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cryptsetup: unset an unlock path on each unlock retry

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If we couldn't unlock a device with the chosen unlock path, let's not
fall back to the lowest one right away, but only flush out one path, and
try the next.

Fixes: #30425
Follow-up-for: #30185
Alternative-to: #33183
This commit is contained in:
Lennart Poettering 2024-06-04 13:53:55 +02:00 committed by Luca Boccassi
parent 80159df741
commit 64f2e1ff05
1 changed files with 42 additions and 12 deletions
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54
src/cryptsetup/cryptsetup.c
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@ -2416,8 +2416,9 @@ static int run(int argc, char *argv[]) {
}
#endif
_cleanup_strv_free_erase_ char **passwords = NULL;
for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) {
_cleanup_strv_free_erase_ char **passwords = NULL;
log_debug("Beginning attempt %u to unlock.", tries);
/* When we were able to acquire multiple keys, let's always process them in this order:
*
@ -2428,7 +2429,9 @@ static int run(int argc, char *argv[]) {
* 5. We enquire the user for a password
*/
if (!key_file && !key_data && !arg_pkcs11_uri && !arg_pkcs11_uri_auto && !arg_fido2_device && !arg_fido2_device_auto && !arg_tpm2_device && !arg_tpm2_device_auto) {
if (!passwords && !key_file && !key_data && !arg_pkcs11_uri && !arg_pkcs11_uri_auto && !arg_fido2_device && !arg_fido2_device_auto && !arg_tpm2_device && !arg_tpm2_device_auto) {
/* If we have nothing to try anymore, then acquire a new password */
if (arg_try_empty_password) {
/* Hmm, let's try an empty password now, but only once */
@ -2465,17 +2468,44 @@ static int run(int argc, char *argv[]) {
if (r != -EAGAIN)
return r;
/* Key not correct? Let's try again! */
/* Key not correct? Let's try again, but let's invalidate one of the passed fields,
* so that we fallback to the next best thing. */
key_file = NULL;
key_data = erase_and_free(key_data);
key_data_size = 0;
arg_pkcs11_uri = mfree(arg_pkcs11_uri);
arg_pkcs11_uri_auto = false;
arg_fido2_device = mfree(arg_fido2_device);
arg_fido2_device_auto = false;
arg_tpm2_device = mfree(arg_tpm2_device);
arg_tpm2_device_auto = false;
if (arg_tpm2_device || arg_tpm2_device_auto) {
arg_tpm2_device = mfree(arg_tpm2_device);
arg_tpm2_device_auto = false;
continue;
}
if (arg_fido2_device || arg_fido2_device_auto) {
arg_fido2_device = mfree(arg_fido2_device);
arg_fido2_device_auto = false;
continue;
}
if (arg_pkcs11_uri || arg_pkcs11_uri_auto) {
arg_pkcs11_uri = mfree(arg_pkcs11_uri);
arg_pkcs11_uri_auto = false;
continue;
}
if (key_data) {
key_data = erase_and_free(key_data);
key_data_size = 0;
continue;
}
if (key_file) {
key_file = NULL;
continue;
}
if (passwords) {
passwords = strv_free_erase(passwords);
continue;
}
log_debug("Prepared for next attempt to unlock.");
}
if (arg_tries != 0 && tries >= arg_tries)