fast random

I am looking for a fast random string generator.
Currently I am using the md5 random feature, but I need to do it loads of times so something lighter would be usefull.

Anyone got an idea?

You can use CryptGenRandom to generate an arbitrary sized random buffer. It'll save you the overhead of multiple calls.

System::Alloc 2000

Pop $R0

System::Call "advapi32::CryptAcquireContext(*i.r0,i0,i0,i1,i0x40)"

System::Call "advapi32::CryptGenRandom(ir0,i2000,iR0)"

System::Call "advapi32::CryptReleaseContext(ir0,i0)"



# $R0 contains 2000 random bytes



System::Free $R0

I need a random string (chars and numbers) between 10 and 20 chars long.

For some reason yours only reports the same

It just allocates a buffer. You need to read from that buffer on your own. You can read it byte by byte and convert each byte into 2 hex-chars, just like you got from md5.

System::Call "*$R0(&i1.r0)"

IntFmt $0 "%02x" $0

Ok I now got;

System::Alloc 2000
Pop $R0
System::Call "advapi32::CryptAcquireContext(*i.r0,i0,i0,i1,i0x40)"
System::Call "advapi32::CryptGenRandom(ir0,i2000,iR0)"
System::Call "advapi32::CryptReleaseContext(ir0,i0)"

System::Call "*$R0(&i1.r0)"
IntFmt $0 "%02x" $0

messagebox MB_OK $0

but it keeps returning 00, I got it working but for some reason it broke.
And how do I expand this to a for example 20 chars long output?