summaryrefslogtreecommitdiffstats
path: root/security/nss/cmd/btoa/btoa.c
blob: 2a5e6d4c6543ffae08c45b7c0f56f8c53312f424 (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
/* 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 "plgetopt.h"
#include "secutil.h"
#include "nssb64.h"
#include <errno.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

#if defined(WIN32)
#include "fcntl.h"
#include "io.h"
#endif

static PRInt32
output_ascii(void *arg, const char *obuf, PRInt32 size)
{
    FILE *outFile = arg;
    int nb;

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

    return nb;
}

static SECStatus
encode_file(FILE *outFile, FILE *inFile)
{
    NSSBase64Encoder *cx;
    int nb;
    SECStatus status = SECFailure;
    unsigned char ibuf[4096];

    cx = NSSBase64Encoder_Create(output_ascii, outFile);
    if (!cx) {
        return -1;
    }

    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);
                    goto loser;
                }
                /* eof */
                break;
            }
        }

        status = NSSBase64Encoder_Update(cx, ibuf, nb);
        if (status != SECSuccess)
            goto loser;
    }

    status = NSSBase64Encoder_Destroy(cx, PR_FALSE);
    if (status != SECSuccess)
        return status;

    /*
     * Add a trailing CRLF.  Note this must be done *after* the call
     * to Destroy above (because only then are we sure all data has
     * been written out).
     */
    fwrite("\r\n", 1, 2, outFile);
    return SECSuccess;

loser:
    (void)NSSBase64Encoder_Destroy(cx, PR_TRUE);
    return status;
}

static void
Usage(char *progName)
{
    fprintf(stderr,
            "Usage: %s [-i input] [-o output]\n",
            progName);
    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");
    fprintf(stderr, "%-20s Wrap output in BEGIN/END lines and the given suffix\n",
            "-w suffix");
    fprintf(stderr, "%-20s (use \"c\" as a shortcut for suffix CERTIFICATE)\n",
            "");
    exit(-1);
}

int
main(int argc, char **argv)
{
    char *progName;
    SECStatus rv;
    FILE *inFile, *outFile;
    PLOptState *optstate;
    PLOptStatus status;
    char *suffix = NULL;

    inFile = 0;
    outFile = 0;
    progName = strrchr(argv[0], '/');
    if (!progName)
        progName = strrchr(argv[0], '\\');
    progName = progName ? progName + 1 : argv[0];

    /* Parse command line arguments */
    optstate = PL_CreateOptState(argc, argv, "i:o:w:");
    while ((status = PL_GetNextOpt(optstate)) == PL_OPT_OK) {
        switch (optstate->option) {
            default:
                Usage(progName);
                break;

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

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

            case 'w':
                if (!strcmp(optstate->value, "c"))
                    suffix = strdup("CERTIFICATE");
                else
                    suffix = strdup(optstate->value);
                break;
        }
    }
    if (status == PL_OPT_BAD)
        Usage(progName);
    if (!inFile) {
#if defined(WIN32)
        /* If we're going to read binary data from stdin, we must put stdin
        ** into O_BINARY mode or else incoming \r\n's will become \n's.
        */

        int smrv = _setmode(_fileno(stdin), _O_BINARY);
        if (smrv == -1) {
            fprintf(stderr,
                    "%s: Cannot change stdin to binary mode. Use -i option instead.\n",
                    progName);
            return smrv;
        }
#endif
        inFile = stdin;
    }
    if (!outFile) {
#if defined(WIN32)
        /* We're going to write binary data to stdout. We must put stdout
        ** into O_BINARY mode or else outgoing \r\n's will become \r\r\n's.
        */

        int smrv = _setmode(_fileno(stdout), _O_BINARY);
        if (smrv == -1) {
            fprintf(stderr,
                    "%s: Cannot change stdout to binary mode. Use -o option instead.\n",
                    progName);
            return smrv;
        }
#endif
        outFile = stdout;
    }
    if (suffix) {
        fprintf(outFile, "-----BEGIN %s-----\n", suffix);
    }
    rv = encode_file(outFile, inFile);
    if (rv != SECSuccess) {
        fprintf(stderr, "%s: lossage: error=%d errno=%d\n",
                progName, PORT_GetError(), errno);
        return -1;
    }
    if (suffix) {
        fprintf(outFile, "-----END %s-----\n", suffix);
    }
    return 0;
}