(base) bash-5.2$ date
Wed Nov 29 02:29:57 PM EST 2023
(base) bash-5.2$ pwd
/home/accts/sbs5/cs200/www/lectures
(base) bash-5.2$ p
Python 3.11.6 (main, Oct  3 2023, 00:00:00) [GCC 12.3.1 20230508 (Red Hat 12.3.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from hw7hints import *
>>> S
<wordsegment.Segmenter object at 0x7f60cf86bdd0>
>>> S.segment('todayisthefirstdayoftherestofyourlife')
['today', 'is', 'the', 'first', 'day', 'of', 'the', 'rest', 'of', 'your', 'life']
>>> S.segment('dogsandcats')
['dogs', 'and', 'cats']
>>> cencode('today is the first day of the rest of your life',7)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'cencode' is not defined
>>> hw7a.cencode('today is the first day of the rest of your life',7)
'avkhfpzaolmpyzakhfvmaolylzavmfvbyspml'
>>> a = hw7a.cencode('today is the first day of the rest of your life',7)
>>> a
'avkhfpzaolmpyzakhfvmaolylzavmfvbyspml'
>>> hw7a.cdecode(a,7)
'todayisthefirstdayoftherestofyourlife'
>>> S.segment(hw7a.cdecode(a,7))
['today', 'is', 'the', 'first', 'day', 'of', 'the', 'rest', 'of', 'your', 'life']
>>> a = hw7a.cencode('today is the first day of the rest of your LIFE',7)
>>> a
'avkhfpzaolmpyzakhfvmaolylzavmfvbyspml'
>>> S.wordsegment('dkdkdkd')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'Segmenter' object has no attribute 'wordsegment'
>>> S.segment('dkdkdkd')
['dkdkdkd']
>>> S.segment('dogdogdog')
['dog', 'dog', 'dog']
>>> p2
'thisisanotherlittlestring'
>>> list(p2)
['t', 'h', 'i', 's', 'i', 's', 'a', 'n', 'o', 't', 'h', 'e', 'r', 'l', 'i', 't', 't', 'l', 'e', 's', 't', 'r', 'i', 'n', 'g']
>>> numpy.asarray(list(p2))
array(['t', 'h', 'i', 's', 'i', 's', 'a', 'n', 'o', 't', 'h', 'e', 'r',
       'l', 'i', 't', 't', 'l', 'e', 's', 't', 'r', 'i', 'n', 'g'],
      dtype='<U1')
>>> numpy.asarray(list(p2)).reshape([5,5])
array([['t', 'h', 'i', 's', 'i'],
       ['s', 'a', 'n', 'o', 't'],
       ['h', 'e', 'r', 'l', 'i'],
       ['t', 't', 'l', 'e', 's'],
       ['t', 'r', 'i', 'n', 'g']], dtype='<U1')
>>> p2a2
array([['t', 'h', 'i', 's', 'i'],
       ['s', 'a', 'n', 'o', 't'],
       ['h', 'e', 'r', 'l', 'i'],
       ['t', 't', 'l', 'e', 's'],
       ['t', 'r', 'i', 'n', 'g']], dtype='<U1')
>>> swap_cols(p2a2, 1, 2)
>>> p2a2
array([['t', 'i', 'h', 's', 'i'],
       ['s', 'n', 'a', 'o', 't'],
       ['h', 'r', 'e', 'l', 'i'],
       ['t', 'l', 't', 'e', 's'],
       ['t', 'i', 'r', 'n', 'g']], dtype='<U1')
>>> swap_rows(p2a2, 1, 2)
>>> p2a2
array([['t', 'i', 'h', 's', 'i'],
       ['h', 'r', 'e', 'l', 'i'],
       ['s', 'n', 'a', 'o', 't'],
       ['t', 'l', 't', 'e', 's'],
       ['t', 'i', 'r', 'n', 'g']], dtype='<U1')
>>> p2a
array(['t', 'i', 'h', 's', 'i', 'h', 'r', 'e', 'l', 'i', 's', 'n', 'a',
       'o', 't', 't', 'l', 't', 'e', 's', 't', 'i', 'r', 'n', 'g'],
      dtype='<U1')
>>> p2a = numpy.asarray(list(p2))
>>> p2a
array(['t', 'h', 'i', 's', 'i', 's', 'a', 'n', 'o', 't', 'h', 'e', 'r',
       'l', 'i', 't', 't', 'l', 'e', 's', 't', 'r', 'i', 'n', 'g'],
      dtype='<U1')
>>> p2a2 = p2a.reshape([5,5])
>>> p2a2
array([['t', 'h', 'i', 's', 'i'],
       ['s', 'a', 'n', 'o', 't'],
       ['h', 'e', 'r', 'l', 'i'],
       ['t', 't', 'l', 'e', 's'],
       ['t', 'r', 'i', 'n', 'g']], dtype='<U1')
>>> hw7a.permute_cols(p2a2, [4,3,2,1,0])
array([['i', 's', 'i', 'h', 't'],
       ['t', 'o', 'n', 'a', 's'],
       ['i', 'l', 'r', 'e', 'h'],
       ['s', 'e', 'l', 't', 't'],
       ['g', 'n', 'i', 'r', 't']], dtype='<U1')
>>> p2a2
array([['t', 'h', 'i', 's', 'i'],
       ['s', 'a', 'n', 'o', 't'],
       ['h', 'e', 'r', 'l', 'i'],
       ['t', 't', 'l', 'e', 's'],
       ['t', 'r', 'i', 'n', 'g']], dtype='<U1')
>>> hw7a.permute_rows(p2a2, [4,3,2,1,0])
array([['t', 'r', 'i', 'n', 'g'],
       ['t', 't', 'l', 'e', 's'],
       ['h', 'e', 'r', 'l', 'i'],
       ['s', 'a', 'n', 'o', 't'],
       ['t', 'h', 'i', 's', 'i']], dtype='<U1')
>>> p2shuffle = list(range(5))
>>> p2shuffle
[0, 1, 2, 3, 4]
>>> random.shuffle(p2shuffle)
>>> p2shuffle
[1, 0, 3, 4, 2]
>>> random.shuffle(p2shuffle)
>>> p2shuffle
[4, 2, 0, 1, 3]
>>> p2x = list(range(3))
>>> p2x
[0, 1, 2]
>>> p2xi = itertools.permutations(p2x)
>>> p2xi
<itertools.permutations object at 0x7f604afdb4c0>
>>> list(p2xi)
[(0, 1, 2), (0, 2, 1), (1, 0, 2), (1, 2, 0), (2, 0, 1), (2, 1, 0)]
>>> str
<class 'str'>
>>> s = b'string'
>>> s
b'string'
>>> key = b'kermit'
>>> code = encodexorbase64(s, key)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'encodexorbase64' is not defined
>>> code = hw7a.encodexorbase64(s, key)
>>> code
(b'\x02\x01\x04\x00\x03\x00Y^\x00', b'a2VybWl0\n')
>>> hw7a.decodexorbase64(code[0], code[1])
b'string'
>>> p4
b'thisisatest'
>>> binascii.b2a_base64(p4)

