コード例 #1
0
ファイル: paes_s390.c プロジェクト: BWhitten/linux-stable
static int ctr_paes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
			  struct blkcipher_walk *walk)
{
	struct s390_paes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	u8 buf[AES_BLOCK_SIZE], *ctrptr;
	unsigned int nbytes, n, k;
	int ret, locked;

	locked = spin_trylock(&ctrblk_lock);

	ret = blkcipher_walk_virt_block(desc, walk, AES_BLOCK_SIZE);
	while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
		n = AES_BLOCK_SIZE;
		if (nbytes >= 2*AES_BLOCK_SIZE && locked)
			n = __ctrblk_init(ctrblk, walk->iv, nbytes);
		ctrptr = (n > AES_BLOCK_SIZE) ? ctrblk : walk->iv;
		k = cpacf_kmctr(ctx->fc | modifier, ctx->pk.protkey,
				walk->dst.virt.addr, walk->src.virt.addr,
				n, ctrptr);
		if (k) {
			if (ctrptr == ctrblk)
				memcpy(walk->iv, ctrptr + k - AES_BLOCK_SIZE,
				       AES_BLOCK_SIZE);
			crypto_inc(walk->iv, AES_BLOCK_SIZE);
			ret = blkcipher_walk_done(desc, walk, nbytes - n);
		}
		if (k < n) {
			if (__ctr_paes_set_key(ctx) != 0) {
				if (locked)
					spin_unlock(&ctrblk_lock);
				return blkcipher_walk_done(desc, walk, -EIO);
			}
		}
	}
	if (locked)
		spin_unlock(&ctrblk_lock);
	/*
	 * final block may be < AES_BLOCK_SIZE, copy only nbytes
	 */
	if (nbytes) {
		while (1) {
			if (cpacf_kmctr(ctx->fc | modifier,
					ctx->pk.protkey, buf,
					walk->src.virt.addr, AES_BLOCK_SIZE,
					walk->iv) == AES_BLOCK_SIZE)
				break;
			if (__ctr_paes_set_key(ctx) != 0)
				return blkcipher_walk_done(desc, walk, -EIO);
		}
		memcpy(walk->dst.virt.addr, buf, nbytes);
		crypto_inc(walk->iv, AES_BLOCK_SIZE);
		ret = blkcipher_walk_done(desc, walk, 0);
	}

	return ret;
}
コード例 #2
0
ファイル: des_s390.c プロジェクト: KutuSystems/kutu_linux
static int ctr_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
			    struct blkcipher_walk *walk)
{
	struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	u8 buf[DES_BLOCK_SIZE], *ctrptr;
	unsigned int n, nbytes;
	int ret, locked;

	locked = spin_trylock(&ctrblk_lock);

	ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE);
	while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
		n = DES_BLOCK_SIZE;
		if (nbytes >= 2*DES_BLOCK_SIZE && locked)
			n = __ctrblk_init(ctrblk, walk->iv, nbytes);
		ctrptr = (n > DES_BLOCK_SIZE) ? ctrblk : walk->iv;
		cpacf_kmctr(fc, ctx->key, walk->dst.virt.addr,
			    walk->src.virt.addr, n, ctrptr);
		if (ctrptr == ctrblk)
			memcpy(walk->iv, ctrptr + n - DES_BLOCK_SIZE,
				DES_BLOCK_SIZE);
		crypto_inc(walk->iv, DES_BLOCK_SIZE);
		ret = blkcipher_walk_done(desc, walk, nbytes - n);
	}
	if (locked)
		spin_unlock(&ctrblk_lock);
	/* final block may be < DES_BLOCK_SIZE, copy only nbytes */
	if (nbytes) {
		cpacf_kmctr(fc, ctx->key, buf, walk->src.virt.addr,
			    DES_BLOCK_SIZE, walk->iv);
		memcpy(walk->dst.virt.addr, buf, nbytes);
		crypto_inc(walk->iv, DES_BLOCK_SIZE);
		ret = blkcipher_walk_done(desc, walk, 0);
	}
	return ret;
}
コード例 #3
0
ファイル: des_s390.c プロジェクト: 1800alex/linux
static int ctr_desall_crypt(struct blkcipher_desc *desc, long func,
			    struct s390_des_ctx *ctx,
			    struct blkcipher_walk *walk)
{
	int ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE);
	unsigned int n, nbytes;
	u8 buf[DES_BLOCK_SIZE], ctrbuf[DES_BLOCK_SIZE];
	u8 *out, *in, *ctrptr = ctrbuf;

	if (!walk->nbytes)
		return ret;

	if (spin_trylock(&ctrblk_lock))
		ctrptr = ctrblk;

	memcpy(ctrptr, walk->iv, DES_BLOCK_SIZE);
	while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
		out = walk->dst.virt.addr;
		in = walk->src.virt.addr;
		while (nbytes >= DES_BLOCK_SIZE) {
			if (ctrptr == ctrblk)
				n = __ctrblk_init(ctrptr, nbytes);
			else
				n = DES_BLOCK_SIZE;
			ret = crypt_s390_kmctr(func, ctx->key, out, in,
					       n, ctrptr);
			if (ret < 0 || ret != n) {
				if (ctrptr == ctrblk)
					spin_unlock(&ctrblk_lock);
				return -EIO;
			}
			if (n > DES_BLOCK_SIZE)
				memcpy(ctrptr, ctrptr + n - DES_BLOCK_SIZE,
				       DES_BLOCK_SIZE);
			crypto_inc(ctrptr, DES_BLOCK_SIZE);
			out += n;
			in += n;
			nbytes -= n;
		}
		ret = blkcipher_walk_done(desc, walk, nbytes);
	}
	if (ctrptr == ctrblk) {
		if (nbytes)
			memcpy(ctrbuf, ctrptr, DES_BLOCK_SIZE);
		else
			memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE);
		spin_unlock(&ctrblk_lock);
	} else {
		if (!nbytes)
			memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE);
	}
	/* final block may be < DES_BLOCK_SIZE, copy only nbytes */
	if (nbytes) {
		out = walk->dst.virt.addr;
		in = walk->src.virt.addr;
		ret = crypt_s390_kmctr(func, ctx->key, buf, in,
				       DES_BLOCK_SIZE, ctrbuf);
		if (ret < 0 || ret != DES_BLOCK_SIZE)
			return -EIO;
		memcpy(out, buf, nbytes);
		crypto_inc(ctrbuf, DES_BLOCK_SIZE);
		ret = blkcipher_walk_done(desc, walk, 0);
		memcpy(walk->iv, ctrbuf, DES_BLOCK_SIZE);
	}
	return ret;
}