X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/065604bbf354dec125255d8fcd388ab368862c6b..aff51935734441207923b8e59fbc3644fc4e7d2c:/ssh-add.c diff --git a/ssh-add.c b/ssh-add.c index 5f1182ec..e7699c95 100644 --- a/ssh-add.c +++ b/ssh-add.c @@ -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 @@ -35,7 +35,7 @@ */ #include "includes.h" -RCSID("$OpenBSD: ssh-add.c,v 1.37 2001/05/02 16:41:20 markus Exp $"); +RCSID("$OpenBSD: ssh-add.c,v 1.69 2003/11/21 11:57:03 djm Exp $"); #include @@ -48,6 +48,7 @@ RCSID("$OpenBSD: ssh-add.c,v 1.37 2001/05/02 16:41:20 markus Exp $"); #include "authfile.h" #include "pathnames.h" #include "readpass.h" +#include "misc.h" #ifdef HAVE___PROGNAME extern char *__progname; @@ -55,9 +56,26 @@ extern char *__progname; char *__progname; #endif +/* argv0 */ +extern char *__progname; + +/* Default files to add */ +static char *default_files[] = { + _PATH_SSH_CLIENT_ID_RSA, + _PATH_SSH_CLIENT_ID_DSA, + _PATH_SSH_CLIENT_IDENTITY, + NULL +}; + +/* Default lifetime (0 == forever) */ +static int lifetime = 0; + +/* User has to confirm key use */ +static int confirm = 0; + /* we keep a cache of one passphrases */ static char *pass = NULL; -void +static void clear_pass(void) { if (pass) { @@ -67,53 +85,61 @@ clear_pass(void) } } -void +static int delete_file(AuthenticationConnection *ac, const char *filename) { Key *public; char *comment = NULL; + int ret = -1; public = key_load_public(filename, &comment); if (public == NULL) { printf("Bad key file %s\n", filename); - return; + 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 identities.\n"); + + return ret; } -void +static int add_file(AuthenticationConnection *ac, const char *filename) { struct stat st; Key *private; char *comment = NULL; char msg[1024]; + int ret = -1; if (stat(filename, &st) < 0) { perror(filename); - exit(1); + return -1; } /* At first, try empty passphrase */ private = key_load_private(filename, "", &comment); @@ -125,32 +151,71 @@ add_file(AuthenticationConnection *ac, const char *filename) if (private == NULL) { /* clear passphrase since it did not work */ clear_pass(); - printf("Need passphrase for %.200s\n", filename); snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ", comment); for (;;) { - pass = read_passphrase(msg, 1); + pass = read_passphrase(msg, RP_ALLOW_STDIN); if (strcmp(pass, "") == 0) { clear_pass(); xfree(comment); - return; + return -1; } private = key_load_private(filename, pass, &comment); if (private != NULL) break; clear_pass(); - strlcpy(msg, "Bad passphrase, try again: ", sizeof msg); + snprintf(msg, sizeof msg, + "Bad passphrase, try again for %.200s: ", comment); } } - if (ssh_add_identity(ac, private, comment)) + + if (ssh_add_identity_constrained(ac, private, comment, lifetime, + confirm)) { fprintf(stderr, "Identity added: %s (%s)\n", filename, comment); - else + ret = 0; + if (lifetime != 0) + fprintf(stderr, + "Lifetime set to %d seconds\n", lifetime); + if (confirm != 0) + fprintf(stderr, + "The user has to confirm each use of the key\n"); + } 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); + + return ret; } -void +static int +update_card(AuthenticationConnection *ac, int add, const char *id) +{ + char *pin; + int ret = -1; + + pin = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN); + if (pin == NULL) + return -1; + + if (ssh_update_card(ac, add, id, pin, lifetime, confirm)) { + fprintf(stderr, "Card %s: %s\n", + add ? "added" : "removed", id); + ret = 0; + } else { + fprintf(stderr, "Could not %s card: %s\n", + add ? "add" : "remove", id); + ret = -1; + } + xfree(pin); + return ret; +} + +static int list_identities(AuthenticationConnection *ac, int do_fp) { Key *key; @@ -160,8 +225,8 @@ list_identities(AuthenticationConnection *ac, int do_fp) 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)) { + key != NULL; + key = ssh_get_next_identity(ac, &comment, version)) { had_identities = 1; if (do_fp) { fp = key_fingerprint(key, SSH_FP_MD5, @@ -178,22 +243,85 @@ list_identities(AuthenticationConnection *ac, int do_fp) xfree(comment); } } - if (!had_identities) + if (!had_identities) { printf("The agent has no identities.\n"); + return -1; + } + return 0; +} + +static int +lock_agent(AuthenticationConnection *ac, int lock) +{ + char prompt[100], *p1, *p2; + int passok = 1, ret = -1; + + strlcpy(prompt, "Enter lock password: ", sizeof(prompt)); + p1 = read_passphrase(prompt, RP_ALLOW_STDIN); + if (lock) { + strlcpy(prompt, "Again: ", sizeof prompt); + p2 = read_passphrase(prompt, RP_ALLOW_STDIN); + if (strcmp(p1, p2) != 0) { + fprintf(stderr, "Passwords do not match.\n"); + passok = 0; + } + memset(p2, 0, strlen(p2)); + xfree(p2); + } + if (passok && ssh_lock_agent(ac, lock, p1)) { + fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un"); + ret = 0; + } else + fprintf(stderr, "Failed to %slock agent.\n", lock ? "" : "un"); + memset(p1, 0, strlen(p1)); + xfree(p1); + return (ret); +} + +static int +do_file(AuthenticationConnection *ac, int deleting, char *file) +{ + if (deleting) { + if (delete_file(ac, file) == -1) + return -1; + } else { + if (add_file(ac, file) == -1) + return -1; + } + return 0; +} + +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"); + fprintf(stderr, " -x Lock agent.\n"); + fprintf(stderr, " -X Unlock agent.\n"); + fprintf(stderr, " -t life Set lifetime (in seconds) when adding identities.\n"); + fprintf(stderr, " -c Require confirmation to sign using 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]); + __progname = ssh_get_progname(argv[0]); init_rng(); + seed_rng(); SSLeay_add_all_algorithms(); @@ -201,46 +329,94 @@ main(int argc, char **argv) ac = ssh_get_authentication_connection(); if (ac == NULL) { fprintf(stderr, "Could not open a connection to your authentication agent.\n"); - exit(1); + exit(2); } - 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, "lLcdDxXe:s:t:")) != -1) { + switch (ch) { + case 'l': + case 'L': + if (list_identities(ac, ch == 'l' ? 1 : 0) == -1) + ret = 1; + goto done; + break; + case 'x': + case 'X': + if (lock_agent(ac, ch == 'x' ? 1 : 0) == -1) + ret = 1; + goto done; + break; + case 'c': + confirm = 1; + 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; + case 't': + if ((lifetime = convtime(optarg)) == -1) { + fprintf(stderr, "Invalid lifetime\n"); + ret = 1; + goto done; + } + 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) { - pw = getpwuid(getuid()); - if (!pw) { + 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) { + char buf[MAXPATHLEN]; + struct passwd *pw; + struct stat st; + int count = 0; + + if ((pw = getpwuid(getuid())) == NULL) { fprintf(stderr, "No user found with uid %u\n", (u_int)getuid()); - ssh_close_authentication_connection(ac); - exit(1); + ret = 1; + goto done; + } + + for(i = 0; default_files[i]; i++) { + snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, + default_files[i]); + if (stat(buf, &st) < 0) + continue; + if (do_file(ac, deleting, buf) == -1) + ret = 1; + else + count++; + } + if (count == 0) + ret = 1; + } else { + for(i = 0; i < argc; i++) { + if (do_file(ac, deleting, argv[i]) == -1) + ret = 1; } - snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, _PATH_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; }