linux-imx
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committed 31d40c20983x
static int null_digest(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out){ return 0;}static int null_hash_setkey(struct crypto_shash *tfm, const u8 *key, unsigned int keylen){ return 0; }static int null_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen){ return 0; }static int null_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen){ return 0; }static void null_crypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src){ memcpy(dst, src, NULL_BLOCK_SIZE);}static int skcipher_null_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes)static int null_skcipher_crypt(struct skcipher_request *req){ struct blkcipher_walk walk; struct skcipher_walk walk; int err; blkcipher_walk_init(&walk, dst, src, nbytes); err = blkcipher_walk_virt(desc, &walk); err = skcipher_walk_virt(&walk, req, false); while (walk.nbytes) { if (walk.src.virt.addr != walk.dst.virt.addr) memcpy(walk.dst.virt.addr, walk.src.virt.addr, walk.nbytes); err = blkcipher_walk_done(desc, &walk, 0); err = skcipher_walk_done(&walk, 0); } return err;}static struct shash_alg digest_null = { .digestsize = NULL_DIGEST_SIZE, .setkey = null_hash_setkey, .init = null_init, .update = null_update, .finup = null_digest, .digest = null_digest, .final = null_final, .base = { .cra_name = "digest_null", .cra_blocksize = NULL_BLOCK_SIZE, .cra_module = THIS_MODULE, }};static struct crypto_alg null_algs[3] = { {static struct skcipher_alg skcipher_null = { .base.cra_name = "ecb(cipher_null)", .base.cra_driver_name = "ecb-cipher_null", .base.cra_priority = 100, .base.cra_blocksize = NULL_BLOCK_SIZE, .base.cra_ctxsize = 0, .base.cra_module = THIS_MODULE, .min_keysize = NULL_KEY_SIZE, .max_keysize = NULL_KEY_SIZE, .ivsize = NULL_IV_SIZE, .setkey = null_skcipher_setkey, .encrypt = null_skcipher_crypt, .decrypt = null_skcipher_crypt,};static struct crypto_alg null_algs[] = { { .cra_name = "cipher_null", .cra_flags = CRYPTO_ALG_TYPE_CIPHER, .cra_blocksize = NULL_BLOCK_SIZE, .cra_ctxsize = 0, .cra_module = THIS_MODULE, .cra_u = { .cipher = { .cia_min_keysize = NULL_KEY_SIZE, .cia_max_keysize = NULL_KEY_SIZE, .cia_setkey = null_setkey, .cia_encrypt = null_crypt, .cia_decrypt = null_crypt } }}, { .cra_name = "ecb(cipher_null)", .cra_driver_name = "ecb-cipher_null", .cra_priority = 100, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, .cra_blocksize = NULL_BLOCK_SIZE, .cra_type = &crypto_blkcipher_type, .cra_ctxsize = 0, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = NULL_KEY_SIZE, .max_keysize = NULL_KEY_SIZE, .ivsize = NULL_IV_SIZE, .setkey = null_setkey, .encrypt = skcipher_null_crypt, .decrypt = skcipher_null_crypt } }}, { .cra_name = "compress_null", .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, .cra_blocksize = NULL_BLOCK_SIZE, .cra_ctxsize = 0, .cra_module = THIS_MODULE, .cra_u = { .compress = { .coa_compress = null_compress, .coa_decompress = null_compress } }} }; int ret = 0; ret = crypto_register_algs(null_algs, ARRAY_SIZE(null_algs)); if (ret < 0) goto out; ret = crypto_register_shash(&digest_null); if (ret < 0) goto out_unregister_algs; ret = crypto_register_skcipher(&skcipher_null); if (ret < 0) goto out_unregister_shash; return 0;out_unregister_shash: crypto_unregister_shash(&digest_null);out_unregister_algs: crypto_unregister_algs(null_algs, ARRAY_SIZE(null_algs));out: return ret;}static void __exit crypto_null_mod_fini(void){ crypto_unregister_shash(&digest_null); crypto_unregister_algs(null_algs, ARRAY_SIZE(null_algs)); crypto_unregister_shash(&digest_null); crypto_unregister_skcipher(&skcipher_null);}module_init(crypto_null_mod_init);module_exit(crypto_null_mod_fini);MODULE_LICENSE("GPL");MODULE_DESCRIPTION("Null Cryptographic Algorithms");