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cryptsetup: hash=plain means don't use a hash

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"plain" is a semantic value that cryptsetup(8) uses to describe a plain
dm-crypt volume that does not use a hash. Catch this value earlier and
ensure that a NULL params.hash is passed to crypt_format to avoid
passing an invalid hash type to the libcryptsetup backend.

FDO bug #56593.
This commit is contained in:
Dave Reisner 2012-11-06 09:49:27 -05:00
parent aea54018a5
commit 65343c7494
1 changed files with 7 additions and 2 deletions
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9
src/cryptsetup/cryptsetup.c
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@ -342,7 +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;
@ -463,7 +468,7 @@ int main(int argc, char *argv[]) {
opt_keyfile_size,
&params);
pass_volume_key = streq(hash, "plain");
pass_volume_key = !!hash;
}
if (k < 0) {