CMBDTC 2.0
This commit is contained in:
CMBDTC
Apprentice Alf
parent
3a83053af9
commit
40b326020b
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@ -2,7 +2,7 @@
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"""
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Comprehensive Mazama Book DRM with Topaz Cryptography V1.1
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Comprehensive Mazama Book DRM with Topaz Cryptography V2.0
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-----BEGIN PUBLIC KEY-----
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MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDdBHJ4CNc6DNFCw4MRCw4SWAK6
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@ -44,6 +44,7 @@ global bookPayloadOffset
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global bookHeaderRecords
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global bookMetadata
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global bookKey
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global command
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#
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# Various character maps used to decrypt books. Probably supposed to act as obfuscation
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@ -262,7 +263,7 @@ def getKindleInfoValueForKey(key):
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return getKindleInfoValueForHash(encodeHash(key,charMap2))
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#
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# Get a 7 bit encoded number form the book file
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# Get a 7 bit encoded number from the book file
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#
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def bookReadEncodedNumber():
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@ -283,6 +284,32 @@ def bookReadEncodedNumber():
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if flag:
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data = -data
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return data
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#
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# Encode a number in 7 bit format
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#
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def encodeNumber(number):
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result = ""
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negative = False
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flag = 0
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if number < 0 :
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number = -number + 1
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negative = True
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while True:
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byte = number & 0x7F
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number = number >> 7
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byte += flag
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result += chr(byte)
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flag = 0x80
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if number == 0 : break
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if negative:
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result += chr(0xFF)
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return result[::-1]
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#
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# Get a length prefixed string from the file
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@ -292,6 +319,14 @@ def bookReadString():
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stringLength = bookReadEncodedNumber()
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return unpack(str(stringLength)+"s",bookFile.read(stringLength))[0]
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#
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# Returns a length prefixed string
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#
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def lengthPrefixString(data):
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return encodeNumber(len(data))+data
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#
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# Read and return the data of one header record at the current book file position [[offset,compressedLength,decompressedLength],...]
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#
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@ -583,7 +618,95 @@ def generateDevicePID(table,dsn,nbRoll):
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index = ((((pid[counter] >>5) & 3) ^ pid[counter]) & 0x1f) + (pid[counter] >> 7)
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pidAscii += charMap4[index]
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return pidAscii
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#
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# Create decrypted book payload
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#
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def createDecryptedPayload(payload):
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# store data to be able to create the header later
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headerData= []
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currentOffset = 0
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# Add social DRM to decrypted files
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try:
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data = getKindleInfoValueForKey("kindle.name.info")+":"+ getKindleInfoValueForKey("login")
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if payload!= None:
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payload.write(lengthPrefixString("sdrm"))
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payload.write(encodeNumber(0))
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payload.write(data)
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else:
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currentOffset += len(lengthPrefixString("sdrm"))
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currentOffset += len(encodeNumber(0))
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currentOffset += len(data)
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except:
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pass
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for headerRecord in bookHeaderRecords:
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name = headerRecord
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newRecord = []
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# if you are reading this, you might want to uncomment the next line :-D
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#if name != "dkey" :
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for index in range (0,len(bookHeaderRecords[name])) :
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offset = currentOffset
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if payload != None:
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# write tag
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payload.write(lengthPrefixString(name))
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# write data
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payload.write(encodeNumber(index))
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payload.write(getBookPayloadRecord(name, index))
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else :
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currentOffset += len(lengthPrefixString(name))
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currentOffset += len(encodeNumber(index))
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currentOffset += len(getBookPayloadRecord(name, index))
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newRecord.append([offset,bookHeaderRecords[name][index][1],bookHeaderRecords[name][index][2]])
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headerData.append([name,newRecord])
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return headerData
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#
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# Create decrypted book
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#
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def createDecryptedBook(outputFile):
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outputFile = open(outputFile,"wb")
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# Write the payload in a temporary file
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headerData = createDecryptedPayload(None)
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outputFile.write("TPZ0")
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outputFile.write(encodeNumber(len(headerData)))
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for header in headerData :
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outputFile.write(chr(0x63))
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outputFile.write(lengthPrefixString(header[0]))
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outputFile.write(encodeNumber(len(header[1])))
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for numbers in header[1] :
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outputFile.write(encodeNumber(numbers[0]))
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outputFile.write(encodeNumber(numbers[1]))
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outputFile.write(encodeNumber(numbers[2]))
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outputFile.write(chr(0x64))
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createDecryptedPayload(outputFile)
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outputFile.close()
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#
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# Set the command to execute by the programm according to cmdLine parameters
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#
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def setCommand(name) :
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global command
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if command != "" :
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raise CMBDTCFatal("Invalid command line parameters")
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else :
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command = name
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#
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# Program usage
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#
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@ -592,10 +715,11 @@ def usage():
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print("\nUsage:")
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print("\nCMBDTC.py [options] bookFileName\n")
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print("-p Adds a PID to the list of PIDs that are tried to decrypt the book key (can be used several times)")
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print("-d Saves a decrypted copy of the book")
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print("-r Prints or writes to disk a record indicated in the form name:index (e.g \"img:0\")")
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print("-o Output file name to write records")
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print("-o Output file name to write records and decrypted books")
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print("-v Verbose (can be used several times)")
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print("-i Print kindle.info database")
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print("-i Prints kindle.info database")
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#
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# Main
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@ -606,15 +730,17 @@ def main(argv=sys.argv):
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global bookMetadata
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global bookKey
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global bookFile
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global command
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progname = os.path.basename(argv[0])
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verbose = 0
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printInfo = False
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recordName = ""
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recordIndex = 0
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outputFile = ""
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PIDs = []
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kindleDatabase = None
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command = ""
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try:
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@ -633,13 +759,24 @@ def main(argv=sys.argv):
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if o == "-v":
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verbose+=1
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if o == "-i":
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printInfo = True
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setCommand("printInfo")
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if o =="-o":
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if a == None :
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raise CMBDTCFatal("Invalid parameter for -o")
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outputFile = a
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if o =="-r":
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recordName,recordIndex = a.split(':')
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setCommand("printRecord")
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try:
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recordName,recordIndex = a.split(':')
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except:
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raise CMBDTCFatal("Invalid parameter for -r")
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if o =="-p":
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PIDs.append(a)
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if o =="-d":
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setCommand("doit")
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if command == "" :
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raise CMBDTCFatal("No action supplied on command line")
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#
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# Read the encrypted database
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@ -652,7 +789,7 @@ def main(argv=sys.argv):
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print(message)
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if kindleDatabase != None :
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if printInfo:
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if command == "printInfo" :
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printKindleInfo()
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#
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@ -735,11 +872,20 @@ def main(argv=sys.argv):
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bookKey = bookKeys[0]
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if verbose > 0:
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print("Book key: " + bookKey.encode('hex'))
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if recordName != "" :
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if command == "printRecord" :
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extractBookPayloadRecord(recordName,int(recordIndex),outputFile)
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if outputFile != "" and verbose>0 :
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print("Wrote record to file: "+outputFile)
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if outputFile != "" and verbose>0 :
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print("Wrote record to file: "+outputFile)
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elif command == "doit" :
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if outputFile!="" :
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createDecryptedBook(outputFile)
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if verbose >0 :
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print ("Decrypted book saved. Don't pirate!")
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elif verbose > 0:
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print("Output file name was not supplied.")
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return 0
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