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-rw-r--r--include/crypto/hash.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index 0d1b403888c9..a2563a59fadd 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -123,6 +123,17 @@ struct ahash_request {
* data so the transformation can continue from this point onward. No
* data processing happens at this point. Driver must not use
* req->result.
+ * @init_tfm: Initialize the cryptographic transformation object.
+ * This function is called only once at the instantiation
+ * time, right after the transformation context was
+ * allocated. In case the cryptographic hardware has
+ * some special requirements which need to be handled
+ * by software, this function shall check for the precise
+ * requirement of the transformation and put any software
+ * fallbacks in place.
+ * @exit_tfm: Deinitialize the cryptographic transformation object.
+ * This is a counterpart to @init_tfm, used to remove
+ * various changes set in @init_tfm.
* @halg: see struct hash_alg_common
*/
struct ahash_alg {
@@ -135,6 +146,8 @@ struct ahash_alg {
int (*import)(struct ahash_request *req, const void *in);
int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
unsigned int keylen);
+ int (*init_tfm)(struct crypto_ahash *tfm);
+ void (*exit_tfm)(struct crypto_ahash *tfm);
struct hash_alg_common halg;
};