Date: Thu, 19 Jul 2012 17:36:14 +0200 From: Frank Dittrich <frank_dittrich@...mail.com> To: john-dev@...ts.openwall.com Subject: Re: RFC: add more information to --list=build-info output? On 07/19/2012 04:59 PM, jfoug wrote: >>> Add: >>> OpenSSL version, and bit size (if that can be found). >> >> Do we link OpenSSL dynamically? In that case, I'd consider that run time >> info instead of build-info. >> This would justify a --list=run-time-info. >> >> I'll have to check what happens if I print OPENSSL_VERSION_NUMBER, and >> copy the binary that has been built on one machine to another one. > > The OPENSSL_VERSION_NUMBER is a compile time thing. There likely is some > way to get the version of the runtime instance also. OK, I've found something man OPENSSL_VERSION_NUMBER works :) OPENSSL_VERSION_NUMBER(3) OpenSSL OPENSSL_VERSION_NUMBER(3) NAME OPENSSL_VERSION_NUMBER, SSLeay, SSLeay_version - get OpenSSL version number SYNOPSIS #include <openssl/opensslv.h> #define OPENSSL_VERSION_NUMBER 0xnnnnnnnnnL #include <openssl/crypto.h> long SSLeay(void); const char *SSLeay_version(int t); ... So, OPENSSL_VERSION_NUMBER contains the compile time string of the binary, but SSLeay() should return the library version number. So, we could print the OPENSSL_VERSION_NUMBER, and print a warning if OpenSSL is missing, or if the version number differs (or would we warn only if the library version is smaller than the compile time version? > This WOULD be a good check, if they do not match, list this as a warning. > Even though this would be a run-time check, I think it would be beneficial > to have the run-time version listed on the -list=build-info, IF that version > did not match what this image was built with. Sounds reasonable. Nevertheless, a --list=run-time-info can be useful. Various library versions, CPU info, OS and version, available memory, locale setting (LANG=en_US.UTF-8 / LC_ALL=C) ... Frank
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