#SecureRandom is very slow when executed in remote server

1 messages · Page 1 of 1 (latest)

hearty nebula
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Hello

In the context of building an app to generate 4 digits random code as OTP code, I face something strange: when I try on my local dev environment, the generation is fast, but on server it takes around 15 mins! Any help please?

terse ruinBOT
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<@&987246964494204979> please have a look, thanks.

terse ruinBOT
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While you are waiting for getting help, here are some tips to improve your experience:

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fiery dock
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you might be falling victim to not collecting entropy quickly enough

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we actually had this problem where I work and had to modify the random source

hearty nebula
fiery dock
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check out the SO post

hearty nebula
fiery dock
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yeah

hearty nebula
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I don't get it, what should I do exactly ?

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If you want a PRNG, do something like this:

SecureRandom.getInstance("SHA1PRNG");

fiery dock
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yeap try starting with this

hearty nebula
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The problem is: my team doesn't agree on this approach :/ I mean the use of SecureRandom

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especially now after having this issue

fiery dock
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did you try the solution

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and see if it improves the situation

hearty nebula
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I can but I have no issue in my local env

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I want to test on server, but I'm afraid this will not solve the issue

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btw I think the problem is maybe cause of linux

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What do you think?

fiery dock
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the source of the problem is mentioned in many, many replies to that SO, which is the slow default entropy collection on linux machines

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you don't have the problem locally because you have a different entropy storage, different sources of it and potentially a different OS with different collection algorithms

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I recommend starting with the approved answer

hearty nebula
hearty nebula
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Got it! thank you @fiery dock