Added non-private query api (to be used for adding/modifying/deleting database elements

src/CMakeFiles/sealpir.dir/CXX.includecache

@@ -20,10 +20,6 @@ string
 vector
 -
 
-/home/andrew/Documents/Research/AC-PIR/SealPIR/src/pir_client.cpp
-pir_client.hpp
-/home/andrew/Documents/Research/AC-PIR/SealPIR/src/pir_client.hpp
-
 /home/andrew/Documents/Research/AC-PIR/SealPIR/src/pir_client.hpp
 pir.hpp
 /home/andrew/Documents/Research/AC-PIR/SealPIR/src/pir.hpp

src/pir_client.cpp

@@ -275,3 +275,10 @@ Ciphertext PIRClient::compose_to_ciphertext(vector<Plaintext> plains) {
 
     return result;
 }
+
+Ciphertext PIRClient::get_one(){
+    Plaintext pt("1");
+    Ciphertext ct;
+    encryptor_->encrypt(pt, ct);
+    return ct;
+}

src/pir_client.hpp

@@ -31,6 +31,9 @@ class PIRClient {
     uint64_t get_fv_index(uint64_t element_index);
     uint64_t get_fv_offset(uint64_t element_index);
 
+    // Only used for simple_query
+    seal::Ciphertext get_one();
+
 
   private:
     seal::EncryptionParameters enc_params_;

src/pir_server.cpp

@@ -461,3 +461,17 @@ vector<Plaintext> PIRServer::decompose_to_plaintexts(const Ciphertext &encrypted
 
     return result;
 }
+
+Ciphertext PIRServer::simple_query(uint64_t index){
+    //There is no transform_from_ntt that takes a plaintext
+    Ciphertext ct;
+    Plaintext pt = db_->operator[](index);
+    evaluator_->multiply_plain(one_, pt, ct);
+    evaluator_->transform_from_ntt_inplace(ct);
+    return ct;
+}
+
+void PIRServer::set_one_ct(Ciphertext one){
+    one_ = one;
+    evaluator_->transform_to_ntt_inplace(one_);
+}

src/pir_server.hpp

@@ -24,10 +24,12 @@ class PIRServer {
     // Serializes the reply into the provided stream and returns the number of bytes written
     int serialize_reply(PirReply &reply, std::stringstream &stream);
 
-    seal::Plaintext simple_query(std::uint64_t index, std::uint64_t offset);
-
     void set_galois_key(std::uint32_t client_id, seal::GaloisKeys galkey);
 
+    seal::Ciphertext simple_query(std::uint64_t index);
+    //This is only used for simple_query
+    void set_one_ct(seal::Ciphertext one);
+
   private:
     seal::EncryptionParameters enc_params_; // SEAL parameters
     PirParams pir_params_;              // PIR parameters
@@ -38,6 +40,9 @@ class PIRServer {
     std::unique_ptr<seal::BatchEncoder> encoder_;
     std::shared_ptr<seal::SEALContext> context_;
 
+    //This is only uesd for simple_query
+    seal::Ciphertext one_;
+
     void decompose_to_plaintexts_ptr(const seal::Ciphertext &encrypted, seal::Plaintext *plain_ptr, int logt);
     std::vector<seal::Plaintext> decompose_to_plaintexts(const seal::Ciphertext &encrypted);
     void multiply_power_of_X(const seal::Ciphertext &encrypted, seal::Ciphertext &destination,

test/CMakeFiles/progress.marks

@@ -1 +1 @@
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+# Generated by "Unix Makefiles" Generator, CMake Version 3.16
+
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+CXX_FLAGS =   -pthread -std=gnu++17
+
+CXX_DEFINES = 
+
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+

