<< 23-11-2016 >>
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05:20:48FromGitter<nigredo-tori> Benjamin, only inside the same `type` section: ⏎ ⏎ ```code paste, see link``` [https://gitter.im/nim-lang/Nim?at=5835272fc790e0ec561e7c66]
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08:52:35ArrrrIs there a reason for os.CurDir not being a string? One could 'CurDir / "music"' instead of '$CurDir / "music"'
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09:40:52AraqArrrr: chars are faster
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09:52:01ArrrrAnd when do you actually need CurDir to be fast?
09:52:23ArrrrOr maybe there could be added a './' which is a string
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10:11:15AraqArrrr: I don't think it's worth changing, CurDir is '.' on every OS out there anyway
10:11:31Araqfeel free to write "." or "./" or whatever instead
10:12:02Araqbtw $CurDir is optimized to "." at compiletime
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10:16:36ArrrrOk, it was only to save two keystrokes.
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14:02:10paulmrhi, when I compile this simple program it causes the compiler to
14:02:10paulmrcrash (tried on both linux and freebsd): https://gist.github.com/paulmr/9aa6e3f9e7cf4746ddcf137d3335f2e1
14:02:20paulmrdoes it seem like a known issue?
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14:07:18euantorpaulmr: Try this: https://glot.io/snippets/ekl1a4030o
14:07:31FromGitter<endragor> I think you meant `next: ref T[A]`, an object cannot recursively include itself
14:09:16paulmrahh yes that makes sense, thank you
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19:33:06fvsWhy this fails?: import random;randomize();echo random(100.0)
19:34:45fvsknock, knock
19:35:47def-fvs: Who's there?
19:35:50fvsI'm using: Nim Compiler Version 0.15.0 (2016-10-04) [Linux: amd64]
19:37:49fvsexpecting 0-100 but keep getting 4.440892098500626e-13
19:38:09def-fvs: same here, probably a bug in the random module
19:38:18def-or the randomize doesn't work
19:38:51fvsok, good to know I'm not loosing my mind :)
19:40:43def-it's in the definition of proc random*(max: float): float
19:41:47def-'u' is always the same value if x is smaller than 2^12, which always seems to be the case for the initial seed
19:42:31def-i don't know much about prngs, so no idea how to fix that properly
19:49:15dom96wow, that's a serious bug.
19:52:56dom96or perhaps not
19:54:11dom96Different seeds don't seem to affect the random generator
19:54:19dom96But calling random multiple times gives different results.
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20:48:09dom96Here is my answer https://github.com/nim-lang/Nim/pull/5048
20:48:26dom96Thoughts very much welcome and encouraged.
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21:13:12FromGitter<ephja> userspace prng's can't be secure?
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21:16:29federico3ephja: userspace prngs can be insecure
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22:10:38Araqmuhaha, this is great
22:10:43Araq"I'll cover some alternative approaches for the above problems later. But if you managed to open and read all the data needed, everything is great, right? Wrong! How do you even know if /dev/(u)random is random in the first place? This may sound like a strange question, but it isn't. You can't just trust a file because of it's path. Consider an attacker ran the following:..."
22:12:05cheatfateAraq, that's why most of systems made syscalls to generate random data
22:12:35Araqit's the old Unix vs API story. APIs work, Unix doesn't.
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22:14:09cheatfateephja: every available crypto library using userspace cprngs
22:14:19cheatfatecsprngs
22:14:55cheatfateephja: until you have some kind of custom hardware module and crypto library has interface to it
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22:36:49federico3cheatfate: libsodium uses the kernel prng
22:38:40cheatfatefederico3, interesting, if it uses kernel prng, why it needs this https://github.com/jedisct1/libsodium/blob/master/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
22:39:30federico3https://download.libsodium.org/doc/generating_random_data/ and https://download.libsodium.org/doc/advanced/custom_rng.html
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22:47:43cheatfatefederico3, it looks like libsodium dont have any api to create keys
22:48:27federico3to create keys? What kind of keys? if you are looking for a privkey it does
22:48:51cheatfatefederico3, sorry i can't find any procedures on key generation, could you point me?
22:48:57federico3sure, one sec
22:50:02federico3https://download.libsodium.org/doc/public-key_cryptography/public-key_signatures.html
22:50:13federico3one mor second...
22:52:01federico3on the same page "Using crypto_sign_seed_keypair(), the key pair can also be deterministically derived from a single key seed (crypto_sign_SEEDBYTES bytes)."
22:52:49Araqyay, nimble itself uses recursive module deps
22:53:27Araqwill replace the error with a warning then to give people to update their projects
22:53:38Araq*to give time
22:53:49dom96Araq: huh?
22:54:17Araqthe compiler now detects and forbids recursive module dependencies
22:55:50Araqor should I fix nimble instead?
22:56:45cheatfatefederico3, do you have randombytes_default.h?
22:56:56cheatfatei can't find it in repo
22:57:00cheatfateso i think it generated
22:58:44dom96Araq: I think Nimble either gets stuck in an infinite loop in that case or does give an error, the former would be a bug.
22:59:33AraqI think you misunderstand me:
22:59:57Araqnimblepkg\tools.nim(6, 17) Error: recursive module dependency detected:
22:59:58Araqpackageinfo.nim imports tools.nim
23:00:00Araqtools.nim imports packageinfo.nim
23:01:38cheatfatefederico3, but looks like you are right and libsodium uses kernel prng, but they have user-space prng inside, just because you can't use kernel prng inside of VM
23:03:15dom96Araq: oh. Yeah, fix it please. What would be nice is if we could import specific definitions that don't need the recursive dependency, but I guess that would be extremely complicated to implement.
23:03:48dom96I would love to be able to do from module import myProc to get around the dependency error as long as `myProc` isn't using the recursive dependency
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23:07:02Araqnah, we will get something better in the longer run instead.
23:07:17Araqbut let's not repeat D's mistake with local import statements
23:07:43Araqit screwed up scoping rules in D.
23:08:59dom96ok
23:10:03federico3cheatfate: yes, unfortunately both kernel and userspace prng have their drawbacks
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