Fix SHA, SHAKE, and KECCAK ASM flag passing

Flags for ASM implementations of SHA, SHAKE, and KECCAK were only passed to
the FIPS provider and not to the default or legacy provider. This

Fix SHA, SHAKE, and KECCAK ASM flag passing

Flags for ASM implementations of SHA, SHAKE, and KECCAK were only passed to
the FIPS provider and not to the default or legacy provider. This left some
potential for optimization. Pass the correct flags also to these providers.

Signed-off-by: Juergen Christ <jchrist@linux.ibm.com>

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Patrick Steuer <patrick.steuer@de.ibm.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18747)

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Rename x86-32 assembly files from .s to .S.

Rename x86-32 assembly files from .s to .S. While processing the .S file
gcc will use the pre-processor whic will evaluate macros and ifdef. T

Rename x86-32 assembly files from .s to .S.

Rename x86-32 assembly files from .s to .S. While processing the .S file
gcc will use the pre-processor whic will evaluate macros and ifdef. This
is turn will be used to enable the endbr32 opcode based on the __CET__
define.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18353)

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aarch64: support BTI and pointer authentication in assembly

This change adds optional support for
- Armv8.3-A Pointer Authentication (PAuth) and
- Armv8.5-A Branch Target Identificat

aarch64: support BTI and pointer authentication in assembly

This change adds optional support for
- Armv8.3-A Pointer Authentication (PAuth) and
- Armv8.5-A Branch Target Identification (BTI)
features to the perl scripts.

Both features can be enabled with additional compiler flags.
Unless any of these are enabled explicitly there is no code change at
all.

The extensions are briefly described below. Please read the appropriate
chapters of the Arm Architecture Reference Manual for the complete
specification.

Scope
-----

This change only affects generated assembly code.

Armv8.3-A Pointer Authentication
--------------------------------

Pointer Authentication extension supports the authentication of the
contents of registers before they are used for indirect branching
or load.

PAuth provides a probabilistic method to detect corruption of register
values. PAuth signing instructions generate a Pointer Authentication
Code (PAC) based on the value of a register, a seed and a key.
The generated PAC is inserted into the original value in the register.
A PAuth authentication instruction recomputes the PAC, and if it matches
the PAC in the register, restores its original value. In case of a
mismatch, an architecturally unmapped address is generated instead.

With PAuth, mitigation against ROP (Return-oriented Programming) attacks
can be implemented. This is achieved by signing the contents of the
link-register (LR) before it is pushed to stack. Once LR is popped,
it is authenticated. This way a stack corruption which overwrites the
LR on the stack is detectable.

The PAuth extension adds several new instructions, some of which are not
recognized by older hardware. To support a single codebase for both pre
Armv8.3-A targets and newer ones, only NOP-space instructions are added
by this patch. These instructions are treated as NOPs on hardware
which does not support Armv8.3-A. Furthermore, this patch only considers
cases where LR is saved to the stack and then restored before branching
to its content. There are cases in the code where LR is pushed to stack
but it is not used later. We do not address these cases as they are not
affected by PAuth.

There are two keys available to sign an instruction address: A and B.
PACIASP and PACIBSP only differ in the used keys: A and B, respectively.
The keys are typically managed by the operating system.

To enable generating code for PAuth compile with
-mbranch-protection=<mode>:

- standard or pac-ret: add PACIASP and AUTIASP, also enables BTI
(read below)
- pac-ret+b-key: add PACIBSP and AUTIBSP

Armv8.5-A Branch Target Identification
--------------------------------------

Branch Target Identification features some new instructions which
protect the execution of instructions on guarded pages which are not
intended branch targets.

If Armv8.5-A is supported by the hardware, execution of an instruction
changes the value of PSTATE.BTYPE field. If an indirect branch
lands on a guarded page the target instruction must be one of the
BTI <jc> flavors, or in case of a direct call or jump it can be any
other instruction. If the target instruction is not compatible with the
value of PSTATE.BTYPE a Branch Target Exception is generated.

In short, indirect jumps are compatible with BTI <j> and <jc> while
indirect calls are compatible with BTI <c> and <jc>. Please refer to the
specification for the details.

Armv8.3-A PACIASP and PACIBSP are implicit branch target
identification instructions which are equivalent with BTI c or BTI jc
depending on system register configuration.

BTI is used to mitigate JOP (Jump-oriented Programming) attacks by
limiting the set of instructions which can be jumped to.

BTI requires active linker support to mark the pages with BTI-enabled
code as guarded. For ELF64 files BTI compatibility is recorded in the
.note.gnu.property section. For a shared object or static binary it is
required that all linked units support BTI. This means that even a
single assembly file without the required note section turns-off BTI
for the whole binary or shared object.

The new BTI instructions are treated as NOPs on hardware which does
not support Armv8.5-A or on pages which are not guarded.

To insert this new and optional instruction compile with
-mbranch-protection=standard (also enables PAuth) or +bti.

When targeting a guarded page from a non-guarded page, weaker
compatibility restrictions apply to maintain compatibility between
legacy and new code. For detailed rules please refer to the Arm ARM.

Compiler support
----------------

Compiler support requires understanding '-mbranch-protection=<mode>'
and emitting the appropriate feature macros (__ARM_FEATURE_BTI_DEFAULT
and __ARM_FEATURE_PAC_DEFAULT). The current state is the following:

-------------------------------------------------------
| Compiler | -mbranch-protection | Feature macros |
+----------+---------------------+--------------------+
| clang | 9.0.0 | 11.0.0 |
+----------+---------------------+--------------------+
| gcc | 9 | expected in 10.1+ |
-------------------------------------------------------

Available Platforms
------------------

Arm Fast Model and QEMU support both extensions.

https://developer.arm.com/tools-and-software/simulation-models/fast-models
https://www.qemu.org/

Implementation Notes
--------------------

This change adds BTI landing pads even to assembly functions which are
likely to be directly called only. In these cases, landing pads might
be superfluous depending on what code the linker generates.
Code size and performance impact for these cases would be negligible.

Interaction with C code
-----------------------

Pointer Authentication is a per-frame protection while Branch Target
Identification can be turned on and off only for all code pages of a
whole shared object or static binary. Because of these properties if
C/C++ code is compiled without any of the above features but assembly
files support any of them unconditionally there is no incompatibility
between the two.

Useful Links
------------

To fully understand the details of both PAuth and BTI it is advised to
read the related chapters of the Arm Architecture Reference Manual
(Arm ARM):
https://developer.arm.com/documentation/ddi0487/latest/

Additional materials:

"Providing protection for complex software"
https://developer.arm.com/architectures/learn-the-architecture/providing-protection-for-complex-software

Arm Compiler Reference Guide Version 6.14: -mbranch-protection
https://developer.arm.com/documentation/101754/0614/armclang-Reference/armclang-Command-line-Options/-mbranch-protection?lang=en

Arm C Language Extensions (ACLE)
https://developer.arm.com/docs/101028/latest

Addional Notes
--------------

This patch is a copy of the work done by Tamas Petz in boringssl. It
contains the changes from the following commits:

aarch64: support BTI and pointer authentication in assembly
Change-Id: I4335f92e2ccc8e209c7d68a0a79f1acdf3aeb791
URL: https://boringssl-review.googlesource.com/c/boringssl/+/42084
aarch64: Improve conditional compilation
Change-Id: I14902a64e5f403c2b6a117bc9f5fb1a4f4611ebf
URL: https://boringssl-review.googlesource.com/c/boringssl/+/43524
aarch64: Fix name of gnu property note section
Change-Id: I6c432d1c852129e9c273f6469a8b60e3983671ec
URL: https://boringssl-review.googlesource.com/c/boringssl/+/44024

Change-Id: I2d95ebc5e4aeb5610d3b226f9754ee80cf74a9af

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/16674)

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ppccap.c: Split out algorithm-specific functions

Fixes #13336

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15828)

Drop libimplementations.a

libimplementations.a was a nice idea, but had a few flaws:

1. The idea to have common code in libimplementations.a and FIPS
sensitive helper funct

Drop libimplementations.a

libimplementations.a was a nice idea, but had a few flaws:

1. The idea to have common code in libimplementations.a and FIPS
sensitive helper functions in libfips.a / libnonfips.a didn't
catch on, and we saw full implementation ending up in them instead
and not appearing in libimplementations.a at all.

2. Because more or less ALL algorithm implementations were included
in libimplementations.a (the idea being that the appropriate
objects from it would be selected automatically by the linker when
building the shared libraries), it's very hard to find only the
implementation source that should go into the FIPS module, with
the result that the FIPS checksum mechanism include source files
that it shouldn't

To mitigate, we drop libimplementations.a, but retain the idea of
collecting implementations in static libraries. With that, we not
have:

libfips.a

Includes all implementations that should become part of the FIPS
provider.

liblegacy.a

Includes all implementations that should become part of the legacy
provider.

libdefault.a

Includes all implementations that should become part of the
default and base providers.

With this, libnonfips.a becomes irrelevant and is dropped.
libcommon.a is retained to include common provider code that can be
used uniformly by all providers.

Fixes #15157

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15171)

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Fix missing Assembler defines

Implementations are now spread across several libraries, so the assembler
related defines need to be applied to all affected libraries and modules.

Fix missing Assembler defines

Implementations are now spread across several libraries, so the assembler
related defines need to be applied to all affected libraries and modules.

AES_ASM define was missing from libimplementations.a which disabled AESNI
aarch64 changes were made by xkqian.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10180)

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Rework how our providers are built

We put almost everything in these internal static libraries:

libcommon Block building code that can be used by all

Rework how our providers are built

We put almost everything in these internal static libraries:

libcommon Block building code that can be used by all
our implementations, legacy and non-legacy
alike.
libimplementations All non-legacy algorithm implementations and
only them. All the code that ends up here is
agnostic to the definitions of FIPS_MODE.
liblegacy All legacy implementations.

libnonfips Support code for the algorithm implementations.
Built with FIPS_MODE undefined. Any code that
checks that FIPS_MODE isn't defined must end
up in this library.
libfips Support code for the algorithm implementations.
Built with FIPS_MODE defined. Any code that
checks that FIPS_MODE is defined must end up
in this library.

The FIPS provider module is built from providers/fips/*.c and linked
with libimplementations, libcommon and libfips.

The Legacy provider module is built from providers/legacy/*.c and
linked with liblegacy, libcommon and libcrypto.
If module building is disabled, the object files from liblegacy and
libcommon are added to libcrypto and the Legacy provider becomes a
built-in provider.

The Default provider module is built-in, so it ends up being linked
with libimplementations, libcommon and libnonfips. For libcrypto in
form of static library, the object files from those other libraries
are simply being added to libcrypto.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10088)

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build.info: For all assembler generators, remove all arguments

Since the arguments are now generated in the build file templates,
they should be removed from the build.info files.

build.info: For all assembler generators, remove all arguments

Since the arguments are now generated in the build file templates,
they should be removed from the build.info files.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9884)

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Move keccak1600_asm_src file information to build.info files

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9166)

Move sha1_asm_src file information to build.info files

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9166)

Use variables in build.info files where it's worth the while

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9144)

Move digests to providers

Move digest code into the relevant providers (fips, default, legacy).
The headers are temporarily moved to be internal, and will be moved
into providers aft

Move digests to providers

Move digest code into the relevant providers (fips, default, legacy).
The headers are temporarily moved to be internal, and will be moved
into providers after all external references are resolved. The deprecated
digest code can not be removed until EVP_PKEY (signing) is supported by
providers. EVP_MD data can also not yet be cleaned up for the same reasons.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8763)

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Create a FIPS provider and put SHA256 in it

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8537)

Build: Remove BEGINRAW / ENDRAW / OVERRIDE

It was an ugly hack to avoid certain problems that are no more.

