From: Maxim Levitsky <mlevitsk@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Kevin Wolf" <kwolf@redhat.com>,
"Daniel P. Berrangé" <berrange@redhat.com>,
qemu-block@nongnu.org, "John Snow" <jsnow@redhat.com>,
"Markus Armbruster" <armbru@redhat.com>,
"Max Reitz" <mreitz@redhat.com>,
"Maxim Levitsky" <mlevitsk@redhat.com>
Subject: [PATCH v2 03/13] qcrypto-luks: don't overwrite cipher_mode in header
Date: Thu, 26 Sep 2019 00:35:17 +0300 [thread overview]
Message-ID: <20190925213527.9117-4-mlevitsk@redhat.com> (raw)
In-Reply-To: <20190925213527.9117-1-mlevitsk@redhat.com>
This way we can store the header we loaded, which
will be used in key management code
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
---
crypto/block-luks.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/crypto/block-luks.c b/crypto/block-luks.c
index f12fa2d270..25f8a9f1c4 100644
--- a/crypto/block-luks.c
+++ b/crypto/block-luks.c
@@ -645,6 +645,7 @@ qcrypto_block_luks_open(QCryptoBlock *block,
QCryptoHashAlgorithm hash;
QCryptoHashAlgorithm ivhash;
g_autofree char *password = NULL;
+ g_autofree char *cipher_mode = NULL;
if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) {
if (!options->u.luks.key_secret) {
@@ -701,6 +702,8 @@ qcrypto_block_luks_open(QCryptoBlock *block,
goto fail;
}
+ cipher_mode = g_strdup(luks->header.cipher_mode);
+
/*
* The cipher_mode header contains a string that we have
* to further parse, of the format
@@ -709,11 +712,11 @@ qcrypto_block_luks_open(QCryptoBlock *block,
*
* eg cbc-essiv:sha256, cbc-plain64
*/
- ivgen_name = strchr(luks->header.cipher_mode, '-');
+ ivgen_name = strchr(cipher_mode, '-');
if (!ivgen_name) {
ret = -EINVAL;
error_setg(errp, "Unexpected cipher mode string format %s",
- luks->header.cipher_mode);
+ cipher_mode);
goto fail;
}
*ivgen_name = '\0';
@@ -735,7 +738,7 @@ qcrypto_block_luks_open(QCryptoBlock *block,
}
}
- ciphermode = qcrypto_block_luks_cipher_mode_lookup(luks->header.cipher_mode,
+ ciphermode = qcrypto_block_luks_cipher_mode_lookup(cipher_mode,
&local_err);
if (local_err) {
ret = -ENOTSUP;
--
2.17.2
next prev parent reply other threads:[~2019-09-25 21:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-25 21:35 [PATCH v2 00/13] crypto/luks: preparation for encryption key managment Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 01/13] block-crypto: misc refactoring Maxim Levitsky
2019-09-27 10:15 ` Daniel P. Berrangé
2019-09-27 16:00 ` Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 02/13] qcrypto-luks: rename some fields in QCryptoBlockLUKSHeader Maxim Levitsky
2019-09-25 21:35 ` Maxim Levitsky [this message]
2019-09-25 21:35 ` [PATCH v2 04/13] qcrypto-luks: simplify masterkey and masterkey length Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 05/13] qcrypto-luks: pass keyslot index rather that pointer to the keyslot Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 06/13] qcrypto-luks: use the parsed encryption settings in QCryptoBlockLUKS Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 07/13] qcrypto-luks: purge unused error codes from open callback Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 08/13] qcrypto-luks: extract store and load header Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 09/13] qcrypto-luks: extract check and parse header Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 10/13] qcrypto-luks: extract store key function Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 11/13] qcrypto-luks: simplify the math used for keyslot locations Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 12/13] qcrypto-luks: more rigorous header checking Maxim Levitsky
2019-09-25 21:35 ` [PATCH v2 13/13] LUKS: better error message when creating too large files Maxim Levitsky
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