crypto: skcipher - Add default key size helper
While converting ecryptfs over to skcipher I found that it needs
to pick a default key size if one isn't given. Rather than having
it poke into the guts of the algorithm to get max_keysize, let's
provide a helper that is meant to give a sane default (just in
case we ever get an algorithm that has no maximum key size).
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h
index fd8742a..2f07b4f 100644
--- a/include/crypto/skcipher.h
+++ b/include/crypto/skcipher.h
@@ -60,8 +60,7 @@
unsigned int ivsize;
unsigned int reqsize;
-
- bool has_setkey;
+ unsigned int keysize;
struct crypto_tfm base;
};
@@ -309,7 +308,13 @@
static inline bool crypto_skcipher_has_setkey(struct crypto_skcipher *tfm)
{
- return tfm->has_setkey;
+ return tfm->keysize;
+}
+
+static inline unsigned int crypto_skcipher_default_keysize(
+ struct crypto_skcipher *tfm)
+{
+ return tfm->keysize;
}
/**
