crypto/block: introduce qcrypto_block_*crypt_helper functions

Introduce QCryptoBlock-based functions and use them where possible.
This is needed to implement thread-safe encrypt/decrypt operations.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/crypto/block-luks.c b/crypto/block-luks.c
index 353a400595d1417607886713de5a820da6b204e3..e486e7ee942d4344a7991b317ffe9f165dccbb8b 100644 (file)
--- a/crypto/block-luks.c
+++ b/crypto/block-luks.c
@@ -1409,10 +1409,9 @@ qcrypto_block_luks_decrypt(QCryptoBlock *block,
 {
     assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE));
     assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE));
-    return qcrypto_block_cipher_decrypt_helper(block->cipher,
-                                               block->niv, block->ivgen,
-                                               QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
-                                               offset, buf, len, errp);
+    return qcrypto_block_decrypt_helper(block,
+                                        QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
+                                        offset, buf, len, errp);
 }
 
 
@@ -1425,10 +1424,9 @@ qcrypto_block_luks_encrypt(QCryptoBlock *block,
 {
     assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE));
     assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE));
-    return qcrypto_block_cipher_encrypt_helper(block->cipher,
-                                               block->niv, block->ivgen,
-                                               QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
-                                               offset, buf, len, errp);
+    return qcrypto_block_encrypt_helper(block,
+                                        QCRYPTO_BLOCK_LUKS_SECTOR_SIZE,
+                                        offset, buf, len, errp);
 }
 
 

diff --git a/crypto/block-qcow.c b/crypto/block-qcow.c
index 3b6722deb03574b6cb1eeee5aab7c1addfdeb471..36bf5f09b75969c861353ebbd4683e540036cc41 100644 (file)
--- a/crypto/block-qcow.c
+++ b/crypto/block-qcow.c
@@ -152,10 +152,9 @@ qcrypto_block_qcow_decrypt(QCryptoBlock *block,
 {
     assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_QCOW_SECTOR_SIZE));
     assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_QCOW_SECTOR_SIZE));
-    return qcrypto_block_cipher_decrypt_helper(block->cipher,
-                                               block->niv, block->ivgen,
-                                               QCRYPTO_BLOCK_QCOW_SECTOR_SIZE,
-                                               offset, buf, len, errp);
+    return qcrypto_block_decrypt_helper(block,
+                                        QCRYPTO_BLOCK_QCOW_SECTOR_SIZE,
+                                        offset, buf, len, errp);
 }
 
 
@@ -168,10 +167,9 @@ qcrypto_block_qcow_encrypt(QCryptoBlock *block,
 {
     assert(QEMU_IS_ALIGNED(offset, QCRYPTO_BLOCK_QCOW_SECTOR_SIZE));
     assert(QEMU_IS_ALIGNED(len, QCRYPTO_BLOCK_QCOW_SECTOR_SIZE));
-    return qcrypto_block_cipher_encrypt_helper(block->cipher,
-                                               block->niv, block->ivgen,
-                                               QCRYPTO_BLOCK_QCOW_SECTOR_SIZE,
-                                               offset, buf, len, errp);
+    return qcrypto_block_encrypt_helper(block,
+                                        QCRYPTO_BLOCK_QCOW_SECTOR_SIZE,
+                                        offset, buf, len, errp);
 }
 
 

diff --git a/crypto/block.c b/crypto/block.c
index d43139dbc7c270b9de527326db7023c1bad2a526..3fe3de2ef8078cd4dcce0594413465f57a4e38e5 100644 (file)
--- a/crypto/block.c
+++ b/crypto/block.c
@@ -277,3 +277,31 @@ int qcrypto_block_cipher_encrypt_helper(QCryptoCipher *cipher,
                                           offset, buf, len,
                                           qcrypto_cipher_encrypt, errp);
 }
+
+
+int qcrypto_block_decrypt_helper(QCryptoBlock *block,
+                                 int sectorsize,
+                                 uint64_t offset,
+                                 uint8_t *buf,
+                                 size_t len,
+                                 Error **errp)
+{
+    return do_qcrypto_block_cipher_encdec(block->cipher, block->niv,
+                                          block->ivgen,
+                                          sectorsize, offset, buf, len,
+                                          qcrypto_cipher_decrypt, errp);
+}
+
+
+int qcrypto_block_encrypt_helper(QCryptoBlock *block,
+                                 int sectorsize,
+                                 uint64_t offset,
+                                 uint8_t *buf,
+                                 size_t len,
+                                 Error **errp)
+{
+    return do_qcrypto_block_cipher_encdec(block->cipher, block->niv,
+                                          block->ivgen,
+                                          sectorsize, offset, buf, len,
+                                          qcrypto_cipher_encrypt, errp);
+}

diff --git a/crypto/blockpriv.h b/crypto/blockpriv.h
index 54bbe1eb6ae445cf4160e51620cdb48651deae71..438c08bec233e5d519fee2027e89789be0d68b54 100644 (file)
--- a/crypto/blockpriv.h
+++ b/crypto/blockpriv.h
@@ -96,4 +96,18 @@ int qcrypto_block_cipher_encrypt_helper(QCryptoCipher *cipher,
                                         size_t len,
                                         Error **errp);
 
+int qcrypto_block_decrypt_helper(QCryptoBlock *block,
+                                 int sectorsize,
+                                 uint64_t offset,
+                                 uint8_t *buf,
+                                 size_t len,
+                                 Error **errp);
+
+int qcrypto_block_encrypt_helper(QCryptoBlock *block,
+                                 int sectorsize,
+                                 uint64_t offset,
+                                 uint8_t *buf,
+                                 size_t len,
+                                 Error **errp);
+
 #endif /* QCRYPTO_BLOCKPRIV_H */