Esempio n. 1
0
static int pcrypt_aead_init_tfm(struct crypto_tfm *tfm)
{
	int cpu, cpu_index;
	struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
	struct pcrypt_instance_ctx *ictx = crypto_instance_ctx(inst);
	struct pcrypt_aead_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_aead *cipher;

	ictx->tfm_count++;

	cpu_index = ictx->tfm_count % cpumask_weight(cpu_online_mask);

	ctx->cb_cpu = cpumask_first(cpu_online_mask);
	for (cpu = 0; cpu < cpu_index; cpu++)
		ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);

	cipher = crypto_spawn_aead(crypto_instance_ctx(inst));

	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	ctx->child = cipher;
	tfm->crt_aead.reqsize = sizeof(struct pcrypt_request)
		+ sizeof(struct aead_givcrypt_request)
		+ crypto_aead_reqsize(cipher);

	return 0;
}
Esempio n. 2
0
File: ctr.c Progetto: 03199618/linux
static void crypto_rfc3686_free(struct crypto_instance *inst)
{
	struct crypto_skcipher_spawn *spawn = crypto_instance_ctx(inst);

	crypto_drop_skcipher(spawn);
	kfree(inst);
}
Esempio n. 3
0
static void pcrypt_free(struct crypto_instance *inst)
{
	struct pcrypt_instance_ctx *ctx = crypto_instance_ctx(inst);

	crypto_drop_spawn(&ctx->spawn);
	kfree(inst);
}
Esempio n. 4
0
static int crypto_ccm_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct ccm_instance_ctx *ictx = crypto_instance_ctx(inst);
	struct crypto_ccm_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_cipher *cipher;
	struct crypto_ablkcipher *ctr;
	unsigned long align;
	int err;

	cipher = crypto_spawn_cipher(&ictx->cipher);
	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	ctr = crypto_spawn_skcipher(&ictx->ctr);
	err = PTR_ERR(ctr);
	if (IS_ERR(ctr))
		goto err_free_cipher;

	ctx->cipher = cipher;
	ctx->ctr = ctr;

	align = crypto_tfm_alg_alignmask(tfm);
	align &= ~(crypto_tfm_ctx_alignment() - 1);
	tfm->crt_aead.reqsize = align +
				sizeof(struct crypto_ccm_req_priv_ctx) +
				crypto_ablkcipher_reqsize(ctr);

	return 0;

err_free_cipher:
	crypto_free_cipher(cipher);
	return err;
}
Esempio n. 5
0
static void crypto_gcm_free(struct crypto_instance *inst)
{
	struct gcm_instance_ctx *ctx = crypto_instance_ctx(inst);

	crypto_drop_skcipher(&ctx->ctr);
	kfree(inst);
}
Esempio n. 6
0
static int crypto_cbc_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_spawn *spawn = crypto_instance_ctx(inst);
	struct crypto_cbc_ctx *ctx = crypto_tfm_ctx(tfm);

	switch (crypto_tfm_alg_blocksize(tfm)) {
	case 8:
		ctx->xor = xor_64;
		break;

	case 16:
		ctx->xor = xor_128;
		break;

	default:
		if (crypto_tfm_alg_blocksize(tfm) % 4)
			ctx->xor = xor_byte;
		else
			ctx->xor = xor_quad;
	}

	tfm = crypto_spawn_tfm(spawn);
	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	ctx->child = crypto_cipher_cast(tfm);
	return 0;
}
Esempio n. 7
0
static void crypto_rfc4543_free(struct crypto_instance *inst)
{
    struct crypto_rfc4543_instance_ctx *ctx = crypto_instance_ctx(inst);

    crypto_drop_aead(&ctx->aead);
    crypto_drop_skcipher(&ctx->null);

    kfree(inst);
}
Esempio n. 8
0
static int pcrypt_aead_init_tfm(struct crypto_tfm *tfm)
{
	int cpu, cpu_index;
	struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
	struct pcrypt_instance_ctx *ictx = crypto_instance_ctx(inst);
	struct pcrypt_aead_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_aead *cipher;

	ictx->tfm_count++;

<<<<<<< HEAD
Esempio n. 9
0
static int crypto_ecb_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_spawn *spawn = crypto_instance_ctx(inst);
	struct crypto_ecb_ctx *ctx = crypto_tfm_ctx(tfm);

	tfm = crypto_spawn_tfm(spawn);
	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	ctx->child = crypto_cipher_cast(tfm);
	return 0;
}
Esempio n. 10
0
int aead_geniv_init(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_aead *aead;

	aead = crypto_spawn_aead(crypto_instance_ctx(inst));
	if (IS_ERR(aead))
		return PTR_ERR(aead);

	tfm->crt_aead.base = aead;
	tfm->crt_aead.reqsize += crypto_aead_reqsize(aead);

	return 0;
}
int skcipher_geniv_init(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_ablkcipher *cipher;

	cipher = crypto_spawn_skcipher(crypto_instance_ctx(inst));
	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	tfm->crt_ablkcipher.base = cipher;
	tfm->crt_ablkcipher.reqsize += crypto_ablkcipher_reqsize(cipher);

	return 0;
}
Esempio n. 12
0
static int crypto_cts_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_spawn *spawn = crypto_instance_ctx(inst);
	struct crypto_cts_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_blkcipher *cipher;

	cipher = crypto_spawn_blkcipher(spawn);
	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	ctx->child = cipher;
	return 0;
}
Esempio n. 13
0
File: cryptd.c Progetto: 274914765/C
static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
{
    struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
    struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
    struct crypto_spawn *spawn = &ictx->spawn;
    struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
    struct crypto_blkcipher *cipher;

    cipher = crypto_spawn_blkcipher(spawn);
    if (IS_ERR(cipher))
        return PTR_ERR(cipher);

    ctx->child = cipher;
    tfm->crt_ablkcipher.reqsize =
        sizeof(struct cryptd_blkcipher_request_ctx);
    return 0;
}
Esempio n. 14
0
static int crypto_ecb_init_tfm(struct crypto_tfm *tfm)
{
    struct crypto_instance *inst = (void *)tfm->__crt_alg;
    struct crypto_spawn *spawn = crypto_instance_ctx(inst);
    struct crypto_ecb_ctx *ctx = crypto_tfm_ctx(tfm);
    struct crypto_cipher *cipher;

    cipher = crypto_spawn_cipher(spawn);
    if (IS_ERR(cipher))
        return PTR_ERR(cipher);

    ctx->child = cipher;
#ifdef CONFIG_CRYPTO_DEV_REALTEK
    rtl_cipher_init_ctx(tfm, &ctx->rtl_ctx);
#endif
    return 0;
}
Esempio n. 15
0
int skcipher_geniv_init(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_ablkcipher *cipher;

