mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-09-21 05:26:20 +02:00
Checkpoint work on ed25519 keygen improvements.
Needs changes file, documentation, test integration, more tests.
This commit is contained in:
Nick Mathewson
parent
1ccba302f7
commit
f362e7a873
@ -1912,6 +1912,8 @@ static const struct {
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{ "--dump-config", ARGUMENT_OPTIONAL },
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{ "--list-fingerprint", TAKES_NO_ARGUMENT },
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{ "--keygen", TAKES_NO_ARGUMENT },
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{ "--no-passphrase", TAKES_NO_ARGUMENT },
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{ "--passphrase-fd", ARGUMENT_NECESSARY },
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{ "--verify-config", TAKES_NO_ARGUMENT },
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{ "--ignore-missing-torrc", TAKES_NO_ARGUMENT },
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{ "--quiet", TAKES_NO_ARGUMENT },
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@ -4492,6 +4494,43 @@ options_init_from_torrc(int argc, char **argv)
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retval = options_init_from_string(cf_defaults, cf, command, command_arg,
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&errmsg);
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if (retval < 0)
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goto err;
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if (config_line_find(cmdline_only_options, "--no-passphrase")) {
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if (command == CMD_KEYGEN) {
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get_options_mutable()->keygen_force_passphrase = FORCE_PASSPHRASE_OFF;
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} else {
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log_err(LD_CONFIG, "--no-passphrase specified without --keygen!");
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exit(1);
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}
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}
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{
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const config_line_t *fd_line = config_line_find(cmdline_only_options,
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"--passphrase-fd");
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if (fd_line) {
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if (get_options()->keygen_force_passphrase == FORCE_PASSPHRASE_OFF) {
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log_err(LD_CONFIG, "--no-passphrase specified with --passphrase-fd!");
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exit(1);
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} else if (command != CMD_KEYGEN) {
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log_err(LD_CONFIG, "--passphrase-fd specified without --keygen!");
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exit(1);
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} else {
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const char *v = fd_line->value;
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int ok = 1;
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long fd = tor_parse_long(v, 10, 0, INT_MAX, &ok, NULL);
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if (fd < 0 || ok == 0) {
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log_err(LD_CONFIG, "Invalid --passphrase-fd value %s", escaped(v));
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exit(1);
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}
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get_options_mutable()->keygen_passphrase_fd = (int)fd;
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get_options_mutable()->use_keygen_passphrase_fd = 1;
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get_options_mutable()->keygen_force_passphrase = FORCE_PASSPHRASE_ON;
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}
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}
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}
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err:
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tor_free(cf);
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@ -4292,6 +4292,13 @@ typedef struct {
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/** How long before auth keys expire will we try to make a new one? */
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int TestingAuthKeySlop;
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enum {
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FORCE_PASSPHRASE_AUTO=0,
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FORCE_PASSPHRASE_ON,
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FORCE_PASSPHRASE_OFF
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} keygen_force_passphrase;
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int use_keygen_passphrase_fd;
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int keygen_passphrase_fd;
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} or_options_t;
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/** Persistent state for an onion router, as saved to disk. */
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@ -11,6 +11,72 @@
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#define ENC_KEY_HEADER "Boxed Ed25519 key"
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#define ENC_KEY_TAG "master"
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static ssize_t
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do_getpass(const char *prompt, char *buf, size_t buflen,
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int twice, const or_options_t *options)
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{
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if (options->keygen_force_passphrase == FORCE_PASSPHRASE_OFF) {
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tor_assert(buflen);
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buf[0] = 0;
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return 0;
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}
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char *prompt2 = NULL;
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char *buf2 = NULL;
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int fd = -1;
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ssize_t length = -1;
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if (options->use_keygen_passphrase_fd) {
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twice = 0;
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fd = options->keygen_passphrase_fd;
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length = read_all(fd, buf, buflen-1, 0);
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if (length >= 0)
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buf[length] = 0;
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goto done_reading;
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}
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if (twice) {
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const char msg[] = "One more time:";
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size_t p2len = strlen(prompt) + 1;
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if (p2len < sizeof(msg))
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p2len = sizeof(msg);
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prompt2 = tor_malloc(strlen(prompt)+1);
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memset(prompt2, ' ', p2len);
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memcpy(prompt2 + p2len - sizeof(msg), msg, sizeof(msg));
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buf2 = tor_malloc_zero(buflen);
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}
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while (1) {
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length = tor_getpass(prompt, buf, buflen);
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if (length < 0)
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goto done_reading;
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if (! twice)
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break;
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ssize_t length2 = tor_getpass(prompt2, buf2, buflen);
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if (length != length2 || tor_memneq(buf, buf2, length)) {
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fprintf(stderr, "That didn't match.\n");
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} else {
