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des_s390.c

/*
 * Cryptographic API.
 *
 * s390 implementation of the DES Cipher Algorithm.
 *
 * Copyright IBM Corp. 2003,2007
 * 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
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */

#include <crypto/algapi.h>
#include <linux/init.h>
#include <linux/module.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];
};

struct crypt_s390_des3_128_ctx {
      u8 iv[DES_BLOCK_SIZE];
      u8 key[DES3_128_KEY_SIZE];
};

struct crypt_s390_des3_192_ctx {
      u8 iv[DES_BLOCK_SIZE];
      u8 key[DES3_192_KEY_SIZE];
};

static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
                  unsigned int keylen)
{
      struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);
      u32 *flags = &tfm->crt_flags;
      int ret;

      /* 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;
}

static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
      struct crypt_s390_des_ctx *dctx = crypto_tfm_ctx(tfm);

      crypt_s390_km(KM_DEA_ENCRYPT, dctx->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);

      crypt_s390_km(KM_DEA_DECRYPT, dctx->key, out, in, DES_BLOCK_SIZE);
}

static struct crypto_alg des_alg = {
      .cra_name         =     "des",
      .cra_driver_name  =     "des-s390",
      .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_module       =     THIS_MODULE,
      .cra_list         =     LIST_HEAD_INIT(des_alg.cra_list),
      .cra_u                  =     {
            .cipher = {
                  .cia_min_keysize  =     DES_KEY_SIZE,
                  .cia_max_keysize  =     DES_KEY_SIZE,
                  .cia_setkey       =     des_setkey,
                  .cia_encrypt            =     des_encrypt,
                  .cia_decrypt            =     des_decrypt,
            }
      }
};

static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
                      void *param, struct blkcipher_walk *walk)
{
      int ret = blkcipher_walk_virt(desc, walk);
      unsigned int nbytes;

      while ((nbytes = walk->nbytes)) {
            /* 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_km(func, param, out, in, n);
            BUG_ON((ret < 0) || (ret != n));

            nbytes &= DES_BLOCK_SIZE - 1;
            ret = blkcipher_walk_done(desc, walk, nbytes);
      }

      return ret;
}

static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
                      void *param, 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);
      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);
            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);

out:
      return ret;
}

static int ecb_des_encrypt(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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, sctx->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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return ecb_desall_crypt(desc, KM_DEA_DECRYPT, sctx->key, &walk);
}

static struct crypto_alg ecb_des_alg = {
      .cra_name         =     "ecb(des)",
      .cra_driver_name  =     "ecb-des-s390",
      .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_type         =     &crypto_blkcipher_type,
      .cra_module       =     THIS_MODULE,
      .cra_list         =     LIST_HEAD_INIT(ecb_des_alg.cra_list),
      .cra_u                  =     {
            .blkcipher = {
                  .min_keysize            =     DES_KEY_SIZE,
                  .max_keysize            =     DES_KEY_SIZE,
                  .setkey                 =     des_setkey,
                  .encrypt          =     ecb_des_encrypt,
                  .decrypt          =     ecb_des_decrypt,
            }
      }
};

static int cbc_des_encrypt(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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, sctx->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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, sctx->iv, &walk);
}

static struct crypto_alg cbc_des_alg = {
      .cra_name         =     "cbc(des)",
      .cra_driver_name  =     "cbc-des-s390",
      .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_type         =     &crypto_blkcipher_type,
      .cra_module       =     THIS_MODULE,
      .cra_list         =     LIST_HEAD_INIT(cbc_des_alg.cra_list),
      .cra_u                  =     {
            .blkcipher = {
                  .min_keysize            =     DES_KEY_SIZE,
                  .max_keysize            =     DES_KEY_SIZE,
                  .ivsize                 =     DES_BLOCK_SIZE,
                  .setkey                 =     des_setkey,
                  .encrypt          =     cbc_des_encrypt,
                  .decrypt          =     cbc_des_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 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.
 *
 */
static int des3_128_setkey(struct crypto_tfm *tfm, const u8 *key,
                     unsigned int keylen)
{
      int i, ret;
      struct crypt_s390_des3_128_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))) {
            *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
            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);
      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)
{
      struct crypt_s390_des3_128_ctx *dctx = crypto_tfm_ctx(tfm);