#ifdef CONFIG_CRYPTO_FIPS
    if (unlikely(in_fips_err()))
        return (-EACCES);
#endif

	cipher = crypto_spawn_skcipher(crypto_instance_ctx(inst));
	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	tfm->crt_ablkcipher.base = cipher;
	tfm->crt_ablkcipher.reqsize += crypto_ablkcipher_reqsize(cipher);

	return 0;
}
Esempio n. 16
0
File: cryptd.c Progetto: 274914765/C
static struct crypto_instance *cryptd_alloc_instance(struct crypto_alg *alg,
                             struct cryptd_state *state)
{
    struct crypto_instance *inst;
    struct cryptd_instance_ctx *ctx;
    int err;

    inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
    if (!inst) {
        inst = ERR_PTR(-ENOMEM);
        goto out;
    }

    err = -ENAMETOOLONG;
    if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
             "cryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
        goto out_free_inst;

    ctx = crypto_instance_ctx(inst);
    err = crypto_init_spawn(&ctx->spawn, alg, inst,
                CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
    if (err)
        goto out_free_inst;

    ctx->state = state;

    memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);

    inst->alg.cra_priority = alg->cra_priority + 50;
    inst->alg.cra_blocksize = alg->cra_blocksize;
    inst->alg.cra_alignmask = alg->cra_alignmask;

out:
    return inst;

out_free_inst:
    kfree(inst);
    inst = ERR_PTR(err);
    goto out;
}
Esempio n. 17
0
File: ctr.c Progetto: 03199618/linux
static int crypto_rfc3686_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_skcipher_spawn *spawn = crypto_instance_ctx(inst);
	struct crypto_rfc3686_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_ablkcipher *cipher;
	unsigned long align;

	cipher = crypto_spawn_skcipher(spawn);
	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	ctx->child = cipher;

	align = crypto_tfm_alg_alignmask(tfm);
	align &= ~(crypto_tfm_ctx_alignment() - 1);
	tfm->crt_ablkcipher.reqsize = align +
		sizeof(struct crypto_rfc3686_req_ctx) +
		crypto_ablkcipher_reqsize(cipher);

	return 0;
}
Esempio n. 18
0
static int crypto_rfc4309_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_aead_spawn *spawn = crypto_instance_ctx(inst);
	struct crypto_rfc4309_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_aead *aead;
	unsigned long align;

	aead = crypto_spawn_aead(spawn);
	if (IS_ERR(aead))
		return PTR_ERR(aead);

	ctx->child = aead;

	align = crypto_aead_alignmask(aead);
	align &= ~(crypto_tfm_ctx_alignment() - 1);
	tfm->crt_aead.reqsize = sizeof(struct aead_request) +
				ALIGN(crypto_aead_reqsize(aead),
				      crypto_tfm_ctx_alignment()) +
				align + 16;

	return 0;
}
Esempio n. 19
0
static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
{
    struct crypto_instance *inst = (void *)tfm->__crt_alg;
    struct gcm_instance_ctx *ictx = crypto_instance_ctx(inst);
    struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm);
    struct crypto_ablkcipher *ctr;
    struct crypto_ahash *ghash;
    unsigned long align;
    int err;

    ghash = crypto_spawn_ahash(&ictx->ghash);
    if (IS_ERR(ghash))
        return PTR_ERR(ghash);

    ctr = crypto_spawn_skcipher(&ictx->ctr);
    err = PTR_ERR(ctr);
    if (IS_ERR(ctr))
        goto err_free_hash;

    ctx->ctr = ctr;
    ctx->ghash = ghash;

    align = crypto_tfm_alg_alignmask(tfm);
    align &= ~(crypto_tfm_ctx_alignment() - 1);
    tfm->crt_aead.reqsize = align +
                            offsetof(struct crypto_gcm_req_priv_ctx, u) +
                            max(sizeof(struct ablkcipher_request) +
                                crypto_ablkcipher_reqsize(ctr),
                                sizeof(struct ahash_request) +
                                crypto_ahash_reqsize(ghash));

    return 0;

err_free_hash:
    crypto_free_ahash(ghash);
    return err;
}
Esempio n. 20
0
static int crypto_rfc4543_init_tfm(struct crypto_tfm *tfm)
{
    struct crypto_instance *inst = (void *)tfm->__crt_alg;
    struct crypto_rfc4543_instance_ctx *ictx = crypto_instance_ctx(inst);
    struct crypto_aead_spawn *spawn = &ictx->aead;
    struct crypto_rfc4543_ctx *ctx = crypto_tfm_ctx(tfm);
    struct crypto_aead *aead;
    struct crypto_blkcipher *null;
    unsigned long align;
    int err = 0;

    aead = crypto_spawn_aead(spawn);
    if (IS_ERR(aead))
        return PTR_ERR(aead);

    null = crypto_spawn_blkcipher(&ictx->null.base);
    err = PTR_ERR(null);
    if (IS_ERR(null))
        goto err_free_aead;

    ctx->child = aead;
    ctx->null = null;

    align = crypto_aead_alignmask(aead);
    align &= ~(crypto_tfm_ctx_alignment() - 1);
    tfm->crt_aead.reqsize = sizeof(struct crypto_rfc4543_req_ctx) +
                            ALIGN(crypto_aead_reqsize(aead),
                                  crypto_tfm_ctx_alignment()) +
                            align + 16;

    return 0;

err_free_aead:
    crypto_free_aead(aead);
    return err;
}
Esempio n. 21
0
static struct crypto_instance *crypto_rfc4309_alloc(struct rtattr **tb)
{
	struct crypto_attr_type *algt;
	struct crypto_instance *inst;
	struct crypto_aead_spawn *spawn;
	struct crypto_alg *alg;
	const char *ccm_name;
	int err;

	algt = crypto_get_attr_type(tb);
	if (IS_ERR(algt))
		return ERR_CAST(algt);

