*
* s390 implementation of the DES Cipher Algorithm.
*
- * Copyright (c) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Thomas Spatzier (tspat@de.ibm.com)
- *
+ * Copyright IBM Corp. 2003, 2011
+ * Author(s): Thomas Spatzier
+ * Jan Glauber (jan.glauber@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
*/
-#include <crypto/algapi.h>
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/crypto.h>
+#include <crypto/algapi.h>
+#include <crypto/des.h>
#include "crypt_s390.h"
-#include "crypto_des.h"
-
-#define DES_BLOCK_SIZE 8
-#define DES_KEY_SIZE 8
-
-#define DES3_128_KEY_SIZE (2 * DES_KEY_SIZE)
-#define DES3_128_BLOCK_SIZE DES_BLOCK_SIZE
-
-#define DES3_192_KEY_SIZE (3 * DES_KEY_SIZE)
-#define DES3_192_BLOCK_SIZE DES_BLOCK_SIZE
-struct crypt_s390_des_ctx {
- u8 iv[DES_BLOCK_SIZE];
- u8 key[DES_KEY_SIZE];
-};
+#define DES3_KEY_SIZE (3 * DES_KEY_SIZE)
-struct crypt_s390_des3_128_ctx {
- u8 iv[DES_BLOCK_SIZE];
- u8 key[DES3_128_KEY_SIZE];
-};
+static u8 *ctrblk;
-struct crypt_s390_des3_192_ctx {
+struct s390_des_ctx {
u8 iv[DES_BLOCK_SIZE];
- u8 key[DES3_192_KEY_SIZE];
+ u8 key[DES3_KEY_SIZE];
};
static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen)
+ unsigned int key_len)
{
- struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
+ struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
u32 *flags = &tfm->crt_flags;
- int ret;
+ u32 tmp[DES_EXPKEY_WORDS];
- /* test if key is valid (not a weak key) */
- ret = crypto_des_check_key(key, keylen, flags);
- if (ret == 0)
- memcpy(dctx->key, key, keylen);
- return ret;
+ /* check for weak keys */
+ if (!des_ekey(tmp, key) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ *flags |= CRYPTO_TFM_RES_WEAK_KEY;
+ return -EINVAL;
+ }
+
+ memcpy(ctx->key, key, key_len);
+ return 0;
}
static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
- struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
+ struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
- crypt_s390_km(KM_DEA_ENCRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
+ crypt_s390_km(KM_DEA_ENCRYPT, ctx->key, out, in, DES_BLOCK_SIZE);
}
static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
- struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
+ struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
- crypt_s390_km(KM_DEA_DECRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
-}
-
-static unsigned int des_encrypt_ecb(const struct cipher_desc *desc, u8 *out,
- const u8 *in, unsigned int nbytes)
-{
- struct crypt_s390_des_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES_BLOCK_SIZE - 1);
- ret = crypt_s390_km(KM_DEA_ENCRYPT, sctx->key, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
-}
-
-static unsigned int des_decrypt_ecb(const struct cipher_desc *desc, u8 *out,
- const u8 *in, unsigned int nbytes)
-{
- struct crypt_s390_des_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES_BLOCK_SIZE - 1);
- ret = crypt_s390_km(KM_DEA_DECRYPT, sctx->key, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
-}
-
-static unsigned int des_encrypt_cbc(const struct cipher_desc *desc, u8 *out,
- const u8 *in, unsigned int nbytes)
-{
- struct crypt_s390_des_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES_BLOCK_SIZE - 1);
-
- memcpy(sctx->iv, desc->info, DES_BLOCK_SIZE);
- ret = crypt_s390_kmc(KMC_DEA_ENCRYPT, &sctx->iv, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- memcpy(desc->info, sctx->iv, DES_BLOCK_SIZE);
- return nbytes;
-}
-
-static unsigned int des_decrypt_cbc(const struct cipher_desc *desc, u8 *out,
- const u8 *in, unsigned int nbytes)
-{
- struct crypt_s390_des_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES_BLOCK_SIZE - 1);
