Annotation of src/usr.bin/htpasswd/htpasswd.c, Revision 1.14
1.14 ! millert 1: /* $OpenBSD: htpasswd.c,v 1.13 2015/10/09 01:37:07 deraadt Exp $ */
1.1 florian 2: /*
3: * Copyright (c) 2014 Florian Obser <florian@openbsd.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17:
18: #include <sys/stat.h>
19:
20: #include <err.h>
21: #include <errno.h>
1.5 florian 22: #include <fcntl.h>
1.1 florian 23: #include <limits.h>
24: #include <pwd.h>
25: #include <readpassphrase.h>
26: #include <stdio.h>
27: #include <stdlib.h>
28: #include <string.h>
29: #include <unistd.h>
30:
31: __dead void usage(void);
32: void nag(char*);
33:
34: extern char *__progname;
35:
36: __dead void
37: usage(void)
38: {
1.7 florian 39: fprintf(stderr, "usage:\t%s [file] login\n", __progname);
1.10 florian 40: fprintf(stderr, "\t%s -I [file]\n", __progname);
1.1 florian 41: exit(1);
42: }
43:
1.6 florian 44: #define MAXNAG 5
45: int nagcount;
46:
1.1 florian 47: int
48: main(int argc, char** argv)
49: {
1.12 deraadt 50: char salt[_PASSWORD_LEN], tmpl[sizeof("/tmp/htpasswd-XXXXXXXXXX")];
51: char hash[_PASSWORD_LEN], pass[1024], pass2[1024];
52: char *line = NULL, *login = NULL, *tok;
53: int c, fd, loginlen, batch = 0;
54: FILE *in = NULL, *out = NULL;
55: const char *file = NULL;
56: size_t linesize = 0;
1.1 florian 57: ssize_t linelen;
1.2 florian 58: mode_t old_umask;
1.1 florian 59:
1.14 ! millert 60: if (pledge("stdio rpath wpath cpath flock tmppath tty", NULL) == -1)
1.13 deraadt 61: err(1, "pledge");
1.1 florian 62:
1.10 florian 63: while ((c = getopt(argc, argv, "I")) != -1) {
1.7 florian 64: switch (c) {
1.10 florian 65: case 'I':
1.11 deraadt 66: batch = 1;
1.7 florian 67: break;
68: default:
69: usage();
70: /* NOT REACHED */
71: break;
72: }
73: }
74:
75: argc -= optind;
76: argv += optind;
77:
78: if (batch) {
79: if (argc == 1)
80: file = argv[0];
81: else if (argc > 1)
82: usage();
83: if ((linelen = getline(&line, &linesize, stdin)) == -1)
1.9 florian 84: err(1, "cannot read login:password from stdin");
1.7 florian 85: line[linelen-1] = '\0';
86:
87: if ((tok = strstr(line, ":")) == NULL)
1.9 florian 88: errx(1, "cannot find ':' in input");
1.7 florian 89: *tok++ = '\0';
90:
91: if ((loginlen = asprintf(&login, "%s:", line)) == -1)
1.1 florian 92: err(1, "asprintf");
93:
1.7 florian 94: if (strlcpy(pass, tok, sizeof(pass)) >= sizeof(pass))
1.9 florian 95: errx(1, "password too long");
1.7 florian 96: } else {
97:
98: switch (argc) {
99: case 1:
100: if ((loginlen = asprintf(&login, "%s:", argv[0])) == -1)
101: err(1, "asprintf");
102: break;
103: case 2:
104: file = argv[0];
105: if ((loginlen = asprintf(&login, "%s:", argv[1])) == -1)
106: err(1, "asprintf");
107: break;
108: default:
109: usage();
110: /* NOT REACHED */
111: break;
112: }
113:
114: if (!readpassphrase("Password: ", pass, sizeof(pass),
115: RPP_ECHO_OFF))
116: err(1, "unable to read password");
117: if (!readpassphrase("Retype Password: ", pass2, sizeof(pass2),
118: RPP_ECHO_OFF)) {
119: explicit_bzero(pass, sizeof(pass));
120: err(1, "unable to read password");
121: }
122: if (strcmp(pass, pass2) != 0) {
123: explicit_bzero(pass, sizeof(pass));
124: explicit_bzero(pass2, sizeof(pass2));
125: errx(1, "passwords don't match");
