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Diffstat (limited to 'alarm/node_modules/node-forge/js/pem.js')
-rw-r--r-- | alarm/node_modules/node-forge/js/pem.js | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/alarm/node_modules/node-forge/js/pem.js b/alarm/node_modules/node-forge/js/pem.js new file mode 100644 index 0000000..e3085dc --- /dev/null +++ b/alarm/node_modules/node-forge/js/pem.js @@ -0,0 +1,285 @@ +/** + * Javascript implementation of basic PEM (Privacy Enhanced Mail) algorithms. + * + * See: RFC 1421. + * + * @author Dave Longley + * + * Copyright (c) 2013-2014 Digital Bazaar, Inc. + * + * A Forge PEM object has the following fields: + * + * type: identifies the type of message (eg: "RSA PRIVATE KEY"). + * + * procType: identifies the type of processing performed on the message, + * it has two subfields: version and type, eg: 4,ENCRYPTED. + * + * contentDomain: identifies the type of content in the message, typically + * only uses the value: "RFC822". + * + * dekInfo: identifies the message encryption algorithm and mode and includes + * any parameters for the algorithm, it has two subfields: algorithm and + * parameters, eg: DES-CBC,F8143EDE5960C597. + * + * headers: contains all other PEM encapsulated headers -- where order is + * significant (for pairing data like recipient ID + key info). + * + * body: the binary-encoded body. + */ +(function() { +/* ########## Begin module implementation ########## */ +function initModule(forge) { + +// shortcut for pem API +var pem = forge.pem = forge.pem || {}; + +/** + * Encodes (serializes) the given PEM object. + * + * @param msg the PEM message object to encode. + * @param options the options to use: + * maxline the maximum characters per line for the body, (default: 64). + * + * @return the PEM-formatted string. + */ +pem.encode = function(msg, options) { + options = options || {}; + var rval = '-----BEGIN ' + msg.type + '-----\r\n'; + + // encode special headers + var header; + if(msg.procType) { + header = { + name: 'Proc-Type', + values: [String(msg.procType.version), msg.procType.type] + }; + rval += foldHeader(header); + } + if(msg.contentDomain) { + header = {name: 'Content-Domain', values: [msg.contentDomain]}; + rval += foldHeader(header); + } + if(msg.dekInfo) { + header = {name: 'DEK-Info', values: [msg.dekInfo.algorithm]}; + if(msg.dekInfo.parameters) { + header.values.push(msg.dekInfo.parameters); + } + rval += foldHeader(header); + } + + if(msg.headers) { + // encode all other headers + for(var i = 0; i < msg.headers.length; ++i) { + rval += foldHeader(msg.headers[i]); + } + } + + // terminate header + if(msg.procType) { + rval += '\r\n'; + } + + // add body + rval += forge.util.encode64(msg.body, options.maxline || 64) + '\r\n'; + + rval += '-----END ' + msg.type + '-----\r\n'; + return rval; +}; + +/** + * Decodes (deserializes) all PEM messages found in the given string. + * + * @param str the PEM-formatted string to decode. + * + * @return the PEM message objects in an array. + */ +pem.decode = function(str) { + var rval = []; + + // split string into PEM messages (be lenient w/EOF on BEGIN line) + var rMessage = /\s*-----BEGIN ([A-Z0-9- ]+)-----\r?\n?([\x21-\x7e\s]+?(?:\r?\n\r?\n))?([:A-Za-z0-9+\/=\s]+?)-----END \1-----/g; + var rHeader = /([\x21-\x7e]+):\s*([\x21-\x7e\s^:]+)/; + var rCRLF = /\r?\n/; + var match; + while(true) { + match = rMessage.exec(str); + if(!match) { + break; + } + + var msg = { + type: match[1], + procType: null, + contentDomain: null, + dekInfo: null, + headers: [], + body: forge.util.decode64(match[3]) + }; + rval.push(msg); + + // no headers + if(!match[2]) { + continue; + } + + // parse headers + var lines = match[2].split(rCRLF); + var li = 0; + while(match && li < lines.length) { + // get line, trim any rhs whitespace + var line = lines[li].replace(/\s+$/, ''); + + // RFC2822 unfold any following folded lines + for(var nl = li + 1; nl < lines.length; ++nl) { + var next = lines[nl]; + if(!