1 files changed, 125 insertions, 0 deletions

diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index ee48ef8fb2ea..cd16d6e668ce 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -15,10 +15,40 @@
 
 #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 (*reinit)(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;
@@ -87,6 +117,11 @@ static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
         return crypto_ahash_crt(tfm)->reqsize;
 }
 
+static inline void *ahash_request_ctx(struct ahash_request *req)
+{
+        return req->__ctx;
+}
+
 static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
                                       const u8 *key, unsigned int keylen)
 {
@@ -101,6 +136,14 @@ static inline int crypto_ahash_digest(struct ahash_request *req)
         return crt->digest(req);
 }
 
+static inline void crypto_ahash_export(struct ahash_request *req, u8 *out)
+{
+        memcpy(out, ahash_request_ctx(req),
+               crypto_ahash_reqsize(crypto_ahash_reqtfm(req)));
+}
+
+int crypto_ahash_import(struct ahash_request *req, const u8 *in);
+
 static inline int crypto_ahash_init(struct ahash_request *req)
 {
         struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
@@ -169,4 +212,86 @@ 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 void crypto_shash_export(struct shash_desc *desc, u8 *out)
+{
+        memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm));
+}
+
+int crypto_shash_import(struct shash_desc *desc, const u8 *in);
+
+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 */