fpe | A format-preserving encryption implementation in Go | Encryption library
kandi X-RAY | fpe Summary
kandi X-RAY | fpe Summary
An implementation of the NIST approved Format Preserving Encryption (FPE) FF1 and FF3 algorithms in Go. This follows the FF1 and FF3 schemes for Format Preserving Encryption outlined in the NIST Recommendation, released in March 2016. For FF1, it builds on and formalizes (differing from but remaining mathematically equivalent to) the FFX-A10 scheme by Bellare, Rogaway and Spies as defined here and here. For FF3, it formalizes the BPS scheme. A note about FF3: There was some recent cryptanalysis about the FF3 algorithm that is important to review. NIST has concluded that FF3 is no longer suitable as a general-purpose FPE method.
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QUESTION
I've finally cross-compiled and linked a binary on an Ubuntu Xenial x86_64 host to run on the Raspberry Pi 4's armhf.
My toolchain's from ARM and placed in $TOOLCHAIN
.
My sysroot is a loop-mounted Raspberry OS image placed in $RASPBIAN_ROOT
.
This is a sample compilation line:
...ANSWER
Answered 2021-Sep-27 at 08:29The solution I found was to cross-compile with the toolchain from raspberrypi.org and set --sysroot=
to a Raspbian image. Their releases more or less follow Debian's and always support all existing Raspberry Pies.
Both CXX
and LD
point to their g++
, meaning it's GCC who determines linking flags. If necessary I can use -Wl,..
Other than -Wabi-tag -D_GLIBCXX_USE_CXX11_ABI=0
, CFLAGS
is pretty standard.
Raspbian changed their download URL format between Buster 10.3 (2020-02-13) and 10.4 (2020-05-28) and started providing full and lite versions. I used the latter.
Since these images typically have almost no free space, I first extend the image file, partition (p2) and underlying filesystem, so I can install the -dev
packages that satisfy the dependencies of my project by chrooting into the sysroot via quemu-arm.
QUESTION
I have written the following query to extract a list of distinct military status from a SAS table.
...ANSWER
Answered 2021-Sep-24 at 18:47Looks like MILITARY_STAT_sERSS is only one byte long. And also the format, $MILSTAT., that you are using with that variable does not have any decode for 'G'.
Try making MILITARY_STATUS long enough to store "Grand Total".
QUESTION
I'm developing a site locally using WordPress and have used the plugin Advanced Custom Fields to create a group of fields that will display when post category is set to 'Front Page Events'. This category has a slug of fpe
.
I put the code below in my child theme's functions.php
to create a path to a single template folder:
ANSWER
Answered 2021-May-23 at 17:20Actually it looks like this might have been a theme-related issue. Because I'm using a child of twenty seventeen, it was necessary to put the single post file in template-parts/post/content-php. I've solved it now.
QUESTION
Code (t1.c):
...ANSWER
Answered 2021-Mar-01 at 22:48The code (unsigned long long)DBL_MAX
has undefined behaviour, as per C11 6.3.1.4:
When a finite value of real floating type is converted to an integer type other than
_Bool
, the fractional part is discarded (i.e., the value is truncated toward zero). If the value of the integral part cannot be represented by the integer type, the behavior is undefined
Since the behaviour is undefined, "anything can happen", i.e. the behaviour is not covered by the standard.
QUESTION
I am trying to download/view/export the google docs file. So I used the below export
API
ANSWER
Answered 2021-Feb-02 at 14:25mimeTypes
See the list of the ones available here:
https://developers.google.com/drive/api/v3/ref-export-formats
I suspect you are trying to view a binary file (vnd.oasis.opendocument.text
) as plain text, so maybe change your request to:
QUESTION
I have only started learning python hence the very basic question!
So I just started learning the basics of python and right now I am covering lists and how they work. I would like to print values in my list that start with the letters "F", "P" and "E".
My list consists of the names of all the countries in the EU. Here is what I have come up with, but unfortunetly doesn't work as expected, instead it prints nothing.
...ANSWER
Answered 2020-Dec-15 at 12:23Just check the first letter of the country (if it's in special characters) not the entire word:
QUESTION
I want to report a Job as complete and all invoices paid on that job and return the date/month the last invoice was paid to create a commission report.
...ANSWER
Answered 2020-Aug-21 at 16:36You need a subquery.
QUESTION
I was trying to handle the integer division by zero (please don't judge, I was told I had to use lib and I couldn't just use an if statement), but I needed to make sure the program would keep running (even though it's a very bad practice), instead of crashing or closing. The weird part is that the program should only handle division by zero but should exit for every other type of
SIGFPE
.
SideNote: Now, I have no idea why they use names like FPU
or FE
or FPE
when referring to integer "exceptions" (or I should say interrupts) since the standard says clearly that dividing a floating point number should return either inf
or nan
for 0 / 0
(tell me if I'm wrong).
Anyway, I wrote this test code so I could better understand what I needed to do before the actual implementation. I know, it's weird to have x
as a global variable but if I don't reset it, it will keep calling handle
for no reason like forever....
ANSWER
Answered 2020-Jul-09 at 16:02It's defined as:
The
SIGFPE
signal reports a fatal arithmetic error. Although the name is derived from “floating-point exception”, this signal actually covers all arithmetic errors, including division by zero and overflow. If a program stores integer data in a location which is then used in a floating-point operation, this often causes an “invalid operation” exception, because the processor cannot recognize the data as a floating-point number.
There's no reason for it to be labelled specifically FPE
but these sorts of labels can evolve in unpredictable ways. I wouldn't read too much into it.
These signals are part of the POSIX standard and may not be fully supported or implemented in Windows. The Windows implementation of these support facilities is lacking in a number of areas, like how fork()
is unsupported.
QUESTION
New to JS, found some sample code and modified it to suit to my purpose [1]. It is working fine, however the *dns.reverse(IP, (err) * is completely irrelevant for my code. Basically, I do not need dns module at all. I tried removing it several ways, did not work. Every time the code broke down. Ideas, how one could remove this unnecessary piece?
Many thanks in advance,
[1]
...ANSWER
Answered 2020-May-11 at 12:26You can remove the DNS call like so:
QUESTION
I am implementing the standard implementation of Google Cloud Platforms- Data Loss Prevention API in Python for De-Identifying text. This is from the example in https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/dlp/deid.py for the method deidentify_with_fpe
When I run the code with the parameters I mentioned below I am getting the following error.
Can someone suggest how to fix the error?
...ANSWER
Answered 2020-Mar-03 at 18:57Most likely, the key is not wrapped correctly. Can you please try the following commands to see that the decryption of the wrapped key generates the right output?
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