How to convert SHA1 value to integer with base 16?

[aps]

Hi ,,

i am looking for the way if i could convert sha1 value to integer with base 16 to do the further arithmetic operations on it using eval. 

i tried :

..... |eval sha=sha1("xyz123")|eval dec_number=tonumber(sha,16)

but dec_number is returning nothing. Could anyone suggest something ?

[richgalloway]

A SHA1 value would be an integer too big to represent in 64 bits, which probably is why tonumber fails.

What problem are you trying to solve?

[aps]

Hi @richgalloway 

i need to filter some events based on "string SHA1" > decimal[16] integer value's mode operations. 

Something like -    
(SHA_Value.to_interger(16) % 100) 

i was checking if i could achieve it by using "tonumber" function with eval for mode operation. if you could suggest some other method or trick would be appreciated. 

[yuanliu]

As @richgalloway indicates, the problem is the scale of SHA1 that SPL cannot handle.  I did some test, and uncovered extremely buggy behavior when an integer approaches and exceeds 10 trillion, or 10^13. (What are limitations of numeric calculation/representations?)  In comparison, SHA1 is 40 digits HEX.  Your best bet is an external command.