Re: Problem with Crypto - OpenSSL 1.1.0f - Linux 9.4 (stretch)

Thanks, you solved my problem but with the path as /usr/local where I had
installed openssl to.


I'll probably have to stick with  5.7.3 for production for now (on Pi
Compute Module) but seeing as you did me a favour I thought I would give
5.8 pre3 a spin for you. Perhaps I'm the first as I just got the release
notice this morning.

All worked fine no issues to report, basic tests of my AgentX daemon (still
compiled against 5.7.3) works.


./configure --with-defaults --with-ldflags=-Bstatic --disable-embedded-perl
> --disable-perl-cc-checks --without-perl-modules --with-openssl=/usr/local



---------------------------------------------------------
>             Net-SNMP configuration summary:
> ---------------------------------------------------------
>   SNMP Versions Supported:    1 2c 3
>   Building for:               linux
>   Net-SNMP Version:           5.8.pre3
>   Network transport support:  Callback Unix Alias TCP UDP TCPIPv6 UDPIPv6
> IPv4Base SocketBase TCPBase UDPIPv4Base UDPBase IPv6Base
>   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
>   Authentication support:     MD5 SHA1 SHA512 SHA384 SHA256 SHA192
>   Encryption support:         DES AES
>   Local DNSSEC validation:    disabled
> ---------------------------------------------------------



root@raspberrypi:~# snmpd --version
> NET-SNMP version:  5.8.pre3
> Web:               http://www.net-snmp.org/
> Email:             [email protected]
> root@raspberrypi:~# Hello from Pi-land





On Fri, May 4, 2018 at 1:17 AM, Keith Mendoza <[email protected]> wrote:

> Dave,
> Try adding --with-openssl=/usr in the call to configure on your raspberry
> pi. If you're brave you can also try 5.8pre3  from
> https://sourceforge.net/projects/net-snmp/files/net-snmp/5.8-pre-releases/
>
> --
> Thanks,
> Keith (pantherse)
>
> On Wed, May 2, 2018, at 7:04 PM, Dave C wrote:
> > 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
> > ------------------------------------------------------------
> ------------------
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>
> ------------------------------------------------------------
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