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crypto: clear error stack in ECDH::Initialize #4689

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crypto: clear error stack in ECDH::Initialize #4689

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indutny
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@indutny indutny commented Jan 14, 2016

Clean up OpenSSL error stack in ECDH::Initialize, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: #4686

@indutny
crypto: clear error stack in ECDH::Initialize
db53ee0 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: nodejs#4686
@indutny indutny mentioned this pull request Jan 14, 2016
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indutny commented Jan 14, 2016

R: @nodejs/crypto
CI: https://ci.nodejs.org/job/node-test-pull-request/1232/

@indutny indutny added tls Issues and PRs related to the tls subsystem. c++ Issues and PRs that require attention from people who are familiar with C++. lts-watch-v4.x labels Jan 14, 2016
@thefourtheye
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LGTM if CI is green.

@shigeki
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shigeki commented Jan 14, 2016

Does it mean the Oakley curve is broken in openssl?

$ openssl ecparam -list_curves
 ...
  Oakley-EC2N-3:
        IPSec/IKE/Oakley curve #3 over a 155 bit binary field.
        Not suitable for ECDSA.
        Questionable extension field!
  Oakley-EC2N-4:
        IPSec/IKE/Oakley curve #4 over a 185 bit binary field.
        Not suitable for ECDSA.
        Questionable extension field!

Instead of ignoring it, how about the idea to have ERR_peek_error() and throw an error in ECDH::New?

@mscdex mscdex added the crypto Issues and PRs related to the crypto subsystem. label Jan 14, 2016
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indutny commented Jan 14, 2016

@shigeki I don't really want to introduce more ERR_peek_error() checks until we decide what to do with the ERR stack in general. Every check added means that it may throw error on dirty stack.

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deian commented Jan 14, 2016

thanks!

shigeki pushed a commit that referenced this pull request Jan 15, 2016
@indutny
crypto: clear error stack in ECDH::Initialize
ebd9add 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: #4686
PR-URL: #4689
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Shigeki Ohtsu <[email protected]>
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shigeki commented Jan 15, 2016

@indutny I found the error is intentional and ignoring it is a right choice, which comes from

https://github.com/openssl/openssl/blob/OpenSSL_1_0_2-stable/crypto/ec/ec_lib.c#L321-L325

We ignore the return value because some groups have an order 
with factors of two, which makes the Montgomery setup fail. 
|group->mont_data| will be NULL in this case.

CI was green except existing failures on WIn. LGTM and landed in ebd9add. Thanks.

@shigeki shigeki closed this Jan 15, 2016
@indutny indutny deleted the fix/gh-4686 branch January 15, 2016 05:10
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indutny commented Jan 15, 2016

Thank you!

@evanlucas evanlucas mentioned this pull request Jan 18, 2016
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evanlucas pushed a commit that referenced this pull request Jan 18, 2016
@indutny @evanlucas
crypto: clear error stack in ECDH::Initialize
8bf5b33 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: #4686
PR-URL: #4689
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Shigeki Ohtsu <[email protected]>
MylesBorins pushed a commit that referenced this pull request Jan 28, 2016
@indutny
crypto: clear error stack in ECDH::Initialize
acdf5e3 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: #4686
PR-URL: #4689
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Shigeki Ohtsu <[email protected]>
MylesBorins pushed a commit that referenced this pull request Feb 11, 2016
@indutny
crypto: clear error stack in ECDH::Initialize
5d2f581 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: #4686
PR-URL: #4689
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Shigeki Ohtsu <[email protected]>
MylesBorins pushed a commit to MylesBorins/node that referenced this pull request Feb 11, 2016
@indutny
crypto: clear error stack in ECDH::Initialize
e5dc2ad 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: nodejs#4686
PR-URL: nodejs#4689
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Shigeki Ohtsu <[email protected]>
@MylesBorins MylesBorins mentioned this pull request Feb 11, 2016
Merged
MylesBorins pushed a commit to MylesBorins/node that referenced this pull request Feb 13, 2016
@indutny @MylesBorins
crypto: clear error stack in ECDH::Initialize
2f62644 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: nodejs#4686
PR-URL: nodejs#4689
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Shigeki Ohtsu <[email protected]>
MylesBorins pushed a commit to MylesBorins/node that referenced this pull request Feb 15, 2016
@indutny
crypto: clear error stack in ECDH::Initialize
9d4a226 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: nodejs#4686
PR-URL: nodejs#4689
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Shigeki Ohtsu <[email protected]>
scovetta pushed a commit to scovetta/node that referenced this pull request Apr 2, 2016
@indutny
crypto: clear error stack in ECDH::Initialize
5abb4ca 
Clean up OpenSSL error stack in `ECDH::Initialize`, some curves have
faulty implementations that are leaving dangling errors after
initializing the curve.

Fix: nodejs#4686
PR-URL: nodejs#4689
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Shigeki Ohtsu <[email protected]>
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@indutny @thefourtheye @shigeki @deian @mscdex @MylesBorins