-
- memcpy(&sctx->iv, desc->info, DES_BLOCK_SIZE);
- ret = crypt_s390_kmc(KMC_DEA_DECRYPT, &sctx->iv, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
+ crypt_s390_km(KM_DEA_DECRYPT, ctx->key, out, in, DES_BLOCK_SIZE);
}
static struct crypto_alg des_alg = {
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
+ .cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(des_alg.cra_list),
.cra_u = {
.cia_setkey = des_setkey,
.cia_encrypt = des_encrypt,
.cia_decrypt = des_decrypt,
- .cia_encrypt_ecb = des_encrypt_ecb,
- .cia_decrypt_ecb = des_decrypt_ecb,
- .cia_encrypt_cbc = des_encrypt_cbc,
- .cia_decrypt_cbc = des_decrypt_cbc,
}
}
};
static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
- void *param, struct blkcipher_walk *walk)
+ u8 *key, struct blkcipher_walk *walk)
{
int ret = blkcipher_walk_virt(desc, walk);
unsigned int nbytes;
u8 *out = walk->dst.virt.addr;
u8 *in = walk->src.virt.addr;
- ret = crypt_s390_km(func, param, out, in, n);
+ ret = crypt_s390_km(func, key, out, in, n);
BUG_ON((ret < 0) || (ret != n));
nbytes &= DES_BLOCK_SIZE - 1;
}
static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
- void *param, struct blkcipher_walk *walk)
+ u8 *iv, struct blkcipher_walk *walk)
{
int ret = blkcipher_walk_virt(desc, walk);
unsigned int nbytes = walk->nbytes;
if (!nbytes)
goto out;
- memcpy(param, walk->iv, DES_BLOCK_SIZE);
+ memcpy(iv, walk->iv, DES_BLOCK_SIZE);
do {
/* only use complete blocks */
unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
u8 *out = walk->dst.virt.addr;
u8 *in = walk->src.virt.addr;
- ret = crypt_s390_kmc(func, param, out, in, n);
+ ret = crypt_s390_kmc(func, iv, out, in, n);
BUG_ON((ret < 0) || (ret != n));
nbytes &= DES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
} while ((nbytes = walk->nbytes));
- memcpy(walk->iv, param, DES_BLOCK_SIZE);
+ memcpy(walk->iv, iv, DES_BLOCK_SIZE);
out:
return ret;
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
- struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, sctx->key, &walk);
+ return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, ctx->key, &walk);
}
static int ecb_des_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
- struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return ecb_desall_crypt(desc, KM_DEA_DECRYPT, sctx->key, &walk);
+ return ecb_desall_crypt(desc, KM_DEA_DECRYPT, ctx->key, &walk);
}
static struct crypto_alg ecb_des_alg = {
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
+ .cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(ecb_des_alg.cra_list),
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
- struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, sctx->iv, &walk);
+ return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, ctx->iv, &walk);
}
static int cbc_des_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
- struct crypt_s390_des_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, sctx->iv, &walk);
+ return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, ctx->iv, &walk);
}
static struct crypto_alg cbc_des_alg = {
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des_ctx),
+ .cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(cbc_des_alg.cra_list),
* complementation keys. Any weakness is obviated by the use of
* multiple keys.
*
- * However, if the two independent 64-bit keys are equal,
- * then the DES3 operation is simply the same as DES.
- * Implementers MUST reject keys that exhibit this property.
+ * However, if the first two or last two independent 64-bit keys are
+ * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
+ * same as DES. Implementers MUST reject keys that exhibit this
+ * property.
