Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 4 | * All rights reserved |
| 5 | * Created: Thu Apr 6 00:52:24 1995 ylo |
| 6 | * Adds an identity to the authentication server, or removes an identity. |
| 7 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 8 | |
| 9 | #include "includes.h" |
Damien Miller | 70fb671 | 2000-05-01 20:59:50 +1000 | [diff] [blame] | 10 | RCSID("$Id: ssh-add.c,v 1.18 2000/05/01 10:59:50 damien Exp $"); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 11 | |
| 12 | #include <openssl/rsa.h> |
| 13 | #include <openssl/dsa.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 14 | |
| 15 | #include "rsa.h" |
| 16 | #include "ssh.h" |
| 17 | #include "xmalloc.h" |
| 18 | #include "authfd.h" |
Damien Miller | 10f6f6b | 1999-11-17 17:29:08 +1100 | [diff] [blame] | 19 | #include "fingerprint.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 20 | #include "key.h" |
| 21 | #include "authfile.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 22 | |
Damien Miller | 3f90587 | 1999-11-15 17:10:57 +1100 | [diff] [blame] | 23 | #ifdef HAVE___PROGNAME |
| 24 | extern char *__progname; |
| 25 | #else /* HAVE___PROGNAME */ |
Damien Miller | 70fb671 | 2000-05-01 20:59:50 +1000 | [diff] [blame] | 26 | static const char *__progname = "ssh-add"; |
Damien Miller | 3f90587 | 1999-11-15 17:10:57 +1100 | [diff] [blame] | 27 | #endif /* HAVE___PROGNAME */ |
| 28 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 29 | void |
Damien Miller | 01ab4a2 | 1999-10-28 15:23:30 +1000 | [diff] [blame] | 30 | delete_file(AuthenticationConnection *ac, const char *filename) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 31 | { |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 32 | Key *public; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 33 | char *comment; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 34 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 35 | public = key_new(KEY_RSA); |
| 36 | if (!load_public_key(filename, public, &comment)) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 37 | printf("Bad key file %s: %s\n", filename, strerror(errno)); |
| 38 | return; |
| 39 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 40 | if (ssh_remove_identity(ac, public->rsa)) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 41 | fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment); |
| 42 | else |
| 43 | fprintf(stderr, "Could not remove identity: %s\n", filename); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 44 | key_free(public); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 45 | xfree(comment); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 46 | } |
| 47 | |
| 48 | void |
Damien Miller | 01ab4a2 | 1999-10-28 15:23:30 +1000 | [diff] [blame] | 49 | delete_all(AuthenticationConnection *ac) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 50 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 51 | /* Send a request to remove all identities. */ |
| 52 | if (ssh_remove_all_identities(ac)) |
| 53 | fprintf(stderr, "All identities removed.\n"); |
| 54 | else |
| 55 | fprintf(stderr, "Failed to remove all identitities.\n"); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 56 | } |
| 57 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 58 | char * |
| 59 | ssh_askpass(char *askpass, char *msg) |
| 60 | { |
| 61 | pid_t pid; |
| 62 | size_t len; |
| 63 | char *nl, *pass; |
| 64 | int p[2], status; |
| 65 | char buf[1024]; |
| 66 | |
| 67 | if (askpass == NULL) |
| 68 | fatal("internal error: askpass undefined"); |
| 69 | if (pipe(p) < 0) |
| 70 | fatal("ssh_askpass: pipe: %s", strerror(errno)); |
| 71 | if ((pid = fork()) < 0) |
| 72 | fatal("ssh_askpass: fork: %s", strerror(errno)); |
| 73 | if (pid == 0) { |
| 74 | close(p[0]); |
| 75 | if (dup2(p[1], STDOUT_FILENO) < 0) |
| 76 | fatal("ssh_askpass: dup2: %s", strerror(errno)); |
| 77 | execlp(askpass, askpass, msg, (char *) 0); |
| 78 | fatal("ssh_askpass: exec(%s): %s", askpass, strerror(errno)); |
| 79 | } |
| 80 | close(p[1]); |
| 81 | len = read(p[0], buf, sizeof buf); |
| 82 | close(p[0]); |
| 83 | while (waitpid(pid, &status, 0) < 0) |