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@@ -0,0 +1 @@
+/usr/bin/c++     CMakeFiles/simple_query_test.dir/simple_query_test.cpp.o  -o ../bin/simple_query_test  ../src/libsealpir.a /usr/local/lib/libseal-3.6.a -pthread 

test/CMakeFiles/simple_query_test.dir/progress.make

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+

test/CMakeLists.txt

@@ -7,3 +7,7 @@ add_test(NAME expand_test COMMAND expand_test)
 add_executable(query_test query_test.cpp)
 target_link_libraries(query_test sealpir)
 add_test(NAME query_test COMMAND query_test)
+
+add_executable(simple_query_test simple_query_test.cpp)
+target_link_libraries(simple_query_test sealpir)
+add_test(NAME simple_query_test COMMAND simple_query_test)

test/CTestTestfile.cmake

@@ -8,3 +8,5 @@ add_test(expand_test "/home/andrew/Documents/Research/AC-PIR/SealPIR/bin/expand_
 set_tests_properties(expand_test PROPERTIES  _BACKTRACE_TRIPLES "/home/andrew/Documents/Research/AC-PIR/SealPIR/test/CMakeLists.txt;5;add_test;/home/andrew/Documents/Research/AC-PIR/SealPIR/test/CMakeLists.txt;0;")
 add_test(query_test "/home/andrew/Documents/Research/AC-PIR/SealPIR/bin/query_test")
 set_tests_properties(query_test PROPERTIES  _BACKTRACE_TRIPLES "/home/andrew/Documents/Research/AC-PIR/SealPIR/test/CMakeLists.txt;9;add_test;/home/andrew/Documents/Research/AC-PIR/SealPIR/test/CMakeLists.txt;0;")
+add_test(simple_query_test "/home/andrew/Documents/Research/AC-PIR/SealPIR/bin/simple_query_test")
+set_tests_properties(simple_query_test PROPERTIES  _BACKTRACE_TRIPLES "/home/andrew/Documents/Research/AC-PIR/SealPIR/test/CMakeLists.txt;13;add_test;/home/andrew/Documents/Research/AC-PIR/SealPIR/test/CMakeLists.txt;0;")

test/Makefile

@@ -56,17 +56,6 @@ CMAKE_BINARY_DIR = /home/andrew/Documents/Research/AC-PIR/SealPIR
 #=============================================================================
 # Targets provided globally by CMake.
 
-# Special rule for the target rebuild_cache
-rebuild_cache:
-	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Running CMake to regenerate build system..."
-	/usr/bin/cmake -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)
-.PHONY : rebuild_cache
-
-# Special rule for the target rebuild_cache
-rebuild_cache/fast: rebuild_cache
-
-.PHONY : rebuild_cache/fast
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 # Special rule for the target edit_cache
 edit_cache:
 	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "No interactive CMake dialog available..."
@@ -89,6 +78,17 @@ test/fast: test
 
 .PHONY : test/fast
 
+# Special rule for the target rebuild_cache
+rebuild_cache:
+	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Running CMake to regenerate build system..."
+	/usr/bin/cmake -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)
+.PHONY : rebuild_cache
+
+# Special rule for the target rebuild_cache
+rebuild_cache/fast: rebuild_cache
+
+.PHONY : rebuild_cache/fast
+
 # The main all target
 all: cmake_check_build_system
 	cd /home/andrew/Documents/Research/AC-PIR/SealPIR && $(CMAKE_COMMAND) -E cmake_progress_start /home/andrew/Documents/Research/AC-PIR/SealPIR/CMakeFiles /home/andrew/Documents/Research/AC-PIR/SealPIR/test/CMakeFiles/progress.marks
@@ -121,6 +121,21 @@ depend:
 	cd /home/andrew/Documents/Research/AC-PIR/SealPIR && $(CMAKE_COMMAND) -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 1
 .PHONY : depend
 
+# Convenience name for target.
+test/CMakeFiles/simple_query_test.dir/rule:
+	cd /home/andrew/Documents/Research/AC-PIR/SealPIR && $(MAKE) -f CMakeFiles/Makefile2 test/CMakeFiles/simple_query_test.dir/rule
+.PHONY : test/CMakeFiles/simple_query_test.dir/rule
+
+# Convenience name for target.
+simple_query_test: test/CMakeFiles/simple_query_test.dir/rule
+
+.PHONY : simple_query_test
+
+# fast build rule for target.
+simple_query_test/fast:
+	cd /home/andrew/Documents/Research/AC-PIR/SealPIR && $(MAKE) -f test/CMakeFiles/simple_query_test.dir/build.make test/CMakeFiles/simple_query_test.dir/build
+.PHONY : simple_query_test/fast
+
 # Convenience name for target.
 test/CMakeFiles/query_test.dir/rule:
 	cd /home/andrew/Documents/Research/AC-PIR/SealPIR && $(MAKE) -f CMakeFiles/Makefile2 test/CMakeFiles/query_test.dir/rule
@@ -205,15 +220,43 @@ query_test.cpp.s:
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 .PHONY : query_test.cpp.s
 