Also added GENERATE lines for perlasm scripts that didn't have that
ex

Build: Remove BEGINRAW / ENDRAW / OVERRIDE

It was an ugly hack to avoid certain problems that are no more.

Also added GENERATE lines for perlasm scripts that didn't have that
explicitly.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8125)

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00-base-templates.conf: wire keccak1600-armv4 module.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6042)

00-base-templates.conf: wire keccak1600-ppc64 module.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6042)

00-base-templates.conf: wire keccak1600-s390x module.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6042)

00-base-templates.conf: wire keccak1600-armv8 module.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6042)

00-base-templates.conf: wire keccak1600-x86_64 module.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6042)

Configure: add $target{keccak1600_asm_src}.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6042)

Harmonize the make variables across all known platforms families

The make variables LIB_CFLAGS, DSO_CFLAGS and so on were used in
addition to CFLAGS and so on. This works without proble

Harmonize the make variables across all known platforms families

The make variables LIB_CFLAGS, DSO_CFLAGS and so on were used in
addition to CFLAGS and so on. This works without problem on Unix and
Windows, where options with different purposes (such as -D and -I) can
appear anywhere on the command line and get accumulated as they come.
This is not necessarely so on VMS. For example, macros must all be
collected and given through one /DEFINE, and the same goes for
inclusion directories (/INCLUDE).

So, to harmonize all platforms, we repurpose make variables starting
with LIB_, DSO_ and BIN_ to be all encompassing variables that
collects the corresponding values from CFLAGS, CPPFLAGS, DEFINES,
INCLUDES and so on together with possible config target values
specific for libraries DSOs and programs, and use them instead of the
general ones everywhere.

This will, for example, allow VMS to use the exact same generators for
generated files that go through cpp as all other platforms, something
that has been impossible to do safely before now.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5357)

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Processing GNU-style "make variables" - separate CPP flags from C flags

C preprocessor flags get separated from C flags, which has the
advantage that we don't get loads of macro definiti

Processing GNU-style "make variables" - separate CPP flags from C flags

C preprocessor flags get separated from C flags, which has the
advantage that we don't get loads of macro definitions and inclusion
directory specs when linking shared libraries, DSOs and programs.

This is a step to add support for "make variables" when configuring.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5177)

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s390x assembly pack: extend s390x capability vector.

Extend the s390x capability vector to store the longer facility list
available from z13 onwards. The bits indicating the vector exten

s390x assembly pack: extend s390x capability vector.

Extend the s390x capability vector to store the longer facility list
available from z13 onwards. The bits indicating the vector extensions
are set to zero, if the kernel does not enable the vector facility.

Also add capability bits returned by the crypto instructions' query
functions.

Signed-off-by: Patrick Steuer <patrick.steuer@de.ibm.com>

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4542)

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sha/keccak1600.c: build and make it work with strict warnings.

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://g

sha/keccak1600.c: build and make it work with strict warnings.

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3943)

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MIPS assembly pack: adapt it for MIPS[32|64]R6.

MIPS[32|64]R6 is binary and source incompatible with previous MIPS ISA
specifications. Fortunately it's still possible to resolve differen

MIPS assembly pack: adapt it for MIPS[32|64]R6.

MIPS[32|64]R6 is binary and source incompatible with previous MIPS ISA
specifications. Fortunately it's still possible to resolve differences
in source code with standard pre-processor and switching to trap-free
version of addition and subtraction instructions.

Reviewed-by: Richard Levitte <levitte@openssl.org>

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