fix problem with concurrent writes + implement website queries

  There was a problem with concurrent writes not being visible
until after restart, due to how cached prepared statements work
with SQLite (see comment in `database.cc`).

1 files changed, 18 insertions, 1 deletions

diff --git a/src/sha256.cc b/src/sha256.cc
index 1070c6b..9e2bb23 100644
--- a/src/sha256.cc
+++ b/src/sha256.cc
@@ -144,7 +144,24 @@ bool TestPassword(const uint8 *Auth, int AuthSize, const char *Password){
 	for(int i = 0; i < 32; i += 1){
 		Result |= Digest[i] ^ Hash[i];
 	}
-	return Result == 0;;
+	return Result == 0;
+}
+
+bool GenerateAuth(const char *Password, uint8 *Auth, int AuthSize){
+	if(AuthSize != 64){
+		LOG_ERR("Expected 64 bytes buffer for authentication data (got %d)", AuthSize);
+		return false;
+	}
+
+	uint8 *Hash = &Auth[ 0];
+	uint8 *Salt = &Auth[32];
+	CryptoRandom(Salt, 32);
+	SHA256((const uint8*)Password, (int)strlen(Password), Hash);
+	for(int i = 0; i < 32; i += 1){
+		Hash[i] ^= Salt[i];
+	}
+	SHA256(Hash, 32, Hash);
+	return true;
 }
 
 // CheckSHA256