*
*/
-static int des3_128_setkey(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen)
+static int des3_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int key_len)
{
- int i, ret;
- struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
- const u8 *temp_key = key;
+ struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
u32 *flags = &tfm->crt_flags;
- if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE))) {
- *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
+ if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
+ memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
+ DES_KEY_SIZE)) &&
+ (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ *flags |= CRYPTO_TFM_RES_WEAK_KEY;
return -EINVAL;
}
- for (i = 0; i < 2; i++, temp_key += DES_KEY_SIZE) {
- ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
- if (ret < 0)
- return ret;
- }
- memcpy(dctx->key, key, keylen);
+ memcpy(ctx->key, key, key_len);
return 0;
}
-static void des3_128_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
-{
- struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
-
- crypt_s390_km(KM_TDEA_128_ENCRYPT, dctx->key, dst, (void*)src,
- DES3_128_BLOCK_SIZE);
-}
-
-static void des3_128_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+static void des3_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
- struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);
+ struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
- crypt_s390_km(KM_TDEA_128_DECRYPT, dctx->key, dst, (void*)src,
- DES3_128_BLOCK_SIZE);
+ crypt_s390_km(KM_TDEA_192_ENCRYPT, ctx->key, dst, src, DES_BLOCK_SIZE);
}
-static unsigned int des3_128_encrypt_ecb(const struct cipher_desc *desc,
- u8 *out, const u8 *in,
- unsigned int nbytes)
+static void des3_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
- struct crypt_s390_des3_128_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES3_128_BLOCK_SIZE - 1);
- ret = crypt_s390_km(KM_TDEA_128_ENCRYPT, sctx->key, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
-}
-
-static unsigned int des3_128_decrypt_ecb(const struct cipher_desc *desc,
- u8 *out, const u8 *in,
- unsigned int nbytes)
-{
- struct crypt_s390_des3_128_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES3_128_BLOCK_SIZE - 1);
- ret = crypt_s390_km(KM_TDEA_128_DECRYPT, sctx->key, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
-}
-
-static unsigned int des3_128_encrypt_cbc(const struct cipher_desc *desc,
- u8 *out, const u8 *in,
- unsigned int nbytes)
-{
- struct crypt_s390_des3_128_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES3_128_BLOCK_SIZE - 1);
-
- memcpy(sctx->iv, desc->info, DES3_128_BLOCK_SIZE);
- ret = crypt_s390_kmc(KMC_TDEA_128_ENCRYPT, &sctx->iv, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
+ struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
- memcpy(desc->info, sctx->iv, DES3_128_BLOCK_SIZE);
- return nbytes;
+ crypt_s390_km(KM_TDEA_192_DECRYPT, ctx->key, dst, src, DES_BLOCK_SIZE);
}
-static unsigned int des3_128_decrypt_cbc(const struct cipher_desc *desc,
- u8 *out, const u8 *in,
- unsigned int nbytes)
-{
- struct crypt_s390_des3_128_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES3_128_BLOCK_SIZE - 1);
-
- memcpy(&sctx->iv, desc->info, DES3_128_BLOCK_SIZE);
- ret = crypt_s390_kmc(KMC_TDEA_128_DECRYPT, &sctx->iv, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
-}
-
-static struct crypto_alg des3_128_alg = {
- .cra_name = "des3_ede128",
- .cra_driver_name = "des3_ede128-s390",
+static struct crypto_alg des3_alg = {
+ .cra_name = "des3_ede",
+ .cra_driver_name = "des3_ede-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
- .cra_blocksize = DES3_128_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des3_128_ctx),
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(des3_128_alg.cra_list),
+ .cra_list = LIST_HEAD_INIT(des3_alg.cra_list),
.cra_u = {
.cipher = {
- .cia_min_keysize = DES3_128_KEY_SIZE,
- .cia_max_keysize = DES3_128_KEY_SIZE,
- .cia_setkey = des3_128_setkey,
