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block: pass option prefix down to crypto layer 

While the crypto layer uses a fixed option name "key-secret",
the upper block layer may have a prefix on the options. e.g.
"encrypt.key-secret", in order to avoid clashes between crypto
option names & other block option names. To ensure the crypto
layer can report accurate error messages, we must tell it what
option name prefix was used.

Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170623162419.26068-19-berrange@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Daniel P. Berrange 2017-06-23 17:24:17 +01:00 committed by Max Reitz
parent c01c214b69
commit 1cd9a787a2
9 changed files with 37 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
block/crypto.c
View File

@ -296,7 +296,7 @@ static int block_crypto_open_generic(QCryptoBlockFormat format,
if (flags & BDRV_O_NO_IO) {
cflags |= QCRYPTO_BLOCK_OPEN_NO_IO;
}
crypto->block = qcrypto_block_open(open_opts,
crypto->block = qcrypto_block_open(open_opts, NULL,
block_crypto_read_func,
bs,
cflags,
@ -340,7 +340,7 @@ static int block_crypto_create_generic(QCryptoBlockFormat format,
return -1;
}
crypto = qcrypto_block_create(create_opts,
crypto = qcrypto_block_create(create_opts, NULL,
block_crypto_init_func,
block_crypto_write_func,
&data,

7
block/qcow.c
View File

@ -208,8 +208,8 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
if (flags & BDRV_O_NO_IO) {
cflags |= QCRYPTO_BLOCK_OPEN_NO_IO;
}
s->crypto = qcrypto_block_open(crypto_opts, NULL, NULL,
cflags, errp);
s->crypto = qcrypto_block_open(crypto_opts, "encrypt.",
NULL, NULL, cflags, errp);
if (!s->crypto) {
ret = -EINVAL;
goto fail;
@ -866,7 +866,8 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
goto exit;
}
crypto = qcrypto_block_create(crypto_opts, NULL, NULL, NULL, errp);
crypto = qcrypto_block_create(crypto_opts, "encrypt.",
NULL, NULL, NULL, errp);
if (!crypto) {
ret = -EINVAL;
goto exit;

8
block/qcow2.c
View File

@ -279,7 +279,7 @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset,
if (flags & BDRV_O_NO_IO) {
cflags |= QCRYPTO_BLOCK_OPEN_NO_IO;
}
s->crypto = qcrypto_block_open(s->crypto_opts,
s->crypto = qcrypto_block_open(s->crypto_opts, "encrypt.",
qcow2_crypto_hdr_read_func,
bs, cflags, errp);
if (!s->crypto) {
@ -1313,8 +1313,8 @@ static int qcow2_do_open(BlockDriverState *bs, QDict *options, int flags,
if (flags & BDRV_O_NO_IO) {
cflags |= QCRYPTO_BLOCK_OPEN_NO_IO;
}
s->crypto = qcrypto_block_open(s->crypto_opts, NULL, NULL,
cflags, errp);
s->crypto = qcrypto_block_open(s->crypto_opts, "encrypt.",
NULL, NULL, cflags, errp);
if (!s->crypto) {
ret = -EINVAL;
goto fail;
@ -2318,7 +2318,7 @@ static int qcow2_set_up_encryption(BlockDriverState *bs, const char *encryptfmt,
}
s->crypt_method_header = fmt;
crypto = qcrypto_block_create(cryptoopts,
crypto = qcrypto_block_create(cryptoopts, "encrypt.",
qcow2_crypto_hdr_init_func,
qcow2_crypto_hdr_write_func,
bs, errp);

8
crypto/block-luks.c
View File

@ -638,6 +638,7 @@ qcrypto_block_luks_find_key(QCryptoBlock *block,
static int
qcrypto_block_luks_open(QCryptoBlock *block,
QCryptoBlockOpenOptions *options,
const char *optprefix,
QCryptoBlockReadFunc readfunc,
void *opaque,
unsigned int flags,
@ -661,7 +662,8 @@ qcrypto_block_luks_open(QCryptoBlock *block,
if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) {
if (!options->u.luks.key_secret) {
error_setg(errp, "Parameter 'key-secret' is required for cipher");
error_setg(errp, "Parameter '%skey-secret' is required for cipher",
optprefix ? optprefix : "");
return -1;
}
password = qcrypto_secret_lookup_as_utf8(
@ -885,6 +887,7 @@ qcrypto_block_luks_uuid_gen(uint8_t *uuidstr)
static int
qcrypto_block_luks_create(QCryptoBlock *block,
QCryptoBlockCreateOptions *options,
const char *optprefix,
QCryptoBlockInitFunc initfunc,
QCryptoBlockWriteFunc writefunc,
void *opaque,
@ -937,7 +940,8 @@ qcrypto_block_luks_create(QCryptoBlock *block,
* be silently ignored, for compatibility with dm-crypt */
if (!options->u.luks.key_secret) {
error_setg(errp, "Parameter 'key-secret' is required for cipher");
error_setg(errp, "Parameter '%skey-secret' is required for cipher",
optprefix ? optprefix : "");
return -1;
}
password = qcrypto_secret_lookup_as_utf8(luks_opts.key_secret, errp);

8
crypto/block-qcow.c
View File

@ -94,6 +94,7 @@ qcrypto_block_qcow_init(QCryptoBlock *block,
static int
qcrypto_block_qcow_open(QCryptoBlock *block,
QCryptoBlockOpenOptions *options,
const char *optprefix,
QCryptoBlockReadFunc readfunc G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED,
unsigned int flags,
@ -104,7 +105,8 @@ qcrypto_block_qcow_open(QCryptoBlock *block,
} else {
if (!options->u.qcow.key_secret) {
error_setg(errp,
"Parameter 'key-secret' is required for cipher");
"Parameter '%skey-secret' is required for cipher",
optprefix ? optprefix : "");
return -1;
}
return qcrypto_block_qcow_init(block,
@ -116,13 +118,15 @@ qcrypto_block_qcow_open(QCryptoBlock *block,
static int
qcrypto_block_qcow_create(QCryptoBlock *block,
QCryptoBlockCreateOptions *options,
const char *optprefix,
QCryptoBlockInitFunc initfunc G_GNUC_UNUSED,
QCryptoBlockWriteFunc writefunc G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED,
Error **errp)
{
if (!options->u.qcow.key_secret) {
error_setg(errp, "Parameter 'key-secret' is required for cipher");
error_setg(errp, "Parameter '%skey-secret' is required for cipher",
optprefix ? optprefix : "");
return -1;
}
/* QCow2 has no special header, since everything is hardwired */

6
crypto/block.c
View File

@ -48,6 +48,7 @@ bool qcrypto_block_has_format(QCryptoBlockFormat format,
QCryptoBlock *qcrypto_block_open(QCryptoBlockOpenOptions *options,
const char *optprefix,
QCryptoBlockReadFunc readfunc,
void *opaque,
unsigned int flags,
@ -67,7 +68,7 @@ QCryptoBlock *qcrypto_block_open(QCryptoBlockOpenOptions *options,
block->driver = qcrypto_block_drivers[options->format];
if (block->driver->open(block, options,
if (block->driver->open(block, options, optprefix,
readfunc, opaque, flags, errp) < 0) {
g_free(block);
return NULL;
@ -78,6 +79,7 @@ QCryptoBlock *qcrypto_block_open(QCryptoBlockOpenOptions *options,
QCryptoBlock *qcrypto_block_create(QCryptoBlockCreateOptions *options,
const char *optprefix,
QCryptoBlockInitFunc initfunc,
QCryptoBlockWriteFunc writefunc,
void *opaque,
@ -97,7 +99,7 @@ QCryptoBlock *qcrypto_block_create(QCryptoBlockCreateOptions *options,
block->driver = qcrypto_block_drivers[options->format];
if (block->driver->create(block, options, initfunc,
if (block->driver->create(block, options, optprefix, initfunc,
writefunc, opaque, errp) < 0) {
g_free(block);
return NULL;

2
crypto/blockpriv.h
View File

@ -41,6 +41,7 @@ struct QCryptoBlock {
struct QCryptoBlockDriver {
int (*open)(QCryptoBlock *block,
QCryptoBlockOpenOptions *options,
const char *optprefix,
QCryptoBlockReadFunc readfunc,
void *opaque,
unsigned int flags,
@ -48,6 +49,7 @@ struct QCryptoBlockDriver {
int (*create)(QCryptoBlock *block,
QCryptoBlockCreateOptions *options,
const char *optprefix,
QCryptoBlockInitFunc initfunc,
QCryptoBlockWriteFunc writefunc,
void *opaque,

6
include/crypto/block.h
View File

@ -71,6 +71,7 @@ typedef enum {
/**
* qcrypto_block_open:
* @options: the encryption options
* @optprefix: name prefix for options
* @readfunc: callback for reading data from the volume
* @opaque: data to pass to @readfunc
* @flags: bitmask of QCryptoBlockOpenFlags values
@ -102,6 +103,7 @@ typedef enum {
* Returns: a block encryption format, or NULL on error
*/
QCryptoBlock *qcrypto_block_open(QCryptoBlockOpenOptions *options,
const char *optprefix,
QCryptoBlockReadFunc readfunc,
void *opaque,
unsigned int flags,
@ -109,7 +111,8 @@ QCryptoBlock *qcrypto_block_open(QCryptoBlockOpenOptions *options,
/**
* qcrypto_block_create:
* @format: the encryption format
* @options: the encryption options
* @optprefix: name prefix for options
* @initfunc: callback for initializing volume header
* @writefunc: callback for writing data to the volume header
* @opaque: data to pass to @initfunc and @writefunc
@ -133,6 +136,7 @@ QCryptoBlock *qcrypto_block_open(QCryptoBlockOpenOptions *options,
* Returns: a block encryption format, or NULL on error
*/
QCryptoBlock *qcrypto_block_create(QCryptoBlockCreateOptions *options,
const char *optprefix,
QCryptoBlockInitFunc initfunc,
QCryptoBlockWriteFunc writefunc,
void *opaque,

8
tests/test-crypto-block.c
View File

@ -281,7 +281,7 @@ static void test_block(gconstpointer opaque)
memset(&header, 0, sizeof(header));
buffer_init(&header, "header");
blk = qcrypto_block_create(data->create_opts,
blk = qcrypto_block_create(data->create_opts, NULL,
test_block_init_func,
test_block_write_func,
&header,
@ -300,7 +300,7 @@ static void test_block(gconstpointer opaque)
object_unparent(sec);
/* Ensure we can't open without the secret */
blk = qcrypto_block_open(data->open_opts,
blk = qcrypto_block_open(data->open_opts, NULL,
test_block_read_func,
&header,
0,
@ -308,7 +308,7 @@ static void test_block(gconstpointer opaque)
g_assert(blk == NULL);
/* Ensure we can't open without the secret, unless NO_IO */
blk = qcrypto_block_open(data->open_opts,
blk = qcrypto_block_open(data->open_opts, NULL,
test_block_read_func,
&header,
QCRYPTO_BLOCK_OPEN_NO_IO,
@ -322,7 +322,7 @@ static void test_block(gconstpointer opaque)
/* Now open for real with secret */
sec = test_block_secret();
blk = qcrypto_block_open(data->open_opts,
blk = qcrypto_block_open(data->open_opts, NULL,
test_block_read_func,
&header,
0,