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-rw-r--r--include/crypto/block.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/crypto/block.h b/include/crypto/block.h
index d49d2c2da9..c77ccaf9c0 100644
--- a/include/crypto/block.h
+++ b/include/crypto/block.h
@@ -146,6 +146,26 @@ QCryptoBlock *qcrypto_block_create(QCryptoBlockCreateOptions *options,
/**
+ * qcrypto_block_calculate_payload_offset:
+ * @create_opts: the encryption options
+ * @optprefix: name prefix for options
+ * @len: output for number of header bytes before payload
+ * @errp: pointer to a NULL-initialized error object
+ *
+ * Calculate the number of header bytes before the payload in an encrypted
+ * storage volume. The header is an area before the payload that is reserved
+ * for encryption metadata.
+ *
+ * Returns: true on success, false on error
+ */
+bool
+qcrypto_block_calculate_payload_offset(QCryptoBlockCreateOptions *create_opts,
+ const char *optprefix,
+ size_t *len,
+ Error **errp);
+
+
+/**
* qcrypto_block_get_info:
* @block: the block encryption object
* @errp: pointer to a NULL-initialized error object
@@ -269,5 +289,7 @@ uint64_t qcrypto_block_get_sector_size(QCryptoBlock *block);
void qcrypto_block_free(QCryptoBlock *block);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(QCryptoBlock, qcrypto_block_free)
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(QCryptoBlockCreateOptions,
+ qapi_free_QCryptoBlockCreateOptions)
#endif /* QCRYPTO_BLOCK_H */