crypto: gcm - make GMAC work when dst and src are different

The GMAC code assumes that dst==src, which causes problems when trying to add
rfc4543(gcm(aes)) test vectors.

So fix this code to work when source and destination buffer are different.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index a654b13ae004..6cc27f111551 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -198,6 +198,7 @@ config CRYPTO_GCM
         select CRYPTO_CTR
         select CRYPTO_AEAD
         select CRYPTO_GHASH
+        select CRYPTO_NULL
         help
           Support for Galois/Counter Mode (GCM) and Galois Message
           Authentication Code (GMAC). Required for IPSec.