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PKCE Code Verifier and Code Challenge Generator. DEMO:https://tonyxu-io.github.io/pkce-generator/
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.min.js"></script> | |
| <script> | |
| function generateCodeVerifier() { | |
| var code_verifier = generateRandomString(128) | |
| document.getElementById("code_verifier").value = code_verifier | |
| } | |
| function generateRandomString(length) { | |
| var text = ""; | |
| var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~"; | |
| for (var i = 0; i < length; i++) { | |
| text += possible.charAt(Math.floor(Math.random() * possible.length)); | |
| } | |
| return text; | |
| } | |
| function generateCodeChallenge(code_verifier) { | |
| return code_challenge = base64URL(CryptoJS.SHA256(code_verifier)) | |
| } | |
| function base64URL(string) { | |
| return string.toString(CryptoJS.enc.Base64).replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_') | |
| } | |
| function submit() { | |
| var code_verifier = document.getElementById("code_verifier").value | |
| var code_challenge = generateCodeChallenge(code_verifier) | |
| document.getElementById("code_challenge").innerHTML = code_challenge | |
| document.getElementById("code_challenge_div").style.display ="block" | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <div> | |
| <label for="code_verifier">Code Verifier: </label> | |
| <input type="text" id="code_verifier" name="code_verifier" size="38"> | |
| </div> | |
| <br> | |
| <div style="display:none" id="code_challenge_div"> | |
| Code Challenge: | |
| <span id="code_challenge"> | |
| </span> | |
| </div> | |
| <br> | |
| <div> | |
| <button onclick="generateCodeVerifier()">Generate Code Verifier</button> | |
| <button onclick="submit()">Generate Code Challenge</button> | |
| </div> | |
| </body> | |
| </html> |
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