import os
import rpm
import gpgme
import sys
import StringIO
import tempfile

ts = rpm.TransactionSet()
mi = ts.dbMatch('name', 'gpg-pubkey')

rpmdb_keys=[]
for keyhdr in mi:
    key_fo = StringIO.StringIO(keyhdr['description'])
    rpmdb_keys.append(key_fo)

del mi
del ts

ctx = gpgme.Context()
gpghome = '/tmp/foo-gpgme'
if not os.path.exists(gpghome):
    os.makedirs('/tmp/foo-gpgme')
    
#gpghome = tempfile.mkdtemp(prefix='gpgme-%s' % keynum)
os.environ['GNUPGHOME'] = gpghome
fp = open(os.path.join(gpghome, 'gpg.conf'), 'wb')
fp.write('')
fp.close()

for key in rpmdb_keys:
    ctx.import_(key)
    key.close()