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break;
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}
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}
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done_reading:
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if (twice) {
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tor_free(prompt2);
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memwipe(buf2, 0, buflen);
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tor_free(buf2);
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}
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if (options->keygen_force_passphrase == FORCE_PASSPHRASE_ON && length == 0)
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return -1;
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return length;
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}
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int
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read_encrypted_secret_key(ed25519_secret_key_t *out,
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const char *fname)
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@ -41,22 +107,24 @@ read_encrypted_secret_key(ed25519_secret_key_t *out,
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while (1) {
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ssize_t pwlen =
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tor_getpass("Enter pasphrase for master key:", pwbuf, sizeof(pwbuf));
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do_getpass("Enter pasphrase for master key:", pwbuf, sizeof(pwbuf), 0,
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get_options());
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if (pwlen < 0) {
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saved_errno = EINVAL;
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goto done;
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}
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const int r = crypto_unpwbox(&secret, &secret_len,
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encrypted_key, encrypted_len,
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pwbuf, pwlen);
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if (r == UNPWBOX_CORRUPTED) {
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log_err(LD_OR, "%s is corrupted.", fname);
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puts("E");
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saved_errno = EINVAL;
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goto done;
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} else if (r == UNPWBOX_OKAY) {
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break;
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}
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/* Otherwise, passphrase is bad, so try again till user does ctrl-c or gets
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* it right. */
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}
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@ -87,22 +155,23 @@ write_encrypted_secret_key(const ed25519_secret_key_t *key,
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const char *fname)
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{
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int r = -1;
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char pwbuf0[256], pwbuf1[256];
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char pwbuf0[256];
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uint8_t *encrypted_key = NULL;
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size_t encrypted_len = 0;
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while (1) {
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if (tor_getpass("Enter passphrase:", pwbuf0, sizeof(pwbuf0)) < 0)
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return -1;
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if (tor_getpass(" One more time:", pwbuf1, sizeof(pwbuf1)) < 0)
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return -1;
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if (!strcmp(pwbuf0, pwbuf1))
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break;
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fprintf(stderr, "That didn't match.\n");
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if (do_getpass("Enter new passphrase:", pwbuf0, sizeof(pwbuf0), 1,
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get_options()) < 0) {
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log_warn(LD_OR, "NO/failed passphrase");
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return -1;
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}
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if (0 == strlen(pwbuf0))
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return 0;
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if (strlen(pwbuf0) == 0) {
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if (get_options()->keygen_force_passphrase == FORCE_PASSPHRASE_ON)
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return -1;
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else
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return 0;
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}
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if (crypto_pwbox(&encrypted_key, &encrypted_len,
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key->seckey, sizeof(key->seckey),
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pwbuf0, strlen(pwbuf0), 0) < 0) {
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@ -121,7 +190,6 @@ write_encrypted_secret_key(const ed25519_secret_key_t *key,
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tor_free(encrypted_key);
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}
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memwipe(pwbuf0, 0, sizeof(pwbuf0));
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memwipe(pwbuf1, 0, sizeof(pwbuf1));
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return r;
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}
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@ -134,7 +202,9 @@ write_secret_key(const ed25519_secret_key_t *key, int encrypted,
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if (encrypted) {
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int r = write_encrypted_secret_key(key, encrypted_fname);
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if (r != 0)
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return r;
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return r; /* Either succeeded or failed unrecoverably */
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fprintf(stderr, "Not encrypting the secret key.\n");
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}
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return ed25519_seckey_write_to_file(key, fname, fname_tag);
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}
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@ -628,6 +698,9 @@ load_ed_keys(const or_options_t *options, time_t now)
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* it, if we loaded it in the first place. */
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memwipe(id->seckey.seckey, 0, sizeof(id->seckey));
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if (options->command == CMD_KEYGEN)
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goto end;
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if (!rsa_ed_crosscert && server_mode(options)) {
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uint8_t *crosscert;
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ssize_t crosscert_len = tor_make_rsa_ed25519_crosscert(&id->pubkey,
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@ -651,6 +724,7 @@ load_ed_keys(const or_options_t *options, time_t now)
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/* We've generated or loaded everything. Put them in memory. */
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end:
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if (! master_identity_key) {
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SET_KEY(master_identity_key, id);
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} else {
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332
src/test/test_keygen.sh
Executable file
332
src/test/test_keygen.sh
Executable file
@ -0,0 +1,332 @@
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#!/bin/sh
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# Note: some of this code is lifted from zero_length_keys.sh, and could be
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# unified.
