]>
Commit | Line | Data |
---|---|---|
8efc0c15 | 1 | /* |
2 | ||
3 | ssh-add.c | |
4 | ||
5 | Author: Tatu Ylonen <ylo@cs.hut.fi> | |
6 | ||
7 | Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
8 | All rights reserved | |
9 | ||
10 | Created: Thu Apr 6 00:52:24 1995 ylo | |
11 | ||
12 | Adds an identity to the authentication server, or removes an identity. | |
13 | ||
14 | */ | |
15 | ||
16 | #include "includes.h" | |
17 | RCSID("$Id$"); | |
18 | ||
19 | #include "rsa.h" | |
20 | #include "ssh.h" | |
21 | #include "xmalloc.h" | |
22 | #include "authfd.h" | |
23 | ||
24 | void | |
5068f573 | 25 | delete_file(AuthenticationConnection *ac, const char *filename) |
8efc0c15 | 26 | { |
27 | RSA *key; | |
28 | char *comment; | |
8efc0c15 | 29 | |
30 | key = RSA_new(); | |
31 | if (!load_public_key(filename, key, &comment)) | |
32 | { | |
33 | printf("Bad key file %s: %s\n", filename, strerror(errno)); | |
34 | return; | |
35 | } | |
36 | ||
8efc0c15 | 37 | if (ssh_remove_identity(ac, key)) |
38 | fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment); | |
39 | else | |
40 | fprintf(stderr, "Could not remove identity: %s\n", filename); | |
41 | RSA_free(key); | |
42 | xfree(comment); | |
8efc0c15 | 43 | } |
44 | ||
45 | void | |
5068f573 | 46 | delete_all(AuthenticationConnection *ac) |
8efc0c15 | 47 | { |
8efc0c15 | 48 | /* Send a request to remove all identities. */ |
49 | if (ssh_remove_all_identities(ac)) | |
50 | fprintf(stderr, "All identities removed.\n"); | |
51 | else | |
52 | fprintf(stderr, "Failed to remove all identitities.\n"); | |
8efc0c15 | 53 | } |
54 | ||
e1a9c08d | 55 | #define BUFSIZE 1024 |
8efc0c15 | 56 | void |
5068f573 | 57 | add_file(AuthenticationConnection *ac, const char *filename) |
8efc0c15 | 58 | { |
59 | RSA *key; | |
60 | RSA *public_key; | |
8efc0c15 | 61 | char *saved_comment, *comment, *pass; |
62 | int first; | |
045672f9 | 63 | #ifndef DISABLE_EXTERNAL_ASKPASS |
e1a9c08d | 64 | int pipes[2]; |
65 | char buf[BUFSIZE]; | |
66 | int tmp; | |
67 | pid_t child; | |
68 | FILE *pipef; | |
045672f9 | 69 | #endif /* !DISABLE_EXTERNAL_ASKPASS */ |
70 | ||
8efc0c15 | 71 | key = RSA_new(); |
72 | public_key = RSA_new(); | |
73 | if (!load_public_key(filename, public_key, &saved_comment)) | |
74 | { | |
75 | printf("Bad key file %s: %s\n", filename, strerror(errno)); | |
76 | return; | |
77 | } | |
78 | RSA_free(public_key); | |
79 | ||
80 | pass = xstrdup(""); | |
81 | first = 1; | |
82 | while (!load_private_key(filename, pass, key, &comment)) | |
83 | { | |
84 | /* Free the old passphrase. */ | |
85 | memset(pass, 0, strlen(pass)); | |
86 | xfree(pass); | |
87 | ||
88 | /* Ask for a passphrase. */ | |
89 | if (getenv("DISPLAY") && !isatty(fileno(stdin))) | |
90 | { | |
045672f9 | 91 | #ifndef DISABLE_EXTERNAL_ASKPASS |
e1a9c08d | 92 | if (pipe(pipes) ==-1) |
93 | { | |
94 | fprintf(stderr, "Creating pipes failed: %s\n", strerror(errno)); | |
95 | exit(1); | |
96 | } | |
97 | if (fflush(NULL)==EOF) | |
98 | { | |
99 | fprintf(stderr, "Cannot flush buffers: %s\n", strerror(errno)); | |
