digest | Provides a framework for message digest libraries | Hashing library
kandi X-RAY | digest Summary
kandi X-RAY | digest Summary
This module provides a framework for message digest libraries. You may want to look at OpenSSL::Digest as it supports more algorithms. A cryptographic hash function is a procedure that takes data and returns a fixed bit string: the hash value, also known as digest. Hash functions are also called one-way functions, it is easy to compute a digest from a message, but it is infeasible to generate a message from a digest.
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QUESTION
I encountered a problem while trying to get my java project running on my Debian 10 server. Everything seems to work, but java throws an error when i try to get an instance of a MessageDigest with "SHA256".
It occurs in this line:
MessageDigest digest = MessageDigest.getInstance("SHA256");
The exception:
java.security.NoSuchAlgorithmException: SHA256 MessageDigest not available
Is there a way to install SHA256 functionality or another way i can create a sha256 hash?
...ANSWER
Answered 2021-Jun-15 at 19:42MessageDigest.getInstance("SHA-256");
QUESTION
I'm doing a project on Shiny where there are several drop-down menus. The options contained in the menus are stored in a data frame and when running the app you have the option to add more data to the data frame. The behavior I expected was that the options in the drop-down menu would automatically update with changes in the data frame, but this doesn't happen.
Is this possible to be done in Shiny? If yes, how?
Here's a code with an example of how I'm doing.
...ANSWER
Answered 2021-Jun-15 at 12:54You have several issues here.
- The second
selectInput
depends on the first one, so you need to update it also to display the updated dataframe. - It would be best to create a
reactiveValues
object as the dataframe to be updated. - You need an
observeEvent
to update the secondselectInput
, whenever the first one is updated.
Lastly, dataframe is updated only when the actionButton
on the second tab is clicked - to avoid updating dataframe while typing long text.
Try this
QUESTION
I know there are some other questions (with answers) to this topic. But no of these was helpful for me.
I have a postfix server (postfix 3.4.14 on debian 10) with following configuration (only the interesting section):
...ANSWER
Answered 2021-Jun-15 at 08:30Here I'm wondering about the line [in s_client]
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384
You're apparently using OpenSSL 1.0.2, where that's a basically useless relic. Back in the days when OpenSSL supported SSLv2 (mostly until 2010, although almost no one used it much after 2000), the ciphersuite values used for SSLv3 and up (including all TLS, but before 2014 OpenSSL didn't implement higher than TLS1.0) were structured differently than those used for SSLv2, so it was important to qualify the ciphersuite by the 'universe' it existed in. It has almost nothing to do with the protocol version actually used, which appears later in the session-param decode:
QUESTION
We are programmatically creating PDF using our in house lib (C++) by adding all the required objects so that PDF readers can render them properly. Currently we are enhancing the lib to support digital signatures in PDF. Our users will use USB token or Windows certificates to sign the PDF. On studying raw PDF file with digital signature, we were able to make sense of all the objects except for the contents of Sig type object.
...ANSWER
Answered 2021-Jun-10 at 16:48Ok, the signature container is embedded correctly.
But there are issues with the signature container itself:
Both in the
SignedData.digestAlgorithms
collection and in theSignerInfo.digestAlgorithm
value you have used the OID of SHA1withRSA, but that is a full signature algorithm, not the mere digest algorithm SHA1 expected there.Then the SHA1 hash of the signed bytes is BB78A402F7A537A34D6892B83881266501A691A8 but the hash you signed is 90E28B8A0D8E48691DAFE2BA10A4761FFFDCCD3D. This might be because you hash buffer2 and
buffer2 has empty contents data (/Contents <>)
The hex string delimiters '<' and '>' also belong to the contents value and, therefore, must also be removed in buffer2.
Furthermore, your signature is very weak:
- It uses SHA1 as hash algorithm. SHA1 meanwhile has been recognized as too weak a hash algorithm for document signatures.
- It doesn't use signed attributes, neither the ESS signing certificate nor the algorithm identifier protection attribute. Many validation policies require such special attributes.
QUESTION
I have written a code to hash a hexadecimal number using SHA-256 in Java. Please see my code.
...ANSWER
Answered 2021-Jun-12 at 08:25Without using BigInteger
:
QUESTION
I'm needing to verify an HTTP HMAC signature for a program I use (Drone CI, trying to create an extension), but nothing I'm trying is getting the results to match.
Specifically, the HTTP request looks like this:
...ANSWER
Answered 2021-Jun-11 at 01:55They appear to be using an implementation of the http signatures draft.
The linked document explains the way the signature needs to be calculated and how to verify it. But this is probably why your example doesn't work:
2.1.3. headers
OPTIONAL. The
headers
parameter is used to specify the list of HTTP headers included when generating the signature for the message.
Basically the signature doesn't include just the message, probably to prevent replay attacks. Since you just hash the message it is working as intended.
QUESTION
The objective of my code is to scrape the information in the Characteristics tab of the following url, preferably as a data frame
...ANSWER
Answered 2021-Jun-11 at 15:38The data is dynamically retrieved from an API call. You can retrieve direct from that url and simplify the json returned to get a dataframe:
QUESTION
I proceeded to follow the instructions for Keeping the source Up-to-Date and proceeded to compile the code. Now I'm unable to start the server. I get the following error message when starting the authserver.exe. Can anyone help me figure out what I've done? Please advise...
...ANSWER
Answered 2021-Jun-08 at 07:28You also need to import the database updates. Currently your auth server is trying to access tables and fields in your acore_auth
database which don't exist.
https://www.azerothcore.org/wiki/database-keeping-the-server-up-to-date
QUESTION
I just noticed that read_csv()
somehow uses random numbers which is unexpected (at least to me). The corresponding base R function read.csv()
does not do that. So, what does read_csv()
use the random numbers for? I looked into the documentation but could not find a clear answer to that. Are the random numbers related to the guess_max
argument?
ANSWER
Answered 2021-Jun-10 at 19:21tl;dr somewhere deep in the guts of the cli
package (called to generate the pretty-printed output about column types), the code is generating a random string to use as a label.
A major clue is that
QUESTION
I'm using Tomcat 10 and eclipse to develop a J2E (or Jakarta EE) web application. I followed this tutorial (http://objis.com/tutoriel-securite-declarative-jee-avec-jaas/#partie2) which seems old (it's a french document, because i'm french, sorry if my english isn't perfect), but I also read the Tomcat 10 documentation.
The dataSource works, I followed instructions on this page (https://tomcat.apache.org/tomcat-10.0-doc/jndi-datasource-examples-howto.html#Oracle_8i,_9i_&_10g) and tested it, but it seems that the realm doesn't work, because I can't login successfully. I always have an authentification error, even if I use the right login and password.
I tried a lot of "solutions" to correct this, but no one works. And I still don't know if I have to put the realm tag inside context.xml, server.xml or both. I tried context.xml and both, but i don't see any difference.
My web.xml :
ANSWER
Answered 2021-Jun-10 at 13:44As Piotr P. Karwasz said it, I misspelled dataSourceName in context.xml and server.xml file. I feel bad that I didn't notice it.
But I still have one question : In which document should I put the realm tag ?
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