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[v2,08/17] crypto: skcipher - add the ability to abort a skcipher walk

Message ID 20190903164339.27984-9-ard.biesheuvel@linaro.org
State Accepted
Commit 6017826b494008895632e092cc49c0bdb3019eab
Headers show
Series crypto: arm/aes - XTS ciphertext stealing and other updates | expand

Commit Message

Ard Biesheuvel Sept. 3, 2019, 4:43 p.m. UTC 
After starting a skcipher walk, the only way to ensure that all
resources it has tied up are released is to complete it. In some
cases, it will be useful to be able to abort a walk cleanly after
it has started, so add this ability to the skcipher walk API.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

---
 include/crypto/internal/skcipher.h | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.17.1
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Patch

diff --git a/include/crypto/internal/skcipher.h b/include/crypto/internal/skcipher.h
index d68faa5759ad..734b6f7081b8 100644
--- a/include/crypto/internal/skcipher.h
+++ b/include/crypto/internal/skcipher.h
@@ -148,6 +148,11 @@  int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
 			       struct aead_request *req, bool atomic);
 void skcipher_walk_complete(struct skcipher_walk *walk, int err);
 
+static inline void skcipher_walk_abort(struct skcipher_walk *walk)
+{
+	skcipher_walk_done(walk, -ECANCELED);
+}
+
 static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
 					       int err)
 {