[root@251 /]# uname -ormiK
FreeBSD 11.1-RELEASE-p4 amd64 GENERIC 1101001

[root@251 /]# /opt/cprocsp/bin/amd64/ocsputil -V
ocsputil 2.0
[ReturnCode: 0x0]

[root@251 /var/tmp]# /opt/cprocsp/bin/amd64/ocsputil respinfo ocsp.test
Status: 0 (successful)
Signature algorithm: 1.2.643.2.2.3, ALG_ID: 0x0
HasNonce: 1
ProducedAt: 05.03.2018 13:16:21
Extensions: none
terminate called after throwing an instance of 'std::ios_base::failure'
  what():  basic_filebuf::_M_convert_to_external conversion error
Abort trap

Shared object "libocspcli.so.2" not found, required by "ocsputil"
....
Shared object "libtspcli.so.2" not found, required by "tsputil"
Shared object "libtsp.so.2" not found, required by "tsputil"

может стоит добавить в инсталятор ?:
ln -s /opt/cprocsp/lib/amd64/libocspcli.so.2  /usr/lib/libocspcli.so.2 
ln -s /opt/cprocsp/lib/amd64/libcapi10.so.4  /usr/lib/libcapi10.so.4 
ln -s /opt/cprocsp/lib/amd64/libcapi20.so.4  /usr/lib/libcapi20.so.4 
ln -s /opt/cprocsp/lib/amd64/librdrsup.so.4  /usr/lib/librdrsup.so.4 
ln -s /opt/cprocsp/lib/amd64/libocsp.so.2  /usr/lib/libocsp.so.2 
ln -s /opt/cprocsp/lib/amd64/libcpalloc.so.0  /usr/lib/libcpalloc.so.0 

ln -s /opt/cprocsp/lib/amd64/libtspcli.so.2  /usr/lib/libtspcli.so.2
ln -s /opt/cprocsp/lib/amd64/libtsp.so.2  /usr/lib/libtsp.so.2 

terminate called after throwing an instance of 'std::ios_base::failure'
  what():  basic_filebuf::_M_convert_to_external conversion error
Abort trap