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umask 077
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set -e
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if [ $# -eq 0 ] || [ ! -f ${1} ] || [ ! -x ${1} ]; then
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echo "Usage: ${0} PATH_TO_TOR [case-number]"
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exit 1
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elif [ $# -ge 1 ]; then
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TOR_BINARY="${1}"
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shift
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if [ $# -ge 1 ]; then
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dflt=0
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else
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dflt=1
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fi
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CASE2A=$dflt
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CASE2B=$dflt
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CASE3A=$dflt
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CASE3B=$dflt
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CASE3C=$dflt
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CASE4=$dflt
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CASE5=$dflt
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CASE6=$dflt
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CASE7=$dflt
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CASE8=$dflt
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CASE9=$dflt
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CASE10=$dflt
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if [ $# -ge 1 ]; then
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eval "CASE${1}"=1
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fi
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fi
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die() { echo "$1" >&2 ; exit 5; }
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check_dir() { [ -d "$1" ] || die "$1 did not exist"; }
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check_file() { [ -e "$1" ] || die "$1 did not exist"; }
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check_no_file() { [ -e "$1" ] && die "$1 was not supposed to exist" || true; }
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check_files_eq() { cmp "$1" "$2" || die "$1 and $2 did not match"; }
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check_keys_eq() { check_files_eq "${SRC}/keys/${1}" "${ME}/keys/${1}"; }
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DATA_DIR=`mktemp -d -t tor_keygen_tests.XXXXXX`
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if [ -z "$DATA_DIR" ]; then
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echo "Failure: mktemp invocation returned empty string" >&2
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exit 3
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fi
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if [ ! -d "$DATA_DIR" ]; then
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echo "Failure: mktemp invocation result doesn't point to directory" >&2
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exit 3
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fi
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trap "rm -rf '$DATA_DIR'" 0
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touch "${DATA_DIR}/empty_torrc"
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TOR="${TOR_BINARY} --hush --DisableNetwork 1 --ShutdownWaitLength 0 --ORPort 12345 --ExitRelay 0 -f ${DATA_DIR}/empty_torrc"
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# Step 1: Start Tor with --list-fingerprint. Make sure everything is there.
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mkdir "${DATA_DIR}/orig"
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${TOR} --DataDirectory "${DATA_DIR}/orig" --list-fingerprint > /dev/null
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check_dir "${DATA_DIR}/orig/keys"
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check_file "${DATA_DIR}/orig/keys/ed25519_master_id_public_key"
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check_file "${DATA_DIR}/orig/keys/ed25519_master_id_secret_key"
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check_file "${DATA_DIR}/orig/keys/ed25519_signing_cert"
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check_file "${DATA_DIR}/orig/keys/ed25519_signing_secret_key"
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# Step 2: Start Tor with --keygen. Make sure everything is there.
