This question is a follow-up/in relation to my previous question here: http://stackoverflow.com/questions/3518498/sql-server-is-there-a-need-to-verify-a-data-modification I did some googling, and the paper (which I can't access) "When the CRC and TCP checksum disagree" indicates the occurrence of an unchecked error rate of 1 in 16 milli...
What is the most comprehensive MD5 tutorial out there? I have been trying to implement a decent MD5 checksum program but I have not come across a tutorial that makes it really clear. Any pointers would be appreciated, Thanks. To clarify I would like to know how to implement it. ...
Not sure where to post this question... I'd like to know if test only ABA Routing and Transit Numbers (RTN) exist. In otherwords, the number will pass the checksum test, but it is for application testing only and will never be assigned to a financial institution by the registrar that manages the ABA RTNs. I'm enhancing a web application...
Hi, I need to create a checksum for an XML file in Java. The basic requirements are: The order of elements matters; The name-value pair of attributes is important, but the order of attributes is NOT; Ignore all white spaces and comments Anyone can provide any hint or sample code? Thanks, Mark ...
Hello, This is going probably be a general question regarding checksum used for error detection. I got a lab assignment where we are going to recreate a protocol similar to how RDT2.0 works. And I'm stuck in how to use checksum to detect errors. The functions are there already what I need is to implement the functionality. What I don't...
In the my application, i save urls content into specific table of database. to have minimum duplication, i want to compute checksum for each content. so what is best sqlserver data-type for saving checksum's? and fastest way to computing checksum's for contents(html) of urls? ...
I would like to compute the CRC-16 checksum of a byte array, with 0xA001 polynomial. But I don't really know how to do it in Java, and how the given polynomial is used. Is it some kind of special value (0xA001)? Can you point me to a library that can compute the checksum for me, or point me to some useful resources? Thanks in advance, M...
hi, i have a table that have one column (AbsoluteUrl NVARCHAR(2048)) and i want to querying on this column, so this took long time to comparing each records with my own string. at least this table have 1000000 records. Now i think there is better solution to making a checksum for each AbsoluteUrl and compare to checksum together instead...
This one would have me tearing out my hair, if I had any. We need to log in to a site from an advertising supplier. From within our office LAN I see the following ... I have no issues logging in to this site from my desktop PC running XP, but my boss - who is the one who needs to log into this site, cannot. On my boss's system, which ...
I'm trying to build up the proper data structure using a pseudo tcp header, tcp header, and tcp data to be sent to a check sum function to be verified. I cannot figure out what I'm doing wrong in my code. The following code is my function that builds up the data structure and then sends it to another function to be checked. void print_...
Google has failed me and I can't find an answer even here on SO - relegating me to actually posting my first question here. I'm trying to get the command "mvn install" to automatically generate the checksums for the artifacts and place the checksums in the repository right along with the artifacts. Everything I've read seems to indicat...
I am trying to commit a file that is out of date. I tried cleaning the directory and nothing is working... the most recent file on my local machine is the one i know i want to use.. what is the standard way of overriding the conflict... should i just delete and re-add or is there another way "resource is out of date try updating" UPDATE...
The local copy is what I want to add, I dont care that its out of date. I know manually that this file is the latest and most up to date but I cant add it back to the server bc I dont have the most recent version checked out... ...
I need to calculate the checksum of an IP packet as described in http://www.faqs.org/rfcs/rfc1071.html. I have already the following code: #!/usr/bin/python import struct data = "45 00 00 47 73 88 40 00 40 06 a2 c4 83 9f 0e 85 83 9f 0e a1" # a test for the checksum calculation def _checksum(data): #calculate the header sum i...
For example: code = '7777-5'; input = code.substring(0, 4); // Returns '7777' checkdigit = f(input); // f() produces a checkdigit assert.areEqual(code, input + "-" + checkdigit) Is there a technical term for input used above? Specifically I'm calculating checkdigits for ISBNs, but that shouldn't effect the answer. ...
Hi, i need to calculate a checksum for a directory in question. It should return one number for this directory, not for each file inside it. Can you, quys, help me with it ? Thanks. ...
I have some question regarding how Internet checksum is calculated. I couldn't find any good explaination from the book, so I ask it here. I'm not sure if this is the correct place to ask, so I'm sorry if I asked it in wrong place. If you look at the following example. The following two message is sent 10101001, and 00111001. The checks...
I am calculating UDP checksum using the following function (found it somewhere): uint16_t udp_checksum(const void *buff, size_t len, in_addr_t src_addr, in_addr_t dest_addr) { const uint16_t *buf=(const uint16_t *)buff; uint16_t *ip_src=(uint16_t *)&src_addr, *ip_dst=(uint16_t *)&d...
What is the most suitable hash function for file integrity checking (checksums) to detect corruption? I need to consider the following: Wide range of file size (1 kb to 10GB+) Lots of different file types Large collection of files (+/-100 TB and growing) Do larger files require higher digest sizes (SHA-1 vs SHA 512)? I see that the S...
Godd Morning, I am trying to perform a check sum on the following function Data = [<<"9">>,"81", <<1>>, <<"52=">>, [[50,48,49,48,49,48,50,54,45,49,53,":",52,53,":",52,52]], <<1>>, <<1>>, [<<"9">>,<<"0">>,<<1>>], [<<"5">>,<<"4">>,<<1>>]] Using: checksum(Data) -> checksum(Data, 0). checksum([...