Adding function to generate final signature value

alexandru-ionut-balan · Apr 28, 2023 · d9df615 · d9df615
1 parent 32e18e5
commit d9df615
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Showing 2 changed files with 18 additions and 2 deletions.
diff --git a/crypto/crypto.go b/crypto/crypto.go
@@ -48,7 +48,7 @@ func Sign(payload string, privateKey *rsa.PrivateKey) ([]byte, error) {
 
 	signedPayload, err := rsa.SignPKCS1v15(rand.Reader, privateKey, crypto.SHA256, hashedPayload)
 	if err != nil {
-		logging.Error("Cannot sign message. Signign with private key failed!", err)
+		logging.Error("Cannot sign message. Signign with private key failed!", nil)
 		return nil, err
 	}
 

diff --git a/jws/signature.go b/jws/signature.go
@@ -9,7 +9,7 @@ import (
 	"github.com/alexandru-ionut-balan/ing-jws/util"
 )
 
-func generateHeader(jwsHeader *JwsHeader) (string, error) {
+func generateEncodedHeader(jwsHeader *JwsHeader) (string, error) {
 	rawHeaderBytes, err := json.Marshal(jwsHeader)
 	if err != nil {
 		logging.Error("Cannot marshal JWS Header into JSON.", nil)
@@ -34,3 +34,19 @@ func generateSignatureValue(encodedJwsHeader string, httpHeaders []util.HttpHead
 
 	return crypto.Base64(signedInput), nil
 }
+
+func GenerateSignature(jwsHeader *JwsHeader, httpHeaders []util.HttpHeader, privateKey *rsa.PrivateKey) (string, error) {
+	encodedHeader, err := generateEncodedHeader(jwsHeader)
+	if err != nil {
+		logging.Error("Cannot create signature!", nil)
+		return "", err
+	}
+
+	signatureValue, err := generateSignatureValue(encodedHeader, httpHeaders, privateKey)
+	if err != nil {
+		logging.Error("Cannot create signature!", nil)
+		return "", err
+	}
+
+	return encodedHeader + ".." + signatureValue, nil
+}