| 168 | return data |
| 169 | |
| 170 | def encryption(infile): |
| 171 | # returns encryption: one of Unencrypted, Adobe, B&N and Unknown |
| 172 | encryption = "Error When Checking." |
| 173 | try: |
| 174 | with open(infile,'rb') as infileobject: |
| 175 | bookdata = infileobject.read(58) |
| 176 | # Check for Zip |
| 177 | if bookdata[0:0+2] == b"PK": |
| 178 | foundrights = False |
| 179 | foundencryption = False |
| 180 | inzip = zipfile.ZipFile(infile,'r') |
| 181 | namelist = set(inzip.namelist()) |
| 182 | if 'META-INF/rights.xml' not in namelist or 'META-INF/encryption.xml' not in namelist: |
| 183 | encryption = "Unencrypted" |
| 184 | else: |
| 185 | rights = etree.fromstring(inzip.read('META-INF/rights.xml')) |
| 186 | adept = lambda tag: '{%s}%s' % (NSMAP['adept'], tag) |
| 187 | expr = './/%s' % (adept('encryptedKey'),) |
| 188 | bookkey = ''.join(rights.findtext(expr)) |
| 189 | if len(bookkey) == 172: |
| 190 | encryption = "Adobe" |
| 191 | elif len(bookkey) == 64: |
| 192 | encryption = "B&N" |
| 193 | else: |
| 194 | encryption = "Unknown" |
| 195 | except: |
| 196 | traceback.print_exc() |
| 197 | return encryption |
| 198 | |
| 199 | def main(): |
| 200 | argv=unicode_argv() |