func SignatureFromHeaders(signatureHeader, metadataHeader string, crypto secure.Crypto) (Signature, error) {
metadata := Metadata{}
signature := Signature{}
if metadataHeader == "" {
return signature, errors.New("No metadata found")
}
metadataDecoded, err := base64.URLEncoding.DecodeString(metadataHeader)
if err != nil {
return signature, err
}
err = json.Unmarshal(metadataDecoded, &metadata)
signatureDecoded, err := base64.URLEncoding.DecodeString(signatureHeader)
if err != nil {
return signature, err
}
signatureDecrypted, err := crypto.Decrypt(signatureDecoded, metadata.Nonce)
if err != nil {
return signature, err
}
err = json.Unmarshal([]byte(signatureDecrypted), &signature)
return signature, err
}
