[tor-bugs] #25381 [Core Tor/Tor]: Add crypto_rand_double_sign() in C and Rust

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#25381: Add crypto_rand_double_sign() in C and Rust
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 Reporter:  teor                  |          Owner:  teor
     Type:  enhancement           |         Status:  needs_review
 Priority:  Medium                |      Milestone:  Tor: 0.3.4.x-final
Component:  Core Tor/Tor          |        Version:
 Severity:  Normal                |     Resolution:
 Keywords:  tor-relay, privcount  |  Actual Points:  1
Parent ID:  #23061                |         Points:  2
 Reviewer:                        |        Sponsor:  SponsorQ
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Changes (by teor):

 * status:  needs_revision => needs_review
 * actualpoints:   => 1


Comment:

 Please see my draft branch rust-rand-f64-v4 on
 https://github.com/teor2345/tor.git

 It's not ready to be merged yet, but it has basic structure, tests, and
 some functionality.

 Here are the remaining tasks:
 * write some floating-point error documentation
 * clean up the module imports: the imports I'm doing seem rather clunky
 * tidy up some of the comments and missing references

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25381#comment:4>
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