	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
		return ERR_PTR(-EINVAL);

	ccm_name = crypto_attr_alg_name(tb[1]);
	if (IS_ERR(ccm_name))
		return ERR_CAST(ccm_name);

	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
	if (!inst)
		return ERR_PTR(-ENOMEM);

	spawn = crypto_instance_ctx(inst);
	crypto_set_aead_spawn(spawn, inst);
	err = crypto_grab_aead(spawn, ccm_name, 0,
			       crypto_requires_sync(algt->type, algt->mask));
	if (err)
		goto out_free_inst;

	alg = crypto_aead_spawn_alg(spawn);

	err = -EINVAL;

	/* We only support 16-byte blocks. */
	if (alg->cra_aead.ivsize != 16)
		goto out_drop_alg;

	/* Not a stream cipher? */
	if (alg->cra_blocksize != 1)
		goto out_drop_alg;

	err = -ENAMETOOLONG;
	if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
		     "rfc4309(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME ||
	    snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
		     "rfc4309(%s)", alg->cra_driver_name) >=
	    CRYPTO_MAX_ALG_NAME)
		goto out_drop_alg;

	inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
	inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC;
	inst->alg.cra_priority = alg->cra_priority;
	inst->alg.cra_blocksize = 1;
	inst->alg.cra_alignmask = alg->cra_alignmask;
	inst->alg.cra_type = &crypto_nivaead_type;

	inst->alg.cra_aead.ivsize = 8;
	inst->alg.cra_aead.maxauthsize = 16;

	inst->alg.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx);

	inst->alg.cra_init = crypto_rfc4309_init_tfm;
	inst->alg.cra_exit = crypto_rfc4309_exit_tfm;

	inst->alg.cra_aead.setkey = crypto_rfc4309_setkey;
	inst->alg.cra_aead.setauthsize = crypto_rfc4309_setauthsize;
	inst->alg.cra_aead.encrypt = crypto_rfc4309_encrypt;
	inst->alg.cra_aead.decrypt = crypto_rfc4309_decrypt;

	inst->alg.cra_aead.geniv = "seqiv";

out:
	return inst;

out_drop_alg:
	crypto_drop_aead(spawn);
out_free_inst:
	kfree(inst);
	inst = ERR_PTR(err);
	goto out;
}
Esempio n. 22
0
static struct crypto_instance *crypto_ccm_alloc_common(struct rtattr **tb,
						       const char *full_name,
						       const char *ctr_name,
						       const char *cipher_name)
{
	struct crypto_attr_type *algt;
	struct crypto_instance *inst;
	struct crypto_alg *ctr;
	struct crypto_alg *cipher;
	struct ccm_instance_ctx *ictx;
	int err;

	algt = crypto_get_attr_type(tb);
	if (IS_ERR(algt))
		return ERR_CAST(algt);

	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
		return ERR_PTR(-EINVAL);

	cipher = crypto_alg_mod_lookup(cipher_name,  CRYPTO_ALG_TYPE_CIPHER,
				       CRYPTO_ALG_TYPE_MASK);
	if (IS_ERR(cipher))
		return ERR_CAST(cipher);

	err = -EINVAL;
	if (cipher->cra_blocksize != 16)
		goto out_put_cipher;

	inst = kzalloc(sizeof(*inst) + sizeof(*ictx), GFP_KERNEL);
	err = -ENOMEM;
	if (!inst)
		goto out_put_cipher;

	ictx = crypto_instance_ctx(inst);

	err = crypto_init_spawn(&ictx->cipher, cipher, inst,
				CRYPTO_ALG_TYPE_MASK);
	if (err)
		goto err_free_inst;

	crypto_set_skcipher_spawn(&ictx->ctr, inst);
	err = crypto_grab_skcipher(&ictx->ctr, ctr_name, 0,
				   crypto_requires_sync(algt->type,
							algt->mask));
	if (err)
		goto err_drop_cipher;

	ctr = crypto_skcipher_spawn_alg(&ictx->ctr);

	/* Not a stream cipher? */
	err = -EINVAL;
	if (ctr->cra_blocksize != 1)
		goto err_drop_ctr;

	/* We want the real thing! */
	if (ctr->cra_ablkcipher.ivsize != 16)
		goto err_drop_ctr;

	err = -ENAMETOOLONG;
	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
		     "ccm_base(%s,%s)", ctr->cra_driver_name,
		     cipher->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
		goto err_drop_ctr;

	memcpy(inst->alg.cra_name, full_name, CRYPTO_MAX_ALG_NAME);

	inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
	inst->alg.cra_flags |= ctr->cra_flags & CRYPTO_ALG_ASYNC;
	inst->alg.cra_priority = cipher->cra_priority + ctr->cra_priority;
	inst->alg.cra_blocksize = 1;
	inst->alg.cra_alignmask = cipher->cra_alignmask | ctr->cra_alignmask |
				  (__alignof__(u32) - 1);
	inst->alg.cra_type = &crypto_aead_type;
	inst->alg.cra_aead.ivsize = 16;
	inst->alg.cra_aead.maxauthsize = 16;
	inst->alg.cra_ctxsize = sizeof(struct crypto_ccm_ctx);
	inst->alg.cra_init = crypto_ccm_init_tfm;
	inst->alg.cra_exit = crypto_ccm_exit_tfm;
	inst->alg.cra_aead.setkey = crypto_ccm_setkey;
	inst->alg.cra_aead.setauthsize = crypto_ccm_setauthsize;
	inst->alg.cra_aead.encrypt = crypto_ccm_encrypt;
	inst->alg.cra_aead.decrypt = crypto_ccm_decrypt;

out:
	crypto_mod_put(cipher);
	return inst;

err_drop_ctr:
	crypto_drop_skcipher(&ictx->ctr);
err_drop_cipher:
	crypto_drop_spawn(&ictx->cipher);
err_free_inst:
	kfree(inst);
out_put_cipher:
	inst = ERR_PTR(err);
	goto out;
}
Esempio n. 23
0
static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb,
        const char *full_name,
        const char *ctr_name,
        const char *ghash_name)
{
    struct crypto_attr_type *algt;
    struct crypto_instance *inst;
    struct crypto_alg *ctr;
    struct crypto_alg *ghash_alg;
    struct ahash_alg *ghash_ahash_alg;
    struct gcm_instance_ctx *ctx;
    int err;

    algt = crypto_get_attr_type(tb);
    if (IS_ERR(algt))
        return ERR_CAST(algt);

    if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
        return ERR_PTR(-EINVAL);

    ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type,
                                CRYPTO_ALG_TYPE_HASH,
                                CRYPTO_ALG_TYPE_AHASH_MASK |
                                crypto_requires_sync(algt->type,
                                        algt->mask));
    if (IS_ERR(ghash_alg))
        return ERR_CAST(ghash_alg);

    err = -ENOMEM;
    inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
    if (!inst)
        goto out_put_ghash;

    ctx = crypto_instance_ctx(inst);
    ghash_ahash_alg = container_of(ghash_alg, struct ahash_alg, halg.base);
    err = crypto_init_ahash_spawn(&ctx->ghash, &ghash_ahash_alg->halg,
                                  inst);
    if (err)
        goto err_free_inst;

    crypto_set_skcipher_spawn(&ctx->ctr, inst);
    err = crypto_grab_skcipher(&ctx->ctr, ctr_name, 0,
                               crypto_requires_sync(algt->type,
                                       algt->mask));
    if (err)
        goto err_drop_ghash;

    ctr = crypto_skcipher_spawn_alg(&ctx->ctr);

    /* We only support 16-byte blocks. */
    if (ctr->cra_ablkcipher.ivsize != 16)
        goto out_put_ctr;

    /* Not a stream cipher? */
    err = -EINVAL;
    if (ctr->cra_blocksize != 1)
        goto out_put_ctr;

    err = -ENAMETOOLONG;
    if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
                 "gcm_base(%s,%s)", ctr->cra_driver_name,
                 ghash_alg->cra_driver_name) >=
            CRYPTO_MAX_ALG_NAME)
        goto out_put_ctr;

    memcpy(inst->alg.cra_name, full_name, CRYPTO_MAX_ALG_NAME);

    inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
    inst->alg.cra_flags |= ctr->cra_flags & CRYPTO_ALG_ASYNC;
    inst->alg.cra_priority = ctr->cra_priority;
    inst->alg.cra_blocksize = 1;
    inst->alg.cra_alignmask = ctr->cra_alignmask | (__alignof__(u64) - 1);
    inst->alg.cra_type = &crypto_aead_type;
    inst->alg.cra_aead.ivsize = 16;
    inst->alg.cra_aead.maxauthsize = 16;
    inst->alg.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
    inst->alg.cra_init = crypto_gcm_init_tfm;
    inst->alg.cra_exit = crypto_gcm_exit_tfm;
    inst->alg.cra_aead.setkey = crypto_gcm_setkey;
    inst->alg.cra_aead.setauthsize = crypto_gcm_setauthsize;
    inst->alg.cra_aead.encrypt = crypto_gcm_encrypt;
    inst->alg.cra_aead.decrypt = crypto_gcm_decrypt;

out:
    crypto_mod_put(ghash_alg);
    return inst;

out_put_ctr:
    crypto_drop_skcipher(&ctx->ctr);
err_drop_ghash:
    crypto_drop_ahash(&ctx->ghash);
err_free_inst:
    kfree(inst);
out_put_ghash:
    inst = ERR_PTR(err);
    goto out;
}
Esempio n. 24
0
File: lrw.c Progetto: E-LLP/n900
static int crypt(struct blkcipher_desc *d,
		 struct blkcipher_walk *w, struct priv *ctx,
		 void (*fn)(struct crypto_tfm *, u8 *, const u8 *))
{
	int err;
	unsigned int avail;
	const int bs = crypto_cipher_blocksize(ctx->child);
	struct sinfo s = {
		.tfm = crypto_cipher_tfm(ctx->child),
		.fn = fn
	};
	be128 *iv;
	u8 *wsrc;
	u8 *wdst;

	err = blkcipher_walk_virt(d, w);
	if (!(avail = w->nbytes))
		return err;

	wsrc = w->src.virt.addr;
	wdst = w->dst.virt.addr;

	/* calculate first value of T */
	iv = (be128 *)w->iv;
	s.t = *iv;

	/* T <- I*Key2 */
	gf128mul_64k_bbe(&s.t, ctx->table);

	goto first;

	for (;;) {
		do {
			/* T <- I*Key2, using the optimization
			 * discussed in the specification */
			be128_xor(&s.t, &s.t, &ctx->mulinc[get_index128(iv)]);
			inc(iv);

first:
			lrw_round(&s, wdst, wsrc);

			wsrc += bs;
			wdst += bs;
		} while ((avail -= bs) >= bs);

		err = blkcipher_walk_done(d, w, avail);
		if (!(avail = w->nbytes))
			break;

		wsrc = w->src.virt.addr;
		wdst = w->dst.virt.addr;
	}

	return err;
}

static int encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		   struct scatterlist *src, unsigned int nbytes)
{
	struct priv *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk w;

	blkcipher_walk_init(&w, dst, src, nbytes);
	return crypt(desc, &w, ctx,
		     crypto_cipher_alg(ctx->child)->cia_encrypt);
}

static int decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		   struct scatterlist *src, unsigned int nbytes)
{
	struct priv *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk w;

	blkcipher_walk_init(&w, dst, src, nbytes);
	return crypt(desc, &w, ctx,
		     crypto_cipher_alg(ctx->child)->cia_decrypt);
}

static int init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_cipher *cipher;
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_spawn *spawn = crypto_instance_ctx(inst);
	struct priv *ctx = crypto_tfm_ctx(tfm);
	u32 *flags = &tfm->crt_flags;

	cipher = crypto_spawn_cipher(spawn);
	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	if (crypto_cipher_blocksize(cipher) != 16) {
		*flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
		return -EINVAL;
	}

	ctx->child = cipher;
	return 0;
}

static void exit_tfm(struct crypto_tfm *tfm)
{
	struct priv *ctx = crypto_tfm_ctx(tfm);
	if (ctx->table)
		gf128mul_free_64k(ctx->table);
	crypto_free_cipher(ctx->child);
}

static struct crypto_instance *alloc(struct rtattr **tb)
{
	struct crypto_instance *inst;
	struct crypto_alg *alg;
	int err;

	err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_BLKCIPHER);
	if (err)
		return ERR_PTR(err);

	alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
				  CRYPTO_ALG_TYPE_MASK);
	if (IS_ERR(alg))
		return ERR_CAST(alg);

