add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/crypto/adiantum.c
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@@ -32,14 +32,13 @@
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 #include <crypto/b128ops.h>
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 #include <crypto/chacha.h>
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+#include <crypto/internal/cipher.h>
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 #include <crypto/internal/hash.h>
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 #include <crypto/internal/poly1305.h>
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 #include <crypto/internal/skcipher.h>
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 #include <crypto/nhpoly1305.h>
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 #include <crypto/scatterwalk.h>
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 #include <linux/module.h>
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-
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-#include "internal.h"
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 /*
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  * Size of right-hand part of input data, in bytes; also the size of the block
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@@ -64,7 +63,7 @@
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 struct adiantum_instance_ctx {
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 	struct crypto_skcipher_spawn streamcipher_spawn;
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-	struct crypto_spawn blockcipher_spawn;
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+	struct crypto_cipher_spawn blockcipher_spawn;
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 	struct crypto_shash_spawn hash_spawn;
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 };
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@@ -135,9 +134,6 @@
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 				  crypto_skcipher_get_flags(tfm) &
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 				  CRYPTO_TFM_REQ_MASK);
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 	err = crypto_skcipher_setkey(tctx->streamcipher, key, keylen);
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-	crypto_skcipher_set_flags(tfm,
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-				crypto_skcipher_get_flags(tctx->streamcipher) &
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-				CRYPTO_TFM_RES_MASK);
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 	if (err)
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 		return err;
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@@ -167,9 +163,6 @@
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 				CRYPTO_TFM_REQ_MASK);
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 	err = crypto_cipher_setkey(tctx->blockcipher, keyp,
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 				   BLOCKCIPHER_KEY_SIZE);
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-	crypto_skcipher_set_flags(tfm,
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-				  crypto_cipher_get_flags(tctx->blockcipher) &
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-				  CRYPTO_TFM_RES_MASK);
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 	if (err)
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 		goto out;
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 	keyp += BLOCKCIPHER_KEY_SIZE;
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@@ -182,12 +175,10 @@
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 	crypto_shash_set_flags(tctx->hash, crypto_skcipher_get_flags(tfm) &
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 					   CRYPTO_TFM_REQ_MASK);
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 	err = crypto_shash_setkey(tctx->hash, keyp, NHPOLY1305_KEY_SIZE);
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-	crypto_skcipher_set_flags(tfm, crypto_shash_get_flags(tctx->hash) &
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-				       CRYPTO_TFM_RES_MASK);
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 	keyp += NHPOLY1305_KEY_SIZE;
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 	WARN_ON(keyp != &data->derived_keys[ARRAY_SIZE(data->derived_keys)]);
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 out:
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-	kzfree(data);
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+	kfree_sensitive(data);
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 	return err;
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 }
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@@ -266,7 +257,6 @@
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 	int err;
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 	hash_desc->tfm = tctx->hash;
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-	hash_desc->flags = 0;
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 	err = crypto_shash_init(hash_desc);
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 	if (err)
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@@ -437,10 +427,10 @@
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 	BUILD_BUG_ON(offsetofend(struct adiantum_request_ctx, u) !=
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 		     sizeof(struct adiantum_request_ctx));
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-	subreq_size = max(FIELD_SIZEOF(struct adiantum_request_ctx,
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+	subreq_size = max(sizeof_field(struct adiantum_request_ctx,
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 				       u.hash_desc) +
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 			  crypto_shash_descsize(hash),
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-			  FIELD_SIZEOF(struct adiantum_request_ctx,
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+			  sizeof_field(struct adiantum_request_ctx,
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 				       u.streamcipher_req) +
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 			  crypto_skcipher_reqsize(streamcipher));
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@@ -470,7 +460,7 @@
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 	struct adiantum_instance_ctx *ictx = skcipher_instance_ctx(inst);
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 	crypto_drop_skcipher(&ictx->streamcipher_spawn);
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-	crypto_drop_spawn(&ictx->blockcipher_spawn);
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+	crypto_drop_cipher(&ictx->blockcipher_spawn);
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 	crypto_drop_shash(&ictx->hash_spawn);
