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#
# Helper utilitiy to verify checksums of SRC_URI's
#
# To ease parsing I will use INI files to contain the
# checksums, at least they will force some kind of structure. This allows
# to easily add and replace new sums
#
#
# Example:
# [PN-PV-filename]
# md5=THESUM
# sha256=OTHERSUM
#
# [PN-filename]
# md5=THESUM
# sha256=OTHERSUM
def verify_file(config_path, pn, pv, src_uri, localpath):
"""
Verify using the INI file at config_path and check that
the localpath matches the one specified by the PN-PV-SRCURI
inside the ini file
"""
import ConfigParser, os
parser = ConfigParser.ConfigParser()
if not len(parser.read(config_path)) == 1:
raise Exception("Can not open the '%s'" % config_path)
# Try PN-PV-SRC_URI first and then try PN-SRC_URI
# we rely on the get method to create errors
pn_pv_src = "%s-%s-%s" % (pn,pv,src_uri)
pn_src = "%s-%s" % (pn,src_uri)
if parser.has_section(pn_pv_src):
md5 = parser.get(pn_pv_src, "md5")
sha256 = parser.get(pn_pv_src, "sha256")
elif parser.has_section(pn_src):
md5 = parser.get(pn_src, "md5")
sha256 = parser.get(pn_src, "sha256")
else:
raise Exception("Can not find a section for '%s' '%s' and '%s'" % (pn,pv,src_uri))
# md5 and sha256 should be valid now
if not os.path.exists(localpath):
raise Exception("The path does not exist '%s'" % localpath)
# call md5(sum) and shasum
try:
md5pipe = os.popen('md5sum ' + localpath)
md5data = (md5pipe.readline().split() or [ "" ])[0]
md5pipe.close()
except OSError:
raise Exception("Executing md5sum failed")
try:
shapipe = os.popen('shasum -a256 -p ' + localpath)
shadata = (shapipe.readline().split() or [ "" ])[0]
shapipe.close()
except OSError:
raise Exception("Executing shasum failed")
if not md5 == md5data:
raise Exception("MD5 Sums do not match. Wanted: '%s' Got: '%s'" % (md5, md5data))
if not sha256 == shadata:
raise Exception("SHA256 Sums do not match. Wanted: '%s' Got: '%s'" % (sha256, shadata))
return True
# Test it
verify_file("sample.conf", "qtopia-core", "4.3.0", "ftp://ftp.trolltech.com/qt/source/qtopia-core-opensource-4.2.3.tar.gz", "test.file")
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