	inst = crypto_alloc_instance("lrw", alg);
	if (IS_ERR(inst))
		goto out_put_alg;

	inst->alg.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER;
	inst->alg.cra_priority = alg->cra_priority;
	inst->alg.cra_blocksize = alg->cra_blocksize;

	if (alg->cra_alignmask < 7) inst->alg.cra_alignmask = 7;
	else inst->alg.cra_alignmask = alg->cra_alignmask;
	inst->alg.cra_type = &crypto_blkcipher_type;

	if (!(alg->cra_blocksize % 4))
		inst->alg.cra_alignmask |= 3;
	inst->alg.cra_blkcipher.ivsize = alg->cra_blocksize;
	inst->alg.cra_blkcipher.min_keysize =
		alg->cra_cipher.cia_min_keysize + alg->cra_blocksize;
	inst->alg.cra_blkcipher.max_keysize =
		alg->cra_cipher.cia_max_keysize + alg->cra_blocksize;

	inst->alg.cra_ctxsize = sizeof(struct priv);

	inst->alg.cra_init = init_tfm;
	inst->alg.cra_exit = exit_tfm;

	inst->alg.cra_blkcipher.setkey = setkey;
	inst->alg.cra_blkcipher.encrypt = encrypt;
	inst->alg.cra_blkcipher.decrypt = decrypt;

out_put_alg:
	crypto_mod_put(alg);
	return inst;
}

static void free(struct crypto_instance *inst)
{
	crypto_drop_spawn(crypto_instance_ctx(inst));
	kfree(inst);
}
Esempio n. 25
0
static int crypt(struct blkcipher_desc *d,
		 struct blkcipher_walk *w, struct priv *ctx,
		 void (*fn)(struct crypto_tfm *, u8 *, const u8 *))
{
	int err;
	unsigned int avail;
	const int bs = LRW_BLOCK_SIZE;
	struct sinfo s = {
		.tfm = crypto_cipher_tfm(ctx->child),
		.fn = fn
	};
	be128 *iv;
	u8 *wsrc;
	u8 *wdst;

	err = blkcipher_walk_virt(d, w);
	if (!(avail = w->nbytes))
		return err;

	wsrc = w->src.virt.addr;
	wdst = w->dst.virt.addr;

	/* calculate first value of T */
	iv = (be128 *)w->iv;
	s.t = *iv;

	/* T <- I*Key2 */
	gf128mul_64k_bbe(&s.t, ctx->table.table);

	goto first;

	for (;;) {
		do {
			/* T <- I*Key2, using the optimization
			 * discussed in the specification */
			be128_xor(&s.t, &s.t,
				  &ctx->table.mulinc[get_index128(iv)]);
			inc(iv);

first:
			lrw_round(&s, wdst, wsrc);

			wsrc += bs;
			wdst += bs;
		} while ((avail -= bs) >= bs);

		err = blkcipher_walk_done(d, w, avail);
		if (!(avail = w->nbytes))
			break;

		wsrc = w->src.virt.addr;
		wdst = w->dst.virt.addr;
	}

	return err;
}

static int encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		   struct scatterlist *src, unsigned int nbytes)
{
	struct priv *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk w;

	blkcipher_walk_init(&w, dst, src, nbytes);
	return crypt(desc, &w, ctx,
		     crypto_cipher_alg(ctx->child)->cia_encrypt);
}

static int decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		   struct scatterlist *src, unsigned int nbytes)
{
	struct priv *ctx = crypto_blkcipher_ctx(desc->tfm);
	struct blkcipher_walk w;

	blkcipher_walk_init(&w, dst, src, nbytes);
	return crypt(desc, &w, ctx,
		     crypto_cipher_alg(ctx->child)->cia_decrypt);
}

int lrw_crypt(struct blkcipher_desc *desc, struct scatterlist *sdst,
	      struct scatterlist *ssrc, unsigned int nbytes,
	      struct lrw_crypt_req *req)
{
	const unsigned int bsize = LRW_BLOCK_SIZE;
	const unsigned int max_blks = req->tbuflen / bsize;
	struct lrw_table_ctx *ctx = req->table_ctx;
	struct blkcipher_walk walk;
	unsigned int nblocks;
	be128 *iv, *src, *dst, *t;
	be128 *t_buf = req->tbuf;
	int err, i;

	BUG_ON(max_blks < 1);

	blkcipher_walk_init(&walk, sdst, ssrc, nbytes);

	err = blkcipher_walk_virt(desc, &walk);
	nbytes = walk.nbytes;
	if (!nbytes)
		return err;

	nblocks = min(walk.nbytes / bsize, max_blks);
	src = (be128 *)walk.src.virt.addr;
	dst = (be128 *)walk.dst.virt.addr;

	/* calculate first value of T */
	iv = (be128 *)walk.iv;
	t_buf[0] = *iv;

	/* T <- I*Key2 */
	gf128mul_64k_bbe(&t_buf[0], ctx->table);

	i = 0;
	goto first;

	for (;;) {
		do {
			for (i = 0; i < nblocks; i++) {
				/* T <- I*Key2, using the optimization
				 * discussed in the specification */
				be128_xor(&t_buf[i], t,
						&ctx->mulinc[get_index128(iv)]);
				inc(iv);
first:
				t = &t_buf[i];

				/* PP <- T xor P */
				be128_xor(dst + i, t, src + i);
			}

			/* CC <- E(Key2,PP) */
			req->crypt_fn(req->crypt_ctx, (u8 *)dst,
				      nblocks * bsize);

