libcrypto++ shared object missing symbols (library archive OK)

[Jeffrey Walton]

Package: libcrypto++8
Version: 5.6.0-5

Please forgive the "dotting of i's and crossing of t's". Debian and Ubuntu are my platforms of choice, so I spend a little bit more time on them.

It appears the shared object version of the Crypto++ package is missing symbols in libcrypto++.so (but not libcrypto++.a).
g_nullNameValuPairs was implicated in a crash [1]. However, the symbol is not present in some Ubuntu libraries, which I believe can be sourced to Debian. The issue was reported to Debian, and this report will be annotated once Debian responds with a tracking number.

For completeness, the symbol g_nullNameValuePairs has storage allocated in cryptlib.cpp, line 40. See http://www.cryptopp.com/docs/ref/cryptlib_8cpp_source.html.

The missing symbol *appears* to be causing an [unrelated] crash when using dlopen/dlsym in a stress test for the issue in [1]. A bug report for the dlopen/dlsym crash will be reported when a minimum proof of concept is written.

root@bruno:/# nm /usr/lib/libcryptopp.a | grep g_nullNameValuePairs
                 U _ZN8CryptoPP20g_nullNameValuePairsE
0000000000000010 B _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
root@bruno:/# nm /usr/lib/libcryptopp.so | grep g_nullNameValuePairs
nm: /usr/lib/libcryptopp.so: no symbols
root@bruno:/# nm /usr/lib64/libcryptopp.a | grep g_nullNameValuePairs
                 U _ZN8CryptoPP20g_nullNameValuePairsE
0000000000000010 B _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
                 U _ZN8CryptoPP20g_nullNameValuePairsE
root@bruno:/# nm /usr/lib64/libcryptopp.so | grep g_nullNameValuePairs
nm: /usr/lib64/libcryptopp.so: no symbols

Jeffrey Walton

[1] Errors with multiple loading cryptopp as shared lib on Linux, http://groups.google.com/group/cryptopp-users/browse_thread/thread/68fbc22e8c6e2f48

root@bruno:/# uname -a
Linux bruno 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64 GNU/Linux

root@bruno:/# apt-get install libcrypto++8 libcrypto++8-dbg libcrypto++-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  libcrypto++-dev libcrypto++8 libcrypto++8-dbg
...

root@bruno:/# whereis libcrypto++
libcrypto++: /usr/lib/libcrypto++.so /usr/lib/libcrypto++.a /usr/lib64/libcrypto++.so /usr/lib64/libcrypto++.a

[Jeffrey Walton (noloader)]

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=600128

[Jeffrey Walton (noloader)]

Please close this erroneous report.

root@bruno:/# nm -D /usr/lib/libcrypto++.so | grep g_nullNameValuePairs
00000000006b7cc0 B _ZN8CryptoPP20g_nullNameValuePairsE
root@bruno:/# nm -D /usr/lib64/libcrypto++.so | grep g_nullNameValuePairs
00000000006b7cc0 B _ZN8CryptoPP20g_nullNameValuePairsE

Many thanks to Nathan Phillip Brink on the Crypto++ mailing list.

JW