On Oct 10 2012, Evan Hunt wrote:

BIND 9.7.7, 9.8.4 and 9.9.2 have "improved" OpenSSL error logging.
Unfortunately, our logs are now filling up with "RSA_verify failed"
messages.

Yeah, oops, we made that one too noisy.  You're not the first one
who's noticed. :/

Also, without any indication of what was trying to be verified, rather
useless.

With 9.8.4 we also see lots of "RSA_public_decrypt failed" as well, e.g.

Oct 10 20:15:24  general: warning: RSA_verify failed
Oct 10 20:15:27  last message repeated 6 times
Oct 10 20:16:57  general: warning: RSA_verify failed
Oct 10 20:17:50  last message repeated 13 times
Oct 10 20:18:04  general: warning: RSA_public_decrypt failed
Oct 10 20:18:05  last message repeated 17 times
Oct 10 20:18:09  general: warning: RSA_verify failed
Oct 10 20:23:16  last message repeated 39 times
Oct 10 20:23:38  general: warning: RSA_verify failed
Oct 10 20:25:57  last message repeated 13 times
Oct 10 20:26:12  general: warning: RSA_public_decrypt failed
Oct 10 20:26:12  last message repeated 1 time

etc.

How does one go about tracking down the source of these failures and
correcting them? (We are running OpenSSL 1.0.1c.)

In BIND9, in lib/dns/opensslrsa_link.c, change this:

               return (dst__openssl_toresult2("RSA_verify",
                                              DST_R_VERIFYFAILURE));

to this:

               return (dst__openssl_toresult(DST_R_VERIFYFAILURE));

Presumably we need to change this code

                               return (dst__openssl_toresult2(
                                               "RSA_public_decrypt",
                                               DST_R_VERIFYFAILURE));

similarly?

--
Chris Thompson
Email: c...@cam.ac.uk
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