| --- Log opened Thu Mar 29 00:00:27 2018 |
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| 05:31 | < McMartin> | jerith: the lack of compile_string/1 makes getting asm out of Erlang in some sense easier |
| 05:32 | < McMartin> | You have to put the source to compile in a module anyway, and once you have that, `compile:file("foo.erl", 'S').` will create foo.S for you. |
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| 12:31 | <@Pi> | Imma giving a talk: https://www.meetup.com/ctfeds/events/245727127/ |
| 12:33 | < Vornlicious> | Thought it meant Connecticut and was thus nearly disappointed in another way |
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| 17:33 | <@TheWatcher> | https://twitter.com/qrs/status/979037861055029248 snrrk |
| 17:34 | <&McMartin> | Can confirm |
| 17:35 | | * McMartin also stares at the Rust 1.25 release notes, as they do a thing that is an obvious parallel to a common complaint but which has never come up in his experience. |
| 17:35 | <&McMartin> | To wit, we always complain about map literals that forbid a spurious comma at the end, because it makes them way more inconvenient to generate |
| 17:36 | <&McMartin> | But I don't think I've seen people complain about how this is illegal: |
| 17:36 | <&McMartin> | match x { | Foo::A => a() | Foo::B => b() } |
| 17:36 | <&McMartin> | (That is, opening with an "or" on the alternatives list) |
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| 20:07 | < Vornlicious> | When you do that in dynamically generated stuff you usually put `false` before it |
| 20:08 | | * ToxicFrog | Parsing is considered a solved problem. Unfortunately, this view is naïve, rooted in the widely believed myth that programming languages exist. |
| 20:08 | <&ToxicFrog> | (from https://cacm.acm.org/magazines/2010/2/69354-a-few-billion-lines-of-code-later/fulltext ) |
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| 21:13 | < RchrdB> | that article is full of gold |
| 21:14 | < RchrdB> | "True story: A networking company agreed to buy the Coverity product, and one week later laid off 110 people (not because of us). Good or bad? For the fired people it clearly wasn't a happy day. However, it had a surprising result for us at a business level; when these people were hired at other companies some suggested bringing the tool in for a trial, resulting in four sales." |
| 21:14 | < RchrdB> | perverse incentives dot jay peg |
| 21:15 | < RchrdB> | come to think of it, a fairly depressing fraction of sales at $lastjob resulted only from previous customers switching jobs to go work in different local councils or govt departments |
| 21:37 | <&[R]> | while read server; do if ssh -no StrictHostKeyChecking=No -o PasswordAuthentication=no ${server} echo -n 2>/dev/null; then printf 'PASS\t%s\n' ${server}; else printf 'FAIL\t%s\n' ${server}; fi; done < servers # someone might find this useful |
| 21:38 | < Degi> | Does it check if servers have ssh password authentication? |
| 21:42 | <&[R]> | Nope |
| 21:42 | <&[R]> | Checks to see if you can log-in to the servers without a password (IE via pub-key) |
| 21:43 | < [> | why w/ host key check disabled? |
| 21:44 | <&[R]> | `echo -n` should be replaced with `true` actually |
| 21:44 | <&[R]> | Because if the host isn't in known_hosts ssh asks questions |
| 21:44 | <&[R]> | You don't want it asking questions |
| 21:47 | <&[R]> | Note: servers can also contain user@host if you want |
| 21:52 | < RchrdB> | Something to check for safety: that doesn't enforce that hosts are in ~/.ssh/known_hosts with known keys before you connect to them, but *does it add them there*? |
| 21:53 | < RchrdB> | I think that will happily log into ssh honeypots. Just because the server accepted your pubkey doesn't mean you necessarily want to log in. ;) |
| 21:54 | < RchrdB> | useful though |
| 21:54 | < RchrdB> | at $lastjob we ended up with a think in ansible that set up ssh authorized_keys for every server. |
| 21:54 | | Kindamoody|afk is now known as Kindamoody |
| 21:56 | < [> | yeah i was thinking i'd rather it fail for unknown hosts rather than log in and potentially save the host key |
| 21:56 | <&[R]> | No |
| 21:58 | <&[R]> | $ mv ~/.ssh/known_hosts{,2}; touch ~/.ssh/known_hosts; while read server; do if ssh -no StrictHostKeyChecking=No -o PasswordAuthentication=no ${server} echo -n 2>/dev/null; then printf 'PASS\t%s\n' ${server}; else printf 'FAIL\t%s\n' ${server}; fi; done < servers >/dev/null; cat ~/.ssh/known_hosts |
| 21:58 | <&[R]> | $ |
| 22:01 | <&[R]> | Also I somewhat assume that you want to be able to log into all the hosts in servers |
| 22:01 | <&[R]> | IE: no honey-pots |
| 22:02 | <&[R]> | (Also I touch known_hosts in the example above, because in the test before that, ssh didn't make the file) |
| 22:04 | < RchrdB> | [R], nice |
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| 22:25 | <&[R]> | Hmm, looking at my known_hosts file because I thought it might be neat to parse it |
| 22:26 | <&[R]> | But it looks like it's in two entirely different formats? |
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| 22:27 | <&[R]> | Hmm, or maybe not? Just the hostname/IP part is in different formats |
| 22:28 | <&[R]> | One is just plain text, the other is |1|{BASE64}|{BASE64} |
| 22:28 | < RchrdB> | Other thing you might expect to see is that the lines for hosts where the host key is an RSA key are way longer than the ones for hosts which use an ECDSA key. |
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| 22:31 | <&[R]> | Interesting, I didn't actually notice that |
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| 22:31 | <&[R]> | Should I update those servers to have RSA keys? |
| 22:31 | <&[R]> | (Or at least bigger keys in general) |
| 22:33 | < RchrdB> | no, RSA takes way more bits and cycles to get the same level of security that ECDSA does |
| 22:33 | < RchrdB> | at least, as far as anyone can tell |
| 22:33 | <&[R]> | Ah |
| 22:33 | <&[R]> | Interesting |
| 22:34 | < RchrdB> | notwithstanding the fact that "is ANYTHING even slightly secure? might someone invent a working quantum computer tomorrow morning?" is a perpetually open problem in computer security |
| 22:34 | < RchrdB> | s/computer security/cryptography/ |
| 22:39 | <&[R]> | Yeah |
| 22:47 | <&[R]> | https://en.wikibooks.org/wiki/OpenSSH/Client_Configuration_Files#/etc/ssh/ssh_known_hosts <-- some interesting things to play with here |
| 22:59 | <&[R]> | TIL you don't need the // after http: |
| 23:00 | <&[R]> | Or at least FF will add it for you |
| 23:04 | <@Tamber> | <unrelated> ...420 lines of 'code' (typedefs, struct declarations, and a couple of data tables), 40 lines of comment, 83 blank lines. ...this is an abomination. </unrelated> |
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| 23:24 | <@TheWatcher> | Tamber: eww |
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| --- Log closed Fri Mar 30 00:00:28 2018 |