RE: [Bulk] Re: [Bulk] Re: [xmlsec] ErrorsCallback ???
Hi Aleksey, Thanks once again. The following worked when added to the ErrorsCallback (mscrypto only) ... errCode = win32api.GetLastError() errMsg = win32api.FormatMessage(errCode) Ed -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Edward Shallow Sent: January 6, 2006 12:07 PM To: xmlsec@aleksey.com Subject: RE: [Bulk] Re: [Bulk] Re: [xmlsec] ErrorsCallback ??? Oh I see. You mean the Windows Win32::GetLastError() call. I do not mind trying this as a work-around. I'll let you know. I think the ideal would be to normalize the error handling as you suggested. Thanks, Ed -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Aleksey Sanin Sent: January 6, 2006 12:00 PM To: [EMAIL PROTECTED] Cc: xmlsec@aleksey.com Subject: [Bulk] Re: [Bulk] Re: [xmlsec] ErrorsCallback ??? > The xmlGetLastError seemed very attractive and it does work perfectly > for all libxml2 calls and returns output which is identical to stderr. The message on std err from xmlsec is printed by LibXML2. I can not test it on Windows at the moment, but I can get back all this information using xmlGetLastError() on Linux. As I wrote you before, the "extra" information you see is provided from *system* GetLasstError() call. You can make same call from python inside your error callback. Aleksey ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec
RE: [Bulk] Re: [Bulk] Re: [xmlsec] ErrorsCallback ???
Oh I see. You mean the Windows Win32::GetLastError() call. I do not mind trying this as a work-around. I'll let you know. I think the ideal would be to normalize the error handling as you suggested. Thanks, Ed -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Aleksey Sanin Sent: January 6, 2006 12:00 PM To: [EMAIL PROTECTED] Cc: xmlsec@aleksey.com Subject: [Bulk] Re: [Bulk] Re: [xmlsec] ErrorsCallback ??? > The xmlGetLastError seemed very attractive and it does work perfectly > for all libxml2 calls and returns output which is identical to stderr. The message on std err from xmlsec is printed by LibXML2. I can not test it on Windows at the moment, but I can get back all this information using xmlGetLastError() on Linux. As I wrote you before, the "extra" information you see is provided from *system* GetLasstError() call. You can make same call from python inside your error callback. Aleksey ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec
Re: [Bulk] Re: [xmlsec] ErrorsCallback ???
The xmlGetLastError seemed very attractive and it does work perfectly for all libxml2 calls and returns output which is identical to stderr. The message on std err from xmlsec is printed by LibXML2. I can not test it on Windows at the moment, but I can get back all this information using xmlGetLastError() on Linux. As I wrote you before, the "extra" information you see is provided from *system* GetLasstError() call. You can make same call from python inside your error callback. Aleksey ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec
RE: [Bulk] Re: [Bulk] Re: [xmlsec] ErrorsCallback ???
Hi Aleksey, Yes that is correct. When I do "not" set the callback, I get verbose error messages on stderr. I never see the specific "error msg=The specified network password is not correct" coming to the callback. The callback when it does receive a msg is not as verbose as what goes to stderr. See output examples from my previous post. 6 out of the 7 arguments work perfectly all the time, it is just the last argument i.e. msg that is inconsistent. No ErrorsCallback set * func=xmlSecMSCryptoAppPkcs12LoadMemory:file=..\src\mscrypto\app.c:line=614:o bj=unknown:subj=PFXVerifyPassword:error=4:crypto library function failed: ;last error=86 (0x0056);last error msg=The specified network password is not correct. func=xmlSecMSCryptoAppPkcs12Load:file=..\src\mscrypto\app.c:line=522:obj=unk nown:subj=xmlSecMSCryptoAppPkcs12LoadMemory:error=1:xmlsec library function failed: ;last error=86 (0x0056);last error msg=The specified network password is not correct. func=xmlSecMSCryptoAppKeyLoad:file=..\src\mscrypto\app.c:line=128:obj=unknow n:subj=xmlSecMSCryptoAppPkcs12Load:error=1:xmlsec library function failed: ;last error=86 (0x0056);last error msg=The specified network password is not correct. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Aleksey Sanin Sent: January 5, 2006 11:43 PM To: [EMAIL PROTECTED] Cc: xmlsec@aleksey.com Subject: [Bulk] Re: [Bulk] Re: [xmlsec] ErrorsCallback ??? Do you see the error message on stderr? Aleksey Edward Shallow wrote: > PostScript ... > > A call to the following works fine after any libxml2 function > throwing an error. I tried it after a failed xmlsec function call and > received nothing (i.e. Python None aka NULL) > > Ed > ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec
RE: [Bulk] Re: [xmlsec] ErrorsCallback ???
