85 lines
1.5 KiB
JavaScript
85 lines
1.5 KiB
JavaScript
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/* eslint no-bitwise: 0 */
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function wrap(text, len) {
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const length = len || 72;
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let result = "";
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for (let i = 0; i < text.length; i += length) {
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result += text.slice(i, i + length);
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result += "\n";
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}
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return result;
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}
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function pemPrivateKey(key) {
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return `-----BEGIN PRIVATE KEY-----\n${wrap(key, 64)}-----END PRIVATE KEY-----`;
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}
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function stripPemFormatting(str) {
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return str
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.replace(/^-----BEGIN (?:RSA )?(?:PRIVATE|PUBLIC) KEY-----$/m, "")
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.replace(/^-----END (?:RSA )?(?:PRIVATE|PUBLIC) KEY-----$/m, "")
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.replace(/[\n\r]/g, "");
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}
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function arrayToPem(a) {
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return window.btoa(a.map(c => String.fromCharCode(c)).join(""));
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}
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function stringToArray(s) {
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return s.split("").map(c => c.charCodeAt());
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}
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function pemToArray(pem) {
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return stringToArray(window.atob(pem));
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}
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const prefix = [
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0x30,
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0x82,
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0x04,
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0xbc,
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0x02,
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0x01,
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0x00,
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0x30,
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0x0d,
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0x06,
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0x09,
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0x2a,
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0x86,
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0x48,
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0x86,
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0xf7,
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0x0d,
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0x01,
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0x01,
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0x01,
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0x05,
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0x00,
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0x04,
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0x82,
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0x04,
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0xa6,
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];
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function pkcs1To8(privateKeyPkcs1Pem) {
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const pem = stripPemFormatting(privateKeyPkcs1Pem);
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const privateKeyPkcs1Array = pemToArray(pem);
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const prefixPkcs8 = prefix.concat(privateKeyPkcs1Array);
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const privateKeyPkcs8Pem = arrayToPem(prefixPkcs8);
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const pkcs8Pem = pemPrivateKey(privateKeyPkcs8Pem);
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return pkcs8Pem;
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}
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// crypto.subtle.importKey(
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// "spki",
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// keyTextBuffer,
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// {
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// name: "RSASSA-PKCS1-v1_5",
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// hash: { name: "SHA-256" },
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// },
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// true,
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// ["verify"]
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// );
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module.exports = { pkcs1To8 };
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