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 	kfree(inst);
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 }
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@@ -501,38 +491,18 @@
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 static int adiantum_create(struct crypto_template *tmpl, struct rtattr **tb)
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 {
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-	struct crypto_attr_type *algt;
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-	const char *streamcipher_name;
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-	const char *blockcipher_name;
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+	u32 mask;
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 	const char *nhpoly1305_name;
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 	struct skcipher_instance *inst;
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 	struct adiantum_instance_ctx *ictx;
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 	struct skcipher_alg *streamcipher_alg;
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 	struct crypto_alg *blockcipher_alg;
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-	struct crypto_alg *_hash_alg;
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 	struct shash_alg *hash_alg;
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 	int err;
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-	algt = crypto_get_attr_type(tb);
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-	if (IS_ERR(algt))
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-		return PTR_ERR(algt);
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-
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-	if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask)
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-		return -EINVAL;
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-
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-	streamcipher_name = crypto_attr_alg_name(tb[1]);
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-	if (IS_ERR(streamcipher_name))
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-		return PTR_ERR(streamcipher_name);
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-
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-	blockcipher_name = crypto_attr_alg_name(tb[2]);
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-	if (IS_ERR(blockcipher_name))
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-		return PTR_ERR(blockcipher_name);
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-
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-	nhpoly1305_name = crypto_attr_alg_name(tb[3]);
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-	if (nhpoly1305_name == ERR_PTR(-ENOENT))
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-		nhpoly1305_name = "nhpoly1305";
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-	if (IS_ERR(nhpoly1305_name))
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-		return PTR_ERR(nhpoly1305_name);
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+	err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SKCIPHER, &mask);
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+	if (err)
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+		return err;
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 	inst = kzalloc(sizeof(*inst) + sizeof(*ictx), GFP_KERNEL);
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 	if (!inst)
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@@ -540,37 +510,31 @@
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 	ictx = skcipher_instance_ctx(inst);
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 	/* Stream cipher, e.g. "xchacha12" */
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-	crypto_set_skcipher_spawn(&ictx->streamcipher_spawn,
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-				  skcipher_crypto_instance(inst));
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-	err = crypto_grab_skcipher(&ictx->streamcipher_spawn, streamcipher_name,
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-				   0, crypto_requires_sync(algt->type,
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-							   algt->mask));
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+	err = crypto_grab_skcipher(&ictx->streamcipher_spawn,
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+				   skcipher_crypto_instance(inst),
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+				   crypto_attr_alg_name(tb[1]), 0, mask);
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 	if (err)
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-		goto out_free_inst;
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+		goto err_free_inst;
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 	streamcipher_alg = crypto_spawn_skcipher_alg(&ictx->streamcipher_spawn);
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 	/* Block cipher, e.g. "aes" */
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-	crypto_set_spawn(&ictx->blockcipher_spawn,
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-			 skcipher_crypto_instance(inst));
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-	err = crypto_grab_spawn(&ictx->blockcipher_spawn, blockcipher_name,
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-				CRYPTO_ALG_TYPE_CIPHER, CRYPTO_ALG_TYPE_MASK);
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+	err = crypto_grab_cipher(&ictx->blockcipher_spawn,
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+				 skcipher_crypto_instance(inst),
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+				 crypto_attr_alg_name(tb[2]), 0, mask);
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 	if (err)
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-		goto out_drop_streamcipher;
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-	blockcipher_alg = ictx->blockcipher_spawn.alg;
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+		goto err_free_inst;
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+	blockcipher_alg = crypto_spawn_cipher_alg(&ictx->blockcipher_spawn);
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 	/* NHPoly1305 ε-∆U hash function */
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-	_hash_alg = crypto_alg_mod_lookup(nhpoly1305_name,
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-					  CRYPTO_ALG_TYPE_SHASH,
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-					  CRYPTO_ALG_TYPE_MASK);
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-	if (IS_ERR(_hash_alg)) {
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-		err = PTR_ERR(_hash_alg);
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-		goto out_drop_blockcipher;
