79 lines
2.5 KiB
Go
79 lines
2.5 KiB
Go
|
package app
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/aes"
|
||
|
|
"crypto/cipher"
|
||
|
|
"crypto/rand"
|
||
|
|
"crypto/sha256"
|
||
|
|
"encoding/base64"
|
||
|
|
"fmt"
|
||
|
|
"io"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
const enterpriseSiteCredentialPrefix = "v1:"
|
||
|
|
|
||
|
|
func encryptEnterpriseSiteCredential(secret string, keyMaterial string) (string, error) {
|
||
|
|
secret = strings.TrimSpace(secret)
|
||
|
|
if secret == "" {
|
||
|
|
return "", fmt.Errorf("enterprise site credential is empty")
|
||
|
|
}
|
||
|
|
key := enterpriseSiteCredentialKey(keyMaterial)
|
||
|
|
block, err := aes.NewCipher(key[:])
|
||
|
|
if err != nil {
|
||
|
|
return "", fmt.Errorf("create enterprise site credential cipher: %w", err)
|
||
|
|
}
|
||
|
|
aead, err := cipher.NewGCM(block)
|
||
|
|
if err != nil {
|
||
|
|
return "", fmt.Errorf("create enterprise site credential gcm: %w", err)
|
||
|
|
}
|
||
|
|
nonce := make([]byte, aead.NonceSize())
|
||
|
|
if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
|
||
|
|
return "", fmt.Errorf("generate enterprise site credential nonce: %w", err)
|
||
|
|
}
|
||
|
|
ciphertext := aead.Seal(nil, nonce, []byte(secret), nil)
|
||
|
|
packed := append(nonce, ciphertext...)
|
||
|
|
return enterpriseSiteCredentialPrefix + base64.StdEncoding.EncodeToString(packed), nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func decryptEnterpriseSiteCredential(ciphertext string, keyMaterial string) (string, error) {
|
||
|
|
ciphertext = strings.TrimSpace(ciphertext)
|
||
|
|
if ciphertext == "" {
|
||
|
|
return "", fmt.Errorf("enterprise site credential ciphertext is empty")
|
||
|
|
}
|
||
|
|
if !strings.HasPrefix(ciphertext, enterpriseSiteCredentialPrefix) {
|
||
|
|
return "", fmt.Errorf("unsupported enterprise site credential format")
|
||
|
|
}
|
||
|
|
raw, err := base64.StdEncoding.DecodeString(strings.TrimPrefix(ciphertext, enterpriseSiteCredentialPrefix))
|
||
|
|
if err != nil {
|
||
|
|
return "", fmt.Errorf("decode enterprise site credential: %w", err)
|
||
|
|
}
|
||
|
|
key := enterpriseSiteCredentialKey(keyMaterial)
|
||
|
|
block, err := aes.NewCipher(key[:])
|
||
|
|
if err != nil {
|
||
|
|
return "", fmt.Errorf("create enterprise site credential cipher: %w", err)
|
||
|
|
}
|
||
|
|
aead, err := cipher.NewGCM(block)
|
||
|
|
if err != nil {
|
||
|
|
return "", fmt.Errorf("create enterprise site credential gcm: %w", err)
|
||
|
|
}
|
||
|
|
if len(raw) <= aead.NonceSize() {
|
||
|
|
return "", fmt.Errorf("enterprise site credential payload is invalid")
|
||
|
|
}
|
||
|
|
nonce := raw[:aead.NonceSize()]
|
||
|
|
encrypted := raw[aead.NonceSize():]
|
||
|
|
plaintext, err := aead.Open(nil, nonce, encrypted, nil)
|
||
|
|
if err != nil {
|
||
|
|
return "", fmt.Errorf("decrypt enterprise site credential: %w", err)
|
||
|
|
}
|
||
|
|
return string(plaintext), nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func enterpriseSiteCredentialKey(keyMaterial string) [32]byte {
|
||
|
|
trimmed := strings.TrimSpace(keyMaterial)
|
||
|
|
if trimmed == "" {
|
||
|
|
trimmed = "geo-rankly-enterprise-site-development-key"
|
||
|
|
}
|
||
|
|
return sha256.Sum256([]byte("enterprise-site-credential:" + trimmed))
|
||
|
|
}
|