b'dGhpc2lzYXRlc3Q=\n'
>>> >>> ord't')
  File "<stdin>", line 1
    ord't')
          ^
SyntaxError: unmatched ')'
>>> ord('t')
116
>>> binascii.b2a_base64('ABC')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: a bytes-like object is required, not 'str'
>>> binascii.b2a_base64(b'ABC')
b'QUJD\n'
>>> ord('A')
65
>>> p4b64
b'dGhpc2lzYXRlc3Q=\n'
>>> p4xor
b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
>>> strxor(p4xor,p4b64)
b'dGhpc2lzYXRlc3Q=\n'
>>> binascii.a2b_base64(p4againb64)
b'thisisatest'
>>> 
(base) bash-5.2$ pwd
/home/accts/sbs5/cs200/www/lectures
(base) bash-5.2$ cd /c/cs200/hws/hw7
(base) bash-5.2$ ls
decode.sh  hw7.py   password  poem2  poem4
encode.sh  hw7.py~  poem1     poem3  poem5
(base) bash-5.2$ head poem1
Forgetfulness
BY BILLY COLLINS
The name of the author is the first to go
followed obediently by the title, the plot,
the heartbreaking conclusion, the entire novel
which suddenly becomes one you have never read, never even heard of,

as if, one by one, the memories you used to harbor
decided to retire to the southern hemisphere of the brain,
to a little fishing village where there are no phones.
(base) bash-5.2$ which openssl
/usr/bin/openssl
(base) bash-5.2$ openssl --help
help:

Standard commands
asn1parse         ca                ciphers           cmp               
cms               crl               crl2pkcs7         dgst              
dhparam           dsa               dsaparam          ec                
ecparam           enc               engine            errstr            
fipsinstall       gendsa            genpkey           genrsa            
help              info              kdf               list              
mac               nseq              ocsp              passwd            
pkcs12            pkcs7             pkcs8             pkey              
pkeyparam         pkeyutl           prime             rand              
rehash            req               rsa               rsautl            
s_client          s_server          s_time            sess_id           
smime             speed             spkac             srp               
storeutl          ts                verify            version           
x509              