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-	}
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-	hash_alg = __crypto_shash_alg(_hash_alg);
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-	err = crypto_init_shash_spawn(&ictx->hash_spawn, hash_alg,
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-				      skcipher_crypto_instance(inst));
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+	nhpoly1305_name = crypto_attr_alg_name(tb[3]);
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+	if (nhpoly1305_name == ERR_PTR(-ENOENT))
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+		nhpoly1305_name = "nhpoly1305";
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+	err = crypto_grab_shash(&ictx->hash_spawn,
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+				skcipher_crypto_instance(inst),
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+				nhpoly1305_name, 0, mask);
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 	if (err)
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-		goto out_put_hash;
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+		goto err_free_inst;
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+	hash_alg = crypto_spawn_shash_alg(&ictx->hash_spawn);
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 	/* Check the set of algorithms */
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 	if (!adiantum_supported_algorithms(streamcipher_alg, blockcipher_alg,
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@@ -579,7 +543,7 @@
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 			streamcipher_alg->base.cra_name,
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 			blockcipher_alg->cra_name, hash_alg->base.cra_name);
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 		err = -EINVAL;
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-		goto out_drop_hash;
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+		goto err_free_inst;
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 	}
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 	/* Instance fields */
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@@ -588,16 +552,14 @@
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 	if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
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 		     "adiantum(%s,%s)", streamcipher_alg->base.cra_name,
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 		     blockcipher_alg->cra_name) >= CRYPTO_MAX_ALG_NAME)
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-		goto out_drop_hash;
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+		goto err_free_inst;
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 	if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
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 		     "adiantum(%s,%s,%s)",
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 		     streamcipher_alg->base.cra_driver_name,
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 		     blockcipher_alg->cra_driver_name,
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 		     hash_alg->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
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-		goto out_drop_hash;
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+		goto err_free_inst;
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-	inst->alg.base.cra_flags = streamcipher_alg->base.cra_flags &
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-				   CRYPTO_ALG_ASYNC;
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 	inst->alg.base.cra_blocksize = BLOCKCIPHER_BLOCK_SIZE;
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 	inst->alg.base.cra_ctxsize = sizeof(struct adiantum_tfm_ctx);
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 	inst->alg.base.cra_alignmask = streamcipher_alg->base.cra_alignmask |
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@@ -624,22 +586,10 @@
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 	inst->free = adiantum_free_instance;
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 	err = skcipher_register_instance(tmpl, inst);
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-	if (err)
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-		goto out_drop_hash;
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-
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-	crypto_mod_put(_hash_alg);
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-	return 0;
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-
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-out_drop_hash:
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-	crypto_drop_shash(&ictx->hash_spawn);
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-out_put_hash:
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-	crypto_mod_put(_hash_alg);
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-out_drop_blockcipher:
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-	crypto_drop_spawn(&ictx->blockcipher_spawn);
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-out_drop_streamcipher:
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-	crypto_drop_skcipher(&ictx->streamcipher_spawn);
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-out_free_inst:
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-	kfree(inst);
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+	if (err) {
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+err_free_inst:
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+		adiantum_free_instance(inst);
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+	}
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 	return err;
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 }
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@@ -660,10 +610,11 @@
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 	crypto_unregister_template(&adiantum_tmpl);
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 }
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-module_init(adiantum_module_init);
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+subsys_initcall(adiantum_module_init);
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 module_exit(adiantum_module_exit);
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 MODULE_DESCRIPTION("Adiantum length-preserving encryption mode");
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 MODULE_LICENSE("GPL v2");
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 MODULE_AUTHOR("Eric Biggers <ebiggers@google.com>");
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 MODULE_ALIAS_CRYPTO("adiantum");
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+MODULE_IMPORT_NS(CRYPTO_INTERNAL);