cryptsetup: fix inverted comparison in pass_volume_key

[elogind.git] / src / cryptsetup / cryptsetup.c

diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
index f570724b9d8c0105d26c12715e0a3521c42b55b4..56a3b50974671114551ab1ef58a1048a68a09215 100644 (file)
--- a/src/cryptsetup/cryptsetup.c
+++ b/src/cryptsetup/cryptsetup.c
@@ -37,6 +37,7 @@
 static const char *opt_type = NULL; /* LUKS1 or PLAIN */
 static char *opt_cipher = NULL;
 static unsigned opt_key_size = 0;
+static unsigned opt_keyfile_size = 0;
 static unsigned opt_keyfile_offset = 0;
 static char *opt_hash = NULL;
 static unsigned opt_tries = 0;
@@ -80,6 +81,13 @@ static int parse_one_option(const char *option) {
                         return 0;
                 }
 
+        } else if (startswith(option, "keyfile-size=")) {
+
+                if (safe_atou(option+13, &opt_keyfile_size) < 0) {
+                        log_error("keyfile-size= parse failure, ignoring.");
+                        return 0;
+                }
+
         } else if (startswith(option, "keyfile-offset=")) {
 
                 if (safe_atou(option+15, &opt_keyfile_offset) < 0) {
@@ -238,7 +246,6 @@ int main(int argc, char *argv[]) {
         char **passwords = NULL, *truncated_cipher = NULL;
         const char *cipher = NULL, *cipher_mode = NULL, *hash = NULL, *name = NULL;
         char *description = NULL, *name_buffer = NULL, *mount_point = NULL;
-        unsigned keyfile_size = 0;
 
         if (argc <= 1) {
                 help();
@@ -335,7 +342,12 @@ 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);
-                hash = opt_hash ? opt_hash : "ripemd160";
+                if (opt_hash) {
+                        /* plain isn't a real hash type. it just means "use no hash" */
+                        if (!streq(opt_hash, "plain"))
+                                hash = opt_hash;
+                } else
+                        hash = "ripemd160";
 
                 if (opt_cipher) {
                         size_t l;
@@ -343,7 +355,7 @@ int main(int argc, char *argv[]) {
                         l = strcspn(opt_cipher, "-");
 
                         if (!(truncated_cipher = strndup(opt_cipher, l))) {
-                                log_error("Out of memory");
+                                log_oom();
                                 goto finish;
                         }
 
@@ -365,7 +377,7 @@ int main(int argc, char *argv[]) {
                                 char **p;
 
                                 if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) {
-                                        log_error("Out of memory");
+                                        log_oom();
                                         goto finish;
                                 }
 
@@ -383,7 +395,7 @@ int main(int argc, char *argv[]) {
                                         assert(strv_length(passwords) == 1);
 
                                         if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) {
-                                                log_error("Out of memory");
+                                                log_oom();
                                                 goto finish;
                                         }
 
@@ -416,7 +428,7 @@ int main(int argc, char *argv[]) {
 
                                         /* Pad password if necessary */
                                         if (!(c = new(char, opt_key_size))) {
-                                                log_error("Out of memory.");
+                                                log_oom();
                                                 goto finish;
                                         }
 
@@ -437,6 +449,11 @@ int main(int argc, char *argv[]) {
                                 zero(params);
                                 params.hash = hash;
 
+                                /* for CRYPT_PLAIN limit reads
+                                * from keyfile to key length, and
+                                * ignore keyfile-size */
+                                opt_keyfile_size = opt_key_size / 8;
+
                                 /* In contrast to what the name
                                  * crypt_setup() might suggest this
                                  * doesn't actually format anything,
@@ -448,14 +465,11 @@ int main(int argc, char *argv[]) {
                                                  cipher_mode,
                                                  NULL,
                                                  NULL,
-                                                 opt_key_size / 8,
+                                                 opt_keyfile_size,
                                                  &params);
 
-                                pass_volume_key = streq(hash, "plain");
-
-                               /* for CRYPT_PLAIN limit reads
-                                * from keyfile to key length */
-                                keyfile_size = opt_key_size / 8;
+                                /* hash == NULL implies the user passed "plain" */
+                                pass_volume_key = (hash == NULL);
                         }
 
                         if (k < 0) {
@@ -470,7 +484,7 @@ int main(int argc, char *argv[]) {
                                  argv[3]);
 
                         if (key_file)
-                                k = crypt_activate_by_keyfile_offset(cd, argv[2], CRYPT_ANY_SLOT, key_file, keyfile_size,
+                                k = crypt_activate_by_keyfile_offset(cd, argv[2], CRYPT_ANY_SLOT, key_file, opt_keyfile_size,
                                             opt_keyfile_offset, flags);
                         else {
                                 char **p;