84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
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package utils
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"encoding/base64"
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"io"
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"github.com/authorizerdev/authorizer/server/constants"
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)
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func EncryptB64(text string) string {
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return base64.StdEncoding.EncodeToString([]byte(text))
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}
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func DecryptB64(s string) (string, error) {
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data, err := base64.StdEncoding.DecodeString(s)
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if err != nil {
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return "", err
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}
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return string(data), nil
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}
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func EncryptAES(text []byte) ([]byte, error) {
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key := []byte(constants.EnvData.ENCRYPTION_KEY)
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c, err := aes.NewCipher(key)
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var res []byte
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if err != nil {
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return res, err
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}
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// gcm or Galois/Counter Mode, is a mode of operation
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// for symmetric key cryptographic block ciphers
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// - https://en.wikipedia.org/wiki/Galois/Counter_Mode
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gcm, err := cipher.NewGCM(c)
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if err != nil {
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return res, err
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}
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// creates a new byte array the size of the nonce
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// which must be passed to Seal
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nonce := make([]byte, gcm.NonceSize())
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// populates our nonce with a cryptographically secure
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// random sequence
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if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
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return res, err
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}
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// here we encrypt our text using the Seal function
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// Seal encrypts and authenticates plaintext, authenticates the
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// additional data and appends the result to dst, returning the updated
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// slice. The nonce must be NonceSize() bytes long and unique for all
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// time, for a given key.
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return gcm.Seal(nonce, nonce, text, nil), nil
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}
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func DecryptAES(ciphertext []byte) ([]byte, error) {
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key := []byte(constants.EnvData.ENCRYPTION_KEY)
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c, err := aes.NewCipher(key)
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var res []byte
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if err != nil {
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return res, err
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}
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gcm, err := cipher.NewGCM(c)
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if err != nil {
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return res, err
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}
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nonceSize := gcm.NonceSize()
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if len(ciphertext) < nonceSize {
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return res, err
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}
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nonce, ciphertext := ciphertext[:nonceSize], ciphertext[nonceSize:]
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plaintext, err := gcm.Open(nil, nonce, ciphertext, nil)
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if err != nil {
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return res, err
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}
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return plaintext, nil
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}
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