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authorHerbert Xu <herbert@gondor.apana.org.au>2008-11-02 21:38:11 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-12-25 11:01:30 +1100
commitdec8b78606ebd5f309c38f2fb10196ce996dd18d (patch)
tree005ef526f1b0e953a3a57e6c991e0921fcd5234b /include/linux
parent3b2f6df08258e2875f42bd630eece7e7241a053b (diff)
crypto: hash - Add import/export interface
It is often useful to save the partial state of a hash function so that it can be used as a base for two or more computations. The most prominent example is HMAC where all hashes start from a base determined by the key. Having an import/export interface means that we only have to compute that base once rather than for each message. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/crypto.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 44c72f0f9b0..77a1f3d9416 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -221,6 +221,7 @@ struct ablkcipher_alg {
struct ahash_alg {
int (*init)(struct ahash_request *req);
+ int (*reinit)(struct ahash_request *req);
int (*update)(struct ahash_request *req);
int (*final)(struct ahash_request *req);
int (*digest)(struct ahash_request *req);