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Revert passing signatureValue and fix formatting #78

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merged 1 commit into from
Jan 11, 2021
Merged

Revert passing signatureValue and fix formatting #78

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132 changes: 62 additions & 70 deletions web-crypto/sign-verify/rsassa-pkcs1.js
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Original file line number Diff line number Diff line change
@@ -1,96 +1,88 @@
(() => {
/*

/*
Store the calculated signature here, so we can verify it later.
*/
let signature;
let signature;

/*
/*
Fetch the contents of the "message" textbox, and encode it
in a form we can use for sign operation.
*/
function getMessageEncoding() {
const messageBox = document.querySelector("#rsassa-pkcs1-message");
let message = messageBox.value;
let enc = new TextEncoder();
return enc.encode(message);
}
function getMessageEncoding() {
const messageBox = document.querySelector("#rsassa-pkcs1-message");
let message = messageBox.value;
let enc = new TextEncoder();
return enc.encode(message);
}

/*
/*
Get the encoded message-to-sign, sign it and display a representation
of the first part of it in the "signature" element.
*/
async function signMessage(privateKey) {
const signatureValue = document.querySelector(
".rsassa-pkcs1 .signature-value"
);
signatureValue.classList.remove("valid", "invalid");
async function signMessage(privateKey) {
const signatureValue = document.querySelector(".rsassa-pkcs1 .signature-value");
signatureValue.classList.remove("valid", "invalid");

let encoded = getMessageEncoding();
signature = await window.crypto.subtle.sign(
"RSASSA-PKCS1-v1_5",
privateKey,
encoded
);
let encoded = getMessageEncoding();
signature = await window.crypto.subtle.sign(
"RSASSA-PKCS1-v1_5",
privateKey,
encoded
);

signatureValue.classList.add("fade-in");
signatureValue.addEventListener("animationend", () => {
signatureValue.classList.remove("fade-in");
});
let buffer = new Uint8Array(signature, 0, 5);
signatureValue.textContent = `${buffer}...[${signature.byteLength} bytes total]`;
}
signatureValue.classList.add('fade-in');
signatureValue.addEventListener('animationend', () => {
signatureValue.classList.remove('fade-in');
});
let buffer = new Uint8Array(signature, 0, 5);
signatureValue.textContent = `${buffer}...[${signature.byteLength} bytes total]`;
}

/*
/*
Fetch the encoded message-to-sign and verify it against the stored signature.
* If it checks out, set the "valid" class on the signature.
* Otherwise set the "invalid" class.
*/
async function verifyMessage(publicKey) {
const signatureValue = document.querySelector(
".rsassa-pkcs1 .signature-value"
);
signatureValue.classList.remove("valid", "invalid");
async function verifyMessage(publicKey) {
const signatureValue = document.querySelector(".rsassa-pkcs1 .signature-value");
signatureValue.classList.remove("valid", "invalid");

let encoded = getMessageEncoding();
let result = await window.crypto.subtle.verify(
"RSASSA-PKCS1-v1_5",
publicKey,
signatureValue,
encoded
);
let encoded = getMessageEncoding();
let result = await window.crypto.subtle.verify(
"RSASSA-PKCS1-v1_5",
publicKey,
signature,
encoded
);

signatureValue.classList.add(result ? "valid" : "invalid");
}
signatureValue.classList.add(result ? "valid" : "invalid");
}

/*
/*
Generate a sign/verify key, then set up event listeners
on the "Sign" and "Verify" buttons.
*/
window.crypto.subtle
.generateKey(
{
name: "RSASSA-PKCS1-v1_5",
// Consider using a 4096-bit key for systems that require long-term security
modulusLength: 2048,
publicExponent: new Uint8Array([1, 0, 1]),
hash: "SHA-256",
},
true,
["sign", "verify"]
)
.then((keyPair) => {
const signButton = document.querySelector(
".rsassa-pkcs1 .sign-button"
);
signButton.addEventListener("click", () => {
signMessage(keyPair.privateKey);
});
window.crypto.subtle.generateKey(
{
name: "RSASSA-PKCS1-v1_5",
// Consider using a 4096-bit key for systems that require long-term security
modulusLength: 2048,
publicExponent: new Uint8Array([1, 0, 1]),
hash: "SHA-256",
},
true,
["sign", "verify"]
).then((keyPair) => {
const signButton = document.querySelector(".rsassa-pkcs1 .sign-button");
signButton.addEventListener("click", () => {
signMessage(keyPair.privateKey);
});

const verifyButton = document.querySelector(".rsassa-pkcs1 .verify-button");
verifyButton.addEventListener("click", () => {
verifyMessage(keyPair.publicKey);
});
});

const verifyButton = document.querySelector(
".rsassa-pkcs1 .verify-button"
);
verifyButton.addEventListener("click", () => {
verifyMessage(keyPair.publicKey);
});
});
})();