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Build Layout

---

static libraries for wanboot are done for 32 and 64 bits. So, in total, OpenSSL

is built seven times. OpenSSL for wanboot is only built on sparc.

See also comments in all the Makefiles for more information.

OpenSSL Version

The non-fips Build.

---

The non-fips build is the 'default' build of OpenSSL and includes the regular

binaries, libraries, man pages, and header files.

The fips Build

---

The admin may choose to activate 'openssl-fips' implementation using 'pkg mediator'.

The wanboot Build

----

There are some significant differences when building OpenSSL for wanboot.

Some additional Configuration options are needed:

-DNO_CHMOD		chmod not available in stand-alone environment

-DBOOT			guard for wanboot specific patches

-DOPENSSL_NO_DTLS1	to avoid dtls1_min_mtu() - DTLS not used anyway

List of object files for wanboot-openssl.o

----

At this moment, object files for wanboot-openssl.o need to be listed explicitly.

This is cumbersome and relatively tedious with respect to upgrading to higher

version of openssl. 

In future, it would be nice, if this could be performed automatically by the

linker. The required interface for wanboot is already defined in a mapfile and

linker option '-zdiscard-unused=sections,files' is already used to discard

unused code. 

But sadly, at this moment when the linker is given all the object files, it

correctly discards some unused files, but references to undefined symbols from

the discarded files don't get discarded along. Later, these undefined references

cause wanboot linking failure. 

In order to determine which openssl object files are required for wanboot,

first build static standalone openssl bits in Userland. As a site effect,

static libraries libssl.a and libcrypto.a are created in build/sparcv9-wanboot.

Next, collect some information from linking wanboot static libraries in ON.

This can be done by the following hack.

    $ cd $ON/usr/src/psm/stand/boot/sparcv9/sun4

    $ touch wanboot.o

    $ LD_OPTIONS="-Dfiles,symbols,output=ld.dbg \

        WAN_OPENSSL=" -lwanboot -lssl -lcrypto" dmake all

The following sort of information ends up in ld.dbg (note that the debugging

output from the link-editor is not considered a 'stable interface' and may

change in the future):

    debug:

    debug: symbol[1]=sparcv9cap.c

    ....

Now run the following script in Userland:

    #!/bin/bash

    # set to workspace paths:

    USERLAND=/builds/tkuthan/ul-wanboot-rebuilt

    ON=/builds/tkuthan/on11u1-wanboot-rti

    LD_DBG=$ON/usr/src/psm/stand/boot/sparcv9/sun4/ld.dbg

    for i in `find $BUILD/crypto $BUILD/ssl -name '*.o'`

    do

            f=`basename $i`

            if grep -q "^debug: file.*\<$f\>" $LD_DBG

            then

                    echo $i | sed "s#$BUILD/##"

            fi

    done

to get the list of required object files.

Additionally, you can format the list for including to Makefile by:

    sort | tr '\n' ' ' | fold -s -w74 | sed -e 's/^/    /' -e 's/$/\\/'

Linking with wanboot

----

When linking with wanboot please pay attention to following pitfalls.

Correct openssl header files need to be included. This is done in

$ON/usr/src/stand/lib/wanboot/Makefile

Make sure CPPFLAGS point to the right directories.

EXTREME CAUTION needs to be employed, if WANBOOT GREW IN SIZE because of the

changes!

Wanboot is a statically linked standalone binary and it is loaded on a fixed

address before execution. This address is defined in 

$ON/usr/src/psm/stand/boot/sparc/common/mapfile:

	LOAD_SEGMENT text {

		FLAGS = READ EXECUTE;

		VADDR = 0x130000;

		ASSIGN_SECTION {

			TYPE = PROGBITS;

			FLAGS = ALLOC !WRITE;

		};

	};

This address (VADDR) NEEDS TO BE GREATER THEN 

    size of wanboot binary + 0x4000

The reason for this is in how wanboot is loaded by OpenBoot Prom:

1) user initiates boot from network - "boot net"

2) obp loads wanboot binary at address 0x4000

3) obp parses ELF header, reads virtual address where to load wanboot to

4) obp mem-copies .text section to this address

5) obp copies .data section behind .text

6) obp starts executing wanboot at entry address

If the given address is too small, obp overwrites part of .data with

instructions from .text in step 4. resulting in .data being corrupted.

Initialized variables get bogus values and failure is inevitable.

This is very hard to troubleshoot.

Testing wanboot with new openssl

----

With every upgrade of OpenSSL, it is necessary to make sure wanboot builds and

works well with the new bits (post lullaby).

Provided you have a freshly built ON workspace, you can link wanboot with new

OpenSSL bits as follows:

    # copy wanboot-openssl.o to ON build machine

    cp wanboot-openssl.o /var/tmp/

    # prepare to rebuild wanboot

    cd $ON

    cd usr/src/psm/stand/boot/sparcv9/sun4

    # hack to force a rebuild

    touch $ON/build.sparc/usr/src/psm/stand/boot/sparcv9/sun4/wanboot.o

    # modify Makefile and assign the WAN_OPENSSL macro to your binary

    # something like

    WAN_OPENSSL    = /var/tmp/wanboot-openssl.o

    # build a wanboot binary

    build -i dmake all

Wanboot should build without warning.

If there is something like this in the output:

    Undefined                       first referenced

     symbol                             in file

    CRYPTO_ccm128_setiv                 /var/tmp/wanboot-openssl.o

    SSL_get_srtp_profiles               /var/tmp/wanboot-openssl.o

    ssl_parse_clienthello_use_srtp_ext  /var/tmp/wanboot-openssl.o

    CRYPTO_gcm128_setiv                 /var/tmp/wanboot-openssl.o

    ...

    cmac_pkey_meth                      /var/tmp/wanboot-openssl.o

    ld: fatal: symbol referencing errors. No output written to wanboot

    *** Error code 1

    dmake: Fatal error: Command failed for target `wanboot'

some additional work has to be done in OpenSSL to either satisfy the function 

references listed in the linker error message, or to remove the calls to these

functions.

Finally, resulting wanboot binary shall be deployed on some install server and

wanbooting from this server shall be tested.

===============

Common Patches

===============

Common patch files are located in the components/openssl/common/patches dir,

and they are copied to both FIPS and non-FIPS 'patches' dir as soon as the

Makefile is parsed.  The Common patch filename has prefix '0',

=========================

Non-FIPS specific Patches

=========================

Non-FIPS specific patch files are located in the

The Non-FIPS specific patch filename has prefix '1',

=========================

FIPS specific Patches

=========================

FIPS specific patch files are located in the

The FIPS specific patch filename has prefix '2',