{"version":3,"file":"Base64Encode.js","sources":["../../src/encode/Base64Encode.ts"],"sourcesContent":["/*\n * Copyright (c) Microsoft Corporation. All rights reserved.\n * Licensed under the MIT License.\n */\n\nimport { Constants } from \"@azure/msal-common\";\nimport { BrowserStringUtils } from \"../utils/BrowserStringUtils\";\n\n/**\n * Class which exposes APIs to encode plaintext to base64 encoded string. See here for implementation details:\n * https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding#Solution_2_%E2%80%93_JavaScript's_UTF-16_%3E_UTF-8_%3E_base64\n */\nexport class Base64Encode {\n    \n    /**\n     * Returns URL Safe b64 encoded string from a plaintext string.\n     * @param input \n     */\n    urlEncode(input: string): string {\n        return encodeURIComponent(this.encode(input)\n            .replace(/=/g, Constants.EMPTY_STRING)\n            .replace(/\\+/g, \"-\")\n            .replace(/\\//g, \"_\"));\n    }\n\n    /**\n     * Returns URL Safe b64 encoded string from an int8Array.\n     * @param inputArr \n     */\n    urlEncodeArr(inputArr: Uint8Array): string {\n        return this.base64EncArr(inputArr)\n            .replace(/=/g, Constants.EMPTY_STRING)\n            .replace(/\\+/g, \"-\")\n            .replace(/\\//g, \"_\");\n    }\n\n    /**\n     * Returns b64 encoded string from plaintext string.\n     * @param input \n     */\n    encode(input: string): string {\n        const inputUtf8Arr = BrowserStringUtils.stringToUtf8Arr(input);\n        return this.base64EncArr(inputUtf8Arr);\n    }\n\n    /**\n     * Base64 encode byte array\n     * @param aBytes \n     */\n    private base64EncArr(aBytes: Uint8Array): string {  \n        const eqLen = (3 - (aBytes.length % 3)) % 3;\n        let sB64Enc = Constants.EMPTY_STRING;\n      \n        for (let nMod3, nLen = aBytes.length, nUint24 = 0, nIdx = 0; nIdx < nLen; nIdx++) {\n            nMod3 = nIdx % 3;\n            /* Uncomment the following line in order to split the output in lines 76-character long: */\n            /*\n             *if (nIdx > 0 && (nIdx * 4 / 3) % 76 === 0) { sB64Enc += \"\\r\\n\"; }\n             */\n            nUint24 |= aBytes[nIdx] << (16 >>> nMod3 & 24);\n            if (nMod3 === 2 || aBytes.length - nIdx === 1) {\n                sB64Enc += String.fromCharCode(\n                    this.uint6ToB64(nUint24 >>> 18 & 63), \n                    this.uint6ToB64(nUint24 >>> 12 & 63), \n                    this.uint6ToB64(nUint24 >>> 6 & 63), \n                    this.uint6ToB64(nUint24 & 63)\n                );\n                nUint24 = 0;\n            }\n        }\n\n        return  eqLen === 0 ? sB64Enc : sB64Enc.substring(0, sB64Enc.length - eqLen) + (eqLen === 1 ? \"=\" : \"==\");\n    }\n\n    /**\n     * Base64 string to array encoding helper\n     * @param nUint6 \n     */\n    private uint6ToB64 (nUint6: number): number {\n        return nUint6 < 26 ?