+simple_query_test.o: simple_query_test.cpp.o
+
+.PHONY : simple_query_test.o
+
+# target to build an object file
+simple_query_test.cpp.o:
+	cd /home/andrew/Documents/Research/AC-PIR/SealPIR && $(MAKE) -f test/CMakeFiles/simple_query_test.dir/build.make test/CMakeFiles/simple_query_test.dir/simple_query_test.cpp.o
+.PHONY : simple_query_test.cpp.o
+
+simple_query_test.i: simple_query_test.cpp.i
+
+.PHONY : simple_query_test.i
+
+# target to preprocess a source file
+simple_query_test.cpp.i:
+	cd /home/andrew/Documents/Research/AC-PIR/SealPIR && $(MAKE) -f test/CMakeFiles/simple_query_test.dir/build.make test/CMakeFiles/simple_query_test.dir/simple_query_test.cpp.i
+.PHONY : simple_query_test.cpp.i
+
+simple_query_test.s: simple_query_test.cpp.s
+
+.PHONY : simple_query_test.s
+
+# target to generate assembly for a file
+simple_query_test.cpp.s:
+	cd /home/andrew/Documents/Research/AC-PIR/SealPIR && $(MAKE) -f test/CMakeFiles/simple_query_test.dir/build.make test/CMakeFiles/simple_query_test.dir/simple_query_test.cpp.s
+.PHONY : simple_query_test.cpp.s
+
 # Help Target
 help:
 	@echo "The following are some of the valid targets for this Makefile:"
 	@echo "... all (the default if no target is provided)"
 	@echo "... clean"
 	@echo "... depend"
-	@echo "... rebuild_cache"
 	@echo "... edit_cache"
 	@echo "... test"
+	@echo "... rebuild_cache"
+	@echo "... simple_query_test"
 	@echo "... query_test"
 	@echo "... expand_test"
 	@echo "... expand_test.o"
@@ -222,6 +265,9 @@ help:
 	@echo "... query_test.o"
 	@echo "... query_test.i"
 	@echo "... query_test.s"
+	@echo "... simple_query_test.o"
+	@echo "... simple_query_test.i"
+	@echo "... simple_query_test.s"
 .PHONY : help
 
 

