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- /* Copyright (c) 2001 Matej Pfajfar.
- * Copyright (c) 2001-2004, Roger Dingledine.
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2018, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file loadkey.c
- * \brief Read keys from disk, creating as needed
- *
- * This code is shared by relays and onion services, which both need
- * this functionality.
- **/
- #include "core/or/or.h"
- #include "app/config/config.h"
- #include "app/main/main.h"
- #include "feature/keymgt/loadkey.h"
- #include "feature/nodelist/torcert.h"
- #include "lib/crypt_ops/crypto_pwbox.h"
- #include "lib/crypt_ops/crypto_util.h"
- #include "lib/term/getpass.h"
- #include "lib/crypt_ops/crypto_format.h"
- #define ENC_KEY_HEADER "Boxed Ed25519 key"
- #define ENC_KEY_TAG "master"
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- /** Try to read an RSA key from <b>fname</b>. If <b>fname</b> doesn't exist
- * and <b>generate</b> is true, create a new RSA key and save it in
- * <b>fname</b>. Return the read/created key, or NULL on error. Log all
- * errors at level <b>severity</b>. If <b>created_out/b> is non-NULL and a
- * new key was created, set *<b>created_out</b> to true.
- */
- crypto_pk_t *
- init_key_from_file(const char *fname, int generate, int severity,
- bool *created_out)
- {
- crypto_pk_t *prkey = NULL;
- if (created_out) {
- *created_out = false;
- }
- if (!(prkey = crypto_pk_new())) {
- tor_log(severity, LD_GENERAL,"Error constructing key");
- goto error;
- }
- switch (file_status(fname)) {
- case FN_DIR:
- case FN_ERROR:
- tor_log(severity, LD_FS,"Can't read key from \"%s\"", fname);
- goto error;
- /* treat empty key files as if the file doesn't exist, and,
- * if generate is set, replace the empty file in
- * crypto_pk_write_private_key_to_filename() */
- case FN_NOENT:
- case FN_EMPTY:
- if (generate) {
- if (!have_lockfile()) {
- if (try_locking(get_options(), 0)<0) {
- /* Make sure that --list-fingerprint only creates new keys
- * if there is no possibility for a deadlock. */
- tor_log(severity, LD_FS, "Another Tor process has locked \"%s\". "
- "Not writing any new keys.", fname);
- /*XXXX The 'other process' might make a key in a second or two;
- * maybe we should wait for it. */
- goto error;
- }
- }
- log_info(LD_GENERAL, "No key found in \"%s\"; generating fresh key.",
- fname);
- if (crypto_pk_generate_key(prkey)) {
- tor_log(severity, LD_GENERAL,"Error generating onion key");
- goto error;
- }
- if (! crypto_pk_is_valid_private_key(prkey)) {
- tor_log(severity, LD_GENERAL,"Generated key seems invalid");
- goto error;
- }
- log_info(LD_GENERAL, "Generated key seems valid");
- if (created_out) {
- *created_out = true;
- }
- if (crypto_pk_write_private_key_to_filename(prkey, fname)) {
- tor_log(severity, LD_FS,
- "Couldn't write generated key to \"%s\".", fname);
- goto error;
- }
- } else {
- tor_log(severity, LD_GENERAL, "No key found in \"%s\"", fname);
- goto error;
- }
- return prkey;
- case FN_FILE:
- if (crypto_pk_read_private_key_from_filename(prkey, fname)) {
- tor_log(severity, LD_GENERAL,"Error loading private key.");
- goto error;
- }
- return prkey;
- default:
- tor_assert(0);
- }
- error:
- if (prkey)
- crypto_pk_free(prkey);
- return NULL;
- }
- /* DOCDOC */
- static ssize_t
- do_getpass(const char *prompt, char *buf, size_t buflen,
- int twice, const or_options_t *options)
- {
- if (options->keygen_force_passphrase == FORCE_PASSPHRASE_OFF) {
- tor_assert(buflen);
- buf[0] = 0;
- return 0;
- }
- char *prompt2 = NULL;
- char *buf2 = NULL;
- int fd = -1;
- ssize_t length = -1;
- if (options->use_keygen_passphrase_fd) {
- twice = 0;
- fd = options->keygen_passphrase_fd;
- length = read_all_from_fd(fd, buf, buflen-1);
- if (length >= 0)
- buf[length] = 0;
- goto done_reading;
- }
- if (twice) {
- const char msg[] = "One more time:";
- size_t p2len = strlen(prompt) + 1;
- if (p2len < sizeof(msg))
- p2len = sizeof(msg);
- prompt2 = tor_malloc(p2len);
- memset(prompt2, ' ', p2len);
