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Cryptography API](https://www.w3.org/TR/WebCryptoAPI/) shim for legacy browsers.\n\nQuick start with _Bower_\n------------------------\n\nInstall the package\n\n```sh\n$ bower install webcrypto-shim\n```\n\nand link scripts into your html code\n\n```html\n\n\n```\n\nNow you can use webcrypto api through the `window.crypto` and `window.crypto.subtle` objects.\n\nNote that _IE11_ lacks support of `Promise`-s and requires _promiz.js_ to work properly. You can replace _promiz.js_ with any _Promise/A+_-compatible implementation.\n\nSupported browsers\n------------------\n\nThe library is targeted to fix these browsers having prefixed and buggy webcrypto api implementations:\n* _Internet Explorer 11_, _Mobile Internet Explorer 11_,\n* _Safari 8 - 10_, _iOS Safari 8 - 10_.\n\nThese browsers have unprefixed and conforming webcrypto api implementations, so no need in shim:\n* _Chrome 43+_, _Chrome for Android 44+_,\n* _Opera 24+_,\n* _Firefox 34+_,\n* _Edge 12+_.\n* _Safari 11+_.\n\nCrossbrowser support of algorithms & operations\n-----------------------------------------------\n\n* **SHA-256**, **SHA-384**: `digest`\n\n* **HMAC**: `sign`, `verify`, `generateKey`, `importKey`, `exportKey`\n * with _hash_ **SHA-1**, **SHA-256**, **SHA-384**\n\n* **AES-CBC**: `encrypt`, `decrypt`, `generateKey`, `importKey`, `exportKey`, `wrapKey`, `unwrapKey`\n * _TODO_ tests\n\n* **AES-KW**: `generateKey`, `importKey`, `exportKey`, `wrapKey`, `unwrapKey`\n * _TODO_ tests\n\n* **RSASSA-PKCS1-v1\\_5**: `sign`, `verify`, `generateKey`, `importKey`, `exportKey`\n * with _hash_ **SHA-256**, **SHA-384**\n * and _modulusLength_ at least 2048 bits\n\n* **RSA-OAEP**: `encrypt`, `decrypt`, `generateKey`, `importKey`, `exportKey`, `wrapKey`, `unwrapKey`\n * with _hash_ **SHA-1**\n * and _modulusLength_ at least 2048 bits\n * _FIXME_ only `\"jwk\"` format for wrapped/unwrapped keys\n\nKnown limitations\n-----------------\n\n`deriveKey`, `deriveBits` are not supported under _IE11_ and _Safari_ since there is no implementation of any algorithm providing key derivation.\n\nUnder _IE11_ exception is thrown in case of empty input data since _IE11_ silently discards empty data and leaves returned `Promise` object never resolved nor rejected.\n\nOther browsers support\n----------------------\n\nSee https://vibornoff.github.io/webcrypto-examples/index.html\n\nSponsored by\n------------\n\n[BrowserStack](https://browserstack.com) — automated & manual crossbrowser testing solution.\n","_attachments":{},"homepage":"https://github.com/vibornoff/webcrypto-shim#readme","bugs":{"url":"https://github.com/vibornoff/webcrypto-shim/issues"},"license":"MIT"}