4.15-stable review patch. If anyone has any objections, please let me know.
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From: Lars Persson lars.persson@axis.com
[ Upstream commit 6d6e71feb183aa588c849e20e7baa47cb162928a ]
The IV size should not include the 32 bit counter. Because we had the IV size set as 16 the transform only worked when the IV input was zero padded.
Fixes: a21eb94fc4d3 ("crypto: axis - add ARTPEC-6/7 crypto accelerator driver") Signed-off-by: Lars Persson larper@axis.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/crypto/axis/artpec6_crypto.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/crypto/axis/artpec6_crypto.c +++ b/drivers/crypto/axis/artpec6_crypto.c @@ -22,6 +22,7 @@ #include <linux/slab.h>
#include <crypto/aes.h> +#include <crypto/gcm.h> #include <crypto/internal/aead.h> #include <crypto/internal/hash.h> #include <crypto/internal/skcipher.h> @@ -1934,7 +1935,7 @@ static int artpec6_crypto_prepare_aead(s
memcpy(req_ctx->hw_ctx.J0, areq->iv, crypto_aead_ivsize(cipher)); // The HW omits the initial increment of the counter field. - crypto_inc(req_ctx->hw_ctx.J0+12, 4); + memcpy(req_ctx->hw_ctx.J0 + GCM_AES_IV_SIZE, "\x00\x00\x00\x01", 4);
ret = artpec6_crypto_setup_out_descr(common, &req_ctx->hw_ctx, sizeof(struct artpec6_crypto_aead_hw_ctx), false, false); @@ -2956,7 +2957,7 @@ static struct aead_alg aead_algos[] = { .setkey = artpec6_crypto_aead_set_key, .encrypt = artpec6_crypto_aead_encrypt, .decrypt = artpec6_crypto_aead_decrypt, - .ivsize = AES_BLOCK_SIZE, + .ivsize = GCM_AES_IV_SIZE, .maxauthsize = AES_BLOCK_SIZE,
.base = {