Merge git+ssh://c09-44.sysnet.ucsd.edu/scratch/bluesky

[bluesky.git] / bluesky / bluesky-private.h

diff --git a/bluesky/bluesky-private.h b/bluesky/bluesky-private.h
index dd55729..dfcb7c5 100644 (file)
--- a/bluesky/bluesky-private.h
+++ b/bluesky/bluesky-private.h
@@ -58,6 +58,31 @@ void bluesky_serialize_cloudlog(BlueSkyCloudLog *log,
                                 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 {
@@ -223,6 +248,7 @@ struct cloudlog_header {
 
 #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. */