tzk | Zeroconf setup for tinc | VPN library
kandi X-RAY | tzk Summary
kandi X-RAY | tzk Summary
Zeroconf setup for tinc (mesh vpn) using consul as coordinator backend, and compatible with kubernetes
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QUESTION
I am in need to convert the python code to java code for RSA-AES Decryption logic. They have provided RSA Encrypted string and private key as a PEM file format. we need to implement the same decryption in java code.
Here , I have included the python code, (this we have to convert into java)
...ANSWER
Answered 2019-May-07 at 19:41As already mentioned in the comment, there is something wrong with the padding:
Although an
OAEPParameterSpec
-instance (oaepParams
) is created, it is not used anywhere!oaepParams
must be passed as third parameter in theCipher#init
-call.OAEP uses a label that by default is an empty byte-array (
PSource.PSpecified.DEFAULT
). Although it is rather unusual, the Python-code doesn't use that default (i.e. the empty byte-array), but a custom byte-sequence (more precisely, the stringOAEP Encrypted
, UTF-8 encoded). Therefore, in theOAEPParameterSpec
- constructor-callPSource.PSpecified.DEFAULT
must be replaced bynew PSource.PSpecified("OAEP Encrypted".getBytes(StandardCharsets.UTF_8))
.
For a more detailed description of OAEP and PSource.PSpecified
see e.g. here and here. If both bugs are fixed, the RSA-decryption of the Java-code corresponds to that of the Python-code (UQQtMe0oUzkguQLzvcBcJMAvmsx2XWU6G-CMZtV1dR0qtu2LXwE=
). By the way, the Java-code contains only the RSA-decryption portion of the Python-code.
QUESTION
So i'm trying to parse a huge file and the code below is taking too long to parse. The File is 2gb in size. I'm hoping some can help me speed it up.
...ANSWER
Answered 2017-Jun-08 at 23:04The culprit is, obviously, shlex.split()
. It's quite an expensive operation (creates a whole new object with a lot of boilerplate for each split), so if your data follows the format presented you can try parsing your data manually.
So, here's a method that performs the same way on your sample data as shlex.split()
:
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