commit 4609742a495d98ac358098e10d91890185dcdc60
author Daniel P. Berrange <berrange@redhat.com> Wed Sep 27 13:53:39 2017 +0100
committer Max Reitz <mreitz@redhat.com> Fri Oct 06 16:30:47 2017 +0200
tree 4d689f08dade543ad85c73609b9d75b78ad54fdd
parent a73466fbad6d48ba356940474cd72da602373304

block: convert qcrypto_block_encrypt|decrypt to take bytes offset

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>

crypto/block.c

diff --git a/crypto/block.c b/crypto/block.c
index a7a9ad2..f206d5e 100644
--- a/crypto/block.c
+++ b/crypto/block.c
@@ -127,22 +127,22 @@
 
 
 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 @@
                                  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 @@
                                  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;