      crypt_s390_km(KM_TDEA_128_DECRYPT, dctx->key, dst, (void*)src,
                  DES3_128_BLOCK_SIZE);
}

static struct crypto_alg des3_128_alg = {
      .cra_name         =     "des3_ede128",
      .cra_driver_name  =     "des3_ede128-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_module       =     THIS_MODULE,
      .cra_list         =     LIST_HEAD_INIT(des3_128_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,
            }
      }
};

static int ecb_des3_128_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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return ecb_desall_crypt(desc, KM_TDEA_128_ENCRYPT, sctx->key, &walk);
}

static int ecb_des3_128_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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return ecb_desall_crypt(desc, KM_TDEA_128_DECRYPT, sctx->key, &walk);
}

static struct crypto_alg ecb_des3_128_alg = {
      .cra_name         =     "ecb(des3_ede128)",
      .cra_driver_name  =     "ecb-des3_ede128-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_type         =     &crypto_blkcipher_type,
      .cra_module       =     THIS_MODULE,
      .cra_list         =     LIST_HEAD_INIT(
                                    ecb_des3_128_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,
            }
      }
};

static int cbc_des3_128_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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return cbc_desall_crypt(desc, KMC_TDEA_128_ENCRYPT, sctx->iv, &walk);
}

static int cbc_des3_128_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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return cbc_desall_crypt(desc, KMC_TDEA_128_DECRYPT, sctx->iv, &walk);
}

static struct crypto_alg cbc_des3_128_alg = {
      .cra_name         =     "cbc(des3_ede128)",
      .cra_driver_name  =     "cbc-des3_ede128-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_type         =     &crypto_blkcipher_type,
      .cra_module       =     THIS_MODULE,
      .cra_list         =     LIST_HEAD_INIT(
                                    cbc_des3_128_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,
            }
      }
};

/*
 * 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;
      }
      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 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,
            }
      }
};

static int ecb_des3_192_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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, sctx->key, &walk);
}

static int ecb_des3_192_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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, sctx->key, &walk);
}

static struct crypto_alg ecb_des3_192_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_192_BLOCK_SIZE,
      .cra_ctxsize            =     sizeof(struct crypt_s390_des3_192_ctx),
      .cra_type         =     &crypto_blkcipher_type,
      .cra_module       =     THIS_MODULE,
      .cra_list         =     LIST_HEAD_INIT(
                                    ecb_des3_192_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,
            }
      }
};

static int cbc_des3_192_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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, sctx->iv, &walk);
}

static int cbc_des3_192_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 blkcipher_walk walk;

      blkcipher_walk_init(&walk, dst, src, nbytes);
      return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, sctx->iv, &walk);
}

static struct crypto_alg cbc_des3_192_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_192_BLOCK_SIZE,
      .cra_ctxsize            =     sizeof(struct crypt_s390_des3_192_ctx),
      .cra_type         =     &crypto_blkcipher_type,
      .cra_module       =     THIS_MODULE,
      .cra_list         =     LIST_HEAD_INIT(
                                    cbc_des3_192_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,
            }
      }
};

static int init(void)
{
      int ret = 0;

      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 -EOPNOTSUPP;

      ret = crypto_register_alg(&des_alg);
      if (ret)
            goto des_err;
      ret = crypto_register_alg(&ecb_des_alg);
      if (ret)
            goto ecb_des_err;
      ret = crypto_register_alg(&cbc_des_alg);
      if (ret)
            goto cbc_des_err;

      ret = crypto_register_alg(&des3_128_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);
      if (ret)
            goto des3_192_err;
      ret = crypto_register_alg(&ecb_des3_192_alg);
      if (ret)
            goto ecb_des3_192_err;
      ret = crypto_register_alg(&cbc_des3_192_alg);
      if (ret)
            goto cbc_des3_192_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:
      crypto_unregister_alg(&cbc_des_alg);
cbc_des_err:
      crypto_unregister_alg(&ecb_des_alg);
ecb_des_err:
      crypto_unregister_alg(&des_alg);
des_err:
      goto out;
}

static void __exit fini(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);
      crypto_unregister_alg(&cbc_des_alg);
      crypto_unregister_alg(&ecb_des_alg);
      crypto_unregister_alg(&des_alg);
}

module_init(init);
module_exit(fini);

MODULE_ALIAS("des");
MODULE_ALIAS("des3_ede");

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");

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