- .cia_encrypt = des3_128_encrypt,
- .cia_decrypt = des3_128_decrypt,
- .cia_encrypt_ecb = des3_128_encrypt_ecb,
- .cia_decrypt_ecb = des3_128_decrypt_ecb,
- .cia_encrypt_cbc = des3_128_encrypt_cbc,
- .cia_decrypt_cbc = des3_128_decrypt_cbc,
+ .cia_min_keysize = DES3_KEY_SIZE,
+ .cia_max_keysize = DES3_KEY_SIZE,
+ .cia_setkey = des3_setkey,
+ .cia_encrypt = des3_encrypt,
+ .cia_decrypt = des3_decrypt,
}
}
};
-static int ecb_des3_128_encrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int ecb_des3_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
{
- struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return ecb_desall_crypt(desc, KM_TDEA_128_ENCRYPT, sctx->key, &walk);
+ return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, ctx->key, &walk);
}
-static int ecb_des3_128_decrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int ecb_des3_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
{
- struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return ecb_desall_crypt(desc, KM_TDEA_128_DECRYPT, sctx->key, &walk);
+ return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, ctx->key, &walk);
}
-static struct crypto_alg ecb_des3_128_alg = {
- .cra_name = "ecb(des3_ede128)",
- .cra_driver_name = "ecb-des3_ede128-s390",
+static struct crypto_alg ecb_des3_alg = {
+ .cra_name = "ecb(des3_ede)",
+ .cra_driver_name = "ecb-des3_ede-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
- .cra_blocksize = DES3_128_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des3_128_ctx),
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(
- ecb_des3_128_alg.cra_list),
+ ecb_des3_alg.cra_list),
.cra_u = {
.blkcipher = {
- .min_keysize = DES3_128_KEY_SIZE,
- .max_keysize = DES3_128_KEY_SIZE,
- .setkey = des3_128_setkey,
- .encrypt = ecb_des3_128_encrypt,
- .decrypt = ecb_des3_128_decrypt,
+ .min_keysize = DES3_KEY_SIZE,
+ .max_keysize = DES3_KEY_SIZE,
+ .setkey = des3_setkey,
+ .encrypt = ecb_des3_encrypt,
+ .decrypt = ecb_des3_decrypt,
}
}
};
-static int cbc_des3_128_encrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int cbc_des3_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
{
- struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return cbc_desall_crypt(desc, KMC_TDEA_128_ENCRYPT, sctx->iv, &walk);
+ return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, ctx->iv, &walk);
}
-static int cbc_des3_128_decrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int cbc_des3_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
{
- struct crypt_s390_des3_128_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return cbc_desall_crypt(desc, KMC_TDEA_128_DECRYPT, sctx->iv, &walk);
+ return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, ctx->iv, &walk);
}
-static struct crypto_alg cbc_des3_128_alg = {
- .cra_name = "cbc(des3_ede128)",
- .cra_driver_name = "cbc-des3_ede128-s390",
+static struct crypto_alg cbc_des3_alg = {
+ .cra_name = "cbc(des3_ede)",
+ .cra_driver_name = "cbc-des3_ede-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
- .cra_blocksize = DES3_128_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des3_128_ctx),
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(
- cbc_des3_128_alg.cra_list),
+ cbc_des3_alg.cra_list),
.cra_u = {
.blkcipher = {
- .min_keysize = DES3_128_KEY_SIZE,
- .max_keysize = DES3_128_KEY_SIZE,
- .ivsize = DES3_128_BLOCK_SIZE,
- .setkey = des3_128_setkey,
- .encrypt = cbc_des3_128_encrypt,
- .decrypt = cbc_des3_128_decrypt,
+ .min_keysize = DES3_KEY_SIZE,
+ .max_keysize = DES3_KEY_SIZE,
+ .ivsize = DES_BLOCK_SIZE,
+ .setkey = des3_setkey,
+ .encrypt = cbc_des3_encrypt,
+ .decrypt = cbc_des3_decrypt,
}
}
};
-/*
- * RFC2451:
- *
- * For DES-EDE3, there is no known need to reject weak or
- * complementation keys. Any weakness is obviated by the use of
- * multiple keys.
- *
- * However, if the first two or last two independent 64-bit keys are
- * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
- * same as DES. Implementers MUST reject keys that exhibit this
- * property.
- *
- */
-static int des3_192_setkey(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen)
-{
- int i, ret;
- struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
- const u8 *temp_key = key;
- u32 *flags = &tfm->crt_flags;
-
- if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
- memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
- DES_KEY_SIZE))) {
-
- *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
- return -EINVAL;
- }
- for (i = 0; i < 3; i++, temp_key += DES_KEY_SIZE) {
- ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags);
- if (ret < 0)
- return ret;
+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 i, n, nbytes;
+ u8 buf[DES_BLOCK_SIZE];
+ u8 *out, *in;
+
+ memcpy(ctrblk, 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) {
+ /* align to block size, max. PAGE_SIZE */
+ n = (nbytes > PAGE_SIZE) ? PAGE_SIZE :
+ nbytes & ~(DES_BLOCK_SIZE - 1);
+ for (i = DES_BLOCK_SIZE; i < n; i += DES_BLOCK_SIZE) {
+ memcpy(ctrblk + i, ctrblk + i - DES_BLOCK_SIZE,
+ DES_BLOCK_SIZE);
+ crypto_inc(ctrblk + i, DES_BLOCK_SIZE);
+ }
+ ret = crypt_s390_kmctr(func, ctx->key, out, in, n, ctrblk);
+ BUG_ON((ret < 0) || (ret != n));
+ if (n > DES_BLOCK_SIZE)
+ memcpy(ctrblk, ctrblk + n - DES_BLOCK_SIZE,
+ DES_BLOCK_SIZE);
+ crypto_inc(ctrblk, DES_BLOCK_SIZE);
+ out += n;
+ in += n;
+ nbytes -= n;
+ }
+ ret = blkcipher_walk_done(desc, walk, nbytes);
}
- memcpy(dctx->key, key, keylen);
- return 0;
-}
-
-static void des3_192_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
-{
- struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
-
- crypt_s390_km(KM_TDEA_192_ENCRYPT, dctx->key, dst, (void*)src,
- DES3_192_BLOCK_SIZE);
-}
-
-static void des3_192_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
-{
- struct crypt_s390_des3_192_ctx *dctx = crypto_tfm_ctx(tfm);
-
- crypt_s390_km(KM_TDEA_192_DECRYPT, dctx->key, dst, (void*)src,
- DES3_192_BLOCK_SIZE);
-}
-
-static unsigned int des3_192_encrypt_ecb(const struct cipher_desc *desc,
- u8 *out, const u8 *in,
- unsigned int nbytes)
-{
- struct crypt_s390_des3_192_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES3_192_BLOCK_SIZE - 1);
- ret = crypt_s390_km(KM_TDEA_192_ENCRYPT, sctx->key, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
-}
-
-static unsigned int des3_192_decrypt_ecb(const struct cipher_desc *desc,
- u8 *out, const u8 *in,
- unsigned int nbytes)
-{
- struct crypt_s390_des3_192_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES3_192_BLOCK_SIZE - 1);
- ret = crypt_s390_km(KM_TDEA_192_DECRYPT, sctx->key, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
-}
-
-static unsigned int des3_192_encrypt_cbc(const struct cipher_desc *desc,
- u8 *out, const u8 *in,
- unsigned int nbytes)
-{
- struct crypt_s390_des3_192_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES3_192_BLOCK_SIZE - 1);
-
- memcpy(sctx->iv, desc->info, DES3_192_BLOCK_SIZE);
- ret = crypt_s390_kmc(KMC_TDEA_192_ENCRYPT, &sctx->iv, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
- memcpy(desc->info, sctx->iv, DES3_192_BLOCK_SIZE);
- return nbytes;
-}
-
-static unsigned int des3_192_decrypt_cbc(const struct cipher_desc *desc,
- u8 *out, const u8 *in,
- unsigned int nbytes)
-{
- struct crypt_s390_des3_192_ctx *sctx = crypto_tfm_ctx(desc->tfm);
- int ret;
-
- /* only use complete blocks */
- nbytes &= ~(DES3_192_BLOCK_SIZE - 1);
-
- memcpy(&sctx->iv, desc->info, DES3_192_BLOCK_SIZE);
- ret = crypt_s390_kmc(KMC_TDEA_192_DECRYPT, &sctx->iv, out, in, nbytes);
- BUG_ON((ret < 0) || (ret != nbytes));
-
- return nbytes;
-}
-
-static struct crypto_alg des3_192_alg = {
- .cra_name = "des3_ede",
- .cra_driver_name = "des3_ede-s390",
- .cra_priority = CRYPT_S390_PRIORITY,
- .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
- .cra_blocksize = DES3_192_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
- .cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(des3_192_alg.cra_list),
- .cra_u = {
- .cipher = {
- .cia_min_keysize = DES3_192_KEY_SIZE,
- .cia_max_keysize = DES3_192_KEY_SIZE,
- .cia_setkey = des3_192_setkey,
- .cia_encrypt = des3_192_encrypt,
- .cia_decrypt = des3_192_decrypt,
- .cia_encrypt_ecb = des3_192_encrypt_ecb,
- .cia_decrypt_ecb = des3_192_decrypt_ecb,
- .cia_encrypt_cbc = des3_192_encrypt_cbc,
- .cia_decrypt_cbc = des3_192_decrypt_cbc,
- }
+ /* 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, ctrblk);
+ BUG_ON(ret < 0 || ret != DES_BLOCK_SIZE);
+ memcpy(out, buf, nbytes);
+ crypto_inc(ctrblk, DES_BLOCK_SIZE);
+ ret = blkcipher_walk_done(desc, walk, 0);
}
-};
+ memcpy(walk->iv, ctrblk, DES_BLOCK_SIZE);
+ return ret;
+}
-static int ecb_des3_192_encrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int ctr_des_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
{
- struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, sctx->key, &walk);
+ return ctr_desall_crypt(desc, KMCTR_DEA_ENCRYPT, ctx, &walk);
}
-static int ecb_des3_192_decrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int ctr_des_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
{
- struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, sctx->key, &walk);
+ return ctr_desall_crypt(desc, KMCTR_DEA_DECRYPT, ctx, &walk);
}
-static struct crypto_alg ecb_des3_192_alg = {
- .cra_name = "ecb(des3_ede)",
- .cra_driver_name = "ecb-des3_ede-s390",
+static struct crypto_alg ctr_des_alg = {
+ .cra_name = "ctr(des)",
+ .cra_driver_name = "ctr-des-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
- .cra_blocksize = DES3_192_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(
- ecb_des3_192_alg.cra_list),
+ .cra_list = LIST_HEAD_INIT(ctr_des_alg.cra_list),
.cra_u = {
.blkcipher = {
- .min_keysize = DES3_192_KEY_SIZE,
- .max_keysize = DES3_192_KEY_SIZE,
- .setkey = des3_192_setkey,
- .encrypt = ecb_des3_192_encrypt,
- .decrypt = ecb_des3_192_decrypt,
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .ivsize = DES_BLOCK_SIZE,
+ .setkey = des_setkey,
+ .encrypt = ctr_des_encrypt,
+ .decrypt = ctr_des_decrypt,
}
}
};
-static int cbc_des3_192_encrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int ctr_des3_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
{
- struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, sctx->iv, &walk);
+ return ctr_desall_crypt(desc, KMCTR_TDEA_192_ENCRYPT, ctx, &walk);
}
-static int cbc_des3_192_decrypt(struct blkcipher_desc *desc,
- struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int ctr_des3_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
{
- struct crypt_s390_des3_192_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
+ struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
- return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, sctx->iv, &walk);
+ return ctr_desall_crypt(desc, KMCTR_TDEA_192_DECRYPT, ctx, &walk);
}
-static struct crypto_alg cbc_des3_192_alg = {
- .cra_name = "cbc(des3_ede)",
- .cra_driver_name = "cbc-des3_ede-s390",
+static struct crypto_alg ctr_des3_alg = {
+ .cra_name = "ctr(des3_ede)",
+ .cra_driver_name = "ctr-des3_ede-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
- .cra_blocksize = DES3_192_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct crypt_s390_des3_192_ctx),
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(
- cbc_des3_192_alg.cra_list),
+ .cra_list = LIST_HEAD_INIT(ctr_des3_alg.cra_list),
