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); err = PTR_ERR(algt); if (IS_ERR(algt)) return ERR_PTR(err); 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); err = PTR_ERR(cipher); if (IS_ERR(cipher)) return ERR_PTR(err); 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; }
static void crypto_ctr_free(struct crypto_instance *inst) { crypto_drop_spawn(crypto_instance_ctx(inst)); kfree(inst); }
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); }
static int crypto_fpu_encrypt(struct blkcipher_desc *desc_in, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { int err; struct crypto_fpu_ctx *ctx = crypto_blkcipher_ctx(desc_in->tfm); struct crypto_blkcipher *child = ctx->child; struct blkcipher_desc desc = { .tfm = child, .info = desc_in->info, .flags = desc_in->flags & ~CRYPTO_TFM_REQ_MAY_SLEEP, }; kernel_fpu_begin(); err = crypto_blkcipher_crt(desc.tfm)->encrypt(&desc, dst, src, nbytes); kernel_fpu_end(); return err; } static int crypto_fpu_decrypt(struct blkcipher_desc *desc_in, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { int err; struct crypto_fpu_ctx *ctx = crypto_blkcipher_ctx(desc_in->tfm); struct crypto_blkcipher *child = ctx->child; struct blkcipher_desc desc = { .tfm = child, .info = desc_in->info, .flags = desc_in->flags & ~CRYPTO_TFM_REQ_MAY_SLEEP, }; kernel_fpu_begin(); err = crypto_blkcipher_crt(desc.tfm)->decrypt(&desc, dst, src, nbytes); kernel_fpu_end(); return err; } static int crypto_fpu_init_tfm(struct crypto_tfm *tfm) { struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); struct crypto_spawn *spawn = crypto_instance_ctx(inst); struct crypto_fpu_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; } static void crypto_fpu_exit_tfm(struct crypto_tfm *tfm) { struct crypto_fpu_ctx *ctx = crypto_tfm_ctx(tfm); crypto_free_blkcipher(ctx->child); } static struct crypto_instance *crypto_fpu_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_BLKCIPHER, CRYPTO_ALG_TYPE_MASK); if (IS_ERR(alg)) return ERR_CAST(alg); inst = crypto_alloc_instance("fpu", alg); if (IS_ERR(inst)) goto out_put_alg; inst->alg.cra_flags = alg->cra_flags; 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 = alg->cra_type; inst->alg.cra_blkcipher.ivsize = alg->cra_blkcipher.ivsize; inst->alg.cra_blkcipher.min_keysize = alg->cra_blkcipher.min_keysize; inst->alg.cra_blkcipher.max_keysize = alg->cra_blkcipher.max_keysize; inst->alg.cra_ctxsize = sizeof(struct crypto_fpu_ctx); inst->alg.cra_init = crypto_fpu_init_tfm; inst->alg.cra_exit = crypto_fpu_exit_tfm; inst->alg.cra_blkcipher.setkey = crypto_fpu_setkey; inst->alg.cra_blkcipher.encrypt = crypto_fpu_encrypt; inst->alg.cra_blkcipher.decrypt = crypto_fpu_decrypt; out_put_alg: crypto_mod_put(alg); return inst; } static void crypto_fpu_free(struct crypto_instance *inst) { crypto_drop_spawn(crypto_instance_ctx(inst)); kfree(inst); }
static int crypt(struct blkcipher_desc *d, struct blkcipher_walk *w, struct priv *ctx, void (*tw)(struct crypto_tfm *, u8 *, const u8 *), void (*fn)(struct crypto_tfm *, u8 *, const u8 *)) { int err; unsigned int avail; const int bs = XTS_BLOCK_SIZE; struct sinfo s = { .tfm = crypto_cipher_tfm(ctx->child), .fn = fn }; u8 *wsrc; u8 *wdst; err = blkcipher_walk_virt(d, w); if (!w->nbytes) return err; s.t = (be128 *)w->iv; avail = w->nbytes; wsrc = w->src.virt.addr; wdst = w->dst.virt.addr; tw(crypto_cipher_tfm(ctx->tweak), w->iv, w->iv); goto first; for (;;) { do { gf128mul_x_ble(s.t, s.t); first: xts_round(&s, wdst, wsrc); wsrc += bs; wdst += bs; } while ((avail -= bs) >= bs); err = blkcipher_walk_done(d, w, avail); if (!w->nbytes) break; avail = w->nbytes; 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->tweak)->cia_encrypt, 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->tweak)->cia_encrypt, crypto_cipher_alg(ctx->child)->cia_decrypt); } int