Detached signature content-type oid does not match actual content-type

[dawud-tan]

// Detach removes content from the signed data struct to make it a detached signature.
// This must be called right before Finish()
func (sd *SignedData) Detach() {
	sd.sd.ContentInfo = contentInfo{ContentType: oidSignedData}
}

Is pkcs7.go's Detach function, do cause mismatch Content-Type according to RFC 3852 Section 11.1?

following is my code line hello.go line 108, it will send a response to my android app that use bouncycastle lib, the lib throws following error new CMSException("content-type attribute value does not match eContentType");, it check this if (!signedContentType.equals(contentType))

the Content-Type of the following openssl smime v3.1 detached signature command line tool:
openssl cms -sign -md sha1 -noattr -signer public.crt -inkey public.key -in PO.edifact -out signedPO.edifact, is 1.2.840.113549.1.7.1, while your detached function is 1.2.840.113549.1.7.2

following is the sample of the above hello.go's http response

------=_Part_zBgVxyST
Content-Type: multipart/report; report-type=disposition-notification; 
	boundary="----=_Part_NXmQfJcR"

------=_Part_NXmQfJcR
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

The AS2 message has been received.
------=_Part_NXmQfJcR
Content-Type: message/disposition-notification
Content-Transfer-Encoding: 7bit

Reporting-UA: php AS2 Server
Original-Recipient: rfc822; mendelsontestAS2
Final-Recipient: rfc822; mendelsontestAS2
Original-Message-ID: <github-dawud-tan-RetrofitSmime-30122017110750+0700--380012012302437852@mycompanyAS2_mendelsontestAS2>
Disposition: automatic-action/MDN-sent-automatically; processed
Received-Content-MIC: PAitTZmshnYdaYVQ5aYyf/cEJiE=, sha1

------=_Part_NXmQfJcR--

------=_Part_zBgVxyST
Content-Type: application/pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7s"

MIIExwYJKoZIhvcNAQcCoIIEuDCCBLQCAQExCTAHBgUrDgMCGjALBgkqhkiG9w0B
BwKgggLUMIIC0DCCAjkCBEOO/fMwDQYJKoZIhvcNAQEFBQAwga4xJjAkBgkqhkiG
9w0BCQEWF3Jvc2V0dGFuZXRAbWVuZGVsc29uLmRlMQswCQYDVQQGEwJERTEPMA0G
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IEdtYkgxDTALBgNVBAMTBG1lbmQwHhcNMDUxMjAxMTM0MzE1WhcNMTkwODEwMTM0
MzE1WjCBrjEmMCQGCSqGSIb3DQEJARYXcm9zZXR0YW5ldEBtZW5kZWxzb24uZGUx
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------=_Part_zBgVxyST--