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mkdir "${DATA_DIR}/keygen"
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${TOR} --DataDirectory "${DATA_DIR}/keygen" --keygen --no-passphrase
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check_dir "${DATA_DIR}/keygen/keys"
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check_file "${DATA_DIR}/keygen/keys/ed25519_master_id_public_key"
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check_file "${DATA_DIR}/keygen/keys/ed25519_master_id_secret_key"
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check_file "${DATA_DIR}/keygen/keys/ed25519_signing_cert"
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check_file "${DATA_DIR}/keygen/keys/ed25519_signing_secret_key"
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# Step 3: Start Tor with --keygen and a passphrase.
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# Make sure everything is there.
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mkdir "${DATA_DIR}/encrypted"
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echo "passphrase" | ${TOR} --DataDirectory "${DATA_DIR}/encrypted" --keygen --passphrase-fd 0
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check_dir "${DATA_DIR}/encrypted/keys"
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check_file "${DATA_DIR}/encrypted/keys/ed25519_master_id_public_key"
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check_file "${DATA_DIR}/encrypted/keys/ed25519_master_id_secret_key_encrypted"
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check_file "${DATA_DIR}/encrypted/keys/ed25519_signing_cert"
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check_file "${DATA_DIR}/encrypted/keys/ed25519_signing_secret_key"
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echo "KEY GENERATION WAS SUCCESSFUL."
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#
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# The "case X" numbers below come from s7r's email on
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# https://lists.torproject.org/pipermail/tor-dev/2015-August/009204.html
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# Case 2a: Missing secret key, public key exists, start tor.
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if [ "$CASE2A" = 1 ]; then
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ME="${DATA_DIR}/case2a"
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SRC="${DATA_DIR}/orig"
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mkdir -p "${ME}/keys"
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cp "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/"
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${TOR} --DataDirectory "${ME}" --list-fingerprint && die "Somehow succeeded when missing secret key, certs" || true
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check_files_eq "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/ed25519_master_id_public_key"
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echo "==== Case 2A ok"
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fi
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# Case 2b: Encrypted secret key, public key exists, start tor.
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if [ "$CASE2B" = 1 ]; then
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ME="${DATA_DIR}/case2b"
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SRC="${DATA_DIR}/encrypted"
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mkdir -p "${ME}/keys"
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cp "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/"
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cp "${SRC}/keys/ed25519_master_id_secret_key_encrypted" "${ME}/keys/"
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${TOR} --DataDirectory "${ME}" --list-fingerprint && dir "Somehow succeeded with encrypted secret key, missing certs"
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check_files_eq "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/ed25519_master_id_public_key"
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check_files_eq "${SRC}/keys/ed25519_master_id_secret_key_encrypted" "${ME}/keys/ed25519_master_id_secret_key_encrypted"
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echo "==== Case 2B ok"
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fi
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# Case 3a: Start Tor with only master key.
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if [ "$CASE3A" = 1 ]; then
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ME="${DATA_DIR}/case3a"
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SRC="${DATA_DIR}/orig"
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mkdir -p "${ME}/keys"
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cp "${SRC}/keys/ed25519_master_id_"* "${ME}/keys/"
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${TOR} --DataDirectory "${ME}" --list-fingerprint || die "Tor failed when starting with only master key"
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check_files_eq "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/ed25519_master_id_public_key"
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check_files_eq "${SRC}/keys/ed25519_master_id_secret_key" "${ME}/keys/ed25519_master_id_secret_key"
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check_file "${ME}/keys/ed25519_signing_cert"
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check_file "${ME}/keys/ed25519_signing_secret_key"
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echo "==== Case 3A ok"
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fi
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# Case 3b: Call keygen with only unencrypted master key.
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if [ "$CASE3B" = 1 ]; then
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ME="${DATA_DIR}/case3b"
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SRC="${DATA_DIR}/orig"
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mkdir -p "${ME}/keys"
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cp "${SRC}/keys/ed25519_master_id_"* "${ME}/keys/"
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${TOR} --DataDirectory "${ME}" --keygen || die "Keygen failed with only master key"
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check_files_eq "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/ed25519_master_id_public_key"
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check_files_eq "${SRC}/keys/ed25519_master_id_secret_key" "${ME}/keys/ed25519_master_id_secret_key"
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check_file "${ME}/keys/ed25519_signing_cert"
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check_file "${ME}/keys/ed25519_signing_secret_key"
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echo "==== Case 3B ok"
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fi
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# Case 3c: Call keygen with only encrypted master key.
