From: Vitaly Chikunov <vt@altlinux.org>
To: Herbert Xu <herbert@gondor.apana.org.au>,
David Howells <dhowells@redhat.com>,
Mimi Zohar <zohar@linux.ibm.com>,
Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
linux-integrity@vger.kernel.org, keyrings@vger.kernel.org,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Denis Kenzior <denkenz@gmail.com>
Subject: [PATCH v9 04/10] KEYS: do not kmemdup digest in {public,tpm}_key_verify_signature
Date: Thu, 11 Apr 2019 18:51:16 +0300 [thread overview]
Message-ID: <20190411155122.13245-5-vt@altlinux.org> (raw)
In-Reply-To: <20190411155122.13245-1-vt@altlinux.org>
Treat (struct public_key_signature)'s digest same as its signature (s).
Since digest should be already in the kmalloc'd memory do not kmemdup
digest value before calling {public,tpm}_key_verify_signature.
Patch is split from the previous as suggested by Herbert Xu.
Suggested-by: David Howells <dhowells@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: keyrings@vger.kernel.org
Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
---
crypto/asymmetric_keys/asym_tpm.c | 10 +---------
crypto/asymmetric_keys/public_key.c | 9 +--------
2 files changed, 2 insertions(+), 17 deletions(-)
diff --git a/crypto/asymmetric_keys/asym_tpm.c b/crypto/asymmetric_keys/asym_tpm.c
index 4e5b6fb57a94..402fc34ca044 100644
--- a/crypto/asymmetric_keys/asym_tpm.c
+++ b/crypto/asymmetric_keys/asym_tpm.c
@@ -748,7 +748,6 @@ static int tpm_key_verify_signature(const struct key *key,
char alg_name[CRYPTO_MAX_ALG_NAME];
uint8_t der_pub_key[PUB_KEY_BUF_SIZE];
uint32_t der_pub_key_len;
- void *digest;
int ret;
pr_devel("==>%s()\n", __func__);
@@ -780,14 +779,9 @@ static int tpm_key_verify_signature(const struct key *key,
if (!req)
goto error_free_tfm;
- ret = -ENOMEM;
- digest = kmemdup(sig->digest, sig->digest_size, GFP_KERNEL);
- if (!digest)
- goto error_free_req;
-
sg_init_table(src_sg, 2);
sg_set_buf(&src_sg[0], sig->s, sig->s_size);
- sg_set_buf(&src_sg[1], digest, sig->digest_size);
+ sg_set_buf(&src_sg[1], sig->digest, sig->digest_size);
akcipher_request_set_crypt(req, src_sg, NULL, sig->s_size,
sig->digest_size);
crypto_init_wait(&cwait);
@@ -796,8 +790,6 @@ static int tpm_key_verify_signature(const struct key *key,
crypto_req_done, &cwait);
ret = crypto_wait_req(crypto_akcipher_verify(req), &cwait);
- kfree(digest);
-error_free_req:
akcipher_request_free(req);
error_free_tfm:
crypto_free_akcipher(tfm);
diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 0c069fe8a59c..33093b7bcc47 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -229,7 +229,6 @@ int public_key_verify_signature(const struct public_key *pkey,
struct akcipher_request *req;
struct scatterlist src_sg[2];
char alg_name[CRYPTO_MAX_ALG_NAME];
- void *digest;
int ret;
pr_devel("==>%s()\n", __func__);
@@ -262,14 +261,9 @@ int public_key_verify_signature(const struct public_key *pkey,
if (ret)
goto error_free_req;
- ret = -ENOMEM;
- digest = kmemdup(sig->digest, sig->digest_size, GFP_KERNEL);
- if (!digest)
- goto error_free_req;
-
sg_init_table(src_sg, 2);
sg_set_buf(&src_sg[0], sig->s, sig->s_size);
- sg_set_buf(&src_sg[1], digest, sig->digest_size);
+ sg_set_buf(&src_sg[1], sig->digest, sig->digest_size);
akcipher_request_set_crypt(req, src_sg, NULL, sig->s_size,
sig->digest_size);
crypto_init_wait(&cwait);
@@ -278,7 +272,6 @@ int public_key_verify_signature(const struct public_key *pkey,
crypto_req_done, &cwait);
ret = crypto_wait_req(crypto_akcipher_verify(req), &cwait);
- kfree(digest);
error_free_req:
akcipher_request_free(req);
error_free_tfm:
--
2.11.0
next prev parent reply other threads:[~2019-04-11 15:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-11 15:51 [PATCH v9 00/10] crypto: add EC-RDSA (GOST 34.10) algorithm Vitaly Chikunov
2019-04-11 15:51 ` [PATCH v9 01/10] crypto: akcipher - default implementations for request callbacks Vitaly Chikunov
2019-04-11 15:51 ` [PATCH v9 02/10] crypto: rsa - unimplement sign/verify for raw RSA backends Vitaly Chikunov
2019-04-11 15:51 ` [PATCH v9 03/10] crypto: akcipher - new verify API for public key algorithms Vitaly Chikunov
2019-04-11 15:51 ` Vitaly Chikunov [this message]
2019-04-11 15:51 ` [PATCH v9 05/10] X.509: parse public key parameters from x509 for akcipher Vitaly Chikunov
2019-04-11 17:18 ` Denis Kenzior
2019-04-11 15:51 ` [PATCH v9 06/10] crypto: Kconfig - create Public-key cryptography section Vitaly Chikunov
2019-04-11 15:51 ` [PATCH v9 07/10] crypto: ecc - make ecc into separate module Vitaly Chikunov
2019-04-11 15:51 ` [PATCH v9 08/10] crypto: ecrdsa - add EC-RDSA (GOST 34.10) algorithm Vitaly Chikunov
2019-04-11 15:51 ` [PATCH v9 09/10] crypto: ecrdsa - add EC-RDSA test vectors to testmgr Vitaly Chikunov
2019-04-11 15:51 ` [PATCH v9 10/10] integrity: support EC-RDSA signatures for asymmetric_verify Vitaly Chikunov
2019-04-18 14:25 ` [PATCH v9 00/10] crypto: add EC-RDSA (GOST 34.10) algorithm Herbert Xu
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