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Re: [iaik-jce] Problem in constructing SignedData object



If you read the ASN.1 standards, an INTEGER object
cannot be null, meaning if its value encoding is
0(zero), it still has to contain a byte for zero.  

Some ASN.1 encoders, VeriSign for one, encodes a 0
INTEGER object as a null value.  IAIK ASN.1 parser
does not allow this, and it should not allow this
according to the specs.

OpenSSL can parse null INTEGERS.  Use OpenSSL to do an
ASN1 text dump, then look for an INTEGER object
followed by a 0(zero) sized object.  If this is the
case, then Microsoft is not encoding the ASN.1 object
correctly.  If all INTEGERS are correct according to
the OpenSSL text dump, then my assumption is
incorrect, and I'm not sure what is wrong.

Hope this helps,
Hu

--- Ramana <ramana@vsofti.stph.net> wrote:
> Hi,
> 
> I am trying to construct a SignedData object from
> the content received
> from Outlook Expressed signed mail and i am getting
> the error
> 
> java.io.IOException: Next ASN.1 object is no
> INTEGER!
>         at
> iaik.asn1.DerInputStream.readInteger(Unknown Source)
>         at
> iaik.pkcs.pkcs7.SignedDataStream.decode(Unknown
> Source)
>         at
> iaik.pkcs.pkcs7.SignedDataStream.<init>(Unknown
> Source)
>         at signednew.main(signednew.java:84)
> 
> 
> The code i am trying to execute is
> 
>         FileInputStream fis = new
> FileInputStream("enctemp.txt");
>         FileOutputStream fos = new
> FileOutputStream("temp1.txt");
> 
>         byte[] bt= new byte[fis.available()];
>         fis.read(bt);
> 
>        fos.write(Util.Base64Decode(bt));
>        fos.close();
> 
>        FileInputStream fis2 = new
> FileInputStream("temp1.txt");
>        ContentInfoStream cis2 = new
> ContentInfoStream(fis2);
> 
>       ASN1Object asn = cis2.toASN1Object();
>       SignedData sData = new SignedData(asn);  (
> Error occuring in this
> line )
>       -------
>       -------
> 
>       enctemp.txt file contains the text obtained
> from signed mail
> obtained from Outlook mail.
>       The text in the file is pasted below
> 
> 
>
MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIEWTCCAg0w
> 
>
ggG3AgEBMA0GCSqGSIb3DQEBBAUAMIGsMQswCQYDVQQGEwJJTjEXMBUGA1UECBMOQW5kaHJhIFBy
> 
>
YWRlc2gxEjAQBgNVBAcTCUh5ZGVyYWJhZDEkMCIGA1UEChMbVmlzdWFsU29mdCBUZWNobm9sb2dp
> 
>
ZXMgTHRkMREwDwYDVQQLEwhWaVNlY3VyZTETMBEGA1UEAxMKVmlzdWFsU29mdDEiMCAGCSqGSIb3
> 
>
DQEJARYTYnJrQHZzb2Z0aS5zdHBoLm5ldDAeFw0wMDA0MDExMDIyMTFaFw0wMDA3MTAxMDIyMTFa
> 
>
MHYxCzAJBgNVBAYTAklOMQswCQYDVQQIEwJBcDENMAsGA1UEChMEVlNUTDERMA8GA1UECxMIVmlT
> 
>
ZWN1cmUxFDASBgNVBAMTC1JhdmlrcmlzaG5hMSIwIAYJKoZIhvcNAQkBFhNicmtAdnNvZnRpLnN0
> 
>
cGgubmV0MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAKb7fno7hM+WW7FrX5iTXgoDlUhKrmFS3m8S
> 
>
f3GEw/CRIplcuH94PLXCd3AYMzEVxb0qOKibmPm8+c/699EdV3kCAwEAATANBgkqhkiG9w0BAQQF
> 
>
AANBAFX/kw5FLLSZi+UHxcBgMgqS+kJWuS0ntx047UfVKp4IDxpyYrheG00/avg1qus+Tr6JfW+F
> 
>
KFY8/HsXjk/HvaYwggJEMIIB7gIBADANBgkqhkiG9w0BAQQFADCBrDELMAkGA1UEBhMCSU4xFzAV
> 
>
BgNVBAgTDkFuZGhyYSBQcmFkZXNoMRIwEAYDVQQHEwlIeWRlcmFiYWQxJDAiBgNVBAoTG1Zpc3Vh
> 
>
bFNvZnQgVGVjaG5vbG9naWVzIEx0ZDERMA8GA1UECxMIVmlTZWN1cmUxEzARBgNVBAMTClZpc3Vh
> 
>
bFNvZnQxIjAgBgkqhkiG9w0BCQEWE2Jya0B2c29mdGkuc3RwaC5uZXQwHhcNMDAwNDAxMTAxNjEw
> 
>
WhcNMDEwNDAxMTAxNjEwWjCBrDELMAkGA1UEBhMCSU4xFzAVBgNVBAgTDkFuZGhyYSBQcmFkZXNo
> 
>
MRIwEAYDVQQHEwlIeWRlcmFiYWQxJDAiBgNVBAoTG1Zpc3VhbFNvZnQgVGVjaG5vbG9naWVzIEx0
> 
>
ZDERMA8GA1UECxMIVmlTZWN1cmUxEzARBgNVBAMTClZpc3VhbFNvZnQxIjAgBgkqhkiG9w0BCQEW
> 
>
E2Jya0B2c29mdGkuc3RwaC5uZXQwXDANBgkqhkiG9w0BAQEFAANLADBIAkEAs4kT5bA99ZkZvvg9
> 
>
hQNBGG8xt8IdYj9kpvjk2x8++4kP8sRH6uGd6a6vZjerIcJKEezAXWO9jnQZ7Xxq9mklZQIDAQAB
> 
>
MA0GCSqGSIb3DQEBBAUAA0EALO48prEKIH+IF9DavjdRSEb53Y2g4wEbKOC70P1YzdRKEKGVrXnY
> 
>
hIwQJQGphMxVne3n0SJpEJVrrYHienqeazGCAZcwggGTAgEBMIGyMIGsMQswCQYDVQQGEwJJTjEX
> 
>
MBUGA1UECBMOQW5kaHJhIFByYWRlc2gxEjAQBgNVBAcTCUh5ZGVyYWJhZDEkMCIGA1UEChMbVmlz
> 
>
dWFsU29mdCBUZWNobm9sb2dpZXMgTHRkMREwDwYDVQQLEwhWaVNlY3VyZTETMBEGA1UEAxMKVmlz
> 
>
dWFsU29mdDEiMCAGCSqGSIb3DQEJARYTYnJrQHZzb2Z0aS5zdHBoLm5ldAIBATAJBgUrDgMCGgUA
> 
>
oH0wGAYJKoZIhvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMDAwNjI0MDkyMjMz
> 
>
WjAeBgkqhkiG9w0BCQ8xETAPMA0GCCqGSIb3DQMCAgEoMCMGCSqGSIb3DQEJBDEWBBQPwpnCpS/R
> 
>
xOTYuabEYmz9K8wenTANBgkqhkiG9w0BAQEFAARAGpP6RvtI8jKAjsUiTD3vbHDeO98F3mjWam6V
> 
>
red4bTvbBiVPrhZOGARrFD9mrhWHYI16TnIhmJHgwFl5T8wvGQAAAAAAAA==
> 
> 
> I am not able to resolve this error even after going
> thru documentation
> and mailing archieve.
> 
> Any help would greatly help me to complete my
> project in time.
> 
> I am using IAIK-JCE 2.51 version.
> 
> regards,
> Ramana.
> 
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