			/* C <- T xor CC */
			for (i = 0; i < nblocks; i++)
				be128_xor(dst + i, dst + i, &t_buf[i]);

			src += nblocks;
			dst += nblocks;
			nbytes -= nblocks * bsize;
			nblocks = min(nbytes / bsize, max_blks);
		} while (nblocks > 0);

		err = blkcipher_walk_done(desc, &walk, nbytes);
		nbytes = walk.nbytes;
		if (!nbytes)
			break;

		nblocks = min(nbytes / bsize, max_blks);
		src = (be128 *)walk.src.virt.addr;
		dst = (be128 *)walk.dst.virt.addr;
	}

	return err;
}
EXPORT_SYMBOL_GPL(lrw_crypt);

static int init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_cipher *cipher;
	struct crypto_instance *inst = (void *)tfm->__crt_alg;
	struct crypto_spawn *spawn = crypto_instance_ctx(inst);
	struct priv *ctx = crypto_tfm_ctx(tfm);
	u32 *flags = &tfm->crt_flags;

	cipher = crypto_spawn_cipher(spawn);
	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	if (crypto_cipher_blocksize(cipher) != LRW_BLOCK_SIZE) {
		*flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
		crypto_free_cipher(cipher);
		return -EINVAL;
	}

	ctx->child = cipher;
	return 0;
}

static void exit_tfm(struct crypto_tfm *tfm)
{
	struct priv *ctx = crypto_tfm_ctx(tfm);

	lrw_free_table(&ctx->table);
	crypto_free_cipher(ctx->child);
}

static struct crypto_instance *alloc(struct rtattr **tb)
{
	struct crypto_instance *inst;
	struct crypto_alg *alg;
	int err;

	err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_BLKCIPHER);
	if (err)
		return ERR_PTR(err);

	alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
				  CRYPTO_ALG_TYPE_MASK);
	if (IS_ERR(alg))
		return ERR_CAST(alg);

	inst = crypto_alloc_instance("lrw", alg);
	if (IS_ERR(inst))
		goto out_put_alg;

	inst->alg.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER;
	inst->alg.cra_priority = alg->cra_priority;
	inst->alg.cra_blocksize = alg->cra_blocksize;

	if (alg->cra_alignmask < 7) inst->alg.cra_alignmask = 7;
	else inst->alg.cra_alignmask = alg->cra_alignmask;
	inst->alg.cra_type = &crypto_blkcipher_type;

	if (!(alg->cra_blocksize % 4))
		inst->alg.cra_alignmask |= 3;
	inst->alg.cra_blkcipher.ivsize = alg->cra_blocksize;
	inst->alg.cra_blkcipher.min_keysize =
		alg->cra_cipher.cia_min_keysize + alg->cra_blocksize;
	inst->alg.cra_blkcipher.max_keysize =
		alg->cra_cipher.cia_max_keysize + alg->cra_blocksize;

	inst->alg.cra_ctxsize = sizeof(struct priv);

	inst->alg.cra_init = init_tfm;
	inst->alg.cra_exit = exit_tfm;

	inst->alg.cra_blkcipher.setkey = setkey;
	inst->alg.cra_blkcipher.encrypt = encrypt;
	inst->alg.cra_blkcipher.decrypt = decrypt;

out_put_alg:
	crypto_mod_put(alg);
	return inst;
}

static void free(struct crypto_instance *inst)
{
	crypto_drop_spawn(crypto_instance_ctx(inst));
	kfree(inst);
}
Esempio n. 26
0
File: ctr.c Progetto: 03199618/linux
static struct crypto_instance *crypto_rfc3686_alloc(struct rtattr **tb)
{
	struct crypto_attr_type *algt;
	struct crypto_instance *inst;
	struct crypto_alg *alg;
	struct crypto_skcipher_spawn *spawn;
	const char *cipher_name;
	int err;

	algt = crypto_get_attr_type(tb);
	if (IS_ERR(algt))
		return ERR_CAST(algt);

	if ((algt->type ^ CRYPTO_ALG_TYPE_BLKCIPHER) & algt->mask)
		return ERR_PTR(-EINVAL);

	cipher_name = crypto_attr_alg_name(tb[1]);
	if (IS_ERR(cipher_name))
		return ERR_CAST(cipher_name);

	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
	if (!inst)
		return ERR_PTR(-ENOMEM);

	spawn = crypto_instance_ctx(inst);

	crypto_set_skcipher_spawn(spawn, inst);
	err = crypto_grab_skcipher(spawn, cipher_name, 0,
				   crypto_requires_sync(algt->type,
							algt->mask));
	if (err)
		goto err_free_inst;

	alg = crypto_skcipher_spawn_alg(spawn);

	/* We only support 16-byte blocks. */
	err = -EINVAL;
	if (alg->cra_ablkcipher.ivsize != CTR_RFC3686_BLOCK_SIZE)
		goto err_drop_spawn;

	/* Not a stream cipher? */
	if (alg->cra_blocksize != 1)
		goto err_drop_spawn;

	err = -ENAMETOOLONG;
	if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "rfc3686(%s)",
		     alg->cra_name) >= CRYPTO_MAX_ALG_NAME)
		goto err_drop_spawn;
	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
		     "rfc3686(%s)", alg->cra_driver_name) >=
			CRYPTO_MAX_ALG_NAME)
		goto err_drop_spawn;

	inst->alg.cra_priority = alg->cra_priority;
	inst->alg.cra_blocksize = 1;
	inst->alg.cra_alignmask = alg->cra_alignmask;

	inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
			      (alg->cra_flags & CRYPTO_ALG_ASYNC);
	inst->alg.cra_type = &crypto_ablkcipher_type;

	inst->alg.cra_ablkcipher.ivsize = CTR_RFC3686_IV_SIZE;
	inst->alg.cra_ablkcipher.min_keysize =
		alg->cra_ablkcipher.min_keysize + CTR_RFC3686_NONCE_SIZE;
	inst->alg.cra_ablkcipher.max_keysize =
		alg->cra_ablkcipher.max_keysize + CTR_RFC3686_NONCE_SIZE;

	inst->alg.cra_ablkcipher.geniv = "seqiv";

	inst->alg.cra_ablkcipher.setkey = crypto_rfc3686_setkey;
	inst->alg.cra_ablkcipher.encrypt = crypto_rfc3686_crypt;
	inst->alg.cra_ablkcipher.decrypt = crypto_rfc3686_crypt;

	inst->alg.cra_ctxsize = sizeof(struct crypto_rfc3686_ctx);

	inst->alg.cra_init = crypto_rfc3686_init_tfm;
	inst->alg.cra_exit = crypto_rfc3686_exit_tfm;

	return inst;

err_drop_spawn:
	crypto_drop_skcipher(spawn);
err_free_inst:
	kfree(inst);
	return ERR_PTR(err);
}
Esempio n. 27
0
struct crypto_instance *aead_geniv_alloc(struct crypto_template *tmpl,
					 struct rtattr **tb, u32 type,
					 u32 mask)
{
	const char *name;
	struct crypto_aead_spawn *spawn;
	struct crypto_attr_type *algt;
	struct crypto_instance *inst;
	struct crypto_alg *alg;
	int err;

	algt = crypto_get_attr_type(tb);
	err = PTR_ERR(algt);
	if (IS_ERR(algt))
		return ERR_PTR(err);

	if ((algt->type ^ (CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_GENIV)) &
	    algt->mask)
		return ERR_PTR(-EINVAL);

	name = crypto_attr_alg_name(tb[1]);
	err = PTR_ERR(name);
	if (IS_ERR(name))
		return ERR_PTR(err);

