Some of the authors of Blake got together and developed Blake2: Full details at blake2.net. At the website is a graph comparing Blake2b ( optimized for 64 bit platforms ) and Blake2s ( optimized for 32 bit platforms ). Both Blake2's are very fast. Blake2b is not only faster than SHA256 it is faster than SHA1 and MD5.
The reason I am looking at this now is because my current project is suffering by SHA2 being not fast enough.
Here is a link to four binaries: b2sum-bin_20130305.zip
b2sum-amd64-linux [64 bit platform]
b2sum-i686-linux [32 bit platform]
b2sum-amd64-windows [64 bit platform]
b2sum-i686-windows [32 bit platform]
There are also parallel versions for multi-core processors: Blake2bp( 4-way parallel ) and Blak2sp( 8-way parallel)
Here is an example using "b2sum-amd64-windows.exe", for 64 bit Windows. Note that I am talking about 64 bit Windows and not 64 bit mode. The two test vectors are from BLAKE (hash function) at WikiPedia.
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#include once "Windows.bi"
#define CrLf Chr(13,10)
Dim As String sFileName = "Empty.txt"
'Dim As String sFilename = "BrownFox.txt"
Dim As Double t
Chdir("F:\FreeBASIC\Blake2") ' change for your setup
t = Timer
Open Pipe "b2sum-amd64-windows.exe -a blake2b " + sFileName For Input As #1
Dim As String HashHex
Line Input #1, HashHex
t = Timer - t
MessageBox ( Null, Ucase(Left(HashHex, 128)) + CrLf + CrLf + Str(Int(t*1000))+ "ms", "Blake2b", MB_OK )
' = 786A02F742015903C6C6FD852552D272912F4740E15847618A86E217F71F5419
'BLAKE2b-512("The quick brown fox jumps over the lazy dog")
' = A8ADD4BDDDFD93E4877D2746E62817B116364A1FA7BC148D95090BC7333B3673
I also did a test on a 100MB file coming out of the filecache on each run to maintain a level playing field. Timings in milli-seconds.
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Blake2b 226 outputs 512 bits
Blake2s 267 outputs 256 bits
Blake2bp 144 outputs 512 bits
Blake2sp 140 outputs 256 bits
On my machine I would use Blake2bp and if I wanted 256 bit I would simply halve the output.
On my machine then Blake2bp is about 3.5 times faster than SHA2. For some strange reason SHA512 is faster than SHA256 for Microsoft's CNG; noticed with a few of my apps. This was not the case with Microsoft's CryptoAPI; prior to Windows Vista.