[strongSwan] No MD4 hasher available

Andreas Steffen andreas.steffen at strongswan.org
Tue Aug 23 12:27:40 CEST 2011

Hello Matt,

your configuration steps are all correct, so it's difficult
to say what went wrong. Could you change into the


directory and execute


followed by

  sudo make install

and check if 1) any compilation errors occur 2) if
libstrongswan-md4.so gets installed in the



Best regards


On 23.08.2011 11:50, Matthew Cini Sarreo wrote:
> Hello all,
> I am attempting to use strongSwan 4.5.0 as an IKEv2 client which uses
> EAP-MSCHAPv2 for authentication. When building from sources I have used
> the following command:
> ./configure --enable-md4 --enable-eap-mschapv2
> However, during the IKEv2 negotiation I get the following error:
> EAP-MS-CHAPv2 failed, no MD4 hasher available.
> For testing, strongswan.conf was changed to contain the following line:
> load = aes des sha1 sha2 md4 md5 pem pkcs1 gmp random x509 revocation
> hmac xcbc stroke kernel-netlink fips-prf eap-mschapv2 updown
> Executing charon resulted in the following error:
> root at XUbuntu9:/usr/local/libexec/ipsec# ./charon
> 00[DMN] Starting IKEv2 charon daemon (strongSwan 4.5.0)
> 00[LIB] plugin 'md4' failed to load:
> /usr/libexec/ipsec/plugins/libstrongswan-md4.so: cannot open shared
> object file: No such file or directory
> What am I doing wrong?
> Thanks & Regards,
> Matt

Andreas Steffen                         andreas.steffen at strongswan.org
strongSwan - the Linux VPN Solution!                www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)

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