From 9163d30c3c62598e4177d57e0fc088e74def1c66 Mon Sep 17 00:00:00 2001
From: dec05eba <0xdec05eba@gmail.com>
Date: Tue, 15 May 2018 20:39:12 +0200
Subject: Allow storing user without nodes

---
 include/odhtdb/DataView.hpp        |  1 +
 include/odhtdb/Database.hpp        |  5 +++++
 include/odhtdb/DatabaseStorage.hpp | 15 +++++++++++++++
 3 files changed, 21 insertions(+)

(limited to 'include')

diff --git a/include/odhtdb/DataView.hpp b/include/odhtdb/DataView.hpp
index 0ecf9fb..2f22d83 100644
--- a/include/odhtdb/DataView.hpp
+++ b/include/odhtdb/DataView.hpp
@@ -12,6 +12,7 @@ namespace odhtdb
         DataView() : data(nullptr), size(0) {}
         DataView(void *_data, usize _size) : data(_data), size(_size) {}
         bool operator == (const DataView &other) const;
+        bool operator != (const DataView &other) const;
 
         void *data;
         usize size;
diff --git a/include/odhtdb/Database.hpp b/include/odhtdb/Database.hpp
index 43c1ad9..ca9369f 100644
--- a/include/odhtdb/Database.hpp
+++ b/include/odhtdb/Database.hpp
@@ -176,6 +176,11 @@ namespace odhtdb
         
         ntp::NtpTimestamp getSyncedTimestampUtc() const;
         
+        bool doesStoredUserExist(const std::string &username) const;
+        
+        // Throws SqlExecException if user with same name already exists
+        void storeUserWithoutNodes(const std::string &username, const std::string &password);
+        
         // Username has to be either unique or if it's the same as existing one, then password has to match.
         // Node has to be unique for the user.
         // Throws DatabaseStorageWrongPassword or SqlExecException on failure (if username is not unique in node).
diff --git a/include/odhtdb/DatabaseStorage.hpp b/include/odhtdb/DatabaseStorage.hpp
index 613f2e8..f03bd9e 100644
--- a/include/odhtdb/DatabaseStorage.hpp
+++ b/include/odhtdb/DatabaseStorage.hpp
@@ -58,6 +58,12 @@ namespace odhtdb
         DatabaseStorageWrongPassword(const std::string &errMsg) : DatabaseStorageException(errMsg) {}
     };
     
+    class DatabaseStorageNoSuchStoredUser : public DatabaseStorageException
+    {
+    public:
+        DatabaseStorageNoSuchStoredUser(const std::string &errMsg) : DatabaseStorageException(errMsg) {}
+    };
+    
     const int PASSWORD_SALT_LEN = 16;
     const int HASHED_PASSWORD_LEN = 32;
     
@@ -111,6 +117,11 @@ namespace odhtdb
         // Throws DatabaseStorageNotFound if user doesn't exist in node
         u64 getUserActionCounter(const Hash &nodeHash, const Signature::PublicKey &userPublicKey) const;
         
+        bool doesStoredUserExist(const std::string &username) const;
+        
+        // Throws SqlExecException if user with same name already exists
+        void storeUserWithoutNodes(const std::string &username, const std::string &password);
+        
         // Username has to be either unique or if it's the same as existing one, then password has to match.
         // Node has to be unique for the user.
         // Throws DatabaseStorageWrongPassword or SqlExecException on failure (if username is not unique in node).
@@ -118,6 +129,7 @@ namespace odhtdb
         
         // Returns nodes, public key and private key of encrypted user.
         // Throws DatabaseStorageWrongPassword if password for the stored user is wrong.
+        // Throws DatabaseStorageNoSuchStoredUser if user doesn't exist.
         std::vector<NodeUserKeyPair> getStoredUserNodeDataDecrypted(const std::string &username, const std::string &password);
         
         // Returns true and node decryption key if node exists and we have the decryption key, 
@@ -148,6 +160,9 @@ namespace odhtdb
         
         void setNodeAddDataDecrypted(i64 rowId);
         void setNodeAddDataDecryptedData(i64 rowId, const DataView &decryptedData);
+        
+        // Throws DatabaseStorageNoSuchStoredUser or DatabaseStorageWrongPassword
+        i64 getStoredUserId(const std::string &username, const DataView &hashedPassword);
     private:
         Database *database;
         sqlite3 *sqliteDb;
-- 
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