=================================================================== RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/ssh-add.c,v retrieving revision 1.22 retrieving revision 1.22.2.6 diff -u -r1.22 -r1.22.2.6 --- src/usr.bin/ssh/ssh-add.c 2000/09/07 20:27:54 1.22 +++ src/usr.bin/ssh/ssh-add.c 2001/11/15 00:15:00 1.22.2.6 @@ -11,7 +11,7 @@ * 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 @@ -35,177 +35,148 @@ */ #include "includes.h" -RCSID("$OpenBSD: ssh-add.c,v 1.22 2000/09/07 20:27:54 deraadt Exp $"); +RCSID("$OpenBSD: ssh-add.c,v 1.22.2.6 2001/11/15 00:15:00 miod Exp $"); #include -#include -#include -#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" -void +/* argv0 */ +extern char *__progname; + +/* 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_RSA); - if (!load_public_key(filename, public, &comment)) { - key_free(public); - public = key_new(KEY_DSA); - 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"); -} + 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 (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; + 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_RSA; + char *comment = NULL; + char msg[1024]; + int ret = -1; if (stat(filename, &st) < 0) { perror(filename); - exit(1); + return -1; } - /* - * try to load the public key. right now this only works for RSA, - * since DSA keys are fully encrypted - */ - public = key_new(KEY_RSA); - if (!load_public_key(filename, public, &saved_comment)) { - /* ok, so we will asume this is a DSA key */ - type = KEY_DSA; - saved_comment = xstrdup(filename); - } - 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; @@ -214,9 +185,12 @@ key != NULL; key = ssh_get_next_identity(ac, &comment, version)) { had_identities = 1; - if (fp) { - printf("%d %s %s\n", - key_size(key), key_fingerprint(key), comment); + if (do_fp) { + fp = key_fingerprint(key, SSH_FP_MD5, + SSH_FP_HEX); + printf("%d %s %s (%s)\n", + key_size(key), fp, comment, key_type(key)); + xfree(fp); } else { if (!key_write(key, stdout)) fprintf(stderr, "key_write failed"); @@ -230,70 +204,105 @@ 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; - /* check if RSA support exists */ - if (rsa_alive() == 0) { - extern char *__progname; + SSLeay_add_all_algorithms(); - fprintf(stderr, - "%s: no RSA support in libssl and libcrypto. See ssl(8).\n", - __progname); - exit(1); - } - SSLeay_add_all_algorithms(); - /* 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) { + 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; + 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; } - 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) { + 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, SSH_CLIENT_IDENTITY); - if (deleting) - delete_file(ac, buf); - else - add_file(ac, buf); + 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; + } + } } + clear_pass(); + +done: ssh_close_authentication_connection(ac); - exit(0); + return ret; }