BG created JDKIM-42:
-----------------------
Summary: Example on how to use verify bh in DKIM
Key: JDKIM-42
URL: https://issues.apache.org/jira/browse/JDKIM-42
Project: James jDKIM
Issue Type: Question
Reporter: BG
Trying to verify the DKIM bh value for an email using verify method from tests.
{{protected static List<SignatureRecord> verify(DKIMVerifier verifier,
MimeMessage message, boolean forceCRLF)
throws MessagingException, FailException {
Headers headers = new MimeMessageHeaders(message);
BodyHasher bh = verifier.newBodyHasher(headers);
try {
if (bh != null) {
OutputStream os = new HeaderSkippingOutputStream(bh
.getOutputStream());
if (forceCRLF) os = new CRLFOutputStream(os);
message.writeTo(os);
bh.getOutputStream().close();
}
} catch (IOException e) {
throw new MessagingException("Exception calculating bodyhash: "
+ e.getMessage(), e);
}
return verifier.verify(bh);
}}}
Created DKIMVerifier with a PublicKeyRecordRetriever. Call verify method with
following:
{{verify(new DKIMVerifier(pkr), new MimeMessage(Session.getDefaultInstance(new
Properties()), new ByteArrayInputStream(str.getBytes())), false);}}
str is a String with all of the source (headers and content) of an email.
verify throws error "Header signature does not verify" from line with
"BodyHasher bh = verifier.newBodyHasher(headers);".
The only place in codebase where DKIMVerify.verify is used is in DKIMSignTest
which uses a MockPublicKeyRecordRetriever.
What is incorrect with implementation?
Thanks.
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