diff --git a/app/src/main/cpp/api.cpp b/app/src/main/cpp/api.cpp
index 6a0717e..c6c3052 100644
--- a/app/src/main/cpp/api.cpp
+++ b/app/src/main/cpp/api.cpp
@@ -142,10 +142,10 @@ Connector::Response Connector::sendICC(int cla, int ins, int p1, int p2, int ne,
         }
         sm->decrypt(DO->value);
         response.data = DO->value;
-        logBytes("decrypted %s", response.data);
         if (isPadded) {
             iso9797_unpad(response.data);
         }
+        logBytes("decrypted %s", response.data);
         response.success = true;
         response.code = (do99->value[0] << 8) | do99->value[1];
     }
@@ -196,11 +196,24 @@ Connector::Response Connector::readBinaryBySFI(int sfi, int offset) {
     return sendICC(ISO7816_CLA::NO_SM, ISO7816_INS::READ_BINARY, sfi, offset, readAheadLength, t);
 }
 
-Connector::Response Connector::readBinaryExt(int offset, int ne) {
-    // make data with TLV 0x54 for offset
-    bytes data;
-    int truncated_offset;
-    return sendICC(ISO7816_CLA::NO_SM, ISO7816_INS::READ_BINARY_EXT, 0, 0, truncated_offset, data);
+Connector::Response Connector::readBinaryExt(size_t offset, size_t ne) {
+    int ne_nbyte = bytecount(ne);
+    int addBytes = 1 + ne_nbyte + (ne > 0x80 ? 1 : 0);
+    if (ne <= 256) {
+        ne = ne + addBytes < 256 ? ne + addBytes : 256;
+    } else {
+        ne = ne + addBytes;
+    }
+
+    bytes data = num2bytes(offset);
+    data.erase(data.begin(), data.end() - bytecount(offset));
+    TLV(0x54, data);
+    return sendICC(ISO7816_CLA::NO_SM, ISO7816_INS::READ_BINARY_EXT, 0, 0, ne, data);
+}
+Connector::Response Connector::readBinaryNormal(size_t offset, size_t toRead) {
+    LOGI("Read normal offset=%d len=%d");
+    bytes t;
+    return sendICC(ISO7816_CLA::NO_SM, ISO7816_INS::READ_BINARY, offset >> 8, offset & 0xff, toRead, t);
 }
 
 bool Connector::selectDf1() {
@@ -314,7 +327,82 @@ void Connector::initBAC() {
     return;
 }
 
+bytes Connector::readFileBySFI(int sfi) {
+    auto seek = readBinaryBySFI(sfi, 0);
+    auto t = TLV(seek.data, false);
+
+    // [TAG | LENGTH | DATA]
+    // LENGTH denotes DATA length
+    // but we seek 8 bytes a head so we must offset with correct length
+    auto length = t.length - (seek.data.size() - t.size);
+    auto rest = readBinary(seek.data.size(), length);
+
+    bytes content;
+    content.insert(content.end(), seek.data.begin(), seek.data.end());
+    content.insert(content.end(), rest.begin(), rest.end());
+    return content;
+}
+
+bytes Connector::readBinary(size_t offset, size_t length) {
+    bytes r;
+    const size_t maxToRead = 256;
+
+    LOGI("INIT READ FILE offset=%d len=%d", offset, length);
+    while (length > 0) {
+        size_t toRead = length > maxToRead ? maxToRead : length;
+        LOGI("READ FILE offset=%d len=%d", offset, toRead);
+        Connector::Response response;
+        if (offset > 0x7fff) {
+            // extended read
+            response = readBinaryExt(offset, toRead);
+        } else {
+            // normal read
+            if (offset + toRead > 0x7fff) {
+                toRead = 0x7fff - offset;
+            }
+            response = readBinaryNormal(offset, toRead);
+        }
+
+        const int s = response.data.size();
+        r.insert(r.end(), response.data.begin(), response.data.end());
+        offset += s;
+        length -= s;
+    }
+    return r;
+}
+
 void Connector::readEFCOM() {
-    auto binary = readBinaryBySFI(EFCOM_SFI, 0);
-    auto decoded = TLV(binary.data);
+    auto content = readFileBySFI(EFCOM_SFI);
+    LOGI("FILE COM size %d", content.size());
+    logBytes("FILE COM %s", content);
+}
+void Connector::readEFDG1() {
+    auto content = readFileBySFI(EFDG1_SFI);
+    LOGI("FILE DG1 size %d", content.size());
+    logBytes("FILE DG1 %s", content);
+}
+void Connector::readEFDG2() {
+    auto content = readFileBySFI(EFDG2_SFI);
+    LOGI("FILE DG2 size %d", content.size());
+    logBytes("FILE DG2 %s", content);
+}
+void Connector::readEFDG13() {
+    auto content = readFileBySFI(EFDG13_SFI);
+    LOGI("FILE DG13 size %d", content.size());
+    logBytes("FILE DG13 %s", content);
+}
+void Connector::readEFDG14() {
+    auto content = readFileBySFI(EFDG14_SFI);
+    LOGI("FILE DG14 size %d", content.size());
+    logBytes("FILE DG14 %s", content);
+}
+void Connector::readEFDG15() {
+    auto content = readFileBySFI(EFDG15_SFI);
+    LOGI("FILE DG15 size %d", content.size());
+    logBytes("FILE DG15 %s", content);
+}
+void Connector::readEFSOD() {
+    auto content = readFileBySFI(EFSOD_SFI);
+    LOGI("FILE SOD size %d", content.size());
+    logBytes("FILE SOD %s", content);
 }
\ No newline at end of file
diff --git a/app/src/main/cpp/api.h b/app/src/main/cpp/api.h
index 6ea229d..a59744a 100644
--- a/app/src/main/cpp/api.h
+++ b/app/src/main/cpp/api.h
@@ -27,7 +27,7 @@ public:
     }
 