- memcpy(prompt2 + p2len - sizeof(msg), msg, sizeof(msg));
- buf2 = tor_malloc_zero(buflen);
- }
- while (1) {
- length = tor_getpass(prompt, buf, buflen);
- if (length < 0)
- goto done_reading;
- if (! twice)
- break;
- ssize_t length2 = tor_getpass(prompt2, buf2, buflen);
- if (length != length2 || tor_memneq(buf, buf2, length)) {
- fprintf(stderr, "That didn't match.\n");
- } else {
- break;
- }
- }
- done_reading:
- if (twice) {
- tor_free(prompt2);
- memwipe(buf2, 0, buflen);
- tor_free(buf2);
- }
- if (options->keygen_force_passphrase == FORCE_PASSPHRASE_ON && length == 0)
- return -1;
- return length;
- }
- /* DOCDOC */
- int
- read_encrypted_secret_key(ed25519_secret_key_t *out,
- const char *fname)
- {
- int r = -1;
- uint8_t *secret = NULL;
- size_t secret_len = 0;
- char pwbuf[256];
- uint8_t encrypted_key[256];
- char *tag = NULL;
- int saved_errno = 0;
- ssize_t encrypted_len = crypto_read_tagged_contents_from_file(fname,
- ENC_KEY_HEADER,
- &tag,
- encrypted_key,
- sizeof(encrypted_key));
- if (encrypted_len < 0) {
- saved_errno = errno;
- log_info(LD_OR, "%s is missing", fname);
- r = 0;
- goto done;
- }
- if (strcmp(tag, ENC_KEY_TAG)) {
- saved_errno = EINVAL;
- goto done;
- }
- while (1) {
- ssize_t pwlen =
- do_getpass("Enter passphrase for master key:", pwbuf, sizeof(pwbuf), 0,
- get_options());
- if (pwlen < 0) {
- saved_errno = EINVAL;
- goto done;
- }
- const int r_unbox = crypto_unpwbox(&secret, &secret_len,
- encrypted_key, encrypted_len,
- pwbuf, pwlen);
- if (r_unbox == UNPWBOX_CORRUPTED) {
- log_err(LD_OR, "%s is corrupted.", fname);
- saved_errno = EINVAL;
- goto done;
- } else if (r_unbox == UNPWBOX_OKAY) {
- break;
- }
- /* Otherwise, passphrase is bad, so try again till user does ctrl-c or gets
- * it right. */
- }
- if (secret_len != ED25519_SECKEY_LEN) {
- log_err(LD_OR, "%s is corrupted.", fname);
- saved_errno = EINVAL;
- goto done;
- }
- memcpy(out->seckey, secret, ED25519_SECKEY_LEN);
- r = 1;
- done:
- memwipe(encrypted_key, 0, sizeof(encrypted_key));
- memwipe(pwbuf, 0, sizeof(pwbuf));
- tor_free(tag);
- if (secret) {
- memwipe(secret, 0, secret_len);
- tor_free(secret);
- }
- if (saved_errno)
- errno = saved_errno;
- return r;
- }
- /* DOCDOC */
- int
- write_encrypted_secret_key(const ed25519_secret_key_t *key,
- const char *fname)
- {
- int r = -1;
- char pwbuf0[256];
- uint8_t *encrypted_key = NULL;
- size_t encrypted_len = 0;
- if (do_getpass("Enter new passphrase:", pwbuf0, sizeof(pwbuf0), 1,
- get_options()) < 0) {
- log_warn(LD_OR, "NO/failed passphrase");
- return -1;
- }
- if (strlen(pwbuf0) == 0) {
- if (get_options()->keygen_force_passphrase == FORCE_PASSPHRASE_ON)
- return -1;
- else
- return 0;
- }
- if (crypto_pwbox(&encrypted_key, &encrypted_len,
- key->seckey, sizeof(key->seckey),
- pwbuf0, strlen(pwbuf0), 0) < 0) {
- log_warn(LD_OR, "crypto_pwbox failed!?");
- goto done;
- }
- if (crypto_write_tagged_contents_to_file(fname,
- ENC_KEY_HEADER,
- ENC_KEY_TAG,
- encrypted_key, encrypted_len) < 0)
- goto done;
- r = 1;
- done:
- if (encrypted_key) {
- memwipe(encrypted_key, 0, encrypted_len);
- tor_free(encrypted_key);
- }
- memwipe(pwbuf0, 0, sizeof(pwbuf0));
- return r;
- }
- /* DOCDOC */
- static int
- write_secret_key(const ed25519_secret_key_t *key, int encrypted,
- const char *fname,
- const char *fname_tag,
- const char *encrypted_fname)
- {
- if (encrypted) {
- int r = write_encrypted_secret_key(key, encrypted_fname);
- if (r == 1) {
- /* Success! */
- /* Try to unlink the unencrypted key, if any existed before */
- if (strcmp(fname, encrypted_fname))
- unlink(fname);
- return r;
- } else if (r != 0) {
- /* Unrecoverable failure! */
- return r;
- }
- fprintf(stderr, "Not encrypting the secret key.\n");
- }
- return ed25519_seckey_write_to_file(key, fname, fname_tag);
- }
- /**
- * Read an ed25519 key and associated certificates from files beginning with
- * <b>fname</b>, with certificate type <b>cert_type</b>. On failure, return
- * NULL; on success return the keypair.