/\s/.test(next[0])) { + break; + } + line += next; + li = nl; + } + + // parse header + match = line.match(rHeader); + if(match) { + var header = {name: match[1], values: []}; + var values = match[2].split(','); + for(var vi = 0; vi < values.length; ++vi) { + header.values.push(ltrim(values[vi])); + } + + // Proc-Type must be the first header + if(!msg.procType) { + if(header.name !== 'Proc-Type') { + throw new Error('Invalid PEM formatted message. The first ' + + 'encapsulated header must be "Proc-Type".'); + } else if(header.values.length !== 2) { + throw new Error('Invalid PEM formatted message. The "Proc-Type" ' + + 'header must have two subfields.'); + } + msg.procType = {version: values[0], type: values[1]}; + } else if(!msg.contentDomain && header.name === 'Content-Domain') { + // special-case Content-Domain + msg.contentDomain = values[0] || ''; + } else if(!msg.dekInfo && header.name === 'DEK-Info') { + // special-case DEK-Info + if(header.values.length === 0) { + throw new Error('Invalid PEM formatted message. The "DEK-Info" ' + + 'header must have at least one subfield.'); + } + msg.dekInfo = {algorithm: values[0], parameters: values[1] || null}; + } else { + msg.headers.push(header); + } + } + + ++li; + } + + if(msg.procType === 'ENCRYPTED' && !msg.dekInfo) { + throw new Error('Invalid PEM formatted message. The "DEK-Info" ' + + 'header must be present if "Proc-Type" is "ENCRYPTED".'); + } + } + + if(rval.length === 0) { + throw new Error('Invalid PEM formatted message.'); + } + + return rval; +}; + +function foldHeader(header) { + var rval = header.name + ': '; + + // ensure values with CRLF are folded + var values = []; + var insertSpace = function(match, $1) { + return ' ' + $1; + }; + for(var i = 0; i < header.values.length; ++i) { + values.push(header.values[i].replace(/^(\S+\r\n)/, insertSpace)); + } + rval += values.join(',') + '\r\n'; + + // do folding + var length = 0; + var candidate = -1; + for(var i = 0; i < rval.length; ++i, ++length) { + if(length > 65 && candidate !== -1) { + var insert = rval[candidate]; + if(insert === ',') { + ++candidate; + rval = rval.substr(0, candidate) + '\r\n ' + rval.substr(candidate); + } else { + rval = rval.substr(0, candidate) + + '\r\n' + insert + rval.substr(candidate + 1); + } + length = (i - candidate - 1); + candidate = -1; + ++i; + } else if(rval[i] === ' ' || rval[i] === '\t' || rval[i] === ',') { + candidate = i; + } + } + + return rval; +} + +function ltrim(str) { + return str.replace(/^\s+/, ''); +} + +} // end module implementation + +/* ########## Begin module wrapper ########## */ +var name = 'pem'; +if(typeof define !== 'function') { + // NodeJS -> AMD + if(typeof module === 'object' && module.exports) { + var nodeJS = true; + define = function(ids, factory) { + factory(require, module); + }; + } else { + // <script> + if(typeof forge === 'undefined') { + forge = {}; + } + return initModule(forge); + } +} +// AMD +var deps; +var defineFunc = function(require, module) { + module.exports = function(forge) { + var mods = deps.map(function(dep) { + return require(dep); + }).concat(initModule); + // handle circular dependencies + forge = forge || {}; + forge.defined = forge.defined || {}; + if(forge.defined[name]) { + return forge[name]; + } + forge.defined[name] = true; + for(var i = 0; i < mods.length; ++i) { + mods[i](forge); + } + return forge[name]; + }; +}; +var tmpDefine = define; +define = function(ids, factory) { + deps = (typeof ids === 'string') ? factory.slice(2) : ids.slice(2); + if(nodeJS) { + delete define; + return tmpDefine.apply(null, Array.prototype.slice.call(arguments, 0)); + } + define = tmpDefine; + return define.apply(null, Array.prototype.slice.call(arguments, 0)); +}; +define(['require', 'module', './util'], function() { + defineFunc.apply(null, Array.prototype.slice.call(arguments, 0)); +}); +})(); |