luzifer/go-openssl
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Signed-off-by: Knut Ahlers <knut@ahlers.me>
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Knut Ahlers 2018-09-11 11:39:05 +02:00
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[![](https://badges.fyi/static/godoc/reference/5272B4)](https://godoc.org/github.com/Luzifer/go-openssl)
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# Luzifer / go-openssl
`go-openssl` is a small library wrapping the `crypto/aes` functions in a way the output is compatible to OpenSSL / CryptoJS. For all encryption / decryption processes AES256 is used so this library will not be able to decrypt messages generated with other than `openssl aes-256-cbc`. If you're using CryptoJS to process the data you also need to use AES256 on that side.
## OpenSSL 1.1.0
## OpenSSL 1.1.0c compatibility
With the release of OpenSSL 1.1.0c the default hashing algorithm [changed from `md5` to `sha256`](https://www.cryptopp.com/wiki/OPENSSL_EVP_BytesToKey). Using this new default breaks the en- and decryption used in this library. Currently you need to specify to use `md5` hashing when encrypting using `openssl enc -aes-256-cbc -a -k yourpassword -md md5`. Sadly using `sha256` is not a drop-in replacement and therefore needs to be implemented as a separate function following the OpenSSL source code.
Starting with `v2.0.0` `go-openssl` generates the encryption keys using `sha256sum` algorithm. This is the default introduced in OpenSSL 1.1.0c. When encrypting data you can choose which digest method to use and therefore also continue to use `md5sum`. When decrypting OpenSSL encrypted data `md5sum`, `sha1sum` and `sha256sum` are supported.
## Installation
@ -49,14 +55,14 @@ import (
func main() {
opensslEncrypted := "U2FsdGVkX19ZM5qQJGe/d5A/4pccgH+arBGTp+QnWPU="
passphrase := "z4yH36a6zerhfE5427ZV"
passphrase := "z4yH36a6zerhfE5427ZV"
o := openssl.New()
o := openssl.New()
dec, err := o.DecryptString(passphrase, opensslEncrypted)
if err != nil {
fmt.Printf("An error occurred: %s\n", err)
}
dec, err := o.DecryptString(passphrase, opensslEncrypted)
if err != nil {
fmt.Printf("An error occurred: %s\n", err)
}
fmt.Printf("Decrypted text: %s\n", string(dec))
}