- *
- * The <b>options</b> is used to look at the change_key_passphrase value when
- * writing to disk a secret key. It is safe to be NULL even in that case.
- *
- * If INIT_ED_KEY_CREATE is set in <b>flags</b>, then create the key (and
- * certificate if requested) if it doesn't exist, and save it to disk.
- *
- * If INIT_ED_KEY_NEEDCERT is set in <b>flags</b>, load/create a certificate
- * too and store it in *<b>cert_out</b>. Fail if the cert can't be
- * found/created. To create a certificate, <b>signing_key</b> must be set to
- * the key that should sign it; <b>now</b> to the current time, and
- * <b>lifetime</b> to the lifetime of the key.
- *
- * If INIT_ED_KEY_REPLACE is set in <b>flags</b>, then create and save new key
- * whether we can read the old one or not.
- *
- * If INIT_ED_KEY_EXTRA_STRONG is set in <b>flags</b>, set the extra_strong
- * flag when creating the secret key.
- *
- * If INIT_ED_KEY_INCLUDE_SIGNING_KEY_IN_CERT is set in <b>flags</b>, and
- * we create a new certificate, create it with the signing key embedded.
- *
- * If INIT_ED_KEY_SPLIT is set in <b>flags</b>, and we create a new key,
- * store the public key in a separate file from the secret key.
- *
- * If INIT_ED_KEY_MISSING_SECRET_OK is set in <b>flags</b>, and we find a
- * public key file but no secret key file, return successfully anyway.
- *
- * If INIT_ED_KEY_OMIT_SECRET is set in <b>flags</b>, do not try to load a
- * secret key unless no public key is found. Do not return a secret key. (but
- * create and save one if needed).
- *
- * If INIT_ED_KEY_TRY_ENCRYPTED is set, we look for an encrypted secret key
- * and consider encrypting any new secret key.
- *
- * If INIT_ED_KEY_NO_REPAIR is set, and there is any issue loading the keys
- * from disk _other than their absence_ (full or partial), we do not try to
- * replace them.
- *
- * If INIT_ED_KEY_SUGGEST_KEYGEN is set, have log messages about failures
- * refer to the --keygen option.
- *
- * If INIT_ED_KEY_EXPLICIT_FNAME is set, use the provided file name for the
- * secret key file, encrypted or not.
- *
- * If INIT_ED_KEY_OFFLINE_SECRET is set, we won't try to load the master
- * secret key and we log a message at <b>severity</b> that we've done so.
