v2.0.0, update for modern nodejs

The default options.symmetricCypherName changed from aes-256-ecb to aes-128-ecb,
The default behavior of options.iv == null changed from to use crypto.createCipher to to use crypto.createCipheriv with an empty iv.
Updated to modern Buffer creation.

For the projects used this library with options.iv set to a valid iv buffer, no change is required to make compatible with 1.0.0. Other projects can set options.iv = undefined to make compatible with an older version.

In the version 1.0.0, it is advised to use a null iv for ECB mode ciphers, which will use crypto.createCipher -> EVP_BytesToKey to derive a key. However, as noted in the latest manual of EVP_BytesToKey that "Newer applications should use a more modern algorithm such as PBKDF2 as defined in PKCS#5v2.1 and provided by PKCS5_PBKDF2_HMAC", crypto.createCipher is deprecated by nodejs. Therefore, to avoid this library to use deprecated nodejs API by default, the behavior of options.iv == null now is to use crypto.createCipheriv with an empty iv to create the cipher which, however, is incompatible with the cipher created by crypto.createCipher.

first release on github

v1.0.0

update reademe