94 lines
2.9 KiB
JavaScript
94 lines
2.9 KiB
JavaScript
'use strict';
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var x509 = module.exports;
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var ASN1 = require('./asn1.js');
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var Enc = require('./encoding.js');
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x509.guess = function (der, asn1) {
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// accepting der for compatability with other usages
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var meta = { kty: 'RSA', format: 'pkcs1', public: true };
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//meta.asn1 = ASN1.parse(u8);
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if (asn1.children.every(function(el) {
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return 0x02 === el.type;
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})) {
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if (2 === asn1.children.length) {
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// rsa pkcs1 public
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return meta;
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} else if (asn1.children.length >= 9) {
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// the standard allows for "otherPrimeInfos", hence at least 9
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meta.public = false;
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// rsa pkcs1 private
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return meta;
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} else {
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throw new Error("not an RSA PKCS#1 public or private key (wrong number of ints)");
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}
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} else {
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meta.format = 'pkcs8';
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}
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return meta;
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};
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x509.parsePkcs1 = function parseRsaPkcs1(buf, asn1, jwk) {
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if (!asn1.children.every(function(el) {
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return 0x02 === el.type;
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})) {
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throw new Error("not an RSA PKCS#1 public or private key (not all ints)");
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}
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if (2 === asn1.children.length) {
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jwk.n = Enc.bufToUrlBase64(asn1.children[0].value);
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jwk.e = Enc.bufToUrlBase64(asn1.children[1].value);
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return jwk;
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} else if (asn1.children.length >= 9) {
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// the standard allows for "otherPrimeInfos", hence at least 9
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jwk.n = Enc.bufToUrlBase64(asn1.children[1].value);
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jwk.e = Enc.bufToUrlBase64(asn1.children[2].value);
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jwk.d = Enc.bufToUrlBase64(asn1.children[3].value);
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jwk.p = Enc.bufToUrlBase64(asn1.children[4].value);
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jwk.q = Enc.bufToUrlBase64(asn1.children[5].value);
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jwk.dp = Enc.bufToUrlBase64(asn1.children[6].value);
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jwk.dq = Enc.bufToUrlBase64(asn1.children[7].value);
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jwk.qi = Enc.bufToUrlBase64(asn1.children[8].value);
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return jwk;
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} else {
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throw new Error("not an RSA PKCS#1 public or private key (wrong number of ints)");
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}
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};
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x509.parsePkcs8 = function parseRsaPkcs8(buf, asn1, jwk) {
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if (2 === asn1.children.length
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&& 0x03 === asn1.children[1].type
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&& 0x30 === asn1.children[1].value[0]) {
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asn1 = ASN1.parse(asn1.children[1].value);
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jwk.n = Enc.bufToUrlBase64(asn1.children[0].value);
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jwk.e = Enc.bufToUrlBase64(asn1.children[1].value);
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} else if (3 === asn1.children.length
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&& 0x04 === asn1.children[2].type
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&& 0x30 === asn1.children[2].children[0].type
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&& 0x02 === asn1.children[2].children[0].children[0].type) {
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asn1 = asn1.children[2].children[0];
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jwk.n = Enc.bufToUrlBase64(asn1.children[1].value);
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jwk.e = Enc.bufToUrlBase64(asn1.children[2].value);
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jwk.d = Enc.bufToUrlBase64(asn1.children[3].value);
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jwk.p = Enc.bufToUrlBase64(asn1.children[4].value);
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jwk.q = Enc.bufToUrlBase64(asn1.children[5].value);
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jwk.dp = Enc.bufToUrlBase64(asn1.children[6].value);
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jwk.dq = Enc.bufToUrlBase64(asn1.children[7].value);
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jwk.qi = Enc.bufToUrlBase64(asn1.children[8].value);
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} else {
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throw new Error("not an RSA PKCS#8 public or private key (wrong format)");
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}
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return jwk;
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};
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