diff options
author | Florian Dold <florian.dold@gmail.com> | 2019-03-27 21:01:33 +0100 |
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committer | Florian Dold <florian.dold@gmail.com> | 2019-03-27 21:01:33 +0100 |
commit | cc97a4dd2a967e1c2273bd5f4c5f49a5bf2e2585 (patch) | |
tree | 92c5d88706a6ffc654d1b133618d357890e7096b /node_modules/public-encrypt/privateDecrypt.js | |
parent | 3771b4d6b67b34c130f3a9a1a15f42deefdb2eda (diff) |
remove node_modules
Diffstat (limited to 'node_modules/public-encrypt/privateDecrypt.js')
-rw-r--r-- | node_modules/public-encrypt/privateDecrypt.js | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/node_modules/public-encrypt/privateDecrypt.js b/node_modules/public-encrypt/privateDecrypt.js deleted file mode 100644 index 9047c0e08..000000000 --- a/node_modules/public-encrypt/privateDecrypt.js +++ /dev/null @@ -1,108 +0,0 @@ -var parseKeys = require('parse-asn1'); -var mgf = require('./mgf'); -var xor = require('./xor'); -var bn = require('bn.js'); -var crt = require('browserify-rsa'); -var createHash = require('create-hash'); -var withPublic = require('./withPublic'); -module.exports = function privateDecrypt(private_key, enc, reverse) { - var padding; - if (private_key.padding) { - padding = private_key.padding; - } else if (reverse) { - padding = 1; - } else { - padding = 4; - } - - var key = parseKeys(private_key); - var k = key.modulus.byteLength(); - if (enc.length > k || new bn(enc).cmp(key.modulus) >= 0) { - throw new Error('decryption error'); - } - var msg; - if (reverse) { - msg = withPublic(new bn(enc), key); - } else { - msg = crt(enc, key); - } - var zBuffer = new Buffer(k - msg.length); - zBuffer.fill(0); - msg = Buffer.concat([zBuffer, msg], k); - if (padding === 4) { - return oaep(key, msg); - } else if (padding === 1) { - return pkcs1(key, msg, reverse); - } else if (padding === 3) { - return msg; - } else { - throw new Error('unknown padding'); - } -}; - -function oaep(key, msg){ - var n = key.modulus; - var k = key.modulus.byteLength(); - var mLen = msg.length; - var iHash = createHash('sha1').update(new Buffer('')).digest(); - var hLen = iHash.length; - var hLen2 = 2 * hLen; - if (msg[0] !== 0) { - throw new Error('decryption error'); - } - var maskedSeed = msg.slice(1, hLen + 1); - var maskedDb = msg.slice(hLen + 1); - var seed = xor(maskedSeed, mgf(maskedDb, hLen)); - var db = xor(maskedDb, mgf(seed, k - hLen - 1)); - if (compare(iHash, db.slice(0, hLen))) { - throw new Error('decryption error'); - } - var i = hLen; - while (db[i] === 0) { - i++; - } - if (db[i++] !== 1) { - throw new Error('decryption error'); - } - return db.slice(i); -} - -function pkcs1(key, msg, reverse){ - var p1 = msg.slice(0, 2); - var i = 2; - var status = 0; - while (msg[i++] !== 0) { - if (i >= msg.length) { - status++; - break; - } - } - var ps = msg.slice(2, i - 1); - var p2 = msg.slice(i - 1, i); - - if ((p1.toString('hex') !== '0002' && !reverse) || (p1.toString('hex') !== '0001' && reverse)){ - status++; - } - if (ps.length < 8) { - status++; - } - if (status) { - throw new Error('decryption error'); - } - return msg.slice(i); -} -function compare(a, b){ - a = new Buffer(a); - b = new Buffer(b); - var dif = 0; - var len = a.length; - if (a.length !== b.length) { - dif++; - len = Math.min(a.length, b.length); - } - var i = -1; - while (++i < len) { - dif += (a[i] ^ b[i]); - } - return dif; -}
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