Message Digest commands (see the `dgst' command for more details)
blake2b512        blake2s256        md2               md4               
md5               rmd160            sha1              sha224            
sha256            sha3-224          sha3-256          sha3-384          
sha3-512          sha384            sha512            sha512-224        
sha512-256        shake128          shake256          sm3               

Cipher commands (see the `enc' command for more details)
aes-128-cbc       aes-128-ecb       aes-192-cbc       aes-192-ecb       
aes-256-cbc       aes-256-ecb       aria-128-cbc      aria-128-cfb      
aria-128-cfb1     aria-128-cfb8     aria-128-ctr      aria-128-ecb      
aria-128-ofb      aria-192-cbc      aria-192-cfb      aria-192-cfb1     
aria-192-cfb8     aria-192-ctr      aria-192-ecb      aria-192-ofb      
aria-256-cbc      aria-256-cfb      aria-256-cfb1     aria-256-cfb8     
aria-256-ctr      aria-256-ecb      aria-256-ofb      base64            
bf                bf-cbc            bf-cfb            bf-ecb            
bf-ofb            camellia-128-cbc  camellia-128-ecb  camellia-192-cbc  
camellia-192-ecb  camellia-256-cbc  camellia-256-ecb  cast              
cast-cbc          cast5-cbc         cast5-cfb         cast5-ecb         
cast5-ofb         des               des-cbc           des-cfb           
des-ecb           des-ede           des-ede-cbc       des-ede-cfb       
des-ede-ofb       des-ede3          des-ede3-cbc      des-ede3-cfb      
des-ede3-ofb      des-ofb           des3              desx              
idea              idea-cbc          idea-cfb          idea-ecb          
idea-ofb          rc2               rc2-40-cbc        rc2-64-cbc        
rc2-cbc           rc2-cfb           rc2-ecb           rc2-ofb           
rc4               rc4-40            rc5               rc5-cbc           
rc5-cfb           rc5-ecb           rc5-ofb           seed              
seed-cbc          seed-cfb          seed-ecb          seed-ofb          
zlib              

