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block: convert qcrypto_block_encrypt|decrypt to take bytes offset

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Instead of sector offset, take the bytes offset when encrypting
or decrypting data.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170927125340.12360-6-berrange@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Daniel P. Berrange 2017-09-27 13:53:39 +01:00 • committed by Max Reitz
parent a73466fbad
commit 4609742a49
9 changed files with 56 additions and 41 deletions
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12
crypto/block-luks.c
View file

@ -1399,29 +1399,33 @@ static void qcrypto_block_luks_cleanup(QCryptoBlock *block)
static int
qcrypto_block_luks_decrypt(QCryptoBlock *block,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp)
{
assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE));
assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE));
return qcrypto_block_decrypt_helper(block->cipher,
block->niv, block->ivgen,
QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
startsector, buf, len, errp);
offset, buf, len, errp);
}
static int
qcrypto_block_luks_encrypt(QCryptoBlock *block,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp)
{
assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE));
assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE));
return qcrypto_block_encrypt_helper(block->cipher,
block->niv, block->ivgen,
QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
startsector, buf, len, errp);
offset, buf, len, errp);
}

12
crypto/block-qcow.c
View file

@ -143,29 +143,33 @@ qcrypto_block_qcow_cleanup(QCryptoBlock *block)
static int
qcrypto_block_qcow_decrypt(QCryptoBlock *block,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp)
{
assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_QCOW_SECTOR_SIZE));
assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_QCOW_SECTOR_SIZE));
return qcrypto_block_decrypt_helper(block->cipher,
block->niv, block->ivgen,
QCRYPTO_BLOCK_QCOW_SECTOR_SIZE,
startsector, buf, len, errp);
offset, buf, len, errp);
}
static int
qcrypto_block_qcow_encrypt(QCryptoBlock *block,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp)
{
assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_QCOW_SECTOR_SIZE));
assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_QCOW_SECTOR_SIZE));
return qcrypto_block_encrypt_helper(block->cipher,
block->niv, block->ivgen,
QCRYPTO_BLOCK_QCOW_SECTOR_SIZE,
startsector, buf, len, errp);
offset, buf, len, errp);
}

20
crypto/block.c
View file

@ -127,22 +127,22 @@ QCryptoBlockInfo *qcrypto_block_get_info(QCryptoBlock *block,
int qcrypto_block_decrypt(QCryptoBlock *block,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp)
{
return block->driver->decrypt(block, startsector, buf, len, errp);
return block->driver->decrypt(block, offset, buf, len, errp);
}
int qcrypto_block_encrypt(QCryptoBlock *block,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp)
{
return block->driver->encrypt(block, startsector, buf, len, errp);
return block->driver->encrypt(block, offset, buf, len, errp);
}
@ -194,13 +194,17 @@ int qcrypto_block_decrypt_helper(QCryptoCipher *cipher,
size_t niv,
QCryptoIVGen *ivgen,
int sectorsize,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp)
{
uint8_t *iv;
int ret = -1;
uint64_t startsector = offset / sectorsize;
assert(QEMU_IS_ALIGNED(offset, sectorsize));
assert(QEMU_IS_ALIGNED(len, sectorsize));
iv = niv ? g_new0(uint8_t, niv) : NULL;
@ -243,13 +247,17 @@ int qcrypto_block_encrypt_helper(QCryptoCipher *cipher,
size_t niv,
QCryptoIVGen *ivgen,
int sectorsize,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp)
{
uint8_t *iv;
int ret = -1;
uint64_t startsector = offset / sectorsize;
assert(QEMU_IS_ALIGNED(offset, sectorsize));
assert(QEMU_IS_ALIGNED(len, sectorsize));
iv = niv ? g_new0(uint8_t, niv) : NULL;

4
crypto/blockpriv.h
View file

@ -82,7 +82,7 @@ int qcrypto_block_decrypt_helper(QCryptoCipher *cipher,
size_t niv,
QCryptoIVGen *ivgen,
int sectorsize,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp);
@ -91,7 +91,7 @@ int qcrypto_block_encrypt_helper(QCryptoCipher *cipher,
size_t niv,
QCryptoIVGen *ivgen,
int sectorsize,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp);