3 files changed, 113 insertions, 0 deletions

diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index ee48ef8fb2e..f9b51d40895 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -15,10 +15,39 @@
 
 #include <linux/crypto.h>
 
+struct shash_desc {
+	struct crypto_shash *tfm;
+	u32 flags;
+
+	void *__ctx[] CRYPTO_MINALIGN_ATTR;
+};
+
+struct shash_alg {
+	int (*init)(struct shash_desc *desc);
+	int (*update)(struct shash_desc *desc, const u8 *data,
+		      unsigned int len);
+	int (*final)(struct shash_desc *desc, u8 *out);
+	int (*finup)(struct shash_desc *desc, const u8 *data,
+		     unsigned int len, u8 *out);
+	int (*digest)(struct shash_desc *desc, const u8 *data,
+		      unsigned int len, u8 *out);
+	int (*setkey)(struct crypto_shash *tfm, const u8 *key,
+		      unsigned int keylen);
+
+	unsigned int descsize;
+	unsigned int digestsize;
+
+	struct crypto_alg base;
+};
+
 struct crypto_ahash {
 	struct crypto_tfm base;
 };
 
+struct crypto_shash {
+	struct crypto_tfm base;
+};
+
 static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
 {
 	return (struct crypto_ahash *)tfm;
@@ -169,4 +198,79 @@ static inline void ahash_request_set_crypt(struct ahash_request *req,
 	req->result = result;
 }
 
+struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
+					u32 mask);
+
+static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
+{
+	return &tfm->base;
+}
+
+static inline void crypto_free_shash(struct crypto_shash *tfm)
+{
+	crypto_free_tfm(crypto_shash_tfm(tfm));
+}
+
+static inline unsigned int crypto_shash_alignmask(
+	struct crypto_shash *tfm)
+{
+	return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
+}
+
+static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
+{
+	return container_of(alg, struct shash_alg, base);
+}
+
+static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
+{
+	return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
+}
+
+static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
+{
+	return crypto_shash_alg(tfm)->digestsize;
+}
+
+static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
+{
+	return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
+}
+
+static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
+{
+	crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
+}
+
+static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
+{
+	crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
+}
+
+static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
+{
+	return crypto_shash_alg(tfm)->descsize;
+}
+
+static inline void *shash_desc_ctx(struct shash_desc *desc)
+{
+	return desc->__ctx;
+}
+
+int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
+			unsigned int keylen);
+int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
+			unsigned int len, u8 *out);
+
+static inline int crypto_shash_init(struct shash_desc *desc)
+{
+	return crypto_shash_alg(desc->tfm)->init(desc);
+}
+
+int crypto_shash_update(struct shash_desc *desc, const u8 *data,
+			unsigned int len);
+int crypto_shash_final(struct shash_desc *desc, u8 *out);
+int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
+		       unsigned int len, u8 *out);
+
 #endif	/* _CRYPTO_HASH_H */
diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h
index 917ae57bad4..32d3a8ed06d 100644
--- a/include/crypto/internal/hash.h
+++ b/include/crypto/internal/hash.h
@@ -40,6 +40,9 @@ int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
 int crypto_hash_walk_first(struct ahash_request *req,
 			   struct crypto_hash_walk *walk);
 
+int crypto_register_shash(struct shash_alg *alg);
+int crypto_unregister_shash(struct shash_alg *alg);
+
 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 {
 	return crypto_tfm_ctx(&tfm->base);
@@ -74,5 +77,10 @@ static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 	return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 }
 
+static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
+{
+	return crypto_tfm_ctx(&tfm->base);
+}
+
 #endif	/* _CRYPTO_INTERNAL_HASH_H */
 
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index ffaaa418cf5..ee95c748695 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -39,6 +39,7 @@
 #define CRYPTO_ALG_TYPE_HASH		0x00000009
 #define CRYPTO_ALG_TYPE_AHASH		0x0000000a
 #define CRYPTO_ALG_TYPE_RNG		0x0000000c
+#define CRYPTO_ALG_TYPE_SHASH		0x0000000d
 
 #define CRYPTO_ALG_TYPE_HASH_MASK	0x0000000e
 #define CRYPTO_ALG_TYPE_AHASH_MASK	0x0000000c