CRC .NET

[Larry]

Hello,
Is there a framework class that implements CRC 32 algorithms. I could not
find on msdn, I just want to make sure that I didn't miss it.
If not can anyone explain how CRC32 algorithm can be implemented.

Thank you

[Jon Skeet [C# MVP]]

Re: CRC .NET

Larry <lp@nospam.co m> wrote:[color=blue]
> Is there a framework class that implements CRC 32 algorithms. I could not
> find on msdn, I just want to make sure that I didn't miss it.
> If not can anyone explain how CRC32 algorithm can be implemented.[/color]

There are plenty of sample implementations around on the web, including
ones in C#.

Do a google search for crc32 and C#, and you'll find lots.

--
Jon Skeet - <skeet@pobox.co m>

http://www.pobox.com/~skeet

If replying to the group, please do not mail me too

[William Stacey [MVP]]

Re: CRC .NET

I would use SHA1.ComputeHas h(stream).

--
William Stacey [MVP]

"Larry" <lp@nospam.co m> wrote in message
news:ubbO5QKbFH A.1384@TK2MSFTN GP09.phx.gbl...[color=blue]
> Hello,
> Is there a framework class that implements CRC 32 algorithms. I could not
> find on msdn, I just want to make sure that I didn't miss it.
> If not can anyone explain how CRC32 algorithm can be implemented.
>
> Thank you
>
>
>
>[/color]

[Jon Skeet [C# MVP]]

Re: CRC .NET

William Stacey [MVP] <staceywREMOVE@ mvps.org> wrote:[color=blue]
> I would use SHA1.ComputeHas h(stream).[/color]

It depends on what the requirement is. If it's just "a hashing
algorithm" then SHA1 would indeed be a pretty good choice - but there
are other hashes which are cheaper to calculate but still good at
preventing *accidental* corruption (rather than deliberate tampering).
Adler32 is better than CRC32 in this respect, I believe.

However, my guess is that the OP actually needs to work out a CRC32
hash to match something else which is already working out a CRC32
hash...

--
Jon Skeet - <skeet@pobox.co m>

http://www.pobox.com/~skeet

If replying to the group, please do not mail me too

[William Stacey [MVP]]

Re: CRC .NET

If Larry still needs some CRC32, I posted a small sample project at:
http://spaces.msn.com/members/staceyw/Blog/cns!1pnsZpX0fPv DxLKC6rAAhLsQ!4 02.entry

--
William Stacey [MVP]

"Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
news:MPG.1d11ef efc4e2734698c2a 7@msnews.micros oft.com...[color=blue]
> William Stacey [MVP] <staceywREMOVE@ mvps.org> wrote:[color=green]
>> I would use SHA1.ComputeHas h(stream).[/color]
>
> It depends on what the requirement is. If it's just "a hashing
> algorithm" then SHA1 would indeed be a pretty good choice - but there
> are other hashes which are cheaper to calculate but still good at
> preventing *accidental* corruption (rather than deliberate tampering).
> Adler32 is better than CRC32 in this respect, I believe.
>
> However, my guess is that the OP actually needs to work out a CRC32
> hash to match something else which is already working out a CRC32
> hash...
>
> --
> Jon Skeet - <skeet@pobox.co m>
> http://www.pobox.com/~skeet
> If replying to the group, please do not mail me too[/color]

[Larry]

Re: CRC .NET

Thanks. I also found good resources and code on the web. They all produce
identical CRC32 chechsum. Thanks.


"William Stacey [MVP]" <staceywREMOVE@ mvps.org> wrote in message
news:OIa5VrPbFH A.2288@TK2MSFTN GP14.phx.gbl...[color=blue]
> If Larry still needs some CRC32, I posted a small sample project at:
> http://spaces.msn.com/members/staceyw/Blog/cns!1pnsZpX0fPv DxLKC6rAAhLsQ!4 02.entry
>
> --
> William Stacey [MVP]
>
> "Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
> news:MPG.1d11ef efc4e2734698c2a 7@msnews.micros oft.com...[color=green]
>> William Stacey [MVP] <staceywREMOVE@ mvps.org> wrote:[color=darkred]
>>> I would use SHA1.ComputeHas h(stream).[/color]
>>
>> It depends on what the requirement is. If it's just "a hashing
>> algorithm" then SHA1 would indeed be a pretty good choice - but there
>> are other hashes which are cheaper to calculate but still good at
>> preventing *accidental* corruption (rather than deliberate tampering).
>> Adler32 is better than CRC32 in this respect, I believe.
>>
>> However, my guess is that the OP actually needs to work out a CRC32
>> hash to match something else which is already working out a CRC32
>> hash...
>>
>> --
>> Jon Skeet - <skeet@pobox.co m>
>> http://www.pobox.com/~skeet
>> If replying to the group, please do not mail me too[/color]
>
>[/color]

[Larry]

Re: CRC .NET

Thanks. I also found good resources and code on the web. They all produce
identical CRC32 chechsum. Thanks.


"William Stacey [MVP]" <staceywREMOVE@ mvps.org> wrote in message
news:OIa5VrPbFH A.2288@TK2MSFTN GP14.phx.gbl...[color=blue]
> If Larry still needs some CRC32, I posted a small sample project at:
> http://spaces.msn.com/members/staceyw/Blog/cns!1pnsZpX0fPv DxLKC6rAAhLsQ!4 02.entry
>
> --
> William Stacey [MVP]
>
> "Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
> news:MPG.1d11ef efc4e2734698c2a 7@msnews.micros oft.com...[color=green]
>> William Stacey [MVP] <staceywREMOVE@ mvps.org> wrote:[color=darkred]
>>> I would use SHA1.ComputeHas h(stream).[/color]
>>
>> It depends on what the requirement is. If it's just "a hashing
>> algorithm" then SHA1 would indeed be a pretty good choice - but there
>> are other hashes which are cheaper to calculate but still good at
>> preventing *accidental* corruption (rather than deliberate tampering).
>> Adler32 is better than CRC32 in this respect, I believe.
>>
>> However, my guess is that the OP actually needs to work out a CRC32
>> hash to match something else which is already working out a CRC32
>> hash...
>>
>> --
>> Jon Skeet - <skeet@pobox.co m>
>> http://www.pobox.com/~skeet
>> If replying to the group, please do not mail me too[/color]
>
>[/color]