- */
- ed25519_keypair_t *
- ed_key_init_from_file(const char *fname, uint32_t flags,
- int severity,
- const ed25519_keypair_t *signing_key,
- time_t now,
- time_t lifetime,
- uint8_t cert_type,
- struct tor_cert_st **cert_out,
- const or_options_t *options)
- {
- char *secret_fname = NULL;
- char *encrypted_secret_fname = NULL;
- char *public_fname = NULL;
- char *cert_fname = NULL;
- const char *loaded_secret_fname = NULL;
- int created_pk = 0, created_sk = 0, created_cert = 0;
- const int try_to_load = ! (flags & INIT_ED_KEY_REPLACE);
- const int encrypt_key = !! (flags & INIT_ED_KEY_TRY_ENCRYPTED);
- const int norepair = !! (flags & INIT_ED_KEY_NO_REPAIR);
- const int split = !! (flags & INIT_ED_KEY_SPLIT);
- const int omit_secret = !! (flags & INIT_ED_KEY_OMIT_SECRET);
- const int offline_secret = !! (flags & INIT_ED_KEY_OFFLINE_SECRET);
- const int explicit_fname = !! (flags & INIT_ED_KEY_EXPLICIT_FNAME);
- /* we don't support setting both of these flags at once. */
- tor_assert((flags & (INIT_ED_KEY_NO_REPAIR|INIT_ED_KEY_NEEDCERT)) !=
- (INIT_ED_KEY_NO_REPAIR|INIT_ED_KEY_NEEDCERT));
- char tag[8];
- tor_snprintf(tag, sizeof(tag), "type%d", (int)cert_type);
- tor_cert_t *cert = NULL;
- char *got_tag = NULL;
- ed25519_keypair_t *keypair = tor_malloc_zero(sizeof(ed25519_keypair_t));
- if (explicit_fname) {
- secret_fname = tor_strdup(fname);
- encrypted_secret_fname = tor_strdup(fname);
- } else {
- tor_asprintf(&secret_fname, "%s_secret_key", fname);
- tor_asprintf(&encrypted_secret_fname, "%s_secret_key_encrypted", fname);
- }
- tor_asprintf(&public_fname, "%s_public_key", fname);
- tor_asprintf(&cert_fname, "%s_cert", fname);
- /* Try to read the secret key. */
- int have_secret = 0;
- int load_secret = try_to_load &&
- !offline_secret &&
- (!omit_secret || file_status(public_fname)==FN_NOENT);
- if (load_secret) {
- int rv = ed25519_seckey_read_from_file(&keypair->seckey,
- &got_tag, secret_fname);
- if (rv == 0) {
- have_secret = 1;
- loaded_secret_fname = secret_fname;
- tor_assert(got_tag);
- } else {
- if (errno != ENOENT && norepair) {
- tor_log(severity, LD_OR, "Unable to read %s: %s", secret_fname,
- strerror(errno));
- goto err;
- }
- }
- }
- /* Should we try for an encrypted key? */
- int have_encrypted_secret_file = 0;
- if (!have_secret && try_to_load && encrypt_key) {
- int r = read_encrypted_secret_key(&keypair->seckey,
- encrypted_secret_fname);
- if (r > 0) {
- have_secret = 1;
- have_encrypted_secret_file = 1;
- tor_free(got_tag); /* convince coverity we aren't leaking */
- got_tag = tor_strdup(tag);
- loaded_secret_fname = encrypted_secret_fname;
- } else if (errno != ENOENT && norepair) {
- tor_log(severity, LD_OR, "Unable to read %s: %s",
- encrypted_secret_fname, strerror(errno));
- goto err;
- }
- } else {
- if (try_to_load) {
- /* Check if it's there anyway, so we don't replace it. */
- if (file_status(encrypted_secret_fname) != FN_NOENT)
- have_encrypted_secret_file = 1;
- }
- }
- if (have_secret) {
- if (strcmp(got_tag, tag)) {
- tor_log(severity, LD_OR, "%s has wrong tag", loaded_secret_fname);
- goto err;
- }
- /* Derive the public key */
- if (ed25519_public_key_generate(&keypair->pubkey, &keypair->seckey)<0) {
- tor_log(severity, LD_OR, "%s can't produce a public key",
- loaded_secret_fname);
- goto err;
- }
- }
- /* If we do split keys here, try to read the pubkey. */
- int found_public = 0;
- if (try_to_load && (!have_secret || split)) {
- ed25519_public_key_t pubkey_tmp;
- tor_free(got_tag);
- found_public = ed25519_pubkey_read_from_file(&pubkey_tmp,
- &got_tag, public_fname) == 0;
- if (!found_public && errno != ENOENT && norepair) {
- tor_log(severity, LD_OR, "Unable to read %s: %s", public_fname,
- strerror(errno));
- goto err;
- }
- if (found_public && strcmp(got_tag, tag)) {