	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
	if (!inst)
		return ERR_PTR(-ENOMEM);

	spawn = crypto_instance_ctx(inst);

	/* Ignore async algorithms if necessary. */
	mask |= crypto_requires_sync(algt->type, algt->mask);

	crypto_set_aead_spawn(spawn, inst);
	err = crypto_grab_nivaead(spawn, name, type, mask);
	if (err)
		goto err_free_inst;

	alg = crypto_aead_spawn_alg(spawn);

	err = -EINVAL;
	if (!alg->cra_aead.ivsize)
		goto err_drop_alg;

	/*
	 * This is only true if we're constructing an algorithm with its
	 * default IV generator.  For the default generator we elide the
	 * template name and double-check the IV generator.
	 */
	if (algt->mask & CRYPTO_ALG_GENIV) {
		if (strcmp(tmpl->name, alg->cra_aead.geniv))
			goto err_drop_alg;

		memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
		memcpy(inst->alg.cra_driver_name, alg->cra_driver_name,
		       CRYPTO_MAX_ALG_NAME);
	} else {
		err = -ENAMETOOLONG;
		if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
			     "%s(%s)", tmpl->name, alg->cra_name) >=
		    CRYPTO_MAX_ALG_NAME)
			goto err_drop_alg;
		if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
			     "%s(%s)", tmpl->name, alg->cra_driver_name) >=
		    CRYPTO_MAX_ALG_NAME)
			goto err_drop_alg;
	}

	inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_GENIV;
	inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC;
	inst->alg.cra_priority = alg->cra_priority;
	inst->alg.cra_blocksize = alg->cra_blocksize;
	inst->alg.cra_alignmask = alg->cra_alignmask;
	inst->alg.cra_type = &crypto_aead_type;

	inst->alg.cra_aead.ivsize = alg->cra_aead.ivsize;
	inst->alg.cra_aead.maxauthsize = alg->cra_aead.maxauthsize;
	inst->alg.cra_aead.geniv = alg->cra_aead.geniv;

	inst->alg.cra_aead.setkey = alg->cra_aead.setkey;
	inst->alg.cra_aead.setauthsize = alg->cra_aead.setauthsize;
	inst->alg.cra_aead.encrypt = alg->cra_aead.encrypt;
	inst->alg.cra_aead.decrypt = alg->cra_aead.decrypt;

out:
	return inst;

err_drop_alg:
	crypto_drop_aead(spawn);
err_free_inst:
	kfree(inst);
	inst = ERR_PTR(err);
	goto out;
}
Esempio n. 28
0
void aead_geniv_free(struct crypto_instance *inst)
{
	crypto_drop_aead(crypto_instance_ctx(inst));
	kfree(inst);
}
Esempio n. 29
0
static void crypto_cbc_free(struct crypto_instance *inst)
{
	crypto_drop_spawn(crypto_instance_ctx(inst));
	kfree(inst);
}
static int async_encrypt(struct ablkcipher_request *req)
{
	struct crypto_tfm *tfm = req->base.tfm;
	struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
	struct blkcipher_desc desc = {
		.tfm = __crypto_blkcipher_cast(tfm),
		.info = req->info,
		.flags = req->base.flags,
	};


	return alg->encrypt(&desc, req->dst, req->src, req->nbytes);
}

static int async_decrypt(struct ablkcipher_request *req)
{
	struct crypto_tfm *tfm = req->base.tfm;
	struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
	struct blkcipher_desc desc = {
		.tfm = __crypto_blkcipher_cast(tfm),
		.info = req->info,
		.flags = req->base.flags,
	};

	return alg->decrypt(&desc, req->dst, req->src, req->nbytes);
}

static unsigned int crypto_blkcipher_ctxsize(struct crypto_alg *alg, u32 type,
					     u32 mask)
{
	struct blkcipher_alg *cipher = &alg->cra_blkcipher;
	unsigned int len = alg->cra_ctxsize;

	if ((mask & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_MASK &&
	    cipher->ivsize) {
		len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
		len += cipher->ivsize;
	}

	return len;
}

static int crypto_init_blkcipher_ops_async(struct crypto_tfm *tfm)
{
	struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher;
	struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;

	crt->setkey = async_setkey;
	crt->encrypt = async_encrypt;
	crt->decrypt = async_decrypt;
	if (!alg->ivsize) {
		crt->givencrypt = skcipher_null_givencrypt;
		crt->givdecrypt = skcipher_null_givdecrypt;
	}
	crt->base = __crypto_ablkcipher_cast(tfm);
	crt->ivsize = alg->ivsize;

	return 0;
}

static int crypto_init_blkcipher_ops_sync(struct crypto_tfm *tfm)
{
	struct blkcipher_tfm *crt = &tfm->crt_blkcipher;
	struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
	unsigned long align = crypto_tfm_alg_alignmask(tfm) + 1;
	unsigned long addr;

	crt->setkey = setkey;
	crt->encrypt = alg->encrypt;
	crt->decrypt = alg->decrypt;

	addr = (unsigned long)crypto_tfm_ctx(tfm);
	addr = ALIGN(addr, align);
	addr += ALIGN(tfm->__crt_alg->cra_ctxsize, align);
	crt->iv = (void *)addr;

	return 0;
}

static int crypto_init_blkcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
{
	struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;

	if (alg->ivsize > PAGE_SIZE / 8)
		return -EINVAL;

	if ((mask & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_MASK)
		return crypto_init_blkcipher_ops_sync(tfm);
	else
		return crypto_init_blkcipher_ops_async(tfm);
}

