[CRYPTO] hash: Add asynchronous hash support

This patch adds asynchronous hash and digest support.

Signed-off-by: Loc Ho <lho@amcc.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 183 insertions, 4 deletions

diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 425824bd49f3..b6efe569128d 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -30,15 +30,17 @@
  */
 #define CRYPTO_ALG_TYPE_MASK            0x0000000f
 #define CRYPTO_ALG_TYPE_CIPHER          0x00000001
-#define CRYPTO_ALG_TYPE_DIGEST          0x00000002
-#define CRYPTO_ALG_TYPE_HASH            0x00000003
+#define CRYPTO_ALG_TYPE_COMPRESS        0x00000002
+#define CRYPTO_ALG_TYPE_AEAD            0x00000003
 #define CRYPTO_ALG_TYPE_BLKCIPHER       0x00000004
 #define CRYPTO_ALG_TYPE_ABLKCIPHER      0x00000005
 #define CRYPTO_ALG_TYPE_GIVCIPHER       0x00000006
-#define CRYPTO_ALG_TYPE_COMPRESS        0x00000008
-#define CRYPTO_ALG_TYPE_AEAD            0x00000009
+#define CRYPTO_ALG_TYPE_DIGEST          0x00000008
+#define CRYPTO_ALG_TYPE_HASH            0x00000009
+#define CRYPTO_ALG_TYPE_AHASH           0x0000000a
 
 #define CRYPTO_ALG_TYPE_HASH_MASK       0x0000000e
+#define CRYPTO_ALG_TYPE_AHASH_MASK      0x0000000c
 #define CRYPTO_ALG_TYPE_BLKCIPHER_MASK  0x0000000c
 
 #define CRYPTO_ALG_LARVAL               0x00000010
@@ -102,6 +104,7 @@ struct crypto_async_request;
 struct crypto_aead;
 struct crypto_blkcipher;
 struct crypto_hash;
+struct crypto_ahash;
 struct crypto_tfm;
 struct crypto_type;
 struct aead_givcrypt_request;
@@ -131,6 +134,18 @@ struct ablkcipher_request {
         void *__ctx[] CRYPTO_MINALIGN_ATTR;
 };
 
+struct ahash_request {
+        struct crypto_async_request base;
+
+        void *info;
+
+        unsigned int nbytes;
+        struct scatterlist *src;
+        u8                 *result;
+
+        void *__ctx[] CRYPTO_MINALIGN_ATTR;
+};
+
 /**
  *      struct aead_request - AEAD request
  *      @base: Common attributes for async crypto requests
@@ -195,6 +210,17 @@ struct ablkcipher_alg {
         unsigned int ivsize;
 };
 
+struct ahash_alg {
+        int (*init)(struct ahash_request *req);
+        int (*update)(struct ahash_request *req);
+        int (*final)(struct ahash_request *req);
+        int (*digest)(struct ahash_request *req);
+        int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
+                        unsigned int keylen);
+
+        unsigned int digestsize;
+};
+
 struct aead_alg {
         int (*setkey)(struct crypto_aead *tfm, const u8 *key,
                       unsigned int keylen);
@@ -272,6 +298,7 @@ struct compress_alg {
 #define cra_cipher      cra_u.cipher
 #define cra_digest      cra_u.digest
 #define cra_hash        cra_u.hash
+#define cra_ahash       cra_u.ahash
 #define cra_compress    cra_u.compress
 
 struct crypto_alg {
@@ -298,6 +325,7 @@ struct crypto_alg {
                 struct cipher_alg cipher;
                 struct digest_alg digest;
                 struct hash_alg hash;
+                struct ahash_alg ahash;
                 struct compress_alg compress;
         } cra_u;
 
@@ -383,6 +411,19 @@ struct hash_tfm {
         unsigned int digestsize;
 };
 