\n            nUint6 + 65\n            : nUint6 < 52 ?\n                nUint6 + 71\n                : nUint6 < 62 ?\n                    nUint6 - 4\n                    : nUint6 === 62 ?\n                        43\n                        : nUint6 === 63 ?\n                            47\n                            :\n                            65;\n    }\n}\n"],"names":[],"mappings":";;;;;AAAA;;;;AAQA;;;;;IAIA;KAgFC;;;;;IA1EG,gCAAS,GAAT,UAAU,KAAa;QACnB,OAAO,kBAAkB,CAAC,IAAI,CAAC,MAAM,CAAC,KAAK,CAAC;aACvC,OAAO,CAAC,IAAI,EAAE,SAAS,CAAC,YAAY,CAAC;aACrC,OAAO,CAAC,KAAK,EAAE,GAAG,CAAC;aACnB,OAAO,CAAC,KAAK,EAAE,GAAG,CAAC,CAAC,CAAC;KAC7B;;;;;IAMD,mCAAY,GAAZ,UAAa,QAAoB;QAC7B,OAAO,IAAI,CAAC,YAAY,CAAC,QAAQ,CAAC;aAC7B,OAAO,CAAC,IAAI,EAAE,SAAS,CAAC,YAAY,CAAC;aACrC,OAAO,CAAC,KAAK,EAAE,GAAG,CAAC;aACnB,OAAO,CAAC,KAAK,EAAE,GAAG,CAAC,CAAC;KAC5B;;;;;IAMD,6BAAM,GAAN,UAAO,KAAa;QAChB,IAAM,YAAY,GAAG,kBAAkB,CAAC,eAAe,CAAC,KAAK,CAAC,CAAC;QAC/D,OAAO,IAAI,CAAC,YAAY,CAAC,YAAY,CAAC,CAAC;KAC1C;;;;;IAMO,mCAAY,GAApB,UAAqB,MAAkB;QACnC,IAAM,KAAK,GAAG,CAAC,CAAC,IAAI,MAAM,CAAC,MAAM,GAAG,CAAC,CAAC,IAAI,CAAC,CAAC;QAC5C,IAAI,OAAO,GAAG,SAAS,CAAC,YAAY,CAAC;QAErC,KAAK,IAAI,KAAK,SAAA,EAAE,IAAI,GAAG,MAAM,CAAC,MAAM,EAAE,OAAO,GAAG,CAAC,EAAE,IAAI,GAAG,CAAC,EAAE,IAAI,GAAG,IAAI,EAAE,IAAI,EAAE,EAAE;YAC9E,KAAK,GAAG,IAAI,GAAG,CAAC,CAAC;;;;;YAKjB,OAAO,IAAI,MAAM,CAAC,IAAI,CAAC,KAAK,EAAE,KAAK,KAAK,GAAG,EAAE,CAAC,CAAC;YAC/C,IAAI,KAAK,KAAK,CAAC,IAAI,MAAM,CAAC,MAAM,GAAG,IAAI,KAAK,CAAC,EAAE;gBAC3C,OAAO,IAAI,MAAM,CAAC,YAAY,CAC1B,IAAI,CAAC,UAAU,CAAC,OAAO,KAAK,EAAE,GAAG,EAAE,CAAC,EACpC,IAAI,CAAC,UAAU,CAAC,OAAO,KAAK,EAAE,GAAG,EAAE,CAAC,EACpC,IAAI,CAAC,UAAU,CAAC,OAAO,KAAK,CAAC,GAAG,EAAE,CAAC,EACnC,IAAI,CAAC,UAAU,CAAC,OAAO,GAAG,EAAE,CAAC,CAChC,CAAC;gBACF,OAAO,GAAG,CAAC,CAAC;aACf;SACJ;QAED,OAAQ,KAAK,KAAK,CAAC,GAAG,OAAO,GAAG,OAAO,CAAC,SAAS,CAAC,CAAC,EAAE,OAAO,CAAC,MAAM,GAAG,KAAK,CAAC,IAAI,KAAK,KAAK,CAAC,GAAG,GAAG,GAAG,IAAI,CAAC,CAAC;KAC7G;;;;;IAMO,iCAAU,GAAlB,UAAoB,MAAc;QAC9B,OAAO,MAAM,GAAG,EAAE;YACd,MAAM,GAAG,EAAE;cACT,MAAM,GAAG,EAAE;gBACT,MAAM,GAAG,EAAE;kBACT,MAAM,GAAG,EAAE;oBACT,MAAM,GAAG,CAAC;sBACR,MAAM,KAAK,EAAE;wBACX,EAAE;0BACA,MAAM,KAAK,EAAE;4BACX,EAAE;;gCAEF,EAAE,CAAC;KAC1B;IACL,mBAAC;AAAD,CAAC;;;;"}