126: }
127:
1.1 florian 128: explicit_bzero(pass2, sizeof(pass2));
129: }
130:
131: if (strlcpy(salt, bcrypt_gensalt(8), sizeof(salt)) >= sizeof(salt))
1.9 florian 132: errx(1, "salt too long");
1.1 florian 133: if (strlcpy(hash, bcrypt(pass, salt), sizeof(hash)) >= sizeof(hash))
1.9 florian 134: errx(1, "hash too long");
1.1 florian 135: explicit_bzero(pass, sizeof(pass));
136:
137: if (file == NULL)
138: printf("%s%s\n", login, hash);
139: else {
140: if ((in = fopen(file, "r+")) == NULL) {
141: if (errno == ENOENT) {
1.2 florian 142: old_umask = umask(S_IXUSR|
143: S_IWGRP|S_IRGRP|S_IXGRP|
144: S_IWOTH|S_IROTH|S_IXOTH);
1.1 florian 145: if ((out = fopen(file, "w")) == NULL)
146: err(1, "cannot open password file for"
147: " reading or writing");
1.2 florian 148: umask(old_umask);
1.1 florian 149: } else
1.4 benno 150: err(1, "cannot open password file for"
151: " reading or writing");
1.5 florian 152: } else
153: if (flock(fileno(in), LOCK_EX|LOCK_NB) == -1)
154: errx(1, "cannot lock password file");
155:
1.1 florian 156: /* file already exits, copy content and filter login out */
157: if (out == NULL) {
158: strlcpy(tmpl, "/tmp/htpasswd-XXXXXXXXXX", sizeof(tmpl));
159: if ((fd = mkstemp(tmpl)) == -1)
160: err(1, "mkstemp");
161:
162: if ((out = fdopen(fd, "w+")) == NULL)
163: err(1, "cannot open tempfile");
164:
165: while ((linelen = getline(&line, &linesize, in))
166: != -1) {
167: if (strncmp(line, login, loginlen) != 0) {
168: if (fprintf(out, "%s", line) == -1)
1.9 florian 169: errx(1, "cannot write to temp "
1.1 florian 170: "file");
171: nag(line);
172: }
173: }
174: }
175: if (fprintf(out, "%s%s\n", login, hash) == -1)
1.9 florian 176: errx(1, "cannot write new password hash");
1.1 florian 177:
178: /* file already exists, overwrite it */
179: if (in != NULL) {
180: if (fseek(in, 0, SEEK_SET) == -1)
181: err(1, "cannot seek in password file");
1.4 benno 182: if (fseek(out, 0, SEEK_SET) == -1)
183: err(1, "cannot seek in temp file");
1.1 florian 184: if (ftruncate(fileno(in), 0) == -1)
185: err(1, "cannot truncate password file");
186: while ((linelen = getline(&line, &linesize, out))
187: != -1)
188: if (fprintf(in, "%s", line) == -1)
1.9 florian 189: errx(1, "cannot write to password "
190: "file");
1.1 florian 191: if (fclose(in) == EOF)
192: err(1, "cannot close password file");
193: }
194: if (fclose(out) == EOF) {
195: if (in != NULL)
196: err(1, "cannot close temp file");
197: else
198: err(1, "cannot close password file");
199: }
200: if (in != NULL && unlink(tmpl) == -1)
201: err(1, "cannot delete temp file (%s)", tmpl);
202: }
1.6 florian 203: if (nagcount >= MAXNAG)
1.9 florian 204: warnx("%d more logins not using bcryt.", nagcount - MAXNAG);
1.1 florian 205: exit(0);
206: }
207:
208: void
209: nag(char* line)
210: {
1.9 florian 211: const char *tok;
1.1 florian 212: if (strtok(line, ":") != NULL)
213: if ((tok = strtok(NULL, ":")) != NULL)
214: if (strncmp(tok, "$2a$", 4) != 0 &&
1.6 florian 215: strncmp(tok, "$2b$", 4) != 0) {
216: nagcount++;
217: if (nagcount <= MAXNAG)
1.9 florian 218: warnx("%s doesn't use bcrypt."
219: " Update the password.", line);
1.6 florian 220: }
1.1 florian 221: }
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