_CreateOptState(argc, argv, "t:i:o:");
    while ((status = PL_GetNextOpt(optstate)) == PL_OPT_OK) {
        switch (optstate->option) {
            case '?':
                Usage(progName);
                break;

            case 'i':
                inFile = fopen(optstate->value, "r");
                if (!inFile) {
                    fprintf(stderr, "%s: unable to open \"%s\" for reading\n",
                            progName, optstate->value);
                    return -1;
                }
                break;

            case 'o':
                outFile = fopen(optstate->value, "w");
                if (!outFile) {
                    fprintf(stderr, "%s: unable to open \"%s\" for writing\n",
                            progName, optstate->value);
                    return -1;
                }
                break;

            case 't':
                hashName = strdup(optstate->value);
                break;
        }
    }

    if (!hashName)
        Usage(progName);

    if (!inFile)
        inFile = stdin;
    if (!outFile)
        outFile = stdout;

    hashOID = HashNameToOID(hashName);
    if (hashOID == NULL) {
        fprintf(stderr, "%s: invalid digest type\n", progName);
        Usage(progName);
    }

    if (DigestFile(outFile, inFile, hashOID)) {
        fprintf(stderr, "%s: problem digesting data (%s)\n",
                progName, SECU_Strerror(PORT_GetError()));
        return -1;
    }

    if (NSS_Shutdown() != SECSuccess) {
        exit(1);
    }

    return 0;
}