I'm trying to build net-snmp-5.7.3 on a raspbery pi running Raspbian 9.4
stretch.
The default packages are OpenSSL 1.1.0f 25 May 2017, libssl-dev
1.1.0f-3+deb9u2.
I configure net-snmp like so,
./configure --with-defaults --with-ldflags=-Bstatic --disable-embedded-perl
--disable-perl-cc-checks --without-perl-modules
And get this config output..
> ---------------------------------------------------------
> Net-SNMP configuration summary:
> ---------------------------------------------------------
> SNMP Versions Supported: 1 2c 3
> Building for: linux
> Net-SNMP Version: 5.7.3
> Network transport support: Callback Unix Alias TCP UDP IPv4Base
> SocketBase TCPBase UDPIPv4Base UDPBase
> SNMPv3 Security Modules: usm
> Agent MIB code: default_modules => snmpv3mibs mibII ucd_snmp
> notification notification-log-mib target agent_mibs agentx disman/event
> disman/schedule utilities host
> MYSQL Trap Logging: unavailable
> Embedded Perl support: disabled
> SNMP Perl modules: disabled
> SNMP Python modules: disabled
> Crypto support from: crypto ///// internal ??
> Authentication support: MD5 SHA1
> Encryption support: DES AES
> Local DNSSEC validation: disabled
However make dies at this point.
/bin/bash ../libtool --mode=compile gcc -I../include -I.
> -I../snmplib -fno-strict-aliasing -g -O2 -Ulinux -Dlinux=linux -c -o
> keytools.lo keytools.c
> libtool: compile: gcc -I../include -I. -I../snmplib -fno-strict-aliasing
> -g -O2 -Ulinux -Dlinux=linux -c keytools.c -fPIC -DPIC -o .libs/keytools.o
> keytools.c: In function 'generate_Ku':
> keytools.c:155:25: error: dereferencing pointer to incomplete type
> 'EVP_MD_CTX {aka struct evp_md_ctx_st}'
> ctx = malloc(sizeof(*ctx));
> ^~~~
> keytools.c:265:9: warning: implicit declaration of function
> 'EVP_MD_CTX_cleanup' [-Wimplicit-function-declaration]
> EVP_MD_CTX_cleanup(ctx);
> ^~~~~~~~~~~~~~~~~~
> Makefile:98: recipe for target 'keytools.lo' failed
> make[1]: *** [keytools.lo] Error 1
> make[1]: Leaving directory '/root/net-snmp-5.7.3/snmplib'
> Makefile:656: recipe for target 'subdirs' failed
> make: *** [subdirs] Error 1
So the first question is what's wrong with the above ?
I have an Ubuntu box where I build net-snmp fine with crypo, it runs
OpenSSL 1.0.2g so I downgraded the Raspbery PI to 1.0.2o
apt-get remove openssl
> apt-get remove libssl-dev
> cd ~
> wget https://www.openssl.org/source/openssl-1.0.2o.tar.gz
> cd openssl...
> ./config --prefix=/usr/local --openssldir=/usr/local/openssl shared
> make
> make install
> ldconfig
> ldd $(which openssl)
> linux-vdso.so.1 (0x7ee91000)
> /usr/lib/arm-linux-gnueabihf/libarmmem.so (0x76f09000)
> libssl.so.1.0.0 => /usr/local/lib/libssl.so.1.0.0 (0x76ea4000)
> libcrypto.so.1.0.0 => /usr/local/lib/libcrypto.so.1.0.0
> (0x76d17000)
> libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0x76d04000)
> libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0x76bc5000)
> /lib/ld-linux-armhf.so.3 (0x76f1f000)
>
Everything seems fine but now the configuration summary shows only "Crypto
support from: Internal"
I looked at the configure script to see how it tests for OpenSSL support
and replicated that
#include <openssl/ssl.h>
> char EVP_md5 ();
> int main(int argc, char *argv[]) {
> return EVP_md5 ();
> ;
> return 0;
> }
When I build that I get the following error showing that the EVP_md5 is
accessible and the crypto library is installed.
# gcc t.c -lcrypto
> t.c:3:6: error: conflicting types for ‘EVP_md5’
> char EVP_md5 ();
> ^~~~~~~
> In file included from /usr/local/include/openssl/x509.h:73:0,
> from /usr/local/include/openssl/ssl.h:156,
> from t.c:1:
> /usr/local/include/openssl/evp.h:716:15: note: previous declaration of
> ‘EVP_md5’ was here
> const EVP_MD *EVP_md5(void);
> ^~~~~~~
I'm not sure if that's the exact test that the configure script is doing
but it's just not detecting
I hacked the configure script to force CRYPTO="crypto" but then compilation
fails elsewhere so I assume I actually have installed OpenSSL incorrectly.
But ether-way I would prefer to fix the first problem above and link
to libssl-dev
1.1.0f
Thanks
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Net-snmp-coders mailing list
Net-snmp-coders@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
