diff options
Diffstat (limited to 'node_modules/evp_bytestokey/index.js')
-rw-r--r-- | node_modules/evp_bytestokey/index.js | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/node_modules/evp_bytestokey/index.js b/node_modules/evp_bytestokey/index.js new file mode 100644 index 000000000..25fbc9c24 --- /dev/null +++ b/node_modules/evp_bytestokey/index.js @@ -0,0 +1,68 @@ +var md5 = require('create-hash/md5') +module.exports = EVP_BytesToKey +function EVP_BytesToKey (password, salt, keyLen, ivLen) { + if (!Buffer.isBuffer(password)) { + password = new Buffer(password, 'binary') + } + if (salt && !Buffer.isBuffer(salt)) { + salt = new Buffer(salt, 'binary') + } + keyLen = keyLen / 8 + ivLen = ivLen || 0 + var ki = 0 + var ii = 0 + var key = new Buffer(keyLen) + var iv = new Buffer(ivLen) + var addmd = 0 + var md_buf + var i + var bufs = [] + while (true) { + if (addmd++ > 0) { + bufs.push(md_buf) + } + bufs.push(password) + if (salt) { + bufs.push(salt) + } + md_buf = md5(Buffer.concat(bufs)) + bufs = [] + i = 0 + if (keyLen > 0) { + while (true) { + if (keyLen === 0) { + break + } + if (i === md_buf.length) { + break + } + key[ki++] = md_buf[i] + keyLen-- + i++ + } + } + if (ivLen > 0 && i !== md_buf.length) { + while (true) { + if (ivLen === 0) { + break + } + if (i === md_buf.length) { + break + } + iv[ii++] = md_buf[i] + ivLen-- + i++ + } + } + if (keyLen === 0 && ivLen === 0) { + break + } + } + for (i = 0; i < md_buf.length; i++) { + md_buf[i] = 0 + } + return { + key: key, + iv: iv + } +} |