[PYTHON-CRYPTO] m2crypto-0.13 problem

[G Dang]

Hi,

Don't know if you've resolved your issue yet...

I've ran into a similar problem, with the SMIME.smime_load_pkcs* routimes.
Drove me nuts for awhile.  The problem was within the OpenSSL code, but
the darn SystemError wasn't being very helpful.  A simple patch for the
2 routines:

    -p7_ptr, bio_ptr = m2.smime_read_pkcs7(bio)
    +try:
    +    p7_ptr = None
    +    bio_ptr = None
    +    p7_ptr, bio_ptr = m2.smime_read_pkcs7(bio) # or (p7_bio.ptr())
    +except SystemError, e:
    +    pass

will let the Err.get_error() handler does its job in backtracking where
the problem could be.  In my case, it turns out to be somewhere in the
OpenSSL \crypto\pkcs7 modules -- someone merged broken codes into the
ver 97d.  I had to go through the change logs and CVS to grab back
revision I needed.

BTW, your .eml file still generated errors, something to do with the
base64 decoding, the SMIME_read_PKCS7 calls tries to read and return
a BIO, along the the P7 pointer.  The SMIME.smime_load_pkcs() call
did not return a BIO (None).  Your encoded message could be bad? (or
outstanding issue with OpenSSL?)

GD