Pkcs7SignerInfo constructor
Pkcs7SignerInfo(
- ASN1Sequence asn1
parse a Pkcs7 message signature
Implementation
factory Pkcs7SignerInfo(ASN1Sequence asn1) {
ASN1Object? signedAttrs;
ASN1Sequence? signatureAlgorithm;
ASN1OctetString? signature;
ASN1Object? unsignedAttrs;
for (final e in asn1.elements!.sublist(3)) {
if (e.tag == 0xa0) {
signedAttrs = e;
} else if (e.tag == 0xa1) {
unsignedAttrs = e;
} else if (e is ASN1Sequence) {
signatureAlgorithm = e;
} else if (e is ASN1OctetString) {
signature = e;
}
}
return Pkcs7SignerInfo._(
asn1,
signedAttrs,
signatureAlgorithm!,
signature!,
unsignedAttrs,
);
}