| 84 | if (errno != EINTR) |
| 85 | break; |
| 86 | if (len <= 1) |
| 87 | return xstrdup(""); |
| 88 | nl = strchr(buf, '\n'); |
| 89 | if (nl) |
| 90 | *nl = '\0'; |
| 91 | pass = xstrdup(buf); |
| 92 | memset(buf, 0, sizeof(buf)); |
| 93 | return pass; |
| 94 | } |
| 95 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 96 | void |
Damien Miller | 01ab4a2 | 1999-10-28 15:23:30 +1000 | [diff] [blame] | 97 | add_file(AuthenticationConnection *ac, const char *filename) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 98 | { |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 99 | Key *public; |
| 100 | Key *private; |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 101 | char *saved_comment, *comment, *askpass = NULL; |
| 102 | char buf[1024], msg[1024]; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 103 | int success; |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 104 | int interactive = isatty(STDIN_FILENO); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 105 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 106 | public = key_new(KEY_RSA); |
| 107 | if (!load_public_key(filename, public, &saved_comment)) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 108 | printf("Bad key file %s: %s\n", filename, strerror(errno)); |
| 109 | return; |
| 110 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 111 | key_free(public); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 112 | |
Damien Miller | aae6c61 | 1999-12-06 11:47:28 +1100 | [diff] [blame] | 113 | if (!interactive && getenv("DISPLAY")) { |
| 114 | if (getenv(SSH_ASKPASS_ENV)) |
| 115 | askpass = getenv(SSH_ASKPASS_ENV); |
| 116 | else |
| 117 | askpass = SSH_ASKPASS_DEFAULT; |
| 118 | } |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 119 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 120 | /* At first, try empty passphrase */ |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 121 | private = key_new(KEY_RSA); |
| 122 | success = load_private_key(filename, "", private, &comment); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 123 | if (!success) { |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 124 | printf("Need passphrase for %.200s\n", filename); |
| 125 | if (!interactive && askpass == NULL) { |
| 126 | xfree(saved_comment); |
| 127 | return; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 128 | } |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 129 | snprintf(msg, sizeof msg, "Enter passphrase for %.200s", saved_comment); |
| 130 | for (;;) { |
| 131 | char *pass; |
| 132 | if (interactive) { |
| 133 | snprintf(buf, sizeof buf, "%s: ", msg); |
| 134 | pass = read_passphrase(buf, 1); |
| 135 | } else { |
| 136 | pass = ssh_askpass(askpass, msg); |
| 137 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 138 | if (strcmp(pass, "") == 0) { |
| 139 | xfree(pass); |
| 140 | xfree(saved_comment); |
| 141 | return; |
| 142 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 143 | success = load_private_key(filename, pass, private, &comment); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 144 | memset(pass, 0, strlen(pass)); |
| 145 | xfree(pass); |
| 146 | if (success) |
| 147 | break; |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 148 | strlcpy(msg, "Bad passphrase, try again", sizeof msg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 149 | } |
| 150 | } |
| 151 | xfree(saved_comment); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 152 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 153 | if (ssh_add_identity(ac, private->rsa, comment)) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 154 | fprintf(stderr, "Identity added: %s (%s)\n", filename, comment); |
| 155 | else |
| 156 | fprintf(stderr, "Could not add identity: %s\n", filename); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 157 | key_free(private); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 158 | xfree(comment); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | void |
Damien Miller | 10f6f6b | 1999-11-17 17:29:08 +1100 | [diff] [blame] | 162 | list_identities(AuthenticationConnection *ac, int fp) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 163 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 164 | BIGNUM *e, *n; |
