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sparc64: Fix AES ctr mode block size.

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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: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-12-19 15:20:23 -08:00
parent 9f28ffc03e
commit a8d97cef21
1 changed files with 24 additions and 3 deletions
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27
arch/sparc/crypto/aes_glue.c
View file

@ -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,