DigitalSignatureCollection GetDigitalSignatures (PgpSignatureList signatureList, Stream content)
{
var signatures = new List<IDigitalSignature> ();
var buf = new byte[4096];
int nread;
for (int i = 0; i < signatureList.Count; i++) {
var pubkey = PublicKeyRingBundle.GetPublicKey (signatureList[i].KeyId);
var signature = new OpenPgpDigitalSignature (pubkey, signatureList[i]) {
PublicKeyAlgorithm = GetPublicKeyAlgorithm (signatureList[i].KeyAlgorithm),
DigestAlgorithm = GetDigestAlgorithm (signatureList[i].HashAlgorithm),
CreationDate = signatureList[i].CreationTime,
};
if (pubkey != null)
signatureList[i].InitVerify (pubkey);
signatures.Add (signature);
}
var memory = content as MemoryStream;
if (memory != null) {
// We can optimize things a bit if we've got a memory stream...
var buffer = memory.GetBuffer ();
for (int index = (int) memory.Position; index < (int) memory.Length; index++) {
byte c = buffer[index];
for (int i = 0; i < signatures.Count; i++) {
if (signatures[i].SignerCertificate != null) {
var pgp = (OpenPgpDigitalSignature) signatures[i];
pgp.Signature.Update (c);
}
}
}
} else {
while ((nread = content.Read (buf, 0, buf.Length)) > 0) {
for (int i = 0; i < signatures.Count; i++) {
if (signatures[i].SignerCertificate != null) {
var pgp = (OpenPgpDigitalSignature) signatures[i];
pgp.Signature.Update (buf, 0, nread);
}
}
}
}
return new DigitalSignatureCollection (signatures);
}
DigitalSignatureCollection GetDigitalSignatures (PgpSignatureList signatureList, Stream content)
{
var signatures = new List<IDigitalSignature> ();
var buf = new byte[4096];
int nread;
for (int i = 0; i < signatureList.Count; i++) {
var pubkey = PublicKeyRingBundle.GetPublicKey (signatureList[i].KeyId);
var signature = new OpenPgpDigitalSignature (pubkey, signatureList[i]) {
PublicKeyAlgorithm = GetPublicKeyAlgorithm (signatureList[i].KeyAlgorithm),
DigestAlgorithm = GetDigestAlgorithm (signatureList[i].HashAlgorithm),
CreationDate = signatureList[i].CreationTime,
};
if (pubkey != null)
signatureList[i].InitVerify (pubkey);
signatures.Add (signature);
}
while ((nread = content.Read (buf, 0, buf.Length)) > 0) {
for (int i = 0; i < signatures.Count; i++) {
if (signatures[i].SignerCertificate != null) {
var pgp = (OpenPgpDigitalSignature) signatures[i];
pgp.Signature.Update (buf, 0, nread);
}
}
}
return new DigitalSignatureCollection (signatures);
}