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if [ "$CASE3C" = 1 ]; then
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ME="${DATA_DIR}/case3c"
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SRC="${DATA_DIR}/encrypted"
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mkdir -p "${ME}/keys"
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cp "${SRC}/keys/ed25519_master_id_"* "${ME}/keys/"
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echo "passphrase" | ${TOR} --DataDirectory "${ME}" --keygen --passphrase-fd 0 || die "Keygen failed with only encrypted master key"
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check_files_eq "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/ed25519_master_id_public_key"
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check_files_eq "${SRC}/keys/ed25519_master_id_secret_key_encrypted" "${ME}/keys/ed25519_master_id_secret_key_encrypted"
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check_file "${ME}/keys/ed25519_signing_cert"
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check_file "${ME}/keys/ed25519_signing_secret_key"
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echo "==== Case 3C ok"
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fi
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|
||||
# Case 4: Make a new data directory with only an unencrypted secret key.
|
||||
# Then start tor. The rest should become correct.
|
||||
|
||||
if [ "$CASE4" = 1 ]; then
|
||||
|
||||
ME="${DATA_DIR}/case4"
|
||||
SRC="${DATA_DIR}/orig"
|
||||
|
||||
mkdir -p "${ME}/keys"
|
||||
cp "${SRC}/keys/ed25519_master_id_secret_key" "${ME}/keys/"
|
||||
${TOR} --DataDirectory "${ME}" --list-fingerprint || die "Tor wouldn't start with only unencrypted secret key"
|
||||
check_file "${ME}/keys/ed25519_master_id_public_key"
|
||||
check_file "${ME}/keys/ed25519_master_id_signing_cert"
|
||||
check_file "${ME}/keys/ed25519_master_id_signing_secret_key"
|
||||
${TOR} --DataDirectory "${ME}" --list-fingerprint || die "Tor wouldn't start again after starting once with only unencrypted secret key."
|
||||
|
||||
echo "==== Case 4 ok"
|
||||
|
||||
fi
|
||||
|
||||
# Case 5: Make a new data directory with only an encrypted secret key.
|
||||
|
||||
if [ "$CASE5" = 1 ]; then
|
||||
|
||||
ME="${DATA_DIR}/case5"
|
||||
SRC="${DATA_DIR}/encrypted"
|
||||
|
||||
mkdir -p "${ME}/keys"
|
||||
cp "${SRC}/keys/ed25519_master_id_secret_key_encrypted" "${ME}/keys/"
|
||||
${TOR} --DataDirectory "${ME}" --list-fingerprint || die "Tor wouldn't start with only encrypted secret key"
|
||||
check_files_eq "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/ed25519_master_id_public_key"
|
||||
|
||||
echo "==== Case 5 ok"
|
||||
|
||||
fi
|
||||
|
||||
# Case 6: Make a new data directory with encrypted secret key and public key
|
||||
|
||||
if [ "$CASE6" = 1 ]; then
|
||||
|
||||
ME="${DATA_DIR}/case6"
|
||||
SRC="${DATA_DIR}/encrypted"
|
||||
|
||||
mkdir -p "${ME}/keys"
|
||||
cp "${SRC}/keys/ed25519_master_id_secret_key_encrypted" "${ME}/keys/"
|
||||
cp "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/"
|
||||
${TOR} --DataDirectory "${ME}" --list-fingerprint && die "Tor started with encrypted secret key and no certs" || true
|
||||
check_no_file "${ME}/keys/ed25519_signing_cert"
|
||||
check_no_file "${ME}/keys/ed25519_signing_secret_key"
|
||||
|
||||
echo "==== Case 6 ok"
