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# SIM Toolkit Examples
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# SIM Toolkit Examples
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Various example Java SIM Toolkit applications. You typically install them using
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the tools from the <http://git.osmocom.org/sim/sim-tools/> repository.
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This repository contains example Java SIM Toolkit applications.
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Build requirements
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------------------
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### Install ANT:
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ANT is required to control the build process. It can be installed via APT
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(debian)
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```
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$ sudo apt install ant
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```
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### Download a suitable JDK:
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For compatibility reasons it is recommended to download a specific JDK and use
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it to compile the javacard applets. The code in this repository has been tested
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with the following JDK variants:
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Oracle Java SE Development Kit 11.0.24
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<https://www.oracle.com/de/java/technologies/javase/jdk11-archive-downloads.html>
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OpenJDK 11.0.2 (build 11.0.2+9)
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<https://jdk.java.net/archive/>
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The easiest method to install the JDK is to download the tar.gz version and to
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unpack it to a suitable location and to let the environment variable `JAVA_HOME`
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point to that location.
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### Download JAVA-card SDKs:
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There is a curated github repository that contains a good selection of JAVA-card
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SDKs: <https://github.com/martinpaljak/oracle_javacard_sdks.git>
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Use the following commandline to download the Javacard SDKs into the (empty)
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directory oracle_javacard_sdks:
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```
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$ git submodule update --init --recursive
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```
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Building CAP files
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------------------
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The build process is started by running `ant`. The environment variable
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`JAVA_HOME` must point to the location of the JDK.
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ANT will also automatically download another required component called
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"ant-javacard.jar". See <https://github.com/martinpaljak/ant-javacard> for
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more information.
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```
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$ JAVA_HOME=/home/user/bin/jdk/oracle/jdk-11.0.24/ ant
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Buildfile: /home/user/work/simcard_applet_loading/hello-stk_osmo/build.xml
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dist:
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[get] Destination already exists (skipping): /home/user/work/simcard_applet_loading/hello-stk_osmo/ant-javacard.jar
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[cap] INFO: using JavaCard 3.0.5 SDK in /home/user/work/simcard_applet_loading/hello-stk_osmo/oracle_javacard_sdks/jc305u3_kit with JDK 11
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[cap] INFO: targeting JavaCard 2.2.1 SDK in /home/user/work/simcard_applet_loading/hello-stk_osmo/oracle_javacard_sdks/jc221_kit
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[cap] INFO: Setting package name to org.toorcamp.HelloSTK
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[cap] Building CAP with 1 applet from package org.toorcamp.HelloSTK (AID: D07002CA44)
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[cap] org.toorcamp.HelloSTK.HelloSTK D07002CA44900101
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[compile] Compiling files from /home/user/work/simcard_applet_loading/hello-stk_osmo/hello-stk
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[compile] Compiling 1 source file to /home/user/work/simcard_applet_loading/hello-stk_osmo/build/classes
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/hello-stk/src/org/toorcamp/HelloSTK/HelloSTK.java
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[verify] Verification passed
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[cap] CAP saved to /home/user/work/simcard_applet_loading/hello-stk_osmo/build/HelloSTK.cap
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[cap] INFO: using JavaCard 3.0.5 SDK in /home/user/work/simcard_applet_loading/hello-stk_osmo/oracle_java
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[cap] INFO: targeting JavaCard 2.2.1 SDK in /home/user/work/simcard_applet_loading/hello-stk_osmo/oracle_
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[cap] INFO: Setting package name to org.osmocom.IMSIChange
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[cap] Building CAP with 1 applet from package org.osmocom.IMSIChange (AID: D07002CA44)
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[cap] org.osmocom.IMSIChange.IMSIChange D07002CA44900102
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[compile] Compiling files from /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change
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[compile] Compiling 3 source files to /home/user/work/simcard_applet_loading/hello-stk_osmo/build/classes
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/Bytes.
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/Mobile
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
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[compile] proHdlr.appendTLV((byte)(TAG_DEFAULT_TEXT), (byte)4, prefillVal, (short)0,
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[compile] ^
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
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[compile] gsmFile.select((short) SIMView.FID_DF_GSM);
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[compile] ^
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
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[compile] gsmFile.select((short) SIMView.FID_EF_IMSI);
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[compile] ^
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
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[compile] gsmFile.select((short) SIMView.FID_DF_GSM);
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[compile] ^
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
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[compile] gsmFile.select((short) SIMView.FID_EF_IMSI);
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[compile] ^
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
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[compile] proHdlr.init((byte)PRO_CMD_REFRESH, SIM_REFRESH_SIM_INIT_FULL_FILE_CHANGE, DEV_ID_ME);
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[compile] ^
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[compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/Mobile
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[compile] byte nibble = bcd[(byte)nibble_i >> 1];
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[compile] ^
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[compile] 7 warnings
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[verify] Verification passed
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[cap] CAP saved to /home/user/work/simcard_applet_loading/hello-stk_osmo/build/ImsiChange.cap
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BUILD SUCCESSFUL
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Total time: 2 seconds
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```
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In case a different JDK has to be chosen it is important to check if the JDK is
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compatible with the JAVA-card SDK. Not all combinations will yield usable
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results.
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A table with compatible JDK / JAVA-card SDK combinations can be found here:
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<https://github.com/martinpaljak/ant-javacard/wiki/JavaCard-SDK-and-JDK-version-compatibility>
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Loading CAP files
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-----------------
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To load CAP files onto sysmoUSIM/sysmoISIM cards, pySim-shell can be used:
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https://downloads.osmocom.org/docs/pysim/master/html/cap-tutorial.html
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Alternatively it is also possible to use the tools from <https://javacard.pro/globalplatform/>,
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for more information see: <https://osmocom.org/projects/cellular-infrastructure/wiki/HelloSTK>
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For more information see
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<https://osmocom.org/projects/cellular-infrastructure/wiki/Shadysimpy>
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