| /* |
| * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| * All rights reserved |
| * Created: Thu Apr 6 00:52:24 1995 ylo |
| * Adds an identity to the authentication server, or removes an identity. |
| */ |
| |
| #include "includes.h" |
| RCSID("$Id: ssh-add.c,v 1.16 1999/12/06 00:47:29 damien Exp $"); |
| |
| #include "rsa.h" |
| #include "ssh.h" |
| #include "xmalloc.h" |
| #include "authfd.h" |
| #include "fingerprint.h" |
| |
| #ifdef HAVE___PROGNAME |
| extern char *__progname; |
| #else /* HAVE___PROGNAME */ |
| const char *__progname = "ssh-add"; |
| #endif /* HAVE___PROGNAME */ |
| |
| void |
| delete_file(AuthenticationConnection *ac, const char *filename) |
| { |
| RSA *key; |
| char *comment; |
| |
| key = RSA_new(); |
| if (!load_public_key(filename, key, &comment)) { |
| printf("Bad key file %s: %s\n", filename, strerror(errno)); |
| return; |
| } |
| if (ssh_remove_identity(ac, key)) |
| fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment); |
| else |
| fprintf(stderr, "Could not remove identity: %s\n", filename); |
| RSA_free(key); |
| xfree(comment); |
| } |
| |
| void |
| delete_all(AuthenticationConnection *ac) |
| { |
| /* Send a request to remove all identities. */ |
| if (ssh_remove_all_identities(ac)) |
| fprintf(stderr, "All identities removed.\n"); |
| else |
| fprintf(stderr, "Failed to remove all identitities.\n"); |
| } |
| |
| char * |
| ssh_askpass(char *askpass, char *msg) |
| { |
| pid_t pid; |
| size_t len; |
| char *nl, *pass; |
| int p[2], status; |
| char buf[1024]; |
| |
| if (askpass == NULL) |
| fatal("internal error: askpass undefined"); |
| if (pipe(p) < 0) |
| fatal("ssh_askpass: pipe: %s", strerror(errno)); |
| if ((pid = fork()) < 0) |
| fatal("ssh_askpass: fork: %s", strerror(errno)); |
| if (pid == 0) { |
| close(p[0]); |
| if (dup2(p[1], STDOUT_FILENO) < 0) |
| fatal("ssh_askpass: dup2: %s", strerror(errno)); |
| execlp(askpass, askpass, msg, (char *) 0); |
| fatal("ssh_askpass: exec(%s): %s", askpass, strerror(errno)); |
| } |
| close(p[1]); |
| len = read(p[0], buf, sizeof buf); |
| close(p[0]); |
| while (waitpid(pid, &status, 0) < 0) |
| if (errno != EINTR) |
| break; |
| if (len <= 1) |
| return xstrdup(""); |
| nl = strchr(buf, '\n'); |
| if (nl) |
| *nl = '\0'; |
| pass = xstrdup(buf); |
| memset(buf, 0, sizeof(buf)); |
| return pass; |
| } |
| |
| void |
| add_file(AuthenticationConnection *ac, const char *filename) |
| { |
| RSA *key; |
| RSA *public_key; |
| char *saved_comment, *comment, *askpass = NULL; |
| char buf[1024], msg[1024]; |
| int success; |
| int interactive = isatty(STDIN_FILENO); |
| |
| key = RSA_new(); |
| public_key = RSA_new(); |
| if (!load_public_key(filename, public_key, &saved_comment)) { |
| printf("Bad key file %s: %s\n", filename, strerror(errno)); |
| return; |
| } |
| RSA_free(public_key); |
| |
| if (!interactive && getenv("DISPLAY")) { |
| if (getenv(SSH_ASKPASS_ENV)) |
| askpass = getenv(SSH_ASKPASS_ENV); |
| else |
| askpass = SSH_ASKPASS_DEFAULT; |
| } |
| |
| /* At first, try empty passphrase */ |
| success = load_private_key(filename, "", key, &comment); |
| if (!success) { |
| printf("Need passphrase for %.200s\n", filename); |
| if (!interactive && askpass == NULL) { |
| xfree(saved_comment); |
| return; |
| } |
| snprintf(msg, sizeof msg, "Enter passphrase for %.200s", saved_comment); |
