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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/asn1.js/lib/asn1/decoders | |
download | website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.gz website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.bz2 website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.zip |
api, login, auth
Diffstat (limited to 'node_modules/asn1.js/lib/asn1/decoders')
-rw-r--r-- | node_modules/asn1.js/lib/asn1/decoders/der.js | 335 | ||||
-rw-r--r-- | node_modules/asn1.js/lib/asn1/decoders/index.js | 6 | ||||
-rw-r--r-- | node_modules/asn1.js/lib/asn1/decoders/pem.js | 51 |
3 files changed, 392 insertions, 0 deletions
diff --git a/node_modules/asn1.js/lib/asn1/decoders/der.js b/node_modules/asn1.js/lib/asn1/decoders/der.js new file mode 100644 index 0000000..c5b0515 --- /dev/null +++ b/node_modules/asn1.js/lib/asn1/decoders/der.js @@ -0,0 +1,335 @@ +'use strict'; + +const inherits = require('inherits'); + +const bignum = require('bn.js'); +const DecoderBuffer = require('../base/buffer').DecoderBuffer; +const Node = require('../base/node'); + +// Import DER constants +const der = require('../constants/der'); + +function DERDecoder(entity) { + this.enc = 'der'; + this.name = entity.name; + this.entity = entity; + + // Construct base tree + this.tree = new DERNode(); + this.tree._init(entity.body); +} +module.exports = DERDecoder; + +DERDecoder.prototype.decode = function decode(data, options) { + if (!DecoderBuffer.isDecoderBuffer(data)) { + data = new DecoderBuffer(data, options); + } + + return this.tree._decode(data, options); +}; + +// Tree methods + +function DERNode(parent) { + Node.call(this, 'der', parent); +} +inherits(DERNode, Node); + +DERNode.prototype._peekTag = function peekTag(buffer, tag, any) { + if (buffer.isEmpty()) + return false; + + const state = buffer.save(); + const decodedTag = derDecodeTag(buffer, 'Failed to peek tag: "' + tag + '"'); + if (buffer.isError(decodedTag)) + return decodedTag; + + buffer.restore(state); + + return decodedTag.tag === tag || decodedTag.tagStr === tag || + (decodedTag.tagStr + 'of') === tag || any; +}; + +DERNode.prototype._decodeTag = function decodeTag(buffer, tag, any) { + const decodedTag = derDecodeTag(buffer, + 'Failed to decode tag of "' + tag + '"'); + if (buffer.isError(decodedTag)) + return decodedTag; + + let len = derDecodeLen(buffer, + decodedTag.primitive, + 'Failed to get length of "' + tag + '"'); + + // Failure + if (buffer.isError(len)) + return len; + + if (!any && + decodedTag.tag !== tag && + decodedTag.tagStr !== tag && + decodedTag.tagStr + 'of' !== tag) { + return buffer.error('Failed to match tag: "' + tag + '"'); + } + + if (decodedTag.primitive || len !== null) + return buffer.skip(len, 'Failed to match body of: "' + tag + '"'); + + // Indefinite length... find END tag + const state = buffer.save(); + const res = this._skipUntilEnd( + buffer, + 'Failed to skip indefinite length body: "' + this.tag + '"'); + if (buffer.isError(res)) + return res; + + len = buffer.offset - state.offset; + buffer.restore(state); + return buffer.skip(len, 'Failed to match body of: "' + tag + '"'); +}; + +DERNode.prototype._skipUntilEnd = function skipUntilEnd(buffer, fail) { + for (;;) { + const tag = derDecodeTag(buffer, fail); + if (buffer.isError(tag)) + return tag; + const len = derDecodeLen(buffer, tag.primitive, fail); + if (buffer.isError(len)) + return len; + + let res; + if (tag.primitive || len !== null) + res = buffer.skip(len); + else + res = this._skipUntilEnd(buffer, fail); + + // Failure + if (buffer.isError(res)) + return res; + + if (tag.tagStr === 'end') + break; + } +}; + +DERNode.prototype._decodeList = function decodeList(buffer, tag, decoder, + options) { + const result = []; + while (!buffer.isEmpty()) { + const possibleEnd = this._peekTag(buffer, 'end'); + if (buffer.isError(possibleEnd)) + return possibleEnd; + + const res = decoder.decode(buffer, 'der', options); + if (buffer.isError(res) && possibleEnd) + break; + result.push(res); + } + return result; +}; + +DERNode.prototype._decodeStr = function decodeStr(buffer, tag) { + if (tag === 'bitstr') { + const unused = buffer.readUInt8(); + if (buffer.isError(unused)) + return unused; + return { unused: unused, data: buffer.raw() }; + } else if (tag === 'bmpstr') { + const raw = buffer.raw(); + if (raw.length % 2 === 1) + return buffer.error('Decoding of string type: bmpstr length mismatch'); + + let str = ''; + for (let i = 0; i < raw.length / 2; i++) { + str += String.fromCharCode(raw.readUInt16BE(i * 2)); + } + return str; + } else if (tag === 'numstr') { + const numstr = buffer.raw().toString('ascii'); + if (!this._isNumstr(numstr)) { + return buffer.error('Decoding of string type: ' + + 'numstr unsupported characters'); + } + return numstr; + } else if (tag === 'octstr') { + return buffer.raw(); + } else if (tag === 'objDesc') { + return buffer.raw(); + } else if (tag === 'printstr') { + const printstr = buffer.raw().toString('ascii'); + if (!this._isPrintstr(printstr)) { + return buffer.error('Decoding of string type: ' + + 'printstr unsupported characters'); + } + return printstr; + } else if (/str$/.test(tag)) { + return buffer.raw().toString(); + } else { + return buffer.error('Decoding of string type: ' + tag + ' unsupported'); + } +}; + +DERNode.prototype._decodeObjid = function decodeObjid(buffer, values, relative) { + let result; + const identifiers = []; + let ident = 0; + let subident = 0; + while (!buffer.isEmpty()) { + subident = buffer.readUInt8(); + ident <<= 7; + ident |= subident & 0x7f; + if ((subident & 0x80) === 0) { + identifiers.push(ident); + ident = 0; + } + } + if (subident & 0x80) + identifiers.push(ident); + + const first = (identifiers[0] / 40) | 0; + const second = identifiers[0] % 40; + + if (relative) + result = identifiers; + else + result = [first, second].concat(identifiers.slice(1)); + + if (values) { + let tmp = values[result.join(' ')]; + if (tmp === undefined) + tmp = values[result.join('.')]; + if (tmp !== undefined) + result = tmp; + } + + return result; +}; + +DERNode.prototype._decodeTime = function decodeTime(buffer, tag) { + const str = buffer.raw().toString(); + + let year; + let mon; + let day; + let hour; + let min; + let sec; + if (tag === 'gentime') { + year = str.slice(0, 4) | 0; + mon = str.slice(4, 6) | 0; + day = str.slice(6, 8) | 0; + hour = str.slice(8, 10) | 0; + min = str.slice(10, 12) | 0; + sec = str.slice(12, 14) | 0; + } else if (tag === 'utctime') { + year = str.slice(0, 2) | 0; + mon = str.slice(2, 4) | 0; + day = str.slice(4, 6) | 0; + hour = str.slice(6, 8) | 0; + min = str.slice(8, 10) | 0; + sec = str.slice(10, 12) | 0; + if (year < 70) + year = 2000 + year; + else + year = 1900 + year; + } else { + return buffer.error('Decoding ' + tag + ' time is not supported yet'); + } + + return Date.UTC(year, mon - 1, day, hour, min, sec, 0); +}; + +DERNode.prototype._decodeNull = function decodeNull() { + return null; +}; + +DERNode.prototype._decodeBool = function decodeBool(buffer) { + const res = buffer.readUInt8(); + if (buffer.isError(res)) + return res; + else + return res !== 0; +}; + +DERNode.prototype._decodeInt = function decodeInt(buffer, values) { + // Bigint, return as it is (assume big endian) + const raw = buffer.raw(); + let res = new bignum(raw); + + if (values) + res = values[res.toString(10)] || res; + + return res; +}; + +DERNode.prototype._use = function use(entity, obj) { + if (typeof entity === 'function') + entity = entity(obj); + return entity._getDecoder('der').tree; +}; + +// Utility methods + +function derDecodeTag(buf, fail) { + let tag = buf.readUInt8(fail); + if (buf.isError(tag)) + return tag; + + const cls = der.tagClass[tag >> 6]; + const primitive = (tag & 0x20) === 0; + + // Multi-octet tag - load + if ((tag & 0x1f) === 0x1f) { + let oct = tag; + tag = 0; + while ((oct & 0x80) === 0x80) { + oct = buf.readUInt8(fail); + if (buf.isError(oct)) + return oct; + + tag <<= 7; + tag |= oct & 0x7f; + } + } else { + tag &= 0x1f; + } + const tagStr = der.tag[tag]; + + return { + cls: cls, + primitive: primitive, + tag: tag, + tagStr: tagStr + }; +} + +function derDecodeLen(buf, primitive, fail) { + let len = buf.readUInt8(fail); + if (buf.isError(len)) + return len; + + // Indefinite form + if (!primitive && len === 0x80) + return null; + + // Definite form + if ((len & 0x80) === 0) { + // Short form + return len; + } + + // Long form + const num = len & 0x7f; + if (num > 4) + return buf.error('length octect is too long'); + + len = 0; + for (let i = 0; i < num; i++) { + len <<= 8; + const j = buf.readUInt8(fail); + if (buf.isError(j)) + return j; + len |= j; + } + + return len; +} diff --git a/node_modules/asn1.js/lib/asn1/decoders/index.js b/node_modules/asn1.js/lib/asn1/decoders/index.js new file mode 100644 index 0000000..14fb05a --- /dev/null +++ b/node_modules/asn1.js/lib/asn1/decoders/index.js @@ -0,0 +1,6 @@ +'use strict'; + +const decoders = exports; + +decoders.der = require('./der'); +decoders.pem = require('./pem'); diff --git a/node_modules/asn1.js/lib/asn1/decoders/pem.js b/node_modules/asn1.js/lib/asn1/decoders/pem.js new file mode 100644 index 0000000..2b050ef --- /dev/null +++ b/node_modules/asn1.js/lib/asn1/decoders/pem.js @@ -0,0 +1,51 @@ +'use strict'; + +const inherits = require('inherits'); +const Buffer = require('safer-buffer').Buffer; + +const 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) { + const lines = data.toString().split(/[\r\n]+/g); + + const label = options.label.toUpperCase(); + + const re = /^-----(BEGIN|END) ([^-]+)-----$/; + let start = -1; + let end = -1; + for (let i = 0; i < lines.length; i++) { + const 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); + + const base64 = lines.slice(start + 1, end).join(''); + // Remove excessive symbols + base64.replace(/[^a-z0-9+/=]+/gi, ''); + + const input = Buffer.from(base64, 'base64'); + return DERDecoder.prototype.decode.call(this, input, options); +}; |