100 | exit(1); | |
101 | } | |
102 | switch (child=fork()) | |
103 | { | |
104 | case -1: | |
105 | fprintf(stderr, "Cannot fork: %s\n", strerror(errno)); | |
106 | exit(1); | |
107 | case 0: | |
108 | close(pipes[0]); | |
109 | if (dup2(pipes[1], 1) ==-1) | |
110 | { | |
111 | fprintf(stderr, "dup2 failed: %s\n", strerror(errno)); | |
112 | exit(1); | |
113 | } | |
114 | tmp=snprintf(buf, BUFSIZE, "Need passphrase for %s (%s)", | |
115 | filename, saved_comment); | |
116 | /* skip the prompt if it won't fit */ | |
117 | if (tmp < 0 || tmp >= BUFSIZE) | |
d4f11b59 | 118 | tmp=execlp(ASKPASS_PROGRAM, "ssh-askpass", 0); |
e1a9c08d | 119 | else |
d4f11b59 | 120 | tmp=execlp(ASKPASS_PROGRAM, "ssh-askpass", buf, 0); |
e1a9c08d | 121 | if (tmp==-1) |
122 | { | |
123 | fprintf(stderr, "Executing ssh-askpass failed: %s\n", | |
124 | strerror(errno)); | |
125 | exit(1); | |
126 | } | |
127 | break; | |
128 | default: | |
129 | close(pipes[1]); | |
130 | if ( (pipef=fdopen(pipes[0], "r")) ==NULL) | |
131 | { | |
132 | fprintf(stderr, "fdopen failed: %s\n", strerror(errno)); | |
133 | exit(1); | |
134 | } | |
135 | if(fgets(buf, sizeof(buf), pipef)==NULL) | |
136 | { | |
137 | xfree(saved_comment); | |
138 | return; | |
139 | } | |
140 | fclose(pipef); | |
141 | if (strchr(buf, '\n')) | |
142 | *strchr(buf, '\n') = 0; | |
143 | pass = xstrdup(buf); | |
144 | memset(buf, 0, sizeof(buf)); | |
145 | if (waitpid(child, NULL, 0) ==-1) | |
146 | { | |
147 | fprintf(stderr, "Waiting for child failed: %s\n", | |
148 | strerror(errno)); | |
149 | exit(1); | |
150 | } | |
151 | if (strcmp(pass, "") == 0) | |
152 | { | |
153 | xfree(saved_comment); | |
154 | xfree(pass); | |
155 | return; | |
156 | } | |
157 | } | |
045672f9 | 158 | #else /* !DISABLE_EXTERNAL_ASKPASS */ |
159 | xfree(saved_comment); | |
160 | return; | |
161 | #endif /* !DISABLE_EXTERNAL_ASKPASS */ | |
8efc0c15 | 162 | } |
163 | else | |
164 | { | |
165 | if (first) | |
166 | printf("Need passphrase for %s (%s).\n", filename, saved_comment); | |
167 | else | |
168 | printf("Bad passphrase.\n"); | |
169 | pass = read_passphrase("Enter passphrase: ", 1); | |
170 | if (strcmp(pass, "") == 0) | |
171 | { | |
172 | xfree(saved_comment); | |
173 | xfree(pass); | |
174 | return; | |
175 | } | |
176 | } | |
177 | first = 0; | |
178 | } | |
179 | memset(pass, 0, strlen(pass)); | |
180 | xfree(pass); | |
181 | ||
182 | xfree(saved_comment); | |
183 | ||
8efc0c15 | 184 | if (ssh_add_identity(ac, key, comment)) |
185 | fprintf(stderr, "Identity added: %s (%s)\n", filename, comment); | |
186 | else | |
187 | fprintf(stderr, "Could not add identity: %s\n", filename); | |
188 | RSA_free(key); | |
189 | xfree(comment); | |
8efc0c15 | 190 | } |
191 | ||
192 | void | |
5068f573 | 193 | list_identities(AuthenticationConnection *ac) |
8efc0c15 | 194 | { |
8efc0c15 | 195 | BIGNUM *e, *n; |
196 | int bits, status; | |
197 | char *comment; | |
198 | int had_identities; | |
199 | ||
8efc0c15 | 200 | e = BN_new(); |
201 | n = BN_new(); | |
202 | had_identities = 0; | |