(base) bash-5.2$ echo $RANOM

(base) bash-5.2$ echo $RANDOM
12766
(base) bash-5.2$ echo $(($RANDOM % 7))
5
(base) bash-5.2$ echo $(($RANDOM % 7))
6
(base) bash-5.2$ echo $(($RANDOM % 7))
1
(base) bash-5.2$ ls
decode.sh  encode.sh  hw7.py  hw7.py~  password  poem1	poem2  poem3  poem4  poem5
(base) bash-5.2$ cat password 
YELLOW SUBMARINE(base) bash-5.2$ openssl enc -e -des -in poem1 -out poem1.des.out -pass file:password
*** WARNING : deprecated key derivation used.
Using -iter or -pbkdf2 would be better.
Error setting cipher DES-CBC
00522CC03B7F0000:error:0308010C:digital envelope routines:inner_evp_generic_fetch:unsupported:crypto/evp/evp_fetch.c:373:Global default library context, Algorithm (DES-CBC : 11), Properties ()
(base) bash-5.2$ ls
decode.sh  hw7.py   password  poem1.des.out  poem3  poem5
encode.sh  hw7.py~  poem1     poem2	     poem4
(base) bash-5.2$ ls -l
total 60
-rwxrwxr-x 1 sbs5 cs200ta   521 Nov 24 12:03 decode.sh
-rwxrwxr-x 1 sbs5 cs200ta   539 Nov 24 12:03 encode.sh
-rwxrwxr-x 1 sbs5 cs200ta 16214 Nov 24 12:14 hw7.py
-rwxrwxr-x 1 sbs5 cs200ta 16231 Nov 24 12:03 hw7.py~
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 24 12:03 password
-rw-rw-r-- 1 sbs5 cs200ta  1255 Nov 24 12:03 poem1
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 29 15:34 poem1.des.out
-rw-rw-r-- 1 sbs5 cs200ta  1723 Nov 24 12:03 poem2
-rw-rw-r-- 1 sbs5 cs200ta  1501 Nov 24 12:03 poem3
-rw-rw-r-- 1 sbs5 cs200ta   556 Nov 24 12:03 poem4
-rw-rw-r-- 1 sbs5 cs200ta   965 Nov 24 12:03 poem5
(base) bash-5.2$ openssl enc -e -des3 -in poem1 -out poem1.des3.out -pass file:password
*** WARNING : deprecated key derivation used.
Using -iter or -pbkdf2 would be better.
(base) bash-5.2$ ls -l
total 64
-rwxrwxr-x 1 sbs5 cs200ta   521 Nov 24 12:03 decode.sh
-rwxrwxr-x 1 sbs5 cs200ta   539 Nov 24 12:03 encode.sh
-rwxrwxr-x 1 sbs5 cs200ta 16214 Nov 24 12:14 hw7.py
-rwxrwxr-x 1 sbs5 cs200ta 16231 Nov 24 12:03 hw7.py~
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 24 12:03 password
-rw-rw-r-- 1 sbs5 cs200ta  1255 Nov 24 12:03 poem1
-rw-rw-r-- 1 sbs5 cs200ta  1272 Nov 29 15:35 poem1.des3.out
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 29 15:34 poem1.des.out
-rw-rw-r-- 1 sbs5 cs200ta  1723 Nov 24 12:03 poem2
-rw-rw-r-- 1 sbs5 cs200ta  1501 Nov 24 12:03 poem3
-rw-rw-r-- 1 sbs5 cs200ta   556 Nov 24 12:03 poem4
-rw-rw-r-- 1 sbs5 cs200ta   965 Nov 24 12:03 poem5
(base) bash-5.2$ head poem1.des3.out 
Salted__�tz��aq'�Z'Ԛ)�Ё#�P�������H޼���+@|Nh���$����s�
��`g>�* FN�}�02b�\����Zޜ�f�~��q�(���mې���W|O�l���{E<�!�HL.�ܑ��/y�n﯈�������iXa�[������������|Le�;�4-Z��-��P;�z�U��sab��M=&��$�x�ou�
�0����DW��ī���ܞ�R��K���썐|��ԗ��ї]�rc���;��i(p:a��U}J�nZfD
p�#U��q���n��M��O�V�`	Q�A�^t�6�c��R��Ưg��'DZ��6���Rz\aqO��~$4뻢K ��K������!�Ä���g5����`�:�(�����z����c=��ۂ�{��u���@�ո[����O4�0&E)
t���ST���l��#��[����,`[�4p��m���m��."T"gڹ��k��A�<Ur;
�se]��,�\ty��=Íuٱ�	�K@��ӭuz�A�#Z>�.��D�B1S}�j�X
�EJXS�	:%�B�.��f��Y>Ƙ��i��~�.׌_ �.�mWn'L�����~ѥDi?@b�kj�|o�^��6M%���x��u�$��=qNA���R<�l��>�w燫e����郜s!Z�e��H�n���[��{���3F��:�գna�*��A��p��˭��CG_k0�]�ؼ�(base) bash-5.2$ openssl enc -e -des3 -in poem1 -out poem1.des3.out .b64-pass file:password -base64
enc: Use -help for summary.
(base) bash-5.2$ ls -l
total 64
-rwxrwxr-x 1 sbs5 cs200ta   521 Nov 24 12:03 decode.sh
-rwxrwxr-x 1 sbs5 cs200ta   539 Nov 24 12:03 encode.sh
-rwxrwxr-x 1 sbs5 cs200ta 16214 Nov 24 12:14 hw7.py
-rwxrwxr-x 1 sbs5 cs200ta 16231 Nov 24 12:03 hw7.py~
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 24 12:03 password
-rw-rw-r-- 1 sbs5 cs200ta  1255 Nov 24 12:03 poem1
-rw-rw-r-- 1 sbs5 cs200ta  1272 Nov 29 15:35 poem1.des3.out
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 29 15:34 poem1.des.out
-rw-rw-r-- 1 sbs5 cs200ta  1723 Nov 24 12:03 poem2
-rw-rw-r-- 1 sbs5 cs200ta  1501 Nov 24 12:03 poem3
-rw-rw-r-- 1 sbs5 cs200ta   556 Nov 24 12:03 poem4
-rw-rw-r-- 1 sbs5 cs200ta   965 Nov 24 12:03 poem5
(base) bash-5.2$ openssl enc -e -des3 -in poem1 -out poem1.des3.out.b64 -pass file:password -base64
*** WARNING : deprecated key derivation used.
Using -iter or -pbkdf2 would be better.
(base) bash-5.2$ ls -l
total 68
-rwxrwxr-x 1 sbs5 cs200ta   521 Nov 24 12:03 decode.sh
-rwxrwxr-x 1 sbs5 cs200ta   539 Nov 24 12:03 encode.sh
-rwxrwxr-x 1 sbs5 cs200ta 16214 Nov 24 12:14 hw7.py
-rwxrwxr-x 1 sbs5 cs200ta 16231 Nov 24 12:03 hw7.py~
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 24 12:03 password
-rw-rw-r-- 1 sbs5 cs200ta  1255 Nov 24 12:03 poem1
-rw-rw-r-- 1 sbs5 cs200ta  1272 Nov 29 15:35 poem1.des3.out
-rw-rw-r-- 1 sbs5 cs200ta  1723 Nov 29 15:36 poem1.des3.out.b64
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 29 15:34 poem1.des.out
-rw-rw-r-- 1 sbs5 cs200ta  1723 Nov 24 12:03 poem2
-rw-rw-r-- 1 sbs5 cs200ta  1501 Nov 24 12:03 poem3
-rw-rw-r-- 1 sbs5 cs200ta   556 Nov 24 12:03 poem4
-rw-rw-r-- 1 sbs5 cs200ta   965 Nov 24 12:03 poem5
(base) bash-5.2$ head poem1.des3.out.b64 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(base) bash-5.2$ openssl enc -d -des3 -in poem1.xx -in poem1.des3.out.b64 -pass file:password -base64
*** WARNING : deprecated key derivation used.
Using -iter or -pbkdf2 would be better.
Forgetfulness
BY BILLY COLLINS
The name of the author is the first to go
followed obediently by the title, the plot,
the heartbreaking conclusion, the entire novel
which suddenly becomes one you have never read, never even heard of,

