static int crypto_cbc_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct blkcipher_walk walk;
struct crypto_blkcipher *tfm = desc->tfm;
struct crypto_cbc_ctx *ctx = crypto_blkcipher_ctx(tfm);
struct crypto_cipher *child = ctx->child;
void (*xor)(u8 *, const u8 *, unsigned int bs) = ctx->xor;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
while ((nbytes = walk.nbytes)) {
if (walk.src.virt.addr == walk.dst.virt.addr)
nbytes = crypto_cbc_encrypt_inplace(desc, &walk, child,
xor);
else
nbytes = crypto_cbc_encrypt_segment(desc, &walk, child,
xor);
err = blkcipher_walk_done(desc, &walk, nbytes);
}
return err;
}
static int crypto_cbc_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct blkcipher_walk walk;
struct crypto_blkcipher *tfm = desc->tfm;
struct crypto_cbc_ctx *ctx = crypto_blkcipher_ctx(tfm);
struct crypto_cipher *child = ctx->child;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
while ((nbytes = walk.nbytes)) {
#ifdef CONFIG_CRYPTO_DEV_REALTEK_DBG
printk("%s: total=%d, walk=%d, blk=%d, src=%p, dst=%p\n", __FUNCTION__,
walk.total, walk.nbytes, crypto_cipher_blocksize(child),
walk.src.virt.addr, walk.dst.virt.addr
);
#endif
#ifdef CONFIG_CRYPTO_DEV_REALTEK
if (ctx->rtl_ctx.mode >= 0)
{
nbytes = rtl_cipher_crypt(child, 1,
&ctx->rtl_ctx, walk.src.virt.addr, nbytes,
walk.iv, walk.dst.virt.addr);
// cbc mode update
memcpy(walk.iv, walk.dst.virt.addr,
crypto_cipher_blocksize(child));
err = blkcipher_walk_done(desc, &walk, nbytes);
continue;
}
#endif
if (walk.src.virt.addr == walk.dst.virt.addr)
nbytes = crypto_cbc_encrypt_inplace(desc, &walk, child);
else
nbytes = crypto_cbc_encrypt_segment(desc, &walk, child);
err = blkcipher_walk_done(desc, &walk, nbytes);
}
return err;
}