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/*
ssh-add.c
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 1.4 1999/09/29 21:14:16 deraadt Exp $");
#include "rsa.h"
#include "ssh.h"
#include "xmalloc.h"
#include "authfd.h"
void
delete_file(const char *filename)
{
RSA *key;
char *comment;
AuthenticationConnection *ac;
key = RSA_new();
if (!load_public_key(filename, key, &comment))
{
printf("Bad key file %s: %s\n", filename, strerror(errno));
return;
}
/* Send the request to the authentication agent. */
ac = ssh_get_authentication_connection();
if (!ac)
{
fprintf(stderr,
"Could not open a connection to your authentication agent.\n");
RSA_free(key);
xfree(comment);
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);
ssh_close_authentication_connection(ac);
}
void
delete_all()
{
AuthenticationConnection *ac;
/* Get a connection to the agent. */
ac = ssh_get_authentication_connection();
if (!ac)
{
fprintf(stderr,
"Could not open a connection to your authentication agent.\n");
return;
}
/* 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");
/* Close the connection to the agent. */
ssh_close_authentication_connection(ac);
}
void
add_file(const char *filename)
{
RSA *key;
RSA *public_key;
AuthenticationConnection *ac;
char *saved_comment, *comment, *pass;
int first;
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);
pass = xstrdup("");
first = 1;
while (!load_private_key(filename, pass, key, &comment))
{
char buf[1024];
FILE *f;
/* Free the old passphrase. */
memset(pass, 0, strlen(pass));
xfree(pass);
/* Ask for a passphrase. */
if (getenv("DISPLAY") && !isatty(fileno(stdin)))
{
snprintf(buf, sizeof buf,
"ssh-askpass '%sEnter passphrase for %.100s'",
first ? "" : "You entered wrong passphrase. ",
saved_comment);
f = popen(buf, "r");
if (!fgets(buf, sizeof(buf), f))
{
pclose(f);
xfree(saved_comment);
return;
}
pclose(f);
if (strchr(buf, '\n'))
*strchr(buf, '\n') = 0;
pass = xstrdup(buf);
}
else
{
if (first)
printf("Need passphrase for %s (%s).\n", filename, saved_comment);
else
printf("Bad passphrase.\n");
pass = read_passphrase("Enter passphrase: ", 1);
if (strcmp(pass, "") == 0)
{
xfree(saved_comment);
xfree(pass);
return;
}
}
first = 0;
}
memset(pass, 0, strlen(pass));
xfree(pass);
xfree(saved_comment);
/* Send the key to the authentication agent. */
ac = ssh_get_authentication_connection();
if (!ac)
{
fprintf(stderr,
"Could not open a connection to your authentication agent.\n");
RSA_free(key);
xfree(comment);
return;
}
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);
ssh_close_authentication_connection(ac);
}
void
list_identities()
{
AuthenticationConnection *ac;
BIGNUM *e, *n;
int bits, status;
char *comment;
int had_identities;
ac = ssh_get_authentication_connection();
if (!ac)
{
fprintf(stderr, "Could not connect to authentication server.\n");
return;
}
e = BN_new();
n = BN_new();
had_identities = 0;
for (status = ssh_get_first_identity(ac, &bits, e, n, &comment);
status;
status = ssh_get_next_identity(ac, &bits, e, n, &comment))
{
char *buf;
had_identities = 1;
printf("%d ", bits);
buf = BN_bn2dec(e);
assert(buf != NULL);
printf("%s ", buf);
free (buf);
buf = BN_bn2dec(n);
assert(buf != NULL);
printf("%s %s\n", buf, comment);
free (buf);
xfree(comment);
}
BN_clear_free(e);
BN_clear_free(n);
if (!had_identities)
printf("The agent has no identities.\n");
ssh_close_authentication_connection(ac);
}
int
main(int ac, char **av)
{
struct passwd *pw;
char buf[1024];
int no_files = 1;
int i;
int deleting = 0;
/* check if RSA support exists */
if (rsa_alive() == 0) {
extern char *__progname;
fprintf(stderr,
"%s: no RSA support in libssl and libcrypto. See ssl(8).\n",
__progname);
exit(1);
}
for (i = 1; i < ac; i++)
{
if (strcmp(av[i], "-l") == 0)
{
list_identities();
no_files = 0; /* Don't default-add/delete if -l. */
continue;
}
if (strcmp(av[i], "-d") == 0)
{
deleting = 1;
continue;
}
if (strcmp(av[i], "-D") == 0)
{
delete_all();
no_files = 0;
continue;
}
no_files = 0;
if (deleting)
delete_file(av[i]);
else
add_file(av[i]);
}
if (no_files)
{
pw = getpwuid(getuid());
if (!pw)
{
fprintf(stderr, "No user found with uid %d\n", (int)getuid());
exit(1);
}
snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY);
if (deleting)
delete_file(buf);
else
add_file(buf);
}
exit(0);
}
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