mirror of
https://github.com/Luzifer/go-openssl.git
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89 lines
2.9 KiB
Markdown
89 lines
2.9 KiB
Markdown
[](https://godoc.org/github.com/Luzifer/go-openssl)
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[](https://goreportcard.com/report/github.com/Luzifer/go-openssl)
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[](https://travis-ci.org/Luzifer/go-openssl)
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# Luzifer / go-openssl
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`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.
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## Version support
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For this library only the latest major version is supported. All prior major versions should no longer be used.
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The versioning is following [SemVer](https://semver.org/) which means upgrading to a newer major version will break your code!
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## OpenSSL compatibility
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### 1.1.0c
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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.
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### 1.1.1
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The PBKDF2 key derivation is not yet supported.
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## Installation
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```bash
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# Get the latest version
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go get github.com/Luzifer/go-openssl
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# OR get a specific version
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go get gopkg.in/Luzifer/go-openssl.v3
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```
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## Usage example
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The usage is quite simple as you don't need any special knowledge about OpenSSL and/or AES256:
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### Encrypt
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```go
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import (
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"fmt"
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openssl "gopkg.in/Luzifer/go-openssl.v3"
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)
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func main() {
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plaintext := "Hello World!"
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passphrase := "z4yH36a6zerhfE5427ZV"
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o := openssl.New()
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enc, err := o.EncryptBytes(passphrase, []byte(plaintext), DigestSHA256Sum)
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if err != nil {
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fmt.Printf("An error occurred: %s\n", err)
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}
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fmt.Printf("Encrypted text: %s\n", string(enc))
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}
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```
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### Decrypt
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```go
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import (
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"fmt"
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openssl "gopkg.in/Luzifer/go-openssl.v3"
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)
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func main() {
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opensslEncrypted := "U2FsdGVkX19ZM5qQJGe/d5A/4pccgH+arBGTp+QnWPU="
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passphrase := "z4yH36a6zerhfE5427ZV"
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o := openssl.New()
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dec, err := o.DecryptBytes(passphrase, []byte(opensslEncrypted), DigestMD5Sum)
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if err != nil {
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fmt.Printf("An error occurred: %s\n", err)
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}
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fmt.Printf("Decrypted text: %s\n", string(dec))
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}
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```
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## Testing
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To execute the tests for this library you need to be on a system having `/bin/bash` and `openssl` available as the compatibility of the output is tested directly against the `openssl` binary. The library itself should be usable on all operating systems supported by Go and `crypto/aes`.
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