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cryptsetup: properly parse cipher= switch

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This commit is contained in:
Lennart Poettering 2010-11-14 02:01:29 +01:00
parent 260ab28795
commit e2d480b9d1
1 changed files with 21 additions and 15 deletions
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36
src/cryptsetup.c
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@ -30,7 +30,6 @@
static const char *opt_type = NULL; /* LUKS1 or PLAIN */
static char *opt_cipher = NULL;
static char *opt_cipher_mode = NULL;
static unsigned opt_key_size = 0;
static char *opt_hash = NULL;
static unsigned opt_tries = 0;
@ -70,15 +69,6 @@ static int parse_one_option(const char *option) {
free(opt_hash);
opt_hash = t;
} else if (startswith(option, "mode=")) {
char *t;
if (!(t = strdup(option+5)))
return -ENOMEM;
free(opt_cipher_mode);
opt_cipher_mode = t;
} else if (startswith(option, "tries=")) {
if (safe_atou(option+6, &opt_tries) < 0) {
@ -140,9 +130,8 @@ static void log_glue(int level, const char *msg, void *usrptr) {
int main(int argc, char *argv[]) {
int r = EXIT_FAILURE;
struct crypt_device *cd = NULL;
char *password = NULL;
char *password = NULL, *truncated_cipher = NULL;
const char *cipher = NULL, *cipher_mode = NULL, *hash = NULL;
crypt_status_info status;
if (argc < 3) {
log_error("This program requires at least two arguments.");
@ -159,6 +148,7 @@ int main(int argc, char *argv[]) {
unsigned try;
const char *key_file = NULL;
usec_t until;
crypt_status_info status;
if (argc < 4) {
log_error("attach requires at least two arguments.");
@ -197,10 +187,25 @@ int main(int argc, char *argv[]) {
opt_tries = opt_tries > 0 ? opt_tries : 3;
opt_key_size = (opt_key_size > 0 ? opt_key_size : 256);
cipher = opt_cipher ? opt_cipher : "aes";
cipher_mode = opt_cipher_mode ? opt_cipher_mode : "cbc-essiv:sha256";
hash = opt_hash ? opt_hash : "ripemd160";
if (opt_cipher) {
size_t l;
l = strcspn(opt_cipher, "-");
if (!(truncated_cipher = strndup(opt_cipher, l))) {
log_error("Out of memory");
goto finish;
}
cipher = truncated_cipher;
cipher_mode = opt_cipher[l] ? opt_cipher+l+1 : "plain";
} else {
cipher = "aes";
cipher_mode = "cbc-essiv:sha256";
}
for (try = 0; try < opt_tries; try++) {
bool pass_volume_key = false;
@ -335,9 +340,10 @@ finish:
crypt_free(cd);
free(opt_cipher);
free(opt_cipher_mode);
free(opt_hash);
free(truncated_cipher);
free(password);
return r;