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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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14
include/crypto/block.h
View file

@ -161,18 +161,19 @@ QCryptoBlockInfo *qcrypto_block_get_info(QCryptoBlock *block,
/**
* @qcrypto_block_decrypt:
* @block: the block encryption object
* @startsector: the sector from which @buf was read
* @offset: the position at which @iov was read
* @buf: the buffer to decrypt
* @len: the length of @buf in bytes
* @errp: pointer to a NULL-initialized error object
*
* Decrypt @len bytes of cipher text in @buf, writing
* plain text back into @buf
* plain text back into @buf. @len and @offset must be
* a multiple of the encryption format sector size.
*
* Returns 0 on success, -1 on failure
*/
int qcrypto_block_decrypt(QCryptoBlock *block,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp);
@ -180,18 +181,19 @@ int qcrypto_block_decrypt(QCryptoBlock *block,
/**
* @qcrypto_block_encrypt:
* @block: the block encryption object
* @startsector: the sector to which @buf will be written
* @offset: the position at which @iov will be written
* @buf: the buffer to decrypt
* @len: the length of @buf in bytes
* @errp: pointer to a NULL-initialized error object
*
* Encrypt @len bytes of plain text in @buf, writing
* cipher text back into @buf
* cipher text back into @buf. @len and @offset must be
* a multiple of the encryption format sector size.
*
* Returns 0 on success, -1 on failure
*/
int qcrypto_block_encrypt(QCryptoBlock *block,
uint64_t startsector,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp);