[tor-bugs] #27344 [Core Tor/Tor]: Debian OpenSSL 1.1.1~~pre6-1 requires 2048 bit RSA keys (was: TLS error while constructing a TLS context: dh key too small (in SSL routines:ssl3_ctx_ctrl:---))

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#27344: Debian OpenSSL 1.1.1~~pre6-1 requires 2048 bit RSA keys
-------------------------------------------------+-------------------------
 Reporter:  weasel                               |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.4.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  unspecified
 Severity:  Normal                               |     Resolution:
 Keywords:  openssl, debian, 034-must,           |  Actual Points:
  035-must, 029-backport, 032-backport,          |
  033-backport, 034-backport                     |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by teor):

 * keywords:   =>
     openssl, debian, 034-must, 035-must, 029-backport, 032-backport,
     033-backport, 034-backport
 * version:  Tor: 0.3.3.9 => Tor: unspecified
 * milestone:   => Tor: 0.3.4.x-final


Comment:

 This appears to be a bug on Tor 0.0.9pre5, but we only backport to
 supported release series.

 The following Tor subsystems use RSA 1024 bit keys:
 * relay and bridge legacy onion keys
 * authorities and bridge authorities parsing those keys
 * v2 onion services

 Some helpful people on #tor-dev suggest that we set the security level at
 runtime:
 https://www.openssl.org/docs/man1.1.1/man3/SSL_CTX_set_security_level.html

 We should fix this in 0.3.4, then backport to 0.2.9 and later.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27344#comment:3>
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