crypto: hash - Add import/export interface

[mirror_ubuntu-bionic-kernel.git] / include / crypto / hash.h

diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index f9b51d408953240814c6acef3cb9a8077adfd2c0..cd16d6e668ce78a523a7865f747d5078ad0ecd76 100644 (file)
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -24,6 +24,7 @@ struct shash_desc {
 
 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);
@@ -116,6 +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)
 {
@@ -130,6 +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));
@@ -262,6 +276,13 @@ int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
 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);