Input strings must be a multiple of 16 in length ( i have done the padding )

import os,sys,ctypes,struct,random

from getpass import *

from Crypto.Cipher import AES

from Crypto import Random



user = getuser()

extensions = ('.png')

paths = ['C:\Users\' + user + '\Desktop\Test']

Key = Random.new().read(AES.block_size)



def encryption ( Key,in_filename , out_filename=None , chuncksize =64*1024):

    if not out_filename:

        out_filename = in_filename + '.wbi'

    IV = Random.new().read(AES.block_size)

    encryptor = AES.new(Key,AES.MODE_CBC, IV)

    filesize = os.path.getsize(in_filename)



    with open (in_filename,'r', errors='ignore') as infile:

        with open (out_filename,'wb') as outfile:

            outfile.write(struct.pack('<Q', filesize))

            outfile.write(IV)

            while True:

                chunck = infile.read(chuncksize)

                if (len(chunck)==0):

                    break

                elif (len(chunck)%16!=0):



                    chunck+= ' ' * (16-len(chunck)%16)

                    #chunck+= ' '*(16-len(chunck)%16)

                    outfile.write(encryptor.encrypt(chunck))



def file_enc ():

    for path in paths:

        for root,dirs,files in os.walk(path):

            for file in files:

                if(file.endswith(extensions)):

                    encryption(Key, os.path.join(root,file))

                    os.remove(os.path.join(root,file))





file_enc ()

OUTPUT : return self._cipher.encrypt(plaintext)
ValueError: Input
strings must be a multiple of 16 in length

i have done the padding as u can see here :

elif (len(chunck)%16!=0):



                    chunck+= ' ' * (16-len(chunck)%16)

Traceback:

Traceback (most recent call last):

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 41, in <module>

    file_enc ()

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 37, in file_enc

    encryption(Key, os.path.join(root,file))

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 30, in encryption

    outfile.write(encryptor.encrypt(chunck))

  File "C:Python32libsite-packagesCryptoCipherblockalgo.py", line 244, in encrypt

    return self._cipher.encrypt(plaintext)

ValueError: Input strings must be a multiple of 16 in length

but still i dont know how to fix it any help will be appreciated

using python 3.2.5

edited Nov 25 '18 at 2:17

ShadowRanger

61.1k55796

asked Nov 25 '18 at 1:53

Skon Houas

please reformat your code and errors properly and give a bit more of context.

– LoneWanderer
Nov 25 '18 at 2:00

Provide the full traceback, not just the error message alone; the traceback is needed to show where the problem is in your code.

– ShadowRanger
Nov 25 '18 at 2:07

Side-note: If this is Python 3, you shouldn't be reading your file in text mode. The encryptor should either explode (expecting bytes) or it might seamlessly encode the text, but if it encodes it in a variable width encoding like UTF-8, you might end up with a multiple of 16 growing to a non-multiple. Work with raw bytes at all times, not str.

– ShadowRanger
Nov 25 '18 at 2:12

On checking the source code where it's going wrong, I'm more sure that passing str to the API is wrong. You need to pass bytes, so open your file in 'rb' mode, pad with b' ', not ' ', etc.

– ShadowRanger
Nov 25 '18 at 2:23

Another side note: Using AES in CBC mode with no MAC is not "encryption done right". Please see: en.wikipedia.org/wiki/Authenticated_encryption

– duskwuff
Nov 25 '18 at 3:11

add a comment |

import os,sys,ctypes,struct,random

from getpass import *

from Crypto.Cipher import AES

from Crypto import Random



user = getuser()

extensions = ('.png')

paths = ['C:\Users\' + user + '\Desktop\Test']

Key = Random.new().read(AES.block_size)



def encryption ( Key,in_filename , out_filename=None , chuncksize =64*1024):

    if not out_filename:

        out_filename = in_filename + '.wbi'

    IV = Random.new().read(AES.block_size)

    encryptor = AES.new(Key,AES.MODE_CBC, IV)

    filesize = os.path.getsize(in_filename)



    with open (in_filename,'r', errors='ignore') as infile:

        with open (out_filename,'wb') as outfile:

            outfile.write(struct.pack('<Q', filesize))

            outfile.write(IV)

            while True:

                chunck = infile.read(chuncksize)

                if (len(chunck)==0):

                    break

                elif (len(chunck)%16!=0):



                    chunck+= ' ' * (16-len(chunck)%16)

                    #chunck+= ' '*(16-len(chunck)%16)

                    outfile.write(encryptor.encrypt(chunck))



def file_enc ():

    for path in paths:

        for root,dirs,files in os.walk(path):

            for file in files:

                if(file.endswith(extensions)):

                    encryption(Key, os.path.join(root,file))

                    os.remove(os.path.join(root,file))





file_enc ()

OUTPUT : return self._cipher.encrypt(plaintext)
ValueError: Input
strings must be a multiple of 16 in length

i have done the padding as u can see here :

elif (len(chunck)%16!=0):



                    chunck+= ' ' * (16-len(chunck)%16)

Traceback:

Traceback (most recent call last):

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 41, in <module>

    file_enc ()

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 37, in file_enc

    encryption(Key, os.path.join(root,file))

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 30, in encryption

    outfile.write(encryptor.encrypt(chunck))

  File "C:Python32libsite-packagesCryptoCipherblockalgo.py", line 244, in encrypt

    return self._cipher.encrypt(plaintext)

ValueError: Input strings must be a multiple of 16 in length

but still i dont know how to fix it any help will be appreciated

using python 3.2.5

edited Nov 25 '18 at 2:17

ShadowRanger

61.1k55796

asked Nov 25 '18 at 1:53

Skon Houas

please reformat your code and errors properly and give a bit more of context.

– LoneWanderer
Nov 25 '18 at 2:00

Provide the full traceback, not just the error message alone; the traceback is needed to show where the problem is in your code.

– ShadowRanger
Nov 25 '18 at 2:07

Side-note: If this is Python 3, you shouldn't be reading your file in text mode. The encryptor should either explode (expecting bytes) or it might seamlessly encode the text, but if it encodes it in a variable width encoding like UTF-8, you might end up with a multiple of 16 growing to a non-multiple. Work with raw bytes at all times, not str.

– ShadowRanger
Nov 25 '18 at 2:12

On checking the source code where it's going wrong, I'm more sure that passing str to the API is wrong. You need to pass bytes, so open your file in 'rb' mode, pad with b' ', not ' ', etc.

– ShadowRanger
Nov 25 '18 at 2:23

Another side note: Using AES in CBC mode with no MAC is not "encryption done right". Please see: en.wikipedia.org/wiki/Authenticated_encryption

– duskwuff
Nov 25 '18 at 3:11

add a comment |

import os,sys,ctypes,struct,random

from getpass import *

from Crypto.Cipher import AES

from Crypto import Random



user = getuser()

extensions = ('.png')

paths = ['C:\Users\' + user + '\Desktop\Test']

Key = Random.new().read(AES.block_size)



def encryption ( Key,in_filename , out_filename=None , chuncksize =64*1024):

    if not out_filename:

        out_filename = in_filename + '.wbi'

    IV = Random.new().read(AES.block_size)

    encryptor = AES.new(Key,AES.MODE_CBC, IV)

    filesize = os.path.getsize(in_filename)



    with open (in_filename,'r', errors='ignore') as infile:

        with open (out_filename,'wb') as outfile:

            outfile.write(struct.pack('<Q', filesize))

            outfile.write(IV)

            while True:

                chunck = infile.read(chuncksize)

                if (len(chunck)==0):

                    break

                elif (len(chunck)%16!=0):



                    chunck+= ' ' * (16-len(chunck)%16)

                    #chunck+= ' '*(16-len(chunck)%16)

                    outfile.write(encryptor.encrypt(chunck))



def file_enc ():

    for path in paths:

        for root,dirs,files in os.walk(path):

            for file in files:

                if(file.endswith(extensions)):

                    encryption(Key, os.path.join(root,file))

                    os.remove(os.path.join(root,file))





file_enc ()

OUTPUT : return self._cipher.encrypt(plaintext)
ValueError: Input
strings must be a multiple of 16 in length

i have done the padding as u can see here :

elif (len(chunck)%16!=0):



                    chunck+= ' ' * (16-len(chunck)%16)

Traceback:

Traceback (most recent call last):

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 41, in <module>

    file_enc ()

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 37, in file_enc

    encryption(Key, os.path.join(root,file))

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 30, in encryption

    outfile.write(encryptor.encrypt(chunck))

  File "C:Python32libsite-packagesCryptoCipherblockalgo.py", line 244, in encrypt

    return self._cipher.encrypt(plaintext)

ValueError: Input strings must be a multiple of 16 in length

but still i dont know how to fix it any help will be appreciated

using python 3.2.5

edited Nov 25 '18 at 2:17

ShadowRanger

61.1k55796

asked Nov 25 '18 at 1:53

Skon Houas

import os,sys,ctypes,struct,random

from getpass import *

from Crypto.Cipher import AES

from Crypto import Random



user = getuser()

extensions = ('.png')

paths = ['C:\Users\' + user + '\Desktop\Test']

Key = Random.new().read(AES.block_size)



def encryption ( Key,in_filename , out_filename=None , chuncksize =64*1024):

    if not out_filename:

        out_filename = in_filename + '.wbi'

    IV = Random.new().read(AES.block_size)

    encryptor = AES.new(Key,AES.MODE_CBC, IV)

    filesize = os.path.getsize(in_filename)



    with open (in_filename,'r', errors='ignore') as infile:

        with open (out_filename,'wb') as outfile:

            outfile.write(struct.pack('<Q', filesize))

            outfile.write(IV)

            while True:

                chunck = infile.read(chuncksize)

                if (len(chunck)==0):

                    break

                elif (len(chunck)%16!=0):



                    chunck+= ' ' * (16-len(chunck)%16)

