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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "ask-password-api.h"
#include "cryptenroll-password.h"
#include "env-util.h"
#include "errno-util.h"
#include "escape.h"
#include "iovec-util.h"
#include "memory-util.h"
#include "password-quality-util.h"
#include "strv.h"
int load_volume_key_password(
struct crypt_device *cd,
const char *cd_node,
void *ret_vk,
size_t *ret_vks) {
_cleanup_(erase_and_freep) char *envpw = NULL;
int r;
assert_se(cd);
assert_se(cd_node);
assert_se(ret_vk);
assert_se(ret_vks);
r = getenv_steal_erase("PASSWORD", &envpw);
if (r < 0)
return log_error_errno(r, "Failed to acquire password from environment: %m");
if (r > 0) {
r = crypt_volume_key_get(
cd,
CRYPT_ANY_SLOT,
ret_vk,
ret_vks,
envpw,
strlen(envpw));
if (r < 0)
return log_error_errno(r, "Password from environment variable $PASSWORD did not work: %m");
} else {
AskPasswordFlags ask_password_flags = ASK_PASSWORD_PUSH_CACHE|ASK_PASSWORD_ACCEPT_CACHED;
_cleanup_free_ char *question = NULL, *id = NULL, *disk_path = NULL;
unsigned i = 5;
question = strjoin("Please enter current passphrase for disk ", cd_node, ":");
if (!question)
return log_oom();
disk_path = cescape(cd_node);
if (!disk_path)
return log_oom();
id = strjoin("cryptenroll:", disk_path);
if (!id)
return log_oom();
AskPasswordRequest req = {
.message = question,
.icon = "drive-harddisk",
.id = id,
.keyring = "cryptenroll",
.credential = "cryptenroll.passphrase",
};
for (;;) {
_cleanup_strv_free_erase_ char **passwords = NULL;
if (--i == 0)
return log_error_errno(SYNTHETIC_ERRNO(ENOKEY),
"Too many attempts, giving up.");
r = ask_password_auto(&req, USEC_INFINITY, ask_password_flags, &passwords);
if (r < 0)
return log_error_errno(r, "Failed to query password: %m");
r = -EPERM;
STRV_FOREACH(p, passwords) {
r = crypt_volume_key_get(
cd,
CRYPT_ANY_SLOT,
ret_vk,
ret_vks,
*p,
strlen(*p));
if (r >= 0)
break;
}
if (r >= 0)
break;
log_error_errno(r, "Password not correct, please try again: %m");
ask_password_flags &= ~ASK_PASSWORD_ACCEPT_CACHED;
}
}
return r;
}
int enroll_password(
struct crypt_device *cd,
const struct iovec *volume_key) {
_cleanup_(erase_and_freep) char *new_password = NULL;
_cleanup_free_ char *error = NULL;
const char *node;
int r, keyslot;
assert(cd);
assert(iovec_is_set(volume_key));
assert_se(node = crypt_get_device_name(cd));
r = getenv_steal_erase("NEWPASSWORD", &new_password);
if (r < 0)
return log_error_errno(r, "Failed to acquire password from environment: %m");
if (r == 0) {
_cleanup_free_ char *disk_path = NULL, *id = NULL;
unsigned i = 5;
assert_se(node = crypt_get_device_name(cd));
(void) suggest_passwords();
disk_path = cescape(node);
if (!disk_path)
return log_oom();
id = strjoin("cryptenroll-new:", disk_path);
if (!id)
return log_oom();
AskPasswordRequest req = {
.icon = "drive-harddisk",
.id = id,
.keyring = "cryptenroll",
.credential = "cryptenroll.new-passphrase",
};
for (;;) {
_cleanup_strv_free_erase_ char **passwords = NULL, **passwords2 = NULL;
_cleanup_free_ char *question = NULL;
if (--i == 0)
return log_error_errno(SYNTHETIC_ERRNO(ENOKEY),
"Too many attempts, giving up.");
question = strjoin("Please enter new passphrase for disk ", node, ":");
if (!question)
return log_oom();
req.message = question;
r = ask_password_auto(&req, USEC_INFINITY, /* flags= */ 0, &passwords);
if (r < 0)
return log_error_errno(r, "Failed to query password: %m");
assert(strv_length(passwords) == 1);
free(question);
question = strjoin("Please enter new passphrase for disk ", node, " (repeat):");
if (!question)
return log_oom();
req.message = question;
r = ask_password_auto(&req, USEC_INFINITY, /* flags= */ 0, &passwords2);
if (r < 0)
return log_error_errno(r, "Failed to query password: %m");
assert(strv_length(passwords2) == 1);
if (strv_equal(passwords, passwords2)) {
new_password = passwords2[0];
passwords2 = mfree(passwords2);
break;
}
log_error("Password didn't match, try again.");
}
}
r = check_password_quality(new_password, /* old */ NULL, /* user */ NULL, &error);
if (ERRNO_IS_NEG_NOT_SUPPORTED(r))
log_warning("Password quality check is not supported, proceeding anyway.");
else if (r < 0)
return log_error_errno(r, "Failed to check password quality: %m");
else if (r == 0)
log_warning("Specified password does not pass quality checks (%s), proceeding anyway.", error);
keyslot = crypt_keyslot_add_by_volume_key(
cd,
CRYPT_ANY_SLOT,
volume_key->iov_base,
volume_key->iov_len,
new_password,
strlen(new_password));
if (keyslot < 0)
return log_error_errno(keyslot, "Failed to add new password to %s: %m", node);
log_info("New password enrolled as key slot %i.", keyslot);
return keyslot;
}
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