* 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.
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ *
+ * SSH2 implementation,
+ * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
-RCSID("$Id$");
+RCSID("$OpenBSD: ssh-add.c,v 1.27 2001/01/21 19:05:56 markus Exp $");
+
+#include <openssl/evp.h>
-#include "rsa.h"
#include "ssh.h"
+#include "rsa.h"
+#include "log.h"
#include "xmalloc.h"
+#include "key.h"
#include "authfd.h"
-#include "fingerprint.h"
-
-#ifdef USE_EXTERNAL_ASKPASS
-int askpass(const char *filename, RSA *key, const char *saved_comment, char **comment);
-#endif /* USE_EXTERNAL_ASKPASS */
+#include "authfile.h"
+#include "pathnames.h"
+#include "readpass.h"
#ifdef HAVE___PROGNAME
extern char *__progname;
-#else /* HAVE___PROGNAME */
-const char *__progname = "ssh-add";
-#endif /* HAVE___PROGNAME */
+#else
+char *__progname;
+#endif
void
delete_file(AuthenticationConnection *ac, const char *filename)
{
- RSA *key;
+ Key *public;
char *comment;
- key = RSA_new();
- if (!load_public_key(filename, key, &comment)) {
- printf("Bad key file %s: %s\n", filename, strerror(errno));
- return;
+ 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;
+ }
}
- if (ssh_remove_identity(ac, key))
+ if (ssh_remove_identity(ac, public))
fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment);
else
fprintf(stderr, "Could not remove identity: %s\n", filename);
- RSA_free(key);
+ key_free(public);
xfree(comment);
}
+/* Send a request to remove all identities. */
void
delete_all(AuthenticationConnection *ac)
{
- /* Send a request to remove all identities. */
- if (ssh_remove_all_identities(ac))
+ int success = 1;
+
+ if (!ssh_remove_all_identities(ac, 1))
+ success = 0;
+ /* ignore error-code for ssh2 */
+ ssh_remove_all_identities(ac, 2);
+
+ if (success)
fprintf(stderr, "All identities removed.\n");
else
- fprintf(stderr, "Failed to remove all identitities.\n");
+ fprintf(stderr, "Failed to remove all identities.\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 (fflush(stdout) != 0)
+ error("ssh_askpass: fflush: %s", strerror(errno));
+ 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;
+ 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;
- 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;
+ 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);
+ }
+ key_free(public);
+
+ if (!interactive && getenv("DISPLAY")) {
+ if (getenv(SSH_ASKPASS_ENV))
+ askpass = getenv(SSH_ASKPASS_ENV);
+ else
+ askpass = _PATH_SSH_ASKPASS_DEFAULT;
}
- RSA_free(public_key);
/* At first, try empty passphrase */
- success = load_private_key(filename, "", key, &comment);
+ private = key_new(type);
+ success = load_private_key(filename, "", private, &comment);
if (!success) {
- printf("Need passphrase for %s (%s).\n", filename, saved_comment);
- if (!isatty(STDIN_FILENO)) {
-#ifdef USE_EXTERNAL_ASKPASS
- int prompts = 3;
- while (prompts && !success) {
- success = askpass(filename, key, saved_comment, &comment);
- prompts--;
- }
- if (!success) {
- xfree(saved_comment);
- return;
- }
-#else /* !USE_EXTERNAL_ASKPASS */
- xfree(saved_comment);
- return;
-#endif /* USE_EXTERNAL_ASKPASS */
+ printf("Need passphrase for %.200s\n", filename);
+ if (!interactive && askpass == NULL) {
+ xfree(saved_comment);
+ return;
}
-
- while (!success) {
- char *pass = read_passphrase("Enter passphrase: ", 1);
+ 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);
+ success = load_private_key(filename, pass, private, &comment);
memset(pass, 0, strlen(pass));
xfree(pass);
if (success)
break;
- printf("Bad passphrase.\n");
+ 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);
+ xfree(comment);
+ if (ssh_add_identity(ac, private, saved_comment))
+ fprintf(stderr, "Identity added: %s (%s)\n", filename, saved_comment);
else
fprintf(stderr, "Could not add identity: %s\n", filename);
- RSA_free(key);
- xfree(comment);
+ key_free(private);
+ xfree(saved_comment);
}
void
list_identities(AuthenticationConnection *ac, int fp)
{
- BIGNUM *e, *n;
- int status;
+ Key *key;
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.");
+ int had_identities = 0;
+ int version;
+
+ for (version = 1; version <= 2; version++) {
+ for (key = ssh_get_first_identity(ac, &comment, version);
+ key != NULL;
+ key = ssh_get_next_identity(ac, &comment, version)) {
+ had_identities = 1;
+ if (fp) {
+ printf("%d %s %s (%s)\n",
+ key_size(key), key_fingerprint(key),
+ comment, key_type(key));
} 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);
+ if (!key_write(key, stdout))
+ fprintf(stderr, "key_write failed");
+ fprintf(stdout, " %s\n", comment);
}
+ key_free(key);
+ xfree(comment);
}
- xfree(comment);
}
- BN_clear_free(e);
- BN_clear_free(n);
if (!had_identities)
printf("The agent has no identities.\n");
}
int i;
int deleting = 0;
- /* check if RSA support exists */
- if (rsa_alive() == 0) {
- extern char *__progname;
+ __progname = get_progname(argv[0]);
+ init_rng();
+
+ SSLeay_add_all_algorithms();
- 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) {
if (no_files) {
pw = getpwuid(getuid());
if (!pw) {
- fprintf(stderr, "No user found with uid %d\n", (int) getuid());
+ fprintf(stderr, "No user found with uid %u\n",
+ (u_int)getuid());
ssh_close_authentication_connection(ac);
exit(1);
}
- snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY);
+ snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, _PATH_SSH_CLIENT_IDENTITY);
if (deleting)
delete_file(ac, buf);
else
ssh_close_authentication_connection(ac);
exit(0);
}
-
-#ifdef USE_EXTERNAL_ASKPASS
-int askpass(const char *filename, RSA *key, const char *saved_comment, char **comment)
-{
- int pipes[2];
- char buf[1024];
- int tmp;
- pid_t child;
- FILE *pipef;
-
- /* Check that we are X11-capable */
- if (getenv("DISPLAY") == NULL)
- exit(1);
-
- if (pipe(pipes) == -1) {
- fprintf(stderr, "Creating pipes failed: %s\n", strerror(errno));
- exit(1);
- }
-
- if (fflush(NULL) == EOF) {
- fprintf(stderr, "Cannot flush buffers: %s\n", strerror(errno));
- exit(1);
- }
-
- child = fork();
- if (child == -1) {
- fprintf(stderr, "Cannot fork: %s\n", strerror(errno));
- exit(1);
- }
-
- if (child == 0) {
- /* In child */
-
- close(pipes[0]);
- if (dup2(pipes[1], 1) ==-1) {
- fprintf(stderr, "dup2 failed: %s\n", strerror(errno));
- exit(1);
- }
-
- tmp = snprintf(buf, sizeof(buf), "Need passphrase for %s", saved_comment);
- /* skip the prompt if it won't fit */
- if ((tmp < 0) || (tmp >= sizeof(buf)))
- tmp = execlp(ASKPASS_PROGRAM, "ssh-askpass", 0);
- else
- tmp = execlp(ASKPASS_PROGRAM, "ssh-askpass", buf, 0);
-
- /* Shouldn't get this far */
- fprintf(stderr, "Executing ssh-askpass failed: %s\n", strerror(errno));
- exit(1);
- }
-
- /* In parent */
- close(pipes[1]);
-
- if ((pipef = fdopen(pipes[0], "r")) == NULL) {
- fprintf(stderr, "fdopen failed: %s\n", strerror(errno));
- exit(1);
- }
-
- /* Read passphrase back from child, abort if none presented */
- if(fgets(buf, sizeof(buf), pipef) == NULL)
- exit(1);
-
- fclose(pipef);
-
- if (strchr(buf, '\n'))
- *strchr(buf, '\n') = 0;
-
- if (waitpid(child, NULL, 0) == -1) {
- fprintf(stderr, "Waiting for child failed: %s\n",
- strerror(errno));
- exit(1);
- }
-
- /* Try password as it was presented */
- tmp = load_private_key(filename, buf, key, comment);
-
- memset(buf, 0, sizeof(buf));
-
- return(tmp);
-}
-#endif /* USE_EXTERNAL_ASKPASS */
andersk / openssh.git / blobdiff