                    #chunck+= ' '*(16-len(chunck)%16)

                    outfile.write(encryptor.encrypt(chunck))



def file_enc ():

    for path in paths:

        for root,dirs,files in os.walk(path):

            for file in files:

                if(file.endswith(extensions)):

                    encryption(Key, os.path.join(root,file))

                    os.remove(os.path.join(root,file))





file_enc ()

OUTPUT : return self._cipher.encrypt(plaintext)
ValueError: Input
strings must be a multiple of 16 in length

i have done the padding as u can see here :

elif (len(chunck)%16!=0):



                    chunck+= ' ' * (16-len(chunck)%16)

Traceback:

Traceback (most recent call last):

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 41, in <module>

    file_enc ()

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 37, in file_enc

    encryption(Key, os.path.join(root,file))

  File "C:UsersIm Root BicthesDesktopaes encryption done right.py", line 30, in encryption

    outfile.write(encryptor.encrypt(chunck))

  File "C:Python32libsite-packagesCryptoCipherblockalgo.py", line 244, in encrypt

    return self._cipher.encrypt(plaintext)

ValueError: Input strings must be a multiple of 16 in length

but still i dont know how to fix it any help will be appreciated

using python 3.2.5

python aes

edited Nov 25 '18 at 2:17

ShadowRanger

61.1k55796

asked Nov 25 '18 at 1:53

Skon Houas

edited Nov 25 '18 at 2:17

ShadowRanger

61.1k55796

asked Nov 25 '18 at 1:53

Skon Houas

edited Nov 25 '18 at 2:17

ShadowRanger

61.1k55796

edited Nov 25 '18 at 2:17

ShadowRanger

61.1k55796

edited Nov 25 '18 at 2:17

ShadowRanger

61.1k55796

asked Nov 25 '18 at 1:53

Skon Houas

asked Nov 25 '18 at 1:53

Skon Houas

asked Nov 25 '18 at 1:53

Skon Houas

please reformat your code and errors properly and give a bit more of context.

– LoneWanderer
Nov 25 '18 at 2:00

Provide the full traceback, not just the error message alone; the traceback is needed to show where the problem is in your code.

– ShadowRanger
Nov 25 '18 at 2:07

Side-note: If this is Python 3, you shouldn't be reading your file in text mode. The encryptor should either explode (expecting bytes) or it might seamlessly encode the text, but if it encodes it in a variable width encoding like UTF-8, you might end up with a multiple of 16 growing to a non-multiple. Work with raw bytes at all times, not str.

– ShadowRanger
Nov 25 '18 at 2:12

On checking the source code where it's going wrong, I'm more sure that passing str to the API is wrong. You need to pass bytes, so open your file in 'rb' mode, pad with b' ', not ' ', etc.

– ShadowRanger
Nov 25 '18 at 2:23

Another side note: Using AES in CBC mode with no MAC is not "encryption done right". Please see: en.wikipedia.org/wiki/Authenticated_encryption

– duskwuff
Nov 25 '18 at 3:11

add a comment |

please reformat your code and errors properly and give a bit more of context.

– LoneWanderer
Nov 25 '18 at 2:00

Provide the full traceback, not just the error message alone; the traceback is needed to show where the problem is in your code.

– ShadowRanger
Nov 25 '18 at 2:07

Side-note: If this is Python 3, you shouldn't be reading your file in text mode. The encryptor should either explode (expecting bytes) or it might seamlessly encode the text, but if it encodes it in a variable width encoding like UTF-8, you might end up with a multiple of 16 growing to a non-multiple. Work with raw bytes at all times, not str.

– ShadowRanger
Nov 25 '18 at 2:12

On checking the source code where it's going wrong, I'm more sure that passing str to the API is wrong. You need to pass bytes, so open your file in 'rb' mode, pad with b' ', not ' ', etc.

– ShadowRanger
Nov 25 '18 at 2:23

Another side note: Using AES in CBC mode with no MAC is not "encryption done right". Please see: en.wikipedia.org/wiki/Authenticated_encryption

– duskwuff
Nov 25 '18 at 3:11

please reformat your code and errors properly and give a bit more of context.

– LoneWanderer
Nov 25 '18 at 2:00

Provide the full traceback, not just the error message alone; the traceback is needed to show where the problem is in your code.

– ShadowRanger
Nov 25 '18 at 2:07

Side-note: If this is Python 3, you shouldn't be reading your file in text mode. The encryptor should either explode (expecting bytes) or it might seamlessly encode the text, but if it encodes it in a variable width encoding like UTF-8, you might end up with a multiple of 16 growing to a non-multiple. Work with raw bytes at all times, not str.

– ShadowRanger
Nov 25 '18 at 2:12

On checking the source code where it's going wrong, I'm more sure that passing str to the API is wrong. You need to pass bytes, so open your file in 'rb' mode, pad with b' ', not ' ', etc.

– ShadowRanger
Nov 25 '18 at 2:23

Another side note: Using AES in CBC mode with no MAC is not "encryption done right". Please see: en.wikipedia.org/wiki/Authenticated_encryption

– duskwuff
Nov 25 '18 at 3:11

add a comment |

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