203 | for (status = ssh_get_first_identity(ac, &bits, e, n, &comment); | |
204 | status; | |
205 | status = ssh_get_next_identity(ac, &bits, e, n, &comment)) | |
206 | { | |
207 | char *buf; | |
208 | had_identities = 1; | |
209 | printf("%d ", bits); | |
210 | buf = BN_bn2dec(e); | |
5bae4ab8 | 211 | if (buf != NULL) { |
212 | printf("%s ", buf); | |
213 | free (buf); | |
214 | } else { | |
215 | error("list_identities: BN_bn2dec #1 failed."); | |
216 | } | |
8efc0c15 | 217 | buf = BN_bn2dec(n); |
5bae4ab8 | 218 | if (buf != NULL) { |
219 | printf("%s %s\n", buf, comment); | |
220 | free (buf); | |
221 | } else { | |
222 | error("list_identities: BN_bn2dec #2 failed."); | |
223 | } | |
8efc0c15 | 224 | xfree(comment); |
225 | } | |
226 | BN_clear_free(e); | |
227 | BN_clear_free(n); | |
228 | if (!had_identities) | |
229 | printf("The agent has no identities.\n"); | |
8efc0c15 | 230 | } |
231 | ||
232 | int | |
5068f573 | 233 | main(int argc, char **argv) |
8efc0c15 | 234 | { |
5068f573 | 235 | AuthenticationConnection *ac = NULL; |
8efc0c15 | 236 | struct passwd *pw; |
237 | char buf[1024]; | |
238 | int no_files = 1; | |
239 | int i; | |
240 | int deleting = 0; | |
241 | ||
242 | /* check if RSA support exists */ | |
243 | if (rsa_alive() == 0) { | |
244 | extern char *__progname; | |
245 | ||
246 | fprintf(stderr, | |
247 | "%s: no RSA support in libssl and libcrypto. See ssl(8).\n", | |
248 | __progname); | |
249 | exit(1); | |
250 | } | |
251 | ||
5068f573 | 252 | /* At first, get a connection to the authentication agent. */ |
253 | ac = ssh_get_authentication_connection(); | |
254 | if (ac == NULL) { | |
255 | fprintf(stderr, "Could not open a connection to your authentication agent.\n"); | |
256 | exit(1); | |
257 | } | |
258 | ||
259 | for (i = 1; i < argc; i++) | |
8efc0c15 | 260 | { |
5068f573 | 261 | if (strcmp(argv[i], "-l") == 0) |
8efc0c15 | 262 | { |
5068f573 | 263 | list_identities(ac); |
8efc0c15 | 264 | no_files = 0; /* Don't default-add/delete if -l. */ |
265 | continue; | |
266 | } | |
5068f573 | 267 | if (strcmp(argv[i], "-d") == 0) |
8efc0c15 | 268 | { |
269 | deleting = 1; | |
270 | continue; | |
271 | } | |
5068f573 | 272 | if (strcmp(argv[i], "-D") == 0) |
8efc0c15 | 273 | { |
5068f573 | 274 | delete_all(ac); |
8efc0c15 | 275 | no_files = 0; |
276 | continue; | |
277 | } | |
278 | no_files = 0; | |
279 | if (deleting) | |
5068f573 | 280 | delete_file(ac, argv[i]); |
8efc0c15 | 281 | else |
5068f573 | 282 | add_file(ac, argv[i]); |
8efc0c15 | 283 | } |
284 | if (no_files) | |
285 | { | |
286 | pw = getpwuid(getuid()); | |
287 | if (!pw) | |
288 | { | |
289 | fprintf(stderr, "No user found with uid %d\n", (int)getuid()); | |
5068f573 | 290 | ssh_close_authentication_connection(ac); |
8efc0c15 | 291 | exit(1); |
292 | } | |
293 | snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); | |
294 | if (deleting) | |
5068f573 | 295 | delete_file(ac, buf); |
8efc0c15 | 296 | else |
5068f573 | 297 | add_file(ac, buf); |
8efc0c15 | 298 | } |
5068f573 | 299 | ssh_close_authentication_connection(ac); |
8efc0c15 | 300 | exit(0); |
301 | } |