Thanks for your patience, All I would like to do is trap the most informative message in whatever way works, I am not fussy. In this simple password example it would be "The specified network password is not correct" message. Neither of 1) setting ErrorsCallback or 2) using xmlGetLastError is working for me. This is true of both openssl and mscrypto. With the ErrorsCallback set, mscrypto returns nothing in the msg argument, and openssl returns the offending p12 file name. I think it makes sense to get back the more informative "The specified network password is not correct" message. The best would be to get at this "most informative" msg which always goes to stderr perfectly, but can't be trappped in any easy way programmatically. The xmlGetLastError seemed very attractive and it does work perfectly for all libxml2 calls and returns output which is identical to stderr. Hope this helps, Ed -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Aleksey Sanin Sent: January 6, 2006 12:01 AM To: [EMAIL PROTECTED] Cc: xmlsec@aleksey.com Subject: [Bulk] Re: [xmlsec] ErrorsCallback ??? Ed, I think I found the reason for your confusion. In the first email in this thread you gave several example for MSCrypto error messages with and without errors callback set. I'll pick one of them and will explain the problem: mscrypto epmErrorCallback xmlsec error follows: file..\src\mscrypto\app.c line614 funcxmlSecMSCryptoAppPkcs12LoadMemory errorObject None errorSubjectPFXVerifyPassword reason 4 msg No ErrorsCallback set * func=xmlSecMSCryptoAppPkcs12LoadMemory:file=..\src\mscrypto\app.c:line=614:o bj=unknown:subj=PFXVerifyPassword:error=4:crypto library function failed: ;last error=86 (0x0056);last error msg=The specified network password is not correct. The 'msg' you see in the first case (with epmErrorsCallback) is provided by the xmlsec-mscrypto (or xmlsec-openssl) author. If you go to the corresponding file, you'll see that there is *no* message provided in this case thus you observe correct results. The messages you see in the second case (no custom ErrorsCallback) are created by xmlSecMSCryptoErrorsDefaultCallback() function which is *the* default errors callback when xmlsec-mscrypto is used (yes, it is a little bit confusing :( ). This function simply calls Windows GetLastError() and FormatMessage() to generate the "last error=86 (0x0056);last error msg=The specified network password is not correct." message and append it to *all* error messages. I agree, this is confusing but the system does what it was written to do. May be a better approach would be to move this "extra" xmlSecMSCryptoErrorsDefaultCallback() functionality into the generic xmlSecErrorsDefaultCallback() and just ifdef it for Windows only. Then the output will be consistent between different crypto libraries. Aleksey ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec
Re: [Bulk] Re: [xmlsec] ErrorsCallback ???
Do you see the error message on stderr? Aleksey Edward Shallow wrote: PostScript ... A call to the following works fine after any libxml2 function throwing an error. I tried it after a failed xmlsec function call and received nothing (i.e. Python None aka NULL) Ed ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec
RE: [Bulk] Re: [xmlsec] ErrorsCallback ???
PostScript ... A call to the following works fine after any libxml2 function throwing an error. I tried it after a failed xmlsec function call and received nothing (i.e. Python None aka NULL) Ed errMsg = self.checkLibxml2Error() ... def checkLibxml2Error(self): libxml2 = self.env.libxml2 errMsg = None errorPtr = libxml2.xmlGetLastError() if errorPtr != 0: try: error = xmlError.from_address(errorPtr) # set up pointer to a libxml2 xmlError structure errMsg = 'level ' + str(error.level) + ' error in domain ' + str(error.domain) + ' code ' + str(error.code) + error.message, ' at line ' + str(error.line) except: errMsg = 'Fatal error in xmlGetLastError function' return errMsg -Original Message- From: Edward Shallow [mailto:[EMAIL PROTECTED] Sent: January 5, 2006 11:02 PM To: 'Aleksey Sanin' Subject: RE: [Bulk] Re: [xmlsec] ErrorsCallback ??? Re 2, Yes that sounds good !!! I'll try the xmlGetLastError support for xmlsec as well. I am already using it for libxml2 parsing errors. Re 1, Yes I am using Python with the ctypes module to directly access libxml2 and xmlsec. I can set the breakpoint on Linux but my problem is mscrypto and on Windows I am using Igor's binaries. I have never compiled under Windows, don't have the patience or the software. I doubt there is a coding problem as everything is coming back for openssl and sometimes is coming back for mscrypto (Verify calls) Ed -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Aleksey Sanin Sent: January 5, 2006 7:51 PM To: [EMAIL PROTECTED] Cc: xmlsec@aleksey.com Subject: [Bulk] Re: [xmlsec] ErrorsCallback ??? 1) Are you using xmlsec directly or via python? If you have C/C++ app, simply set a breakpoint in the error callback and then trace it back to the error origin. You'll see the exact place where NULL shows up. 2) The default callback sets the reported error in to libxml2 thus you can use xmlGetLastError() directly. If you have a custom callback then you can do similar thing yourself. Aleksey ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec ___ xmlsec mailing list xmlsec@aleksey.com http://www.aleksey.com/mailman/listinfo/xmlsec