+struct ahash_tfm {
+        int (*init)(struct ahash_request *req);
+        int (*update)(struct ahash_request *req);
+        int (*final)(struct ahash_request *req);
+        int (*digest)(struct ahash_request *req);
+        int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
+                        unsigned int keylen);
+
+        unsigned int digestsize;
+        struct crypto_ahash *base;
+        unsigned int reqsize;
+};
+
 struct compress_tfm {
         int (*cot_compress)(struct crypto_tfm *tfm,
                             const u8 *src, unsigned int slen,
@@ -397,6 +438,7 @@ struct compress_tfm {
 #define crt_blkcipher   crt_u.blkcipher
 #define crt_cipher      crt_u.cipher
 #define crt_hash        crt_u.hash
+#define crt_ahash       crt_u.ahash
 #define crt_compress    crt_u.compress
 
 struct crypto_tfm {
@@ -409,6 +451,7 @@ struct crypto_tfm {
                 struct blkcipher_tfm blkcipher;
                 struct cipher_tfm cipher;
                 struct hash_tfm hash;
+                struct ahash_tfm ahash;
                 struct compress_tfm compress;
         } crt_u;
         
@@ -441,6 +484,10 @@ struct crypto_hash {
         struct crypto_tfm base;
 };
 
+struct crypto_ahash {
+        struct crypto_tfm base;
+};
+
 enum {
         CRYPTOA_UNSPEC,
         CRYPTOA_ALG,
@@ -1264,5 +1311,137 @@ static inline int crypto_comp_decompress(struct crypto_comp *tfm,
                                                     src, slen, dst, dlen);
 }
 
+static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
+{
+        return (struct crypto_ahash *)tfm;
+}
+
+static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name,
+                                                      u32 type, u32 mask)
+{
+        type &= ~CRYPTO_ALG_TYPE_MASK;
+        mask &= ~CRYPTO_ALG_TYPE_MASK;
+        type |= CRYPTO_ALG_TYPE_AHASH;
+        mask |= CRYPTO_ALG_TYPE_AHASH_MASK;
+
+        return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask));
+}
+
+static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
+{
+        return &tfm->base;
+}
+
+static inline void crypto_free_ahash(struct crypto_ahash *tfm)
+{
+        crypto_free_tfm(crypto_ahash_tfm(tfm));
+}
+
+static inline unsigned int crypto_ahash_alignmask(
+        struct crypto_ahash *tfm)
+{
+        return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
+}
+
+static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm)
+{
+        return &crypto_ahash_tfm(tfm)->crt_ahash;
+}
+
+static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
+{
+        return crypto_ahash_crt(tfm)->digestsize;
+}
+
+static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
+{
+        return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
+}
+
+static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
+{
+        crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
+}
+
+static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
+{
+        crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
+}
+
+static inline struct crypto_ahash *crypto_ahash_reqtfm(
+        struct ahash_request *req)
+{
+        return __crypto_ahash_cast(req->base.tfm);
+}
+
+static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
+{
+        return crypto_ahash_crt(tfm)->reqsize;
+}
+
+static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
+                                      const u8 *key, unsigned int keylen)
+{
+        struct ahash_tfm *crt = crypto_ahash_crt(tfm);
+
+        return crt->setkey(crt->base, key, keylen);
+}
+
+static inline int crypto_ahash_digest(struct ahash_request *req)
+{
+        struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
+        return crt->digest(req);
+}
+
+static inline void ahash_request_set_tfm(struct ahash_request *req,
+                                         struct crypto_ahash *tfm)
+{
+        req->base.tfm = crypto_ahash_tfm(crypto_ahash_crt(tfm)->base);
+}
+
+static inline struct ahash_request *ahash_request_alloc(
+        struct crypto_ahash *tfm, gfp_t gfp)
+{
+        struct ahash_request *req;
+
+        req = kmalloc(sizeof(struct ahash_request) +
+                      crypto_ahash_reqsize(tfm), gfp);
+
+        if (likely(req))
+                ahash_request_set_tfm(req, tfm);
+
+        return req;
+}
+
+static inline void ahash_request_free(struct ahash_request *req)
+{
+        kfree(req);
+}
+
+static inline struct ahash_request *ahash_request_cast(
+        struct crypto_async_request *req)
+{
+        return container_of(req, struct ahash_request, base);
+}
+
+static inline void ahash_request_set_callback(struct ahash_request *req,
+                                              u32 flags,
+                                              crypto_completion_t complete,
+                                              void *data)
+{
+        req->base.complete = complete;
+        req->base.data = data;
+        req->base.flags = flags;
+}
+
+static inline void ahash_request_set_crypt(struct ahash_request *req,
+                                           struct scatterlist *src, u8 *result,
+                                           unsigned int nbytes)
+{
+        req->src = src;
+        req->nbytes = nbytes;
+        req->result = result;
+}
+
 #endif  /* _LINUX_CRYPTO_H */