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authorEric Biggers <ebiggers@google.com>2019-01-03 20:16:14 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2019-01-11 14:16:57 +0800
commit0872da16dd632e5d1d3f80388f7ae6fbeb17ad53 (patch)
treecf221e111a2cfe505066d0f793ddd38fedd11379 /include/crypto/internal
parent251b7aea34ba3c4d4fdfa9447695642eb8b8b098 (diff)
downloadlinux-stericsson-0872da16dd632e5d1d3f80388f7ae6fbeb17ad53.tar.gz
crypto: skcipher - add helper for simple block cipher modes
The majority of skcipher templates (including both the existing ones and the ones remaining to be converted from the "blkcipher" API) just wrap a single block cipher algorithm. This includes cbc, cfb, ctr, ecb, kw, ofb, and pcbc. Add a helper function skcipher_alloc_instance_simple() that handles allocating an skcipher instance for this common case. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto/internal')
-rw-r--r--include/crypto/internal/skcipher.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/crypto/internal/skcipher.h b/include/crypto/internal/skcipher.h
index 453e867b4bd9..9de6032209cb 100644
--- a/include/crypto/internal/skcipher.h
+++ b/include/crypto/internal/skcipher.h
@@ -205,5 +205,20 @@ static inline unsigned int crypto_skcipher_alg_max_keysize(
return alg->max_keysize;
}
+/* Helpers for simple block cipher modes of operation */
+struct skcipher_ctx_simple {
+ struct crypto_cipher *cipher; /* underlying block cipher */
+};
+static inline struct crypto_cipher *
+skcipher_cipher_simple(struct crypto_skcipher *tfm)
+{
+ struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);
+
+ return ctx->cipher;
+}
+struct skcipher_instance *
+skcipher_alloc_instance_simple(struct crypto_template *tmpl, struct rtattr **tb,
+ struct crypto_alg **cipher_alg_ret);
+
#endif /* _CRYPTO_INTERNAL_SKCIPHER_H */