forked from svrjs/svrjs
50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
|
var inherits = require('inherits');
|
||
|
|
var Buffer = require('buffer').Buffer;
|
||
|
|
|
||
|
|
var DERDecoder = require('./der');
|
||
|
|
|
||
|
|
function PEMDecoder(entity) {
|
||
|
|
DERDecoder.call(this, entity);
|
||
|
|
this.enc = 'pem';
|
||
|
|
};
|
||
|
|
inherits(PEMDecoder, DERDecoder);
|
||
|
|
module.exports = PEMDecoder;
|
||
|
|
|
||
|
|
PEMDecoder.prototype.decode = function decode(data, options) {
|
||
|
|
var lines = data.toString().split(/[\r\n]+/g);
|
||
|
|
|
||
|
|
var label = options.label.toUpperCase();
|
||
|
|
|
||
|
|
var re = /^-----(BEGIN|END) ([^-]+)-----$/;
|
||
|
|
var start = -1;
|
||
|
|
var end = -1;
|
||
|
|
for (var i = 0; i < lines.length; i++) {
|
||
|
|
var match = lines[i].match(re);
|
||
|
|
if (match === null)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if (match[2] !== label)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if (start === -1) {
|
||
|
|
if (match[1] !== 'BEGIN')
|
||
|
|
break;
|
||
|
|
start = i;
|
||
|
|
} else {
|
||
|
|
if (match[1] !== 'END')
|
||
|
|
break;
|
||
|
|
end = i;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (start === -1 || end === -1)
|
||
|
|
throw new Error('PEM section not found for: ' + label);
|
||
|
|
|
||
|
|
var base64 = lines.slice(start + 1, end).join('');
|
||
|
|
// Remove excessive symbols
|
||
|
|
base64.replace(/[^a-z0-9\+\/=]+/gi, '');
|
||
|
|
|
||
|
|
var input = new Buffer(base64, 'base64');
|
||
|
|
return DERDecoder.prototype.decode.call(this, input, options);
|
||
|
|
};
|