crypto: nx - fix SHA-2 for chunks bigger than block size

Each call to the co-processor, with exception of the last call, needs to send data that is multiple of block size. As consequence, any remaining data is kept in the internal NX context. This patch fixes a bug in the driver that causes it to save incorrect data into the context when data is bigger than the block size. Reviewed-by: Joy Latten <jmlatten@linux.vnet.ibm.com> Signed-off-by: Marcelo Cerri <mhcerri@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
git-mirror · Sep 2, 2013 · 069fa04 · 069fa04
1 parent dec0ed6
commit 069fa04
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/drivers/crypto/nx/nx-sha256.c b/drivers/crypto/nx/nx-sha256.c
@@ -129,7 +129,7 @@ static int nx_sha256_update(struct shash_desc *desc, const u8 *data,
 		NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
 
 		total -= to_process;
-		data += to_process;
+		data += to_process - sctx->count;
 		sctx->count = 0;
 		in_sg = nx_ctx->in_sg;
 	} while (leftover >= SHA256_BLOCK_SIZE);

diff --git a/drivers/crypto/nx/nx-sha512.c b/drivers/crypto/nx/nx-sha512.c
@@ -131,7 +131,7 @@ static int nx_sha512_update(struct shash_desc *desc, const u8 *data,
 		NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
 
 		total -= to_process;
-		data += to_process;
+		data += to_process - sctx->count[0];
 		sctx->count[0] = 0;
 		in_sg = nx_ctx->in_sg;
 	} while (leftover >= SHA512_BLOCK_SIZE);