test/simple_query_test.cpp

@@ -0,0 +1,136 @@
+#include "pir.hpp"
+#include "pir_client.hpp"
+#include "pir_server.hpp"
+#include <seal/seal.h>
+#include <chrono>
+#include <memory>
+#include <random>
+#include <cstdint>
+#include <cstddef>
+
+using namespace std::chrono;
+using namespace std;
+using namespace seal;
+
+int simple_query_test(uint64_t num_items, uint64_t item_size, uint32_t degree, uint32_t lt, uint32_t dim);
+
+int main(int argc, char *argv[]) {
+    // Quick check
+    assert(simple_query_test(1 << 10, 288, 4096, 20, 1) == 0);
+
+    // Forces ciphertext expansion to be the same as the degree
+    assert(simple_query_test(1 << 20, 288, 4096, 20, 1) == 0);
+
+    
+    assert(simple_query_test(1 << 20, 288, 4096, 20, 2) == 0);
+}
+
+
+int simple_query_test(uint64_t num_items, uint64_t item_size, uint32_t degree, uint32_t lt, uint32_t dim){
+    uint64_t number_of_items = num_items;
+    uint64_t size_per_item = item_size; // in bytes
+    uint32_t N = degree;
+
+    // Recommended values: (logt, d) = (12, 2) or (8, 1). 
+    uint32_t logt = lt; 
+    uint32_t d = dim;
+
+    EncryptionParameters enc_params(scheme_type::bfv);
+    PirParams pir_params;
+
+    // Generates all parameters
+    
+    cout << "Main: Generating SEAL parameters" << endl;
+    gen_encryption_params(N, logt, enc_params);
+    
+    cout << "Main: Verifying SEAL parameters" << endl;
+    verify_encryption_params(enc_params);
+    cout << "Main: SEAL parameters are good" << endl;
+
+    cout << "Main: Generating PIR parameters" << endl;
+    gen_pir_params(number_of_items, size_per_item, d, enc_params, pir_params);
+    
+    
+    
+    //gen_params(number_of_items, size_per_item, N, logt, d, enc_params, pir_params);
+    print_pir_params(pir_params);
+
+    cout << "Main: Initializing the database (this may take some time) ..." << endl;
+
+    // Create test database
+    auto db(make_unique<uint8_t[]>(number_of_items * size_per_item));
+
+    // Copy of the database. We use this at the end to make sure we retrieved
+    // the correct element.
+    auto db_copy(make_unique<uint8_t[]>(number_of_items * size_per_item));
+
+    random_device rd;
+    for (uint64_t i = 0; i < number_of_items; i++) {
+        for (uint64_t j = 0; j < size_per_item; j++) {
+            uint8_t val = rd() % 256;
+            db.get()[(i * size_per_item) + j] = val;
+            db_copy.get()[(i * size_per_item) + j] = val;
+        }
+    }
+
+    // Initialize PIR Server
+    cout << "Main: Initializing server and client" << endl;
+    PIRServer server(enc_params, pir_params);
+
+    // Initialize PIR client....
+    PIRClient client(enc_params, pir_params);
+    Ciphertext one_ct = client.get_one();
+    
+    // Measure database setup
+    auto time_pre_s = high_resolution_clock::now();
+    server.set_database(move(db), number_of_items, size_per_item);
+    server.preprocess_database();
+    server.set_one_ct(one_ct);
+    cout << "Main: database pre processed " << endl;
+    auto time_pre_e = high_resolution_clock::now();
+    auto time_pre_us = duration_cast<microseconds>(time_pre_e - time_pre_s).count();
+
+
+    // Choose an index of an element in the DB
+    uint64_t ele_index = rd() % number_of_items; // element in DB at random position
+    uint64_t index = client.get_fv_index(ele_index);   // index of FV plaintext
+    uint64_t offset = client.get_fv_offset(ele_index); // offset in FV plaintext
+    cout << "Main: element index = " << ele_index << " from [0, " << number_of_items -1 << "]" << endl;
+    cout << "Main: FV index = " << index << ", FV offset = " << offset << endl; 
+
+    // Measure query processing (including expansion)
+    auto time_server_s = high_resolution_clock::now();
+    Ciphertext reply = server.simple_query(index);
+    auto time_server_e = high_resolution_clock::now();
+    auto time_server_us = duration_cast<microseconds>(time_server_e - time_server_s).count();
+
+    // Measure response extraction
+    auto time_decode_s = chrono::high_resolution_clock::now();
+    vector<uint8_t> elems = client.extract_bytes(client.decrypt(reply), offset);
+    auto time_decode_e = chrono::high_resolution_clock::now();
+    auto time_decode_us = duration_cast<microseconds>(time_decode_e - time_decode_s).count();
+
+    assert(elems.size() == size_per_item);
+
+    bool failed = false;
+    // Check that we retrieved the correct element
+    for (uint32_t i = 0; i < size_per_item; i++) {
+        if (elems[i] != db_copy.get()[(ele_index * size_per_item) + i]) {
+            cout << "Main: elems " << (int)elems[i] << ", db "
+                << (int) db_copy.get()[(ele_index * size_per_item) + i] << endl;
+            cout << "Main: PIR result wrong at " << i <<  endl;
+            failed = true;
+        }
+    }
+    if(failed){
+        return -1;
+    }
+
+    // Output results
+    cout << "Main: PIR result correct!" << endl;
+    cout << "Main: PIRServer pre-processing time: " << time_pre_us / 1000 << " ms" << endl;
+    cout << "Main: PIRServer reply generation time: " << time_server_us / 1000 << " ms" << endl;
+    cout << "Main: PIRClient answer decode time: " << time_decode_us / 1000 << " ms" << endl;
+
+    return 0;
+}