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Commit a8d97cef authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Fix AES ctr mode block size. 



Like the generic versions, we need to support a block size
of '1' for CTR mode AES.

This was discovered thanks to all of the new test cases added by
Jussi Kivilinna.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9f28ffc0

arch/sparc/crypto/aes_glue.c

+24 −3
Original line number Diff line number Diff line
@@ -329,6 +329,22 @@ static int cbc_decrypt(struct blkcipher_desc *desc, 
	return err;

}



static void ctr_crypt_final(struct crypto_sparc64_aes_ctx *ctx,

			    struct blkcipher_walk *walk)

{

	u8 *ctrblk = walk->iv;

	u64 keystream[AES_BLOCK_SIZE / sizeof(u64)];

	u8 *src = walk->src.virt.addr;

	u8 *dst = walk->dst.virt.addr;

	unsigned int nbytes = walk->nbytes;



	ctx->ops->ecb_encrypt(&ctx->key[0], (const u64 *)ctrblk,

			      keystream, AES_BLOCK_SIZE);

	crypto_xor((u8 *) keystream, src, nbytes);

	memcpy(dst, keystream, nbytes);

	crypto_inc(ctrblk, AES_BLOCK_SIZE);

}



static int ctr_crypt(struct blkcipher_desc *desc,

		     struct scatterlist *dst, struct scatterlist *src,

		     unsigned int nbytes)
@@ -338,10 +354,11 @@ static int ctr_crypt(struct blkcipher_desc *desc, 
	int err;



	blkcipher_walk_init(&walk, dst, src, nbytes);

	err = blkcipher_walk_virt(desc, &walk);

	err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);

	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;



	ctx->ops->load_encrypt_keys(&ctx->key[0]);

	while ((nbytes = walk.nbytes)) {

	while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {

		unsigned int block_len = nbytes & AES_BLOCK_MASK;



		if (likely(block_len)) {
@@ -353,6 +370,10 @@ static int ctr_crypt(struct blkcipher_desc *desc, 
		nbytes &= AES_BLOCK_SIZE - 1;

		err = blkcipher_walk_done(desc, &walk, nbytes);

	}

	if (walk.nbytes) {

		ctr_crypt_final(ctx, &walk);

		err = blkcipher_walk_done(desc, &walk, 0);

	}

	fprs_write(0);

	return err;

}
@@ -418,7 +439,7 @@ static struct crypto_alg algs[] = { { 
	.cra_driver_name	= "ctr-aes-sparc64",

	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,

	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,

	.cra_blocksize		= AES_BLOCK_SIZE,

	.cra_blocksize		= 1,

	.cra_ctxsize		= sizeof(struct crypto_sparc64_aes_ctx),

	.cra_alignmask		= 7,

	.cra_type		= &crypto_blkcipher_type,