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| Ledger U2F Applet | ||
| JavaCard U2F Applet | ||
| ================= | ||
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| [](https://travis-ci.org/LedgerHQ/ledger-u2f-javacard) [](https://codecov.io/gh/ledgerhq/ledger-u2f-javacard) | ||
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| # Overview | ||
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| This applet is a Java Card implementation of the [FIDO Alliance U2F standard](https://fidoalliance.org/) | ||
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| It uses no proprietary vendor API and is freely available on [Ledger Unplugged](https://www.ledgerwallet.com/products/6-ledger-unplugged) and for a small fee on other Fidesmo devices through [Fidesmo store](http://www.fidesmo.com/apps/4f97a2e9) | ||
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| # Building | ||
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| - Set the environment variable `JC_HOME` to the folder containg the [Java Card Development Kit 3.0.2](http://www.oracle.com/technetwork/java/embedded/javacard/downloads/index.html) | ||
| - Run `gradlew convertJavacard` | ||
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| # Installing | ||
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| Either load the CAP file using your favorite third party software or refer to [Fidesmo Gradle Plugin](https://github.com/fidesmo/gradle-javacard) to use on the Fidesmo platform | ||
| This applet is a Java Card implementation of the [FIDO Alliance U2F standard](https://fidoalliance.org/). It is a fork of the JavaCard applet from [Ledger](https://github.com/LedgerHQ/ledger-u2f-javacard) with the following modifications | ||
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| The following install parameters are expected : | ||
| - offcard key generation | ||
| - some countermeasures against electromagnetic side-channel attacks | ||
| - works on JavaCard 3.0.1 up to 3.0.5 | ||
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| - 1 byte flag : provide 01 to pass the current [Fido NFC interoperability tests](https://github.com/google/u2f-ref-code/tree/master/u2f-tests), or 00 | ||
| - 2 bytes length (big endian encoded) : length of the attestation certificate to load, supposed to be using a private key on the P-256 curve | ||
| - 32 bytes : private key of the attestation certificate | ||
| # Creating Your Own U2F Token using provided CAP File | ||
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| Before using the applet, the attestation certificate shall be loaded using a proprietary APDU | ||
| # Purpose of this Fork | ||
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| | CLA | INS | P1 | P2 | Data | | ||
| | --- | --- | ------------- | ------------ | ----------------------- | | ||
| | F0 | 01 | offset (high) | offset (low) | Certificate data chunk | | ||
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| # Testing on Android | ||
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| - Download [Google Authenticator](https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2) | ||
| - Test on http://u2fdemo.appspot.com or https://demo.yubico.com/u2f from Chrome | ||
| - For additional API reference and implementations, check [the reference code](https://github.com/google/u2f-ref-code), the [beta NFC API](https://github.com/google/u2f-ref-code/blob/no-extension/u2f-gae-demo/war/js/u2f-api.js) and [Yubico guide](https://www.yubico.com/applications/fido/) | ||
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| # Certification | ||
| # Building | ||
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| This implementation has been certified FIDO U2F compliant on December 17, 2015 (U2F100020151217001). See tag [u2f-certif-171215](https://github.com/LedgerHQ/ledger-u2f-javacard/tree/u2f-certif-171215) | ||
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| # State model | ||
| # Installing | ||
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|  | ||
| # Testing | ||
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| # License | ||
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| This application is licensed under [Apache 2.0](http://www.apache.org/licenses/LICENSE-2.0) | ||
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| # Contact | ||
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| Please contact hello@ledger.fr for any question | ||
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