| for (;;) { |
| char *pass; |
| if (interactive) { |
| snprintf(buf, sizeof buf, "%s: ", msg); |
| pass = read_passphrase(buf, 1); |
| } else { |
| pass = ssh_askpass(askpass, msg); |
| } |
| if (strcmp(pass, "") == 0) { |
| xfree(pass); |
| xfree(saved_comment); |
| return; |
| } |
| success = load_private_key(filename, pass, key, &comment); |
| memset(pass, 0, strlen(pass)); |
| xfree(pass); |
| if (success) |
| break; |
| strlcpy(msg, "Bad passphrase, try again", sizeof msg); |
| } |
| } |
| xfree(saved_comment); |
| |
| if (ssh_add_identity(ac, key, comment)) |
| fprintf(stderr, "Identity added: %s (%s)\n", filename, comment); |
| else |
| fprintf(stderr, "Could not add identity: %s\n", filename); |
| RSA_free(key); |
| xfree(comment); |
| } |
| |
| void |
| list_identities(AuthenticationConnection *ac, int fp) |
| { |
| BIGNUM *e, *n; |
| int status; |
| char *comment; |
| int had_identities; |
| |
| e = BN_new(); |
| n = BN_new(); |
| had_identities = 0; |
| for (status = ssh_get_first_identity(ac, e, n, &comment); |
| status; |
| status = ssh_get_next_identity(ac, e, n, &comment)) { |
| unsigned int bits = BN_num_bits(n); |
| had_identities = 1; |
| if (fp) { |
| printf("%d %s %s\n", bits, fingerprint(e, n), comment); |
| } else { |
| char *ebuf, *nbuf; |
| ebuf = BN_bn2dec(e); |
| if (ebuf == NULL) { |
| error("list_identities: BN_bn2dec(e) failed."); |
| } else { |
| nbuf = BN_bn2dec(n); |
| if (nbuf == NULL) { |
| error("list_identities: BN_bn2dec(n) failed."); |
| } else { |
| printf("%d %s %s %s\n", bits, ebuf, nbuf, comment); |
| free(nbuf); |
| } |
| free(ebuf); |
| } |
| } |
| xfree(comment); |
| } |
| BN_clear_free(e); |
| BN_clear_free(n); |
| if (!had_identities) |
| printf("The agent has no identities.\n"); |
| } |
| |
| int |
| main(int argc, char **argv) |
| { |
| AuthenticationConnection *ac = NULL; |
| struct passwd *pw; |
| char buf[1024]; |
| int no_files = 1; |
| int i; |
| int deleting = 0; |
| |
| /* check if RSA support exists */ |
| if (rsa_alive() == 0) { |
| fprintf(stderr, |
| "%s: no RSA support in libssl and libcrypto. See ssl(8).\n", |
| __progname); |
| exit(1); |
| } |
| /* At first, get a connection to the authentication agent. */ |
| ac = ssh_get_authentication_connection(); |
| if (ac == NULL) { |
| fprintf(stderr, "Could not open a connection to your authentication agent.\n"); |
| exit(1); |
| } |
| for (i = 1; i < argc; i++) { |
| if ((strcmp(argv[i], "-l") == 0) || |
| (strcmp(argv[i], "-L") == 0)) { |
| list_identities(ac, argv[i][1] == 'l' ? 1 : 0); |
| /* Don't default-add/delete if -l. */ |
| no_files = 0; |
| continue; |
| } |
| if (strcmp(argv[i], "-d") == 0) { |
| deleting = 1; |
| continue; |
| } |
| if (strcmp(argv[i], "-D") == 0) { |
| delete_all(ac); |
| no_files = 0; |
| continue; |
| } |
| no_files = 0; |
| if (deleting) |
| delete_file(ac, argv[i]); |
| else |
| add_file(ac, argv[i]); |
| } |
| if (no_files) { |
| pw = getpwuid(getuid()); |
| if (!pw) { |
| fprintf(stderr, "No user found with uid %d\n", (int) getuid()); |
| ssh_close_authentication_connection(ac); |
| exit(1); |
| } |
| snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
| if (deleting) |
| delete_file(ac, buf); |
| else |
| add_file(ac, buf); |
| } |
| ssh_close_authentication_connection(ac); |
| exit(0); |
| } |