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* src/misc.c (_gcry_strtokenize): New.
--
The code has been taken from GnuPG and re-licensed to LPGLv2+ by me as
its original author. Minor changes for use in Libgcrypt.
Signed-off-by: Werner Koch <wk@gnupg.org>
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* src/visibility.h: Remove remaining define/undef hacks for symbol
visibility. Add macros to detect the use of the public functions.
Change all affected functions by replacing them by the x-macros.
* src/g10lib.h: Add internal prototypes.
(xtrymalloc, xtrycalloc, xtrymalloc_secure, xtrycalloc_secure)
(xtryrealloc, xtrystrdup, xmalloc, xcalloc, xmalloc_secure)
(xcalloc_secure, xrealloc, xstrdup, xfree): New macros.
--
The use of xmalloc/xtrymalloc/xfree is a more common pattern than the
gcry_free etc. functions. Those functions behave like those defined
by C and thus for better readability we use these macros and not
the underscore prefixed functions.
Signed-off-by: Werner Koch <wk@gnupg.org>
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* src/visibility.h: Remove almost all define/undef hacks for symbol
visibility. Add macros to detect the use of the public functions.
Change all affected functions by prefixing them explicitly with an
underscore and change all internal callers to call the underscore
prefixed versions. Provide convenience macros from sexp and mpi
functions.
* src/visibility.c: Change all functions to use only gpg_err_code_t
and translate to gpg_error_t only in visibility.c.
--
The use of the macro magic made if hard to follow the function calls
in the source. It was not easy to see if an internal or external
function (as defined by visibility.c) was called. The change is quite
large but hopefully makes Libgcrypt easier to maintain. Some
function have not yet been fixed; this will be done soon.
Because Libgcrypt does no make use of any other libgpg-error using
libraries it is useless to always translate between gpg_error_t and
gpg_err_code_t (i.e with and w/o error source identifier). This
translation has no mostly be moved to the function wrappers in
visibility.c. An additional advantage of using gpg_err_code_t is that
comparison can be done without using gpg_err_code().
I am sorry for that large patch, but a series of patches would
actually be more work to audit.
Signed-off-by: Werner Koch <wk@gnupg.org>
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* configure.ac: New check, HAVE_GCC_ASM_VOLATILE_MEMORY.
* src/g10lib.h (_gcry_burn_stack): Rename to __gcry_burn_stack.
(__gcry_burn_stack_dummy): New.
(_gcry_burn_stack): New macro.
* src/misc.c (_gcry_burn_stack): Rename to __gcry_burn_stack.
(__gcry_burn_stack_dummy): New.
--
Tail call optimization can turn _gcry_burn_stack call in to tail jump. When
this happens, stack pointer is restored to initial state of current function.
This causes problem for _gcry_burn_stack because its callers do not count in
current function stack depth.
One solution is to prevent gcry_burn_stack being tail optimized by inserting
dummy function call behind it. Another would be to add memory barrier 'asm
volatile("":::"memory")' behind every _gcry_burn_stack call. This however
requires GCC asm support from compiler.
Patch adds detection for memory barrier support and when available uses
memory barrier to prevent when tail call optimization. If not available
dummy function call is used instead.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
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* mpi/ec-ed25519.c: New but empty file.
* mpi/ec-internal.h: New.
* mpi/ec.c: Include ec-internal.h.
(ec_mod): New.
(ec_addm): Use ec_mod.
(ec_mulm): Remove commented code. Use ec_mod.
(ec_subm): Call simple sub.
(ec_pow2): Use ec_mulm.
(ec_mul2): New.
(dup_point_weierstrass): Use ec_mul2.
(dup_point_twistededwards): Add special case for a == -1. Use
ec_mul2.
(add_points_weierstrass): Use ec_mul2.
(add_points_twistededwards): Add special case for a == -1.
(_gcry_mpi_ec_curve_point): Ditto.
(ec_p_init): Add hack to test Barrett functions.
* src/ec-context.h (mpi_ec_ctx_s): Add P_BARRETT.
* mpi/mpi-mod.c (_gcry_mpi_mod_barrett): Fix sign problem.
Signed-off-by: Werner Koch <wk@gnupg.org>
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* src/misc.c (count_closing_parens): New.
(_gcry_log_printsxp): Use new function.
* mpi/ec.c (_gcry_mpi_point_log): Take care of a NULL point.
Signed-off-by: Werner Koch <wk@gnupg.org>
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* src/gcrypt.h.in (_GCRY_GCC_ATTR_PRINTF): New.
(gcry_log_debug, gcry_log_debughex, gcry_log_debugmpi): New.
(gcry_log_debugpnt, gcry_log_debugsxp): New.
* src/visibility.c (gcry_log_debug): New.
(gcry_log_debughex, gcry_log_debugmpi, gcry_log_debugpnt): New.
(gcry_log_debugsxp): New.
* src/libgcrypt.def, src/libgcrypt.vers: Add new functions.
* src/misc.c (_gcry_logv): Make public.
(_gcry_log_printsxp): New.
