Encrypt in PHP and decrypt in Python or openssl command line -

a lot of data in database took on contains encrypted fields. method used encrypt data following php code:

<?php $text = "test 1234\ntest 2345\ntest 3456\ntest 4567"; $key = "0123456789abcdefghijklmnopqrstuv"; $enc = openssl_encrypt($text, "aes-256-cbc", $key); echo "raw: " . $text . "\n"; echo "key: " . $key . "\n"; echo "key (hex) " . bin2hex($key) . "\n"; echo $enc; echo "\n"; ?> 

when run code following output including warning empty initialization vector (iv), have ignore because whole db data encrypted way (i know should not done way).

warning: openssl_encrypt(): using empty initialization vector (iv) potentially insecure , not recommended in /tmp/cp3_encdec/enc2.php on line 5 raw: test 1234 test 2345 test 3456 test 4567 key: 0123456789abcdefghijklmnopqrstuv key (hex) 303132333435363738396162636465666768696a6b6c6d6e6f70717273747576 upnxdo2k0gvy/+mw0yfr7utfsrndap8yyadxt352w3lpknoknmg+l3efkei0zeze 

decrypt using php openssl_decrypt($encrypted, "aes-256-cbc", $key) gives me full output. php manual not give lot of insight used encrypt in regards padding , iv when leaving values empty.

next tried decrypt on command line using openssl command:

echo "upnxdo2k0gvy/+mw0yfr7utfsrndap8yyadxt352w3lpknoknmg+l3efkei0zeze" | openssl aes-256-cbc -d -a -k 303132333435363738396162636465666768696a6b6c6d6e6f70717273747576 -iv 0 

which works fine , returns initial input:

test 1234 test 2345 test 3456 test 4567 

trying decrypt in python using following code results in wrong decryption:

import base64 crypto.cipher import aes   pad = u'\0000'   def decrypt(enc, key):     decobj = aes.new(key, aes.mode_ecb)     data = decobj.decrypt(base64.b64decode(enc))     data = data.rstrip(pad.encode())     print(str(data))  key = "0123456789abcdefghijklmnopqrstuv" decrypt("upnxdo2k0gvy/+mw0yfr7utfsrndap8yyadxt352w3lpknoknmg+l3efkei0zeze", key) 

result, first 16 bytes readable not rest:

b'test 1234\ntest 2\x8b\xc7b|\xf9\xef\xa3\x1f\xd2\xcc\xd7#\xe7\x8b%\x8b\x981\x92\x87v4\xa8;h\xa9\xf8fw\x7frp' 

modifying input contain more data break decryption using openssl command:

raw: [system] test:1234 [system] test:2345 [database] test:3456 [unknown] test:4567  key: 0123456789abcdefghijklmnopqrstuv key (hex) 303132333435363738396162636465666768696a6b6c6d6e6f70717273747576 9kwsggla1/g3f36kujj/ohnienidorzulwr8pxzhwjhul2xsdzlwln8jmptp9fcwgy42otq7rtm+/8ckpigfpwry/3nelvf8unedsvukrlc= 

openssl command line:

echo "9kwsggla1/g3f36kujj/ohnienidorzulwr8pxzhwjhul2xsdzlwln8jmptp9fcwgy42otq7rtm+/8ckpigfpwry/3nelvf8unedsvukrlc=" | openssl aes-256-cbc -d -a -k 303132333435363738396162636465666768696a6b6c6d6e6f70717273747576 -iv 0 bad decrypt 15143:error:0606506d:digital envelope routines:evp_decryptfinal_ex:wrong final block length:/buildroot/library/caches/com.apple.xbs/sources/openssl098/openssl098-64/src/crypto/evp/evp_enc.c:323: 

the same using python code above result in first 16 bytes readable, not rest:

b'[system] test:12\xc7\x91\xa6c\x11\xa3\xa4\x8cr\x12#\x84$\xf7\x0c\xd4ip!f6\xa8\xed0np\x1d\xc7\x174\xa5\xc5n\xe3\x00\x9f\x01\xa8\xc3\x18\xea\x158\xc0:\x9b\x9cx\xee\xf9x\xfc\x1a\xcf j\xca\xc5\xf4\xbf\x08\x16\x8f<' 

again if using php openssl_decrypt works:

<?php $text = "9kwsggla1/g3f36kujj/ohnienidorzulwr8pxzhwjhul2xsdzlwln8jmptp9fcwgy42otq7rtm+/8ckpigfpwry/3nelvf8unedsvukrlc="; $key = "0123456789abcdefghijklmnopqrstuv"; $dec = openssl_decrypt($text, "aes-256-cbc", $key); echo $dec; echo "\n"; ?>  [system] test:1234 [system] test:2345 [database] test:3456 [unknown] test:4567 

someone has idea how php encrypts data, suppose padding problem not sure , open on topic.

i made modifications python code seems solve issue:

import base64 crypto.cipher import aes   iv = 16 * '\x00'  def decrypt(enc, key):     decobj = aes.new(key, aes.mode_cbc, iv)     data = decobj.decrypt(base64.b64decode(enc))     print(str(data.decode()))  key = "0123456789abcdefghijklmnopqrstuv" decrypt("upnxdo2k0gvy/+mw0yfr7utfsrndap8yyadxt352w3lpknoknmg+l3efkei0zeze", key) 

on command line did not found solution yet.