xts_crypt(struct blkcipher_desc *desc, struct scatterlist *sdst, struct scatterlist *ssrc, unsigned int nbytes, struct xts_crypt_req *req) { const unsigned int bsize = XTS_BLOCK_SIZE; const unsigned int max_blks = req->tbuflen / bsize; struct blkcipher_walk walk={}; unsigned int nblocks; be128 *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(nbytes / bsize, max_blks); src = (be128 *)walk.src.virt.addr; dst = (be128 *)walk.dst.virt.addr; req->tweak_fn(req->tweak_ctx, (u8 *)&t_buf[0], walk.iv); i = 0; goto first; for (;;) { do { for (i = 0; i < nblocks; i++) { gf128mul_x_ble(&t_buf[i], t); first: t = &t_buf[i]; be128_xor(dst + i, t, src + i); } req->crypt_fn(req->crypt_ctx, (u8 *)dst, nblocks * bsize); 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); *(be128 *)walk.iv = *t; 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(xts_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) != XTS_BLOCK_SIZE) { *flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN; crypto_free_cipher(cipher); return -EINVAL; } ctx->child = cipher; cipher = crypto_spawn_cipher(spawn); if (IS_ERR(cipher)) { crypto_free_cipher(ctx->child); return PTR_ERR(cipher); } if (crypto_cipher_blocksize(cipher) != XTS_BLOCK_SIZE) { crypto_free_cipher(cipher); crypto_free_cipher(ctx->child); *flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN; return -EINVAL; } ctx->tweak = cipher; return 0; } static void exit_tfm(struct crypto_tfm *tfm) { struct priv *ctx = crypto_tfm_ctx(tfm); crypto_free_cipher(ctx->child); crypto_free_cipher(ctx->tweak); } 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("xts", 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; inst->alg.cra_blkcipher.ivsize = alg->cra_blocksize; inst->alg.cra_blkcipher.min_keysize = 2 * alg->cra_cipher.cia_min_keysize; inst->alg.cra_blkcipher.max_keysize = 2 * alg->cra_cipher.cia_max_keysize; 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); }
static int crypt(struct blkcipher_desc *d, struct blkcipher_walk *w, struct priv *ctx, void (*tw)(struct crypto_tfm *, u8 *, const u8 *), 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 }; u8 *wsrc; u8 *wdst; err = blkcipher_walk_virt(d, w); if (!w->nbytes) return err; s.t = (be128 *)w->iv; avail = w->nbytes; wsrc = w->src.virt.addr; wdst = w->dst.virt.addr; /* calculate first value of T */ tw(crypto_cipher_tfm(ctx->tweak), w->iv, w->iv); goto first; for (;;) { do { gf128mul_x_ble(s.t, s.t); first: xts_round(&s, wdst, wsrc); wsrc += bs; wdst += bs; } while ((avail -= bs) >= bs); err = blkcipher_walk_done(d, w, avail); if (!w->nbytes) break; avail = w->nbytes; 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->tweak)->cia_encrypt, 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->tweak)->cia_encrypt, 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; crypto_free_cipher(cipher); return -EINVAL; } ctx->child = cipher; cipher = crypto_spawn_cipher(spawn); if (IS_ERR(cipher)) { crypto_free_cipher(ctx->child); return PTR_ERR(cipher); } /* this check isn't really needed, leave it here just in case */ if (crypto_cipher_blocksize(cipher) != 16) { crypto_free_cipher(cipher); crypto_free_cipher(ctx->child); *flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN; return -EINVAL; } ctx->tweak = cipher; return 0; } static void exit_tfm(struct crypto_tfm *tfm) { struct priv *ctx = crypto_tfm_ctx(tfm); crypto_free_cipher(ctx->child); crypto_free_cipher(ctx->tweak); } 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_PTR(PTR_ERR(alg)); inst = crypto_alloc_instance("xts", 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; inst->alg.cra_blkcipher.ivsize = alg->cra_blocksize; inst->alg.cra_blkcipher.min_keysize = 2 * alg->cra_cipher.cia_min_keysize; inst->alg.cra_blkcipher.max_keysize = 2 * alg->cra_cipher.cia_max_keysize; 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); }