* src/g10lib.h (log_printsxp): New macro.
--
For debugging applications it is often required to dump certain data
structures. Libgcrypt uses several internal functions for this. To
avoid re-implementing everything in the caller, we now provide access
to some of those functions.
Signed-off-by: Werner Koch <wk@gnupg.org>
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* cipher/ecc-curves.c (domain_parms): Add curve "Ed25519".
* cipher/ecc.c (reverse_buffer): New.
(eddsa_encodempi): New.
(eddsa_encodepoint): New.
(eddsa_decodepoint): New.
(sign_eddsa): Implement.
(verify_eddsa): Implement.
(ecc_sign): Init unused Q. Pass public key to sign_eddsa.
(ecc_verify): Init pk.Q if not used. Pass public key verbatim to
verify_eddsa.
* cipher/pubkey.c (sexp_elements_extract): Add arg OPAQUE. Change all
callers to pass 0.
(sexp_to_sig): Add arg OPAQUE and pass it to sexp_elements_extract.
(sexp_data_to_mpi): Allow for a zero length "value".
(gcry_pk_verify): Reorder parameter processing. Pass OPAQUE flag as
required.
* mpi/ec.c (ec_invm): Print a warning if the inverse does not exist.
(_gcry_mpi_ec_get_affine): Implement for our Twisted Edwards curve
model.
(dup_point_twistededwards): Implement.
(add_points_twistededwards): Implement.
(_gcry_mpi_ec_mul_point): Support Twisted Edwards.
* mpi/mpicoder.c (do_get_buffer): Add arg FILL_LE.
(_gcry_mpi_get_buffer): Ditto. Change all callers.
(_gcry_mpi_get_secure_buffer): Ditto.
* src/sexp.c (_gcry_sexp_nth_opaque_mpi): New.
* tests/t-ed25519.c: New.
* tests/t-ed25519.inp: New.
* tests/t-mpi-point.c (basic_ec_math_simplified): Print some output
only in debug mode.
(twistededwards_math): New test.
(main): Call new test.
--
This is a non optimized version which takes far too long. On my X220
Thinkpad the 1024 test cases take 14 seconds (12 with --sign-with-pk).
There should be a lot of room for improvements.
Signed-off-by: Werner Koch <wk@gnupg.org>
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* src/misc.c: Special case an mpi length of 0.
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* mpi/mpicoder.c (gcry_mpi_dump): Remove.
(_gcry_log_mpidump): Remove.
* src/misc.c (_gcry_log_printhex): Factor all code out to ...
(do_printhex): new. Add line wrapping a and compact printing.
(_gcry_log_printmpi): New.
* src/mpi.h (log_mpidump): Remove macro.
* src/g10lib.h (log_mpidump): Add compatibility macro.
(log_printmpi): New macro
* src/visibility.c (gcry_mpi_dump): Call _gcry_log_printmpi.
* cipher/primegen.c (prime_generate_internal): Replace gcry_mpi_dump
by log_printmpi.
(gcry_prime_group_generator): Ditto.
* cipher/pubkey.c: Remove extra colons from log_mpidump call.
* cipher/rsa.c (stronger_key_check): Use log_printmpi.
--
The values to debug get longer and longer and the different debug
functions made it hard to check them out. Now MPIs and hex buffers are
printed very similar. Lines may now wrap with an backslash as
indicator. MPIs are distinguished from plain buffers in the output by
always using a sign.
Signed-off-by: Werner Koch <wk@gnupg.org>
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* src/misc.c (_gcry_burn_stack): Change to handle 'unsigned int' bytes.
--
Unsigned integer is better here for code generation because we can now avoid
possible branching caused by (bytes <= 0) check.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
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* configure.ac (HAVE_VLA): Add check.
* src/misc.c (_gcry_burn_stack) [HAVE_VLA]: Add VLA code.
--
Some gcc versions convert _gcry_burn_stack into loop that overwrites the same
64-byte stack buffer instead of burn stack deeper. It's argued at GCC bugzilla
that _gcry_burn_stack is doing wrong thing here [1] and that this kind of
optimization is allowed.
So lets fix _gcry_burn_stack by using variable length array when VLAs are
supported by compiler. This should ensure proper stack burning to the requested
depth and avoid GCC loop optimizations.
[1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52285
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
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* src/misc.c (_gcry_burn_stack): Remove SIZEOF_UNSIGNED_LONG == 4 or 8
optimization.
--
At least GCC 4.6 on Debian Wheezy (armhf) generates wrong code for burn_stack,
causing recursive structure to be transformed in to iterative without updating
stack pointer between iterations. Therefore only first 64 bytes of stack get
zeroed. This appears to be fixed in GCC 4.7, but lets play this safe and
remove this optimization.
Better approach would probably be to add architecture specific assembly
routine(s) that replace this generic function.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
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* src/misc.c (_gcry_burn_stack): Add optimization for 32-bit and 64-bit
architectures.
--
Busy looping 'tests/benchmark --cipher-repetitions 10 cipher blowfish' on ARM