     // decode to TLV
-    TLV(bytes data) {
+    TLV(bytes data, bool full = true) {
         size_t offset = 0;
         tag = data[offset++];
         if (tag == 0x1f) {
@@ -43,12 +43,16 @@ public:
             if (length_nbyte > 3) {
                 throw "length too big to decode";
             }
+            length = 0;
             for (size_t i = 0; i < length_nbyte; i++) {
                 length <<= 8;
                 length |= data[offset++];
             }
         }
 
+        size = offset;
+        if (!full) return;
+
         value.insert(value.end(), data.begin() + offset, data.begin() + offset + length);
         size = offset + length;
     }
@@ -72,7 +76,7 @@ public:
         bytes encoded;
         encoded.insert(encoded.end(), tag_encoded.begin(), tag_encoded.end());
         encoded.insert(encoded.end(), len_encoded.begin(), len_encoded.end());
-        encoded.insert(value.end(), value.begin(), value.end());
+        encoded.insert(encoded.end(), value.begin(), value.end());
         return encoded;
     }
 };
@@ -218,9 +222,11 @@ private:
     Connector::Response externalAuthenticate(bytes& eifd, uint64_t mifd);
 
     Connector::Response readBinaryBySFI(int sfi, int offset);
-    Connector::Response readBinaryExt(int offset, int ne);
+    Connector::Response readBinaryExt(size_t offset, size_t ne);
+    Connector::Response readBinaryNormal(size_t offset, size_t ne);
 
-//    setupSecureMessaging();
+    bytes readFileBySFI(int sfi);
+    bytes readBinary(size_t offset, size_t length);
 
 public:
     transceive_type transceive;
@@ -233,6 +239,13 @@ public:
     bool selectDf1();
     void initBAC();
     void readEFCOM();
+    void readEFDG1();
+    void readEFDG2();
+    void readEFDG13();
+    void readEFDG14();
+    void readEFDG15();
+    void readEFSOD();
+
 };
 
 #endif //CCCC_API_H
diff --git a/app/src/main/cpp/consts.h b/app/src/main/cpp/consts.h
index aa8b573..6bb6731 100644
--- a/app/src/main/cpp/consts.h
+++ b/app/src/main/cpp/consts.h
@@ -65,4 +65,14 @@ constexpr int defaultSelectP2          = (ISO97816_SelectFileP2::returnFCP | ISO
 constexpr uint8_t Df1Name[] = {0xA0,0x00,0x00,0x02,0x47,0x10,0x01};
 constexpr uint8_t EFCOM_SFI = 0x1e;
 
+constexpr uint8_t EFDG1_SFI = 0x01;
+constexpr uint8_t EFDG2_SFI = 0x02;
+constexpr uint8_t EFDG13_SFI = 0x0d;
+constexpr uint8_t EFDG14_SFI = 0x0e;
+constexpr uint8_t EFDG15_SFI = 0x0f;
+constexpr uint8_t EFSOD_SFI = 0x1d;
+
+
+
+
 #endif //CCCC_CONSTS_H
diff --git a/app/src/main/cpp/native-lib.cpp b/app/src/main/cpp/native-lib.cpp
index 9f562ed..2d89d39 100644
--- a/app/src/main/cpp/native-lib.cpp
+++ b/app/src/main/cpp/native-lib.cpp
@@ -22,7 +22,14 @@ Java_com_bshield_cccc_MainActivity_initNFCScan(
 
     connector->selectDf1();
     connector->initBAC();
+
     connector->readEFCOM();
+    connector->readEFDG1();
+    connector->readEFDG2();
+    connector->readEFDG13();
+    connector->readEFDG14();
+    connector->readEFDG15();
+    connector->readEFSOD();
     return 1;
 }