- tor_log(severity, LD_OR, "%s has wrong tag", public_fname);
- goto err;
- }
- if (found_public) {
- if (have_secret) {
- /* If we have a secret key and we're reloading the public key,
- * the key must match! */
- if (! ed25519_pubkey_eq(&keypair->pubkey, &pubkey_tmp)) {
- tor_log(severity, LD_OR, "%s does not match %s! If you are trying "
- "to restore from backup, make sure you didn't mix up the "
- "key files. If you are absolutely sure that %s is the right "
- "key for this relay, delete %s or move it out of the way.",
- public_fname, loaded_secret_fname,
- loaded_secret_fname, public_fname);
- goto err;
- }
- } else {
- /* We only have the public key; better use that. */
- tor_assert(split);
- memcpy(&keypair->pubkey, &pubkey_tmp, sizeof(pubkey_tmp));
- }
- } else {
- /* We have no public key file, but we do have a secret key, make the
- * public key file! */
- if (have_secret) {
- if (ed25519_pubkey_write_to_file(&keypair->pubkey, public_fname, tag)
- < 0) {
- tor_log(severity, LD_OR, "Couldn't repair %s", public_fname);
- goto err;
- } else {
- tor_log(LOG_NOTICE, LD_OR,
- "Found secret key but not %s. Regenerating.",
- public_fname);
- }
- }
- }
- }
- /* If the secret key is absent and it's not allowed to be, fail. */
- if (!have_secret && found_public &&
- !(flags & INIT_ED_KEY_MISSING_SECRET_OK)) {
- if (have_encrypted_secret_file) {
- tor_log(severity, LD_OR, "We needed to load a secret key from %s, "
- "but it was encrypted. Try 'tor --keygen' instead, so you "
- "can enter the passphrase.",
- secret_fname);
- } else if (offline_secret) {
- tor_log(severity, LD_OR, "We wanted to load a secret key from %s, "
- "but you're keeping it offline. (OfflineMasterKey is set.)",
- secret_fname);
- } else {
- tor_log(severity, LD_OR, "We needed to load a secret key from %s, "
- "but couldn't find it. %s", secret_fname,
- (flags & INIT_ED_KEY_SUGGEST_KEYGEN) ?
- "If you're keeping your master secret key offline, you will "
- "need to run 'tor --keygen' to generate new signing keys." :
- "Did you forget to copy it over when you copied the rest of the "
- "signing key material?");
- }
- goto err;
- }
- /* If it's absent, and we're not supposed to make a new keypair, fail. */
- if (!have_secret && !found_public && !(flags & INIT_ED_KEY_CREATE)) {
- if (split) {
- tor_log(severity, LD_OR, "No key found in %s or %s.",
- secret_fname, public_fname);
- } else {
- tor_log(severity, LD_OR, "No key found in %s.", secret_fname);
- }
- goto err;
- }
- /* If the secret key is absent, but the encrypted key would be present,
- * that's an error */
- if (!have_secret && !found_public && have_encrypted_secret_file) {
- tor_assert(!encrypt_key);
- tor_log(severity, LD_OR, "Found an encrypted secret key, "
- "but not public key file %s!", public_fname);
- goto err;
- }
- /* if it's absent, make a new keypair... */
- if (!have_secret && !found_public) {
- tor_free(keypair);
- keypair = ed_key_new(signing_key, flags, now, lifetime,
- cert_type, &cert);
- if (!keypair) {
- tor_log(severity, LD_OR, "Couldn't create keypair");
- goto err;
- }
- created_pk = created_sk = created_cert = 1;
- }
- /* Write it to disk if we're supposed to do with a new passphrase, or if
- * we just created it. */
- if (created_sk || (have_secret && options != NULL &&
- options->change_key_passphrase)) {
- if (write_secret_key(&keypair->seckey,
- encrypt_key,
- secret_fname, tag, encrypted_secret_fname) < 0
- ||
- (split &&
- ed25519_pubkey_write_to_file(&keypair->pubkey, public_fname, tag) < 0)
- ||
- (cert &&
- crypto_write_tagged_contents_to_file(cert_fname, "ed25519v1-cert",
- tag, cert->encoded, cert->encoded_len) < 0)) {
- tor_log(severity, LD_OR, "Couldn't write keys or cert to file.");
- goto err;
- }
- goto done;
- }
- /* If we're not supposed to get a cert, we're done. */
