NOTES FOR THE HPE NONSTOP PLATFORM
==============================

Requirement details
-------------------

In addition to the requirements and instructions listed
in [INSTALL.md](INSTALL.md), the following are required as well:

 * The TNS/X platform supports hardware randomization.
   Specify the `--with-rand-seed=rdcpu` option to the `./Configure` script.
   This is recommended but not required. `egd` is supported at 3.0 but cannot
   be used if FIPS is selected.
 * The TNS/E platform does not support hardware randomization, so
   specify the `--with-rand-seed=egd` option to the `./Configure` script.

About c99 compiler
------------------

The c99 compiler is required for building OpenSSL from source. While c11
may work, it has not been broadly tested. c99 is the only compiler
prerequisite needed to build OpenSSL 3.0 on this platform. You should also
have the FLOSS package installed on your system. The ITUGLIB FLOSS package
is the only FLOSS variant that has been broadly tested.

Threading Models
----------------

OpenSSL can be built using unthreaded, POSIX User Threads (PUT), or Standard
POSIX Threads (SPT). Select the following build configuration for each on
the TNS/X (L-Series) platform:

 * `nonstop-nsx` or default will select an unthreaded build.
 * `nonstop-nsx_put` selects the PUT build.
 * `nonstop-nsx_64_put` selects the 64 bit file length PUT build.
 * `nonstop-nsx_spt_floss` selects the SPT build with FLOSS. FLOSS is
   required for SPT builds because of a known hang when using SPT on its own.

### TNS/E Considerations

The TNS/E platform is build using the same set of builds specifying `nse`
instead of `nsx` in the set above.

You cannot build for TNS/E for FIPS, so you must specify the `no-fips`
option to `./Configure`

About Prefix and OpenSSLDir
---------------------------

Because there are many potential builds that must co-exist on any given
NonStop node, managing the location of your build distribution is crucial.
Keep each destination separate and distinct. Mixing any mode described in
this document can cause application instability. The recommended approach
is to specify the OpenSSL version and threading model in your configuration
options, and keeping your memory and float options consistent, for example:

 * For 1.1 `--prefix=/usr/local-ssl1.1 --openssldir=/usr/local-ssl1.1/ssl`
 * For 1.1 PUT `--prefix=/usr/local-ssl1.1_put --openssldir=/usr/local-ssl1.1_put/ssl`
 * For 3.0 `--prefix=/usr/local-ssl3.0 --openssldir=/usr/local-ssl3.0/ssl`
 * For 3.0 PUT `--prefix=/usr/local-ssl3.0_put --openssldir=/usr/local-ssl3.0_put/ssl`

Use the `_RLD_LIB_PATH` environment variable in OSS to select the appropriate
directory containing `libcrypto.so` and `libssl.so`. In GUARDIAN, use the
`=_RLD_LIB_PATH` search define to locate the GUARDIAN subvolume where OpenSSL
is installed.

Float Considerations
--------------------

OpenSSL is built using IEEE Float mode by default. If you need a different
IEEE mode, create a new configuration specifying `tfloat-x86-64` (for Tandem
Float) or `nfloat-x86-64` (for Neutral Float).

Memory Models
-------------

The current OpenSSL default memory model uses the default platform address
model. If you need a different address model, you must specify the appropriate
c99 options for compile (`CFLAGS`) and linkers (`LDFLAGS`).

Cross Compiling with NSDEE
--------------------------

**Note:** None of these builds have been tested by the platform maintainer and are
supplied for historical value. Please submit a Pull Request to OpenSSL should
these need to be adjusted.

If you are attempting to build OpenSSL with NSDEE, you will need to specify
the following variables. The following set of compiler defines are required:

    # COMP_ROOT must be a full path for the build system (e.g. windows)
    COMP_ROOT=$(cygpath -w /path/to/comp_root)
    # CC must be executable by your shell
    CC=/path/to/c99

### Optional Build Variables

    DBGFLAG="--debug"
    CIPHENABLES="enable-ssl3 enable-ssl3-method enable-weak-ssl-ciphers enable-rc4"

### Internal Known TNS/X to TNS/E Cross Compile Variables

The following definition is required if you are building on TNS/X for TNS/E
and have access to a TNS/E machine on your EXPAND network - with an example
node named `\CS3`:

    SYSTEMLIBS="-L/E/cs3/usr/local/lib"

Version Procedure (VPROC) Considerations
----------------------------------------

If you require a VPROC entry for platform version identification, use the
following variables:

### For Itanium

    OPENSSL_VPROC_PREFIX=T0085H06

### For x86

    OPENSSL_VPROC_PREFIX=T0085L01

### Common Definition

    export OPENSSL_VPROC=${OPENSSL_VPROC_PREFIX}_$(
        . VERSION.dat
        if [ -n "$PRE_RELEASE_TAG" ]; then
            PRE_RELEASE_TAG="-$PRE_RELEASE_TAG"
        fi
        echo "$MAJOR.$MINOR.$PATCH$PRE_RELEASE_TAG$BUILD_METADATA" |\
            sed -e 's/[-.+]/_/g'
        )

Example Configure Targets
-------------------------

For OSS targets, the main DLL names will be `libssl.so` and `libcrypto.so`.
For GUARDIAN targets, DLL names will be `ssl` and `crypto`. The following
assumes that your PWD is set according to your installation standards.

    ./Configure nonstop-nsx           --prefix=${PWD} \
        --openssldir=${PWD}/ssl no-threads \
        --with-rand-seed=rdcpu ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nsx_g         --prefix=${PWD} \
        --openssldir=${PWD}/ssl no-threads \
        --with-rand-seed=rdcpu ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nsx_put       --prefix=${PWD} \
        --openssldir=${PWD}/ssl threads "-D_REENTRANT" \
        --with-rand-seed=rdcpu ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nsx_spt_floss --prefix=${PWD} \
        --openssldir=${PWD}/ssl threads "-D_REENTRANT" \
        --with-rand-seed=rdcpu ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nsx_64        --prefix=${PWD} \
        --openssldir=${PWD}/ssl no-threads \
        --with-rand-seed=rdcpu ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nsx_64_put    --prefix=${PWD} \
        --openssldir=${PWD}/ssl threads "-D_REENTRANT" \
        --with-rand-seed=rdcpu ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nsx_g_tandem  --prefix=${PWD} \
        --openssldir=${PWD}/ssl no-threads \
        --with-rand-seed=rdcpu ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}

    ./Configure nonstop-nse           --prefix=${PWD} \
        --openssldir=${PWD}/ssl no-threads \
        --with-rand-seed=egd ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nse_g         --prefix=${PWD} \
        --openssldir=${PWD}/ssl no-threads \
        --with-rand-seed=egd ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nse_put       --prefix=${PWD} \
        --openssldir=${PWD}/ssl threads "-D_REENTRANT" \
        --with-rand-seed=egd ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nse_spt_floss --prefix=${PWD} \
        --openssldir=${PWD}/ssl threads "-D_REENTRANT" \
        --with-rand-seed=egd ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nse_64        --prefix=${PWD} \
        --openssldir=${PWD}/ssl no-threads \
        --with-rand-seed=egd ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nse_64_put    --prefix=${PWD} \
        --openssldir=${PWD}/ssl threads "-D_REENTRANT"
        --with-rand-seed=egd ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}
    ./Configure nonstop-nse_g_tandem  --prefix=${PWD} \
        --openssldir=${PWD}/ssl no-threads \
        --with-rand-seed=egd ${CIPHENABLES} ${DBGFLAG} ${SYSTEMLIBS}