[v1,01/15] crypto: talitos - fix skcipher failure due to wrong output IV

Commit Message

Christophe Leroy May 21, 2019, 1:34 p.m. UTC

Selftests report the following:

[    2.984845] alg: skcipher: cbc-aes-talitos encryption test failed (wrong output IV) on test vector 0, cfg="in-place"
[    2.995377] 00000000: 3d af ba 42 9d 9e b4 30 b4 22 da 80 2c 9f ac 41
[    3.032673] alg: skcipher: cbc-des-talitos encryption test failed (wrong output IV) on test vector 0, cfg="in-place"
[    3.043185] 00000000: fe dc ba 98 76 54 32 10
[    3.063238] alg: skcipher: cbc-3des-talitos encryption test failed (wrong output IV) on test vector 0, cfg="in-place"
[    3.073818] 00000000: 7d 33 88 93 0f 93 b2 42

This above dumps show that the actual output IV is indeed the input IV.
This is due to the IV not being copied back into the request.

This patch fixes that.

Signed-off-by: Christophe Leroy <[e-mail]>
Fixes: 4de9d0b547b9 ("crypto: talitos - Add ablkcipher algorithms")
Cc: [e-mail]
Reviewed-by: Horia Geanta <[e-mail]>
---
 drivers/crypto/talitos.c | 4 ++++
 1 file changed, 4 insertions(+)

Patch

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 1d429fc073d1..f443cbe7da80 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -1637,11 +1637,15 @@  static void ablkcipher_done(struct device *dev,
 			    int err)
 {
 	struct ablkcipher_request *areq = context;
+	struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
+	struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
+	unsigned int ivsize = crypto_ablkcipher_ivsize(cipher);
 	struct talitos_edesc *edesc;
 
 	edesc = container_of(desc, struct talitos_edesc, desc);
 
 	common_nonsnoop_unmap(dev, edesc, areq);
+	memcpy(areq->info, ctx->iv, ivsize);
 
 	kfree(edesc);