- if (! (flags & INIT_ED_KEY_NEEDCERT))
- goto done;
- /* Read a cert. */
- tor_free(got_tag);
- uint8_t certbuf[256];
- ssize_t cert_body_len = crypto_read_tagged_contents_from_file(
- cert_fname, "ed25519v1-cert",
- &got_tag, certbuf, sizeof(certbuf));
- if (cert_body_len >= 0 && !strcmp(got_tag, tag))
- cert = tor_cert_parse(certbuf, cert_body_len);
- /* If we got it, check it to the extent we can. */
- int bad_cert = 0;
- if (! cert) {
- tor_log(severity, LD_OR, "Cert was unparseable");
- bad_cert = 1;
- } else if (!tor_memeq(cert->signed_key.pubkey, keypair->pubkey.pubkey,
- ED25519_PUBKEY_LEN)) {
- tor_log(severity, LD_OR, "Cert was for wrong key");
- bad_cert = 1;
- } else if (signing_key &&
- tor_cert_checksig(cert, &signing_key->pubkey, now) < 0) {
- tor_log(severity, LD_OR, "Can't check certificate: %s",
- tor_cert_describe_signature_status(cert));
- bad_cert = 1;
- } else if (cert->cert_expired) {
- tor_log(severity, LD_OR, "Certificate is expired");
- bad_cert = 1;
- } else if (signing_key && cert->signing_key_included &&
- ! ed25519_pubkey_eq(&signing_key->pubkey, &cert->signing_key)) {
- tor_log(severity, LD_OR, "Certificate signed by unexpectd key!");
- bad_cert = 1;
- }
- if (bad_cert) {
- tor_cert_free(cert);
- cert = NULL;
- }
- /* If we got a cert, we're done. */
- if (cert)
- goto done;
- /* If we didn't get a cert, and we're not supposed to make one, fail. */
- if (!signing_key || !(flags & INIT_ED_KEY_CREATE)) {
- tor_log(severity, LD_OR, "Without signing key, can't create certificate");
- goto err;
- }
- /* We have keys but not a certificate, so make one. */
- uint32_t cert_flags = 0;
- if (flags & INIT_ED_KEY_INCLUDE_SIGNING_KEY_IN_CERT)
- cert_flags |= CERT_FLAG_INCLUDE_SIGNING_KEY;
- cert = tor_cert_create(signing_key, cert_type,
- &keypair->pubkey,
- now, lifetime,
- cert_flags);
- if (! cert) {
- tor_log(severity, LD_OR, "Couldn't create certificate");
- goto err;
- }
- /* Write it to disk. */
- created_cert = 1;
- if (crypto_write_tagged_contents_to_file(cert_fname, "ed25519v1-cert",
- tag, cert->encoded, cert->encoded_len) < 0) {
- tor_log(severity, LD_OR, "Couldn't write cert to disk.");
- goto err;
- }
- done:
- if (cert_out)
- *cert_out = cert;
- else
- tor_cert_free(cert);
- goto cleanup;
- err:
- if (keypair)
- memwipe(keypair, 0, sizeof(*keypair));
- tor_free(keypair);
- tor_cert_free(cert);
- if (cert_out)
- *cert_out = NULL;
- if (created_sk)
- unlink(secret_fname);
- if (created_pk)
- unlink(public_fname);
- if (created_cert)
- unlink(cert_fname);
- cleanup:
- tor_free(encrypted_secret_fname);
- tor_free(secret_fname);
- tor_free(public_fname);
- tor_free(cert_fname);
- tor_free(got_tag);
- return keypair;
- }
- /**
- * Create a new signing key and (optionally) certficiate; do not read or write
- * from disk. See ed_key_init_from_file() for more information.
- */
- ed25519_keypair_t *
- ed_key_new(const ed25519_keypair_t *signing_key,
- uint32_t flags,
- time_t now,
- time_t lifetime,
- uint8_t cert_type,
- struct tor_cert_st **cert_out)
- {
- if (cert_out)
- *cert_out = NULL;
- const int extra_strong = !! (flags & INIT_ED_KEY_EXTRA_STRONG);
- ed25519_keypair_t *keypair = tor_malloc_zero(sizeof(ed25519_keypair_t));
- if (ed25519_keypair_generate(keypair, extra_strong) < 0)
- goto err;
- if (! (flags & INIT_ED_KEY_NEEDCERT))
- return keypair;
- tor_assert(signing_key);
- tor_assert(cert_out);
- uint32_t cert_flags = 0;
- if (flags & INIT_ED_KEY_INCLUDE_SIGNING_KEY_IN_CERT)
- cert_flags |= CERT_FLAG_INCLUDE_SIGNING_KEY;
- tor_cert_t *cert = tor_cert_create(signing_key, cert_type,
- &keypair->pubkey,
- now, lifetime,
- cert_flags);
- if (! cert)
- goto err;
- *cert_out = cert;
- return keypair;
- err:
- tor_free(keypair);
- return NULL;
- }
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