| 165 | int status; |
| 166 | char *comment; |
| 167 | int had_identities; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 168 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 169 | e = BN_new(); |
| 170 | n = BN_new(); |
| 171 | had_identities = 0; |
| 172 | for (status = ssh_get_first_identity(ac, e, n, &comment); |
| 173 | status; |
| 174 | status = ssh_get_next_identity(ac, e, n, &comment)) { |
| 175 | unsigned int bits = BN_num_bits(n); |
| 176 | had_identities = 1; |
| 177 | if (fp) { |
| 178 | printf("%d %s %s\n", bits, fingerprint(e, n), comment); |
| 179 | } else { |
| 180 | char *ebuf, *nbuf; |
| 181 | ebuf = BN_bn2dec(e); |
| 182 | if (ebuf == NULL) { |
| 183 | error("list_identities: BN_bn2dec(e) failed."); |
| 184 | } else { |
| 185 | nbuf = BN_bn2dec(n); |
| 186 | if (nbuf == NULL) { |
| 187 | error("list_identities: BN_bn2dec(n) failed."); |
| 188 | } else { |
| 189 | printf("%d %s %s %s\n", bits, ebuf, nbuf, comment); |
| 190 | free(nbuf); |
| 191 | } |
| 192 | free(ebuf); |
| 193 | } |
| 194 | } |
| 195 | xfree(comment); |
Damien Miller | 10f6f6b | 1999-11-17 17:29:08 +1100 | [diff] [blame] | 196 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 197 | BN_clear_free(e); |
| 198 | BN_clear_free(n); |
| 199 | if (!had_identities) |
| 200 | printf("The agent has no identities.\n"); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | int |
Damien Miller | 01ab4a2 | 1999-10-28 15:23:30 +1000 | [diff] [blame] | 204 | main(int argc, char **argv) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 205 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 206 | AuthenticationConnection *ac = NULL; |
| 207 | struct passwd *pw; |
| 208 | char buf[1024]; |
| 209 | int no_files = 1; |
| 210 | int i; |
| 211 | int deleting = 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 212 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 213 | /* check if RSA support exists */ |
| 214 | if (rsa_alive() == 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 215 | fprintf(stderr, |
| 216 | "%s: no RSA support in libssl and libcrypto. See ssl(8).\n", |
| 217 | __progname); |
| 218 | exit(1); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 219 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 220 | /* At first, get a connection to the authentication agent. */ |
| 221 | ac = ssh_get_authentication_connection(); |
| 222 | if (ac == NULL) { |
| 223 | fprintf(stderr, "Could not open a connection to your authentication agent.\n"); |
| 224 | exit(1); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 225 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 226 | for (i = 1; i < argc; i++) { |
| 227 | if ((strcmp(argv[i], "-l") == 0) || |
| 228 | (strcmp(argv[i], "-L") == 0)) { |
| 229 | list_identities(ac, argv[i][1] == 'l' ? 1 : 0); |
| 230 | /* Don't default-add/delete if -l. */ |
| 231 | no_files = 0; |
| 232 | continue; |
| 233 | } |
| 234 | if (strcmp(argv[i], "-d") == 0) { |
| 235 | deleting = 1; |
| 236 | continue; |
| 237 | } |
| 238 | if (strcmp(argv[i], "-D") == 0) { |
| 239 | delete_all(ac); |
| 240 | no_files = 0; |
| 241 | continue; |
| 242 | } |
| 243 | no_files = 0; |
| 244 | if (deleting) |
| 245 | delete_file(ac, argv[i]); |
| 246 | else |
| 247 | add_file(ac, argv[i]); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 248 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 249 | if (no_files) { |
| 250 | pw = getpwuid(getuid()); |
| 251 | if (!pw) { |
| 252 | fprintf(stderr, "No user found with uid %d\n", (int) getuid()); |
| 253 | ssh_close_authentication_connection(ac); |
| 254 | exit(1); |
| 255 | } |
| 256 | snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
| 257 | if (deleting) |
| 258 | delete_file(ac, buf); |
| 259 | else |
| 260 | add_file(ac, buf); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 261 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 262 | ssh_close_authentication_connection(ac); |
| 263 | exit(0); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 264 | } |