static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
	__attribute__ ((unused));
static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
{
	seq_printf(m, "type         : blkcipher\n");
	seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
	seq_printf(m, "min keysize  : %u\n", alg->cra_blkcipher.min_keysize);
	seq_printf(m, "max keysize  : %u\n", alg->cra_blkcipher.max_keysize);
	seq_printf(m, "ivsize       : %u\n", alg->cra_blkcipher.ivsize);
	seq_printf(m, "geniv        : %s\n", alg->cra_blkcipher.geniv ?:
					     "<default>");
}

const struct crypto_type crypto_blkcipher_type = {
	.ctxsize = crypto_blkcipher_ctxsize,
	.init = crypto_init_blkcipher_ops,
#ifdef CONFIG_PROC_FS
	.show = crypto_blkcipher_show,
#endif
};
EXPORT_SYMBOL_GPL(crypto_blkcipher_type);

static int crypto_grab_nivcipher(struct crypto_skcipher_spawn *spawn,
				const char *name, u32 type, u32 mask)
{
	struct crypto_alg *alg;
	int err;

	type = crypto_skcipher_type(type);
	mask = crypto_skcipher_mask(mask)| CRYPTO_ALG_GENIV;

	alg = crypto_alg_mod_lookup(name, type, mask);
	if (IS_ERR(alg))
		return PTR_ERR(alg);

	err = crypto_init_spawn(&spawn->base, alg, spawn->base.inst, mask);
	crypto_mod_put(alg);
	return err;
}

struct crypto_instance *skcipher_geniv_alloc(struct crypto_template *tmpl,
					     struct rtattr **tb, u32 type,
					     u32 mask)
{
	struct {
		int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
			      unsigned int keylen);
		int (*encrypt)(struct ablkcipher_request *req);
		int (*decrypt)(struct ablkcipher_request *req);

		unsigned int min_keysize;
		unsigned int max_keysize;
		unsigned int ivsize;

		const char *geniv;
	} balg;
	const char *name;
	struct crypto_skcipher_spawn *spawn;
	struct crypto_attr_type *algt;
	struct crypto_instance *inst;
	struct crypto_alg *alg;
	int err;

	algt = crypto_get_attr_type(tb);
	err = PTR_ERR(algt);
	if (IS_ERR(algt))
		return ERR_PTR(err);

	if ((algt->type ^ (CRYPTO_ALG_TYPE_GIVCIPHER | CRYPTO_ALG_GENIV)) &
	    algt->mask)
		return ERR_PTR(-EINVAL);

	name = crypto_attr_alg_name(tb[1]);
	err = PTR_ERR(name);
	if (IS_ERR(name))
		return ERR_PTR(err);

	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
	if (!inst)
		return ERR_PTR(-ENOMEM);

	spawn = crypto_instance_ctx(inst);

	/* Ignore async algorithms if necessary. */
	mask |= crypto_requires_sync(algt->type, algt->mask);

	crypto_set_skcipher_spawn(spawn, inst);
	err = crypto_grab_nivcipher(spawn, name, type, mask);
	if (err)
		goto err_free_inst;

	alg = crypto_skcipher_spawn_alg(spawn);

	if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
	    CRYPTO_ALG_TYPE_BLKCIPHER) {
		balg.ivsize = alg->cra_blkcipher.ivsize;
		balg.min_keysize = alg->cra_blkcipher.min_keysize;
		balg.max_keysize = alg->cra_blkcipher.max_keysize;

		balg.setkey = async_setkey;
		balg.encrypt = async_encrypt;
		balg.decrypt = async_decrypt;

		balg.geniv = alg->cra_blkcipher.geniv;
	} else {
		balg.ivsize = alg->cra_ablkcipher.ivsize;
		balg.min_keysize = alg->cra_ablkcipher.min_keysize;
		balg.max_keysize = alg->cra_ablkcipher.max_keysize;

		balg.setkey = alg->cra_ablkcipher.setkey;
		balg.encrypt = alg->cra_ablkcipher.encrypt;
		balg.decrypt = alg->cra_ablkcipher.decrypt;

		balg.geniv = alg->cra_ablkcipher.geniv;
	}

	err = -EINVAL;
	if (!balg.ivsize)
		goto err_drop_alg;

	/*
	 * This is only true if we're constructing an algorithm with its
	 * default IV generator.  For the default generator we elide the
	 * template name and double-check the IV generator.
	 */
	if (algt->mask & CRYPTO_ALG_GENIV) {
		if (!balg.geniv)
			balg.geniv = crypto_default_geniv(alg);
		err = -EAGAIN;
		if (strcmp(tmpl->name, balg.geniv))
			goto err_drop_alg;

		memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
		memcpy(inst->alg.cra_driver_name, alg->cra_driver_name,
		       CRYPTO_MAX_ALG_NAME);
	} else {
		err = -ENAMETOOLONG;
		if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
			     "%s(%s)", tmpl->name, alg->cra_name) >=
		    CRYPTO_MAX_ALG_NAME)
			goto err_drop_alg;
		if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
			     "%s(%s)", tmpl->name, alg->cra_driver_name) >=
		    CRYPTO_MAX_ALG_NAME)
			goto err_drop_alg;
	}

	inst->alg.cra_flags = CRYPTO_ALG_TYPE_GIVCIPHER | CRYPTO_ALG_GENIV;
	inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC;
	inst->alg.cra_priority = alg->cra_priority;
	inst->alg.cra_blocksize = alg->cra_blocksize;
	inst->alg.cra_alignmask = alg->cra_alignmask;
	inst->alg.cra_type = &crypto_givcipher_type;

	inst->alg.cra_ablkcipher.ivsize = balg.ivsize;
	inst->alg.cra_ablkcipher.min_keysize = balg.min_keysize;
	inst->alg.cra_ablkcipher.max_keysize = balg.max_keysize;
	inst->alg.cra_ablkcipher.geniv = balg.geniv;

	inst->alg.cra_ablkcipher.setkey = balg.setkey;
	inst->alg.cra_ablkcipher.encrypt = balg.encrypt;
	inst->alg.cra_ablkcipher.decrypt = balg.decrypt;

out:
	return inst;

err_drop_alg:
	crypto_drop_skcipher(spawn);
err_free_inst:
	kfree(inst);
	inst = ERR_PTR(err);
	goto out;
}
EXPORT_SYMBOL_GPL(skcipher_geniv_alloc);

void skcipher_geniv_free(struct crypto_instance *inst)
{
	crypto_drop_skcipher(crypto_instance_ctx(inst));
	kfree(inst);
}