[tor-bugs] #5170 [Tor Client]: crypto_pk_get_digest (et al.?) use i2d_RSAPublicKey obsoletely

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#5170: crypto_pk_get_digest (et al.?) use i2d_RSAPublicKey obsoletely
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 Reporter:  rransom     |          Owner:     
     Type:  defect      |         Status:  new
 Priority:  trivial     |      Milestone:     
Component:  Tor Client  |        Version:     
 Keywords:  easy        |         Parent:     
   Points:              |   Actualpoints:     
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 `i2d_RSAPublicKey` now supports (in OpenSSL 0.9.7 or later, so in all
 OpenSSL versions we support) allocating its own output buffer (using
 `OPENSSL_malloc`).  Is this feature worth using in `crypto_pk_get_digest`
 (and some other functions which call `i2d_RSAPublicKey` twice to allocate
 a ''temporary'' buffer)?

 (See the `i2d_X509(3ssl)` man page.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5170>
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