as if, one by one, the memories you used to harbor
decided to retire to the southern hemisphere of the brain,
to a little fishing village where there are no phones.

Long ago you kissed the names of the nine muses goodbye
and watched the quadratic equation pack its bag,
and even now as you memorize the order of the planets,

something else is slipping away, a state flower perhaps,
the address of an uncle, the capital of Paraguay.

Whatever it is you are struggling to remember,
it is not poised on the tip of your tongue
or even lurking in some obscure corner of your spleen.

It has floated away down a dark mythological river
whose name begins with an L as far as you can recall

well on your own way to oblivion where you will join those
who have even forgotten how to swim and how to ride a bicycle.

No wonder you rise in the middle of the night
to look up the date of a famous battle in a book on war.
No wonder the moon in the window seems to have drifted   
out of a love poem that you used to know by heart.
(base) bash-5.2$ openssl enc -d -des3 -out poem1.xx -in poem1.des3.out.b64 -pass file:password -base64
*** WARNING : deprecated key derivation used.
Using -iter or -pbkdf2 would be better.
(base) bash-5.2$ ls -l
total 72
-rwxrwxr-x 1 sbs5 cs200ta   521 Nov 24 12:03 decode.sh
-rwxrwxr-x 1 sbs5 cs200ta   539 Nov 24 12:03 encode.sh
-rwxrwxr-x 1 sbs5 cs200ta 16214 Nov 24 12:14 hw7.py
-rwxrwxr-x 1 sbs5 cs200ta 16231 Nov 24 12:03 hw7.py~
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 24 12:03 password
-rw-rw-r-- 1 sbs5 cs200ta  1255 Nov 24 12:03 poem1
-rw-rw-r-- 1 sbs5 cs200ta  1272 Nov 29 15:35 poem1.des3.out
-rw-rw-r-- 1 sbs5 cs200ta  1723 Nov 29 15:36 poem1.des3.out.b64
-rw-rw-r-- 1 sbs5 cs200ta    16 Nov 29 15:34 poem1.des.out
-rw-rw-r-- 1 sbs5 cs200ta  1255 Nov 29 15:37 poem1.xx
-rw-rw-r-- 1 sbs5 cs200ta  1723 Nov 24 12:03 poem2
-rw-rw-r-- 1 sbs5 cs200ta  1501 Nov 24 12:03 poem3
-rw-rw-r-- 1 sbs5 cs200ta   556 Nov 24 12:03 poem4
-rw-rw-r-- 1 sbs5 cs200ta   965 Nov 24 12:03 poem5
(base) bash-5.2$ head poem1.xx
Forgetfulness
BY BILLY COLLINS
The name of the author is the first to go
followed obediently by the title, the plot,
the heartbreaking conclusion, the entire novel
which suddenly becomes one you have never read, never even heard of,

as if, one by one, the memories you used to harbor
decided to retire to the southern hemisphere of the brain,
to a little fishing village where there are no phones.
(base) bash-5.2$ diff poem1 poem1.xx
(base) bash-5.2$ echo $?
0
(base) bash-5.2$ ls djdjd
ls: cannot access 'djdjd': No such file or directory
(base) bash-5.2$ echo $?
2
(base) bash-5.2$ exit

Process shell finished