GString *authenticated,
GString *writable);
+/* Cryptographic operations. */
+#define CRYPTO_BLOCK_SIZE 16 /* 128-bit AES */
+#define CRYPTO_KEY_SIZE 16
+#define CRYPTO_HASH_SIZE 32 /* SHA-256 */
+
+typedef struct BlueSkyCryptKeys {
+ uint8_t encryption_key[CRYPTO_KEY_SIZE];
+ uint8_t authentication_key[CRYPTO_HASH_SIZE];
+} BlueSkyCryptKeys;
+
+void bluesky_crypt_init();
+void bluesky_crypt_hash_key(const char *keystr, uint8_t *out);
+void bluesky_crypt_random_bytes(guchar *buf, gint len);
+void bluesky_crypt_derive_keys(BlueSkyCryptKeys *keys, const gchar *master);
+BlueSkyRCStr *bluesky_crypt_encrypt(BlueSkyRCStr *in, const uint8_t *key);
+BlueSkyRCStr *bluesky_crypt_decrypt(BlueSkyRCStr *in, const uint8_t *key);
+
+void bluesky_crypt_block_encrypt(gchar *cloud_block, size_t len,
+ BlueSkyCryptKeys *keys);
+gboolean bluesky_crypt_block_decrypt(gchar *cloud_block, size_t len,
+ BlueSkyCryptKeys *keys);
+void bluesky_cloudlog_encrypt(GString *segment, BlueSkyCryptKeys *keys);
+void bluesky_cloudlog_decrypt(char *segment, size_t len,
+ BlueSkyCryptKeys *keys);
+
/* Storage layer. Requests can be performed asynchronously, so these objects
* help keep track of operations in progress. */
typedef enum {
#define JOURNAL_MAGIC "\nLog"
#define CLOUDLOG_MAGIC "AgI-"
+#define CLOUDLOG_MAGIC_ENCRYPTED "AgI=" // CLOUDLOG_MAGIC[3] ^= 0x10
/* A record which tracks an object which has been written to a local log,
* cached, locally, and/or written to the cloud. */
#define CLOUDLOG_JOURNAL 0x01
#define CLOUDLOG_CLOUD 0x02
#define CLOUDLOG_CACHE 0x04
+#define CLOUDLOG_UNCOMMITTED 0x10
struct _BlueSkyCloudLog {
gint refcount;
GMutex *lock;