.cra_u = {
.blkcipher = {
- .min_keysize = DES3_192_KEY_SIZE,
- .max_keysize = DES3_192_KEY_SIZE,
- .ivsize = DES3_192_BLOCK_SIZE,
- .setkey = des3_192_setkey,
- .encrypt = cbc_des3_192_encrypt,
- .decrypt = cbc_des3_192_decrypt,
+ .min_keysize = DES3_KEY_SIZE,
+ .max_keysize = DES3_KEY_SIZE,
+ .ivsize = DES_BLOCK_SIZE,
+ .setkey = des3_setkey,
+ .encrypt = ctr_des3_encrypt,
+ .decrypt = ctr_des3_decrypt,
}
}
};
-static int init(void)
+static int __init des_s390_init(void)
{
- int ret = 0;
+ int ret;
- if (!crypt_s390_func_available(KM_DEA_ENCRYPT) ||
- !crypt_s390_func_available(KM_TDEA_128_ENCRYPT) ||
- !crypt_s390_func_available(KM_TDEA_192_ENCRYPT))
- return -ENOSYS;
+ if (!crypt_s390_func_available(KM_DEA_ENCRYPT, CRYPT_S390_MSA) ||
+ !crypt_s390_func_available(KM_TDEA_192_ENCRYPT, CRYPT_S390_MSA))
+ return -EOPNOTSUPP;
ret = crypto_register_alg(&des_alg);
if (ret)
ret = crypto_register_alg(&cbc_des_alg);
if (ret)
goto cbc_des_err;
-
- ret = crypto_register_alg(&des3_128_alg);
+ ret = crypto_register_alg(&des3_alg);
if (ret)
- goto des3_128_err;
- ret = crypto_register_alg(&ecb_des3_128_alg);
- if (ret)
- goto ecb_des3_128_err;
- ret = crypto_register_alg(&cbc_des3_128_alg);
- if (ret)
- goto cbc_des3_128_err;
-
- ret = crypto_register_alg(&des3_192_alg);
+ goto des3_err;
+ ret = crypto_register_alg(&ecb_des3_alg);
if (ret)
- goto des3_192_err;
- ret = crypto_register_alg(&ecb_des3_192_alg);
+ goto ecb_des3_err;
+ ret = crypto_register_alg(&cbc_des3_alg);
if (ret)
- goto ecb_des3_192_err;
- ret = crypto_register_alg(&cbc_des3_192_alg);
- if (ret)
- goto cbc_des3_192_err;
-
+ goto cbc_des3_err;
+
+ if (crypt_s390_func_available(KMCTR_DEA_ENCRYPT,
+ CRYPT_S390_MSA | CRYPT_S390_MSA4) &&
+ crypt_s390_func_available(KMCTR_TDEA_192_ENCRYPT,
+ CRYPT_S390_MSA | CRYPT_S390_MSA4)) {
+ ret = crypto_register_alg(&ctr_des_alg);
+ if (ret)
+ goto ctr_des_err;
+ ret = crypto_register_alg(&ctr_des3_alg);
+ if (ret)
+ goto ctr_des3_err;
+ ctrblk = (u8 *) __get_free_page(GFP_KERNEL);
+ if (!ctrblk) {
+ ret = -ENOMEM;
+ goto ctr_mem_err;
+ }
+ }
out:
return ret;
-cbc_des3_192_err:
- crypto_unregister_alg(&ecb_des3_192_alg);
-ecb_des3_192_err:
- crypto_unregister_alg(&des3_192_alg);
-des3_192_err:
- crypto_unregister_alg(&cbc_des3_128_alg);
-cbc_des3_128_err:
- crypto_unregister_alg(&ecb_des3_128_alg);
-ecb_des3_128_err:
- crypto_unregister_alg(&des3_128_alg);
-des3_128_err:
+ctr_mem_err:
+ crypto_unregister_alg(&ctr_des3_alg);
+ctr_des3_err:
+ crypto_unregister_alg(&ctr_des_alg);
+ctr_des_err:
+ crypto_unregister_alg(&cbc_des3_alg);
+cbc_des3_err:
+ crypto_unregister_alg(&ecb_des3_alg);
+ecb_des3_err:
+ crypto_unregister_alg(&des3_alg);
+des3_err:
crypto_unregister_alg(&cbc_des_alg);
cbc_des_err:
crypto_unregister_alg(&ecb_des_alg);
goto out;
}
-static void __exit fini(void)
+static void __exit des_s390_exit(void)
{
- crypto_unregister_alg(&cbc_des3_192_alg);
- crypto_unregister_alg(&ecb_des3_192_alg);
- crypto_unregister_alg(&des3_192_alg);
- crypto_unregister_alg(&cbc_des3_128_alg);
- crypto_unregister_alg(&ecb_des3_128_alg);
- crypto_unregister_alg(&des3_128_alg);
+ if (ctrblk) {
+ crypto_unregister_alg(&ctr_des_alg);
+ crypto_unregister_alg(&ctr_des3_alg);
+ free_page((unsigned long) ctrblk);
+ }
+ crypto_unregister_alg(&cbc_des3_alg);
+ crypto_unregister_alg(&ecb_des3_alg);
+ crypto_unregister_alg(&des3_alg);
crypto_unregister_alg(&cbc_des_alg);
crypto_unregister_alg(&ecb_des_alg);
crypto_unregister_alg(&des_alg);
}
-module_init(init);
-module_exit(fini);
+module_init(des_s390_init);
+module_exit(des_s390_exit);
MODULE_ALIAS("des");
MODULE_ALIAS("des3_ede");
Code Review / linux-3.10.git / blobdiff