Question
Is any alternatives of MySQL RANDOM_BYTES(len) or MSSQL CRYPT_GEN_RANDOM(len) available in MariaDB?
I read through their documentation, but I only found is rand(len), which is not cryptographically secure in generating random bytes.
Issues
Currently released version of MariaDB (10.3) does not support RANDOM_BYTES(len) according to this documentation https://mariadb.com/kb/en/library/function-differences-between-mariadb-103-and-mysql-57/
Limitation
If possible, keep the code within the MariaDB, and I don't want to rely on PHP or any other external functions for security reasons.
It seems RANDOM_BYTES(length) is available since 10.10.0 (preview release) Check the documentation.
Unfortunately from talking to MariaDB support there is currently no RANDOM_BYTES equivalent in MariaDB. See https://jira.mariadb.org/browse/MDEV-27002 for a semi-related ticket which has to do with generating random passwords for users.
To get around this, what you can do is create a custom UDF (user-defined function) in C which utilizes a cryptographically secure library to generate a random series of bytes for whatever use case you have. This technically keeps the code 'within MariaDB' though you need to write your own function to call. See https://mariadb.com/kb/en/creating-user-defined-functions/ for more info.
Related
I am trying to read sap change log using rfc + vbs as buffer.
I know that I need to use CHANGEDOCUMENT_READ_HEADERS and CHANGEDOCUMENT_READ_POSITIONS functions to do this, but have not found any research how to do this properly with the help of vbscript.
I have already found out how to read normal tables using BBP_RFC_READ_TABLE but it doesn’t work with CDPOS...
Any ideas?
First, if you want to use VBscript to integrate with SAP, you will go through RFC channel using SAP NWRFC library or SAP .Net Connector 3.0, and the SAP functions or BAPIs you can call must be remote enabled. Unfortunately, the two functions, CHANGEDOCUMENT_READ_HEADERS and CHANGEDOCUMENT_READ_POSITIONS, are not remote enabled. I could imagine CDPOS is difficult for you because CDPOS has wide fields which cannot be processed by BBP_RFC_READ_TABLE.
Once we are aligned with the objective challenges, there are two options to help you move forward:
Write your own custom "Z" function module, which is remote enabled, and call CHANGEDOCUMENT_READ_HEADERS and CHANGEDOCUMENT_READ_POSITIONS inside the function;
Use third party commercial library (our company AecorSoft developed such ADO.NET compliant library for SAP integration).
I would suggest you explore #1 first. You can follow this blog https://blogs.sap.com/2017/02/09/how-to-use-dotnet-connector-nco-inside-vba/ to get started.
Dunno about BBP_RFC_READ_TABLE but RFC_READ_TABLE perfectly reads CDPOS
If you need to header-based query you will need 2 sequential reads: first for CDHDR headers and the second for positions, constructing second query from the first.
Suppose you want to add custom database support in Laravel 5. Whether it is MongoDB, Oracle or sqlite mod (SQLCipher). How would you go about it?
What I'm looking for is proper, elegant solution. Without core-hacking, which is easy to do, but would force you to manually analyze the codebase and rewrite it on every Laravel update.
Background
Actually, got this question trying to implement sqlcipher support in Laravel. Analyzed alternative crypto solutions, found no good enough way to manage MySQL or Postgre keys, so decided to go with encrypted sqlite. In fact, one might probably copy sqlite routine and just change the lib + add key request, but as I said before, I don't want to hack the core. It's just plain wrong.
I would like to use Meteor (Node.JS) to develop an application that will be used by 3,000+ concurrent users on a large size database.
I have looked at the nice examples and the idea to push changed data to the clients is very nice and very useful, but before I start the development I want to be sure how it works behind the scenes to be sure that when I have the application running with all these users it work fast with standard hardware.
I also require this to use Oracle as a database, but not sure that it is supported and if not, what are the requirements from an Oracle package to enable this facility.
I think that the server is having an active on going non-blocking query on the OPLOG table in mongodb and that is how we get the callback for all the changes in the database. Is that correct ? if so, is there a similar way to do it in Oracle ?
Thanks Roni.
I also require this to use Oracle as a database, but not sure that it is supported and if not, what are the requirements from an Oracle package to enable this facility.
Nope, meteor is currently mongo-only as they have implemented an in-browser library called minimongo. My guess is this project will never support oracle, but who knows. There is no mention of oracle support on the meteor project roadmap
Just happened to come across this question while searching at google.
However, if there are no native solutions. We can always figure out a way for a medium language to issue publishing.
Example Case:
Python will be used for synchronising data between Mongodb and Oracle (24/7 operation using cx_Oracle and MongoDB drivers from python)
Meteor Server will keep watch on what to publish
Meteor clients/browsers that subscribed to the channel that will be updated with oracle data.
I don't really plan on using active record or any of the built in database constructs native to CodeIgniter for database access. I have Oracle, SQL Server, and others. I want to use PHP PDO (unless anyone thinks that's bad) because of the universal aspect of it.
I mainly want CI because of some of the built in libraries and MVC. I also like that it is small and easy to work with.
2.x if it matters.
I did see other questions but none exactly about databases.
Thanks.
edit: It's not that I don't think CI and PHP can take it with large websites. This is solely about using multiple databases of varying companies. I have mostly seen MySQL used with it. I know I can use other databases but again, I don't know if it is more trouble than worth or what.
MySQL is the default just because of how widely-adopted it is, especially in the PHP world. Almost everyone has a *AMP stack to work on so it ends up being the main driver used in almost every example out there.
If you're not planning on using the database class, then it really doesn't matter what type of database you are using, just don't load the class. You can still use routing, helpers, libraries, and other CI features.
So yes, I do think it is suitable for your purposes.
CodeIgniter was built with the idea of being the framework closest to native PHP that doesn't tell you what to do. The entire framework is modular and you are not required to use any single component.
Yes, it is absolutely suited to what you are doing. You can plug and play whatever DB driver you want and CI will not complain one bit.
I think CI is more suited for this role than any other of the 'big' frameworks.
Is there any good library for Ruby to work with BitTorrent trackers? To download or seed files. There's a rubytorrent library on rubyforge, but it was last updated in 2005 and doesn't seem like working anymore.
see lib-torrent ruby...
https://github.com/maran/libtorrent-ruby
I'm not sure if this is what you want.
Also see this post which contains some potentially useful comments as well, including a Ruby wrapper for the Transmission API using RPCs.
My experience with libtorrent derived clients has been very positive, I would like to see something new here. (I prefer the high density interface & advanced features of qbittorrent to the sparse UI of Transmission.)
A torrent client that exchanges DHT buckets to crawl the public DHT... ?
(No web searching required.)