static int crypto_cbc_create(struct crypto_template *tmpl, struct rtattr **tb) { struct skcipher_instance *inst; struct crypto_attr_type *algt; struct crypto_spawn *spawn; struct crypto_alg *alg; u32 mask; int err; err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SKCIPHER); if (err) return err; inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); if (!inst) return -ENOMEM; algt = crypto_get_attr_type(tb); err = PTR_ERR(algt); if (IS_ERR(algt)) goto err_free_inst; mask = CRYPTO_ALG_TYPE_MASK | crypto_requires_off(algt->type, algt->mask, CRYPTO_ALG_NEED_FALLBACK); alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, mask); err = PTR_ERR(alg); if (IS_ERR(alg)) goto err_free_inst; spawn = skcipher_instance_ctx(inst); err = crypto_init_spawn(spawn, alg, skcipher_crypto_instance(inst), CRYPTO_ALG_TYPE_MASK); crypto_mod_put(alg); if (err) goto err_free_inst; err = crypto_inst_setname(skcipher_crypto_instance(inst), "cbc", alg); if (err) goto err_drop_spawn; err = -EINVAL; if (!is_power_of_2(alg->cra_blocksize)) goto err_drop_spawn; inst->alg.base.cra_priority = alg->cra_priority; inst->alg.base.cra_blocksize = alg->cra_blocksize; inst->alg.base.cra_alignmask = alg->cra_alignmask; inst->alg.ivsize = alg->cra_blocksize; inst->alg.min_keysize = alg->cra_cipher.cia_min_keysize; inst->alg.max_keysize = alg->cra_cipher.cia_max_keysize; inst->alg.base.cra_ctxsize = sizeof(struct crypto_cbc_ctx); inst->alg.init = crypto_cbc_init_tfm; inst->alg.exit = crypto_cbc_exit_tfm; inst->alg.setkey = crypto_cbc_setkey; inst->alg.encrypt = crypto_cbc_encrypt; inst->alg.decrypt = crypto_cbc_decrypt; inst->free = crypto_cbc_free; err = skcipher_register_instance(tmpl, inst); if (err) goto err_drop_spawn; out: return err; err_drop_spawn: crypto_drop_spawn(spawn); err_free_inst: kfree(inst); goto out; }
static int crypto_pcbc_create(struct crypto_template *tmpl, struct rtattr **tb) { struct skcipher_instance *inst; struct crypto_attr_type *algt; struct crypto_spawn *spawn; struct crypto_alg *alg; int err; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) return PTR_ERR(algt); if (((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask) & ~CRYPTO_ALG_INTERNAL) return -EINVAL; inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); if (!inst) return -ENOMEM; alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER | (algt->type & CRYPTO_ALG_INTERNAL), CRYPTO_ALG_TYPE_MASK | (algt->mask & CRYPTO_ALG_INTERNAL)); err = PTR_ERR(alg); if (IS_ERR(alg)) goto err_free_inst; spawn = skcipher_instance_ctx(inst); err = crypto_init_spawn(spawn, alg, skcipher_crypto_instance(inst), CRYPTO_ALG_TYPE_MASK); crypto_mod_put(alg); if (err) goto err_free_inst; err = crypto_inst_setname(skcipher_crypto_instance(inst), "pcbc", alg); if (err) goto err_drop_spawn; inst->alg.base.cra_flags = alg->cra_flags & CRYPTO_ALG_INTERNAL; inst->alg.base.cra_priority = alg->cra_priority; inst->alg.base.cra_blocksize = alg->cra_blocksize; inst->alg.base.cra_alignmask = alg->cra_alignmask; inst->alg.ivsize = alg->cra_blocksize; inst->alg.min_keysize = alg->cra_cipher.cia_min_keysize; inst->alg.max_keysize = alg->cra_cipher.cia_max_keysize; inst->alg.base.cra_ctxsize = sizeof(struct crypto_pcbc_ctx); inst->alg.init = crypto_pcbc_init_tfm; inst->alg.exit = crypto_pcbc_exit_tfm; inst->alg.setkey = crypto_pcbc_setkey; inst->alg.encrypt = crypto_pcbc_encrypt; inst->alg.decrypt = crypto_pcbc_decrypt; inst->free = crypto_pcbc_free; err = skcipher_register_instance(tmpl, inst); if (err) goto err_drop_spawn; out: return err; err_drop_spawn: crypto_drop_spawn(spawn); err_free_inst: kfree(inst); goto out; }