* called by a name other than "ssh" or "Secure Shell".
*
* SSH2 implementation,
- * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
*/
#include "includes.h"
-RCSID("$OpenBSD: ssh-add.c,v 1.23 2000/11/12 19:50:38 markus Exp $");
+RCSID("$OpenBSD: ssh-add.c,v 1.46 2001/10/02 08:38:50 djm Exp $");
#include <openssl/evp.h>
-#include <openssl/rsa.h>
-#include <openssl/dsa.h>
-#include "rsa.h"
#include "ssh.h"
+#include "rsa.h"
+#include "log.h"
#include "xmalloc.h"
#include "key.h"
#include "authfd.h"
#include "authfile.h"
+#include "pathnames.h"
+#include "readpass.h"
#ifdef HAVE___PROGNAME
extern char *__progname;
-#else /* HAVE___PROGNAME */
-static const char *__progname = "ssh-add";
-#endif /* HAVE___PROGNAME */
+#else
+char *__progname;
+#endif
+
+/* argv0 */
+extern char *__progname;
-void
+/* we keep a cache of one passphrases */
+static char *pass = NULL;
+static void
+clear_pass(void)
+{
+ if (pass) {
+ memset(pass, 0, strlen(pass));
+ xfree(pass);
+ pass = NULL;
+ }
+}
+
+static int
delete_file(AuthenticationConnection *ac, const char *filename)
{
Key *public;
- char *comment;
+ char *comment = NULL;
+ int ret = -1;
- public = key_new(KEY_RSA1);
- if (!load_public_key(filename, public, &comment)) {
- key_free(public);
- public = key_new(KEY_UNSPEC);
- if (!try_load_public_key(filename, public, &comment)) {
- printf("Bad key file %s\n", filename);
- return;
- }
+ public = key_load_public(filename, &comment);
+ if (public == NULL) {
+ printf("Bad key file %s\n", filename);
+ return -1;
}
- if (ssh_remove_identity(ac, public))
+ if (ssh_remove_identity(ac, public)) {
fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment);
- else
+ ret = 0;
+ } else
fprintf(stderr, "Could not remove identity: %s\n", filename);
+
key_free(public);
xfree(comment);
+
+ return ret;
}
/* Send a request to remove all identities. */
-void
+static int
delete_all(AuthenticationConnection *ac)
{
- int success = 1;
+ int ret = -1;
- if (!ssh_remove_all_identities(ac, 1))
- success = 0;
+ if (ssh_remove_all_identities(ac, 1))
+ ret = 0;
/* ignore error-code for ssh2 */
ssh_remove_all_identities(ac, 2);
- if (success)
+ if (ret == 0)
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];
+ fprintf(stderr, "Failed to remove all identities.\n");
- 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]);
- buf[0] = '\0';
- atomicio(read, p[0], buf, sizeof buf);
- len = strlen(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;
+ return ret;
}
-void
+static int
add_file(AuthenticationConnection *ac, const char *filename)
{
struct stat st;
- Key *public;
Key *private;
- char *saved_comment, *comment, *askpass = NULL;
- char buf[1024], msg[1024];
- int success;
- int interactive = isatty(STDIN_FILENO);
- int type = KEY_RSA1;
+ char *comment = NULL;
+ char msg[1024];
+ int ret = -1;
if (stat(filename, &st) < 0) {
perror(filename);
- exit(1);
- }
- /*
- * try to load the public key. right now this only works for RSA,
- * since DSA keys are fully encrypted
- */
- public = key_new(KEY_RSA1);
- if (!load_public_key(filename, public, &saved_comment)) {
- /* ok, so we will assume this is 'some' key */
- type = KEY_UNSPEC;
- saved_comment = xstrdup(filename);
+ return -1;
}
- key_free(public);
-
- if (!interactive && getenv("DISPLAY")) {
- if (getenv(SSH_ASKPASS_ENV))
- askpass = getenv(SSH_ASKPASS_ENV);
- else
- askpass = SSH_ASKPASS_DEFAULT;
- }
-
/* At first, try empty passphrase */
- private = key_new(type);
- success = load_private_key(filename, "", private, &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);
+ private = key_load_private(filename, "", &comment);
+ if (comment == NULL)
+ comment = xstrdup(filename);
+ /* try last */
+ if (private == NULL && pass != NULL)
+ private = key_load_private(filename, pass, NULL);
+ if (private == NULL) {
+ /* clear passphrase since it did not work */
+ clear_pass();
+ snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ",
+ comment);
for (;;) {
- char *pass;
- if (interactive) {
- snprintf(buf, sizeof buf, "%s: ", msg);
- pass = read_passphrase(buf, 1);
- } else {
- pass = ssh_askpass(askpass, msg);
- }
+ pass = read_passphrase(msg, RP_ALLOW_STDIN);
if (strcmp(pass, "") == 0) {
- xfree(pass);
- xfree(saved_comment);
- return;
+ clear_pass();
+ xfree(comment);
+ return -1;
}
- success = load_private_key(filename, pass, private, &comment);
- memset(pass, 0, strlen(pass));
- xfree(pass);
- if (success)
+ private = key_load_private(filename, pass, &comment);
+ if (private != NULL)
break;
- strlcpy(msg, "Bad passphrase, try again", sizeof msg);
+ clear_pass();
+ strlcpy(msg, "Bad passphrase, try again: ", sizeof msg);
}
}
- xfree(comment);
- if (ssh_add_identity(ac, private, saved_comment))
- fprintf(stderr, "Identity added: %s (%s)\n", filename, saved_comment);
- else
+ if (ssh_add_identity(ac, private, comment)) {
+ fprintf(stderr, "Identity added: %s (%s)\n", filename, comment);
+ ret = 0;
+ } else
fprintf(stderr, "Could not add identity: %s\n", filename);
+
+ xfree(comment);
key_free(private);
- xfree(saved_comment);
+
+ return ret;
}
-void
-list_identities(AuthenticationConnection *ac, int fp)
+static int
+update_card(AuthenticationConnection *ac, int add, const char *id)
+{
+ if (ssh_update_card(ac, add, id)) {
+ fprintf(stderr, "Card %s: %s\n",
+ add ? "added" : "removed", id);
+ return 0;
+ } else {
+ fprintf(stderr, "Could not %s card: %s\n",
+ add ? "add" : "remove", id);
+ return -1;
+ }
+}
+
+static void
+list_identities(AuthenticationConnection *ac, int do_fp)
{
Key *key;
- char *comment;
+ char *comment, *fp;
int had_identities = 0;
int version;
key != NULL;
key = ssh_get_next_identity(ac, &comment, version)) {
had_identities = 1;
- if (fp) {
+ if (do_fp) {
+ fp = key_fingerprint(key, SSH_FP_MD5,
+ SSH_FP_HEX);
printf("%d %s %s (%s)\n",
- key_size(key), key_fingerprint(key),
- comment, key_type(key));
+ key_size(key), fp, comment, key_type(key));
+ xfree(fp);
} else {
if (!key_write(key, stdout))
fprintf(stderr, "key_write failed");
printf("The agent has no identities.\n");
}
+static void
+usage(void)
+{
+ fprintf(stderr, "Usage: %s [options]\n", __progname);
+ fprintf(stderr, "Options:\n");
+ fprintf(stderr, " -l List fingerprints of all identities.\n");
+ fprintf(stderr, " -L List public key parameters of all identities.\n");
+ fprintf(stderr, " -d Delete identity.\n");
+ fprintf(stderr, " -D Delete all identities.\n");
+#ifdef SMARTCARD
+ fprintf(stderr, " -s reader Add key in smartcard reader.\n");
+ fprintf(stderr, " -e reader Remove key in smartcard reader.\n");
+#endif
+}
+
int
main(int argc, char **argv)
{
+ extern char *optarg;
+ extern int optind;
AuthenticationConnection *ac = NULL;
struct passwd *pw;
char buf[1024];
- int no_files = 1;
- int i;
- int deleting = 0;
+ char *sc_reader_id = NULL;
+ int i, ch, deleting = 0, ret = 0;
+ __progname = get_progname(argv[0]);
init_rng();
+ seed_rng();
- SSLeay_add_all_algorithms();
+ SSLeay_add_all_algorithms();
/* At first, get a connection to the authentication agent. */
ac = ssh_get_authentication_connection();
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) {
+ while ((ch = getopt(argc, argv, "lLdDe:s:")) != -1) {
+ switch (ch) {
+ case 'l':
+ case 'L':
+ list_identities(ac, ch == 'l' ? 1 : 0);
+ goto done;
+ break;
+ case 'd':
deleting = 1;
- continue;
- }
- if (strcmp(argv[i], "-D") == 0) {
- delete_all(ac);
- no_files = 0;
- continue;
+ break;
+ case 'D':
+ if (delete_all(ac) == -1)
+ ret = 1;
+ goto done;
+ break;
+ case 's':
+ sc_reader_id = optarg;
+ break;
+ case 'e':
+ deleting = 1;
+ sc_reader_id = optarg;
+ break;
+ default:
+ usage();
+ ret = 1;
+ goto done;
}
- no_files = 0;
- if (deleting)
- delete_file(ac, argv[i]);
- else
- add_file(ac, argv[i]);
}
- if (no_files) {
+ argc -= optind;
+ argv += optind;
+ if (sc_reader_id != NULL) {
+ if (update_card(ac, !deleting, sc_reader_id) == -1)
+ ret = 1;
+ goto done;
+ }
+ if (argc == 0) {
pw = getpwuid(getuid());
if (!pw) {
fprintf(stderr, "No user found with uid %u\n",
(u_int)getuid());
- ssh_close_authentication_connection(ac);
- exit(1);
+ ret = 1;
+ goto done;
+ }
+ snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, _PATH_SSH_CLIENT_IDENTITY);
+ if (deleting) {
+ if (delete_file(ac, buf) == -1)
+ ret = 1;
+ } else {
+ if (add_file(ac, buf) == -1)
+ ret = 1;
+ }
+ } else {
+ for (i = 0; i < argc; i++) {
+ if (deleting) {
+ if (delete_file(ac, argv[i]) == -1)
+ ret = 1;
+ } else {
+ if (add_file(ac, argv[i]) == -1)
+ ret = 1;
+ }
}
- snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY);
- if (deleting)
- delete_file(ac, buf);
- else
- add_file(ac, buf);
}
+ clear_pass();
+
+done:
ssh_close_authentication_connection(ac);
- exit(0);
+ return ret;
}