|
||||
|
||||
fi
|
||||
|
||||
# Case 7: Make a new data directory with unencrypted secret key and
|
||||
# certificates; missing master public.
|
||||
|
||||
if [ "$CASE7" = 1 ]; then
|
||||
|
||||
ME="${DATA_DIR}/case7"
|
||||
SRC="${DATA_DIR}/keygen"
|
||||
|
||||
mkdir -p "${ME}/keys"
|
||||
cp "${SRC}/keys/ed25519_master_id_secret_key" "${ME}/keys/"
|
||||
cp "${SRC}/keys/ed25519_signing_cert" "${ME}/keys/"
|
||||
cp "${SRC}/keys/ed25519_signing_secret_key" "${ME}/keys/"
|
||||
|
||||
${TOR} --DataDirectory "${ME}" --list-fingerprint || die "Failed when starting with missing public key"
|
||||
check_keys_eq ed25519_master_id_secret_key
|
||||
check_keys_eq ed25519_master_id_public_key
|
||||
check_keys_eq ed25519_signing_secret_key
|
||||
check_keys_eq ed25519_signing_cert
|
||||
|
||||
echo "==== Case 7 ok"
|
||||
|
||||
fi
|
||||
|
||||
# Case 8: offline master secret key.
|
||||
|
||||
if [ "$CASE8" = 1 ]; then
|
||||
|
||||
ME="${DATA_DIR}/case8"
|
||||
SRC="${DATA_DIR}/keygen"
|
||||
|
||||
mkdir -p "${ME}/keys"
|
||||
cp "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/"
|
||||
cp "${SRC}/keys/ed25519_signing_cert" "${ME}/keys/"
|
||||
cp "${SRC}/keys/ed25519_signing_secret_key" "${ME}/keys/"
|
||||
|
||||
${TOR} --DataDirectory "${ME}" --list-fingerprint || die "Failed when starting with offline secret key"
|
||||
check_no_file "${ME}/keys/ed25519_master_id_secret_key"
|
||||
check_keys_eq ed25519_master_id_public_key
|
||||
check_keys_eq ed25519_signing_secret_key
|
||||
check_keys_eq ed25519_signing_cert
|
||||
|
||||
echo "==== Case 8 ok"
|
||||
|
||||
fi
|
||||
|
||||
# Case 9: signing cert and secret key provided; could infer master key.
|
||||
|
||||
if [ "$CASE9" = 1 ]; then
|
||||
|
||||
ME="${DATA_DIR}/case9"
|
||||
SRC="${DATA_DIR}/keygen"
|
||||
|
||||
mkdir -p "${ME}/keys"
|
||||
cp "${SRC}/keys/ed25519_signing_cert" "${ME}/keys/"
|
||||
cp "${SRC}/keys/ed25519_signing_secret_key" "${ME}/keys/"
|
||||
|
||||
${TOR} --DataDirectory "${ME}" --list-fingerprint || die "Failed when starting with only signing material"
|
||||
check_no_file "${ME}/keys/ed25519_master_id_secret_key"
|
||||
check_keys_eq ed25519_master_id_public_key
|
||||
check_keys_eq ed25519_signing_secret_key
|
||||
check_keys_eq ed25519_signing_cert
|
||||
|
||||
echo "==== Case 9 ok"
|
||||
|
||||
fi
|
||||
|
||||
|
||||
# Case 10: key mismatch.
|
||||
|
||||
if [ "$CASE10" = 1 ]; then
|
||||
|
||||
ME="${DATA_DIR}/case10"
|
||||
SRC="${DATA_DIR}/keygen"
|
||||
OTHER="${DATA_DIR}/orig"
|
||||
|
||||
mkdir -p "${ME}/keys"
|
||||
cp "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/"
|
||||
cp "${OTHER}/keys/ed25519_master_id_secret_key" "${ME}/keys/"
|
||||
|
||||
${TOR} --DataDirectory "${ME}" --list-fingerprint && die "Successfully started with mismatched keys!?" || true
|
||||
|
||||
echo "==== Case 10 ok"
|
||||
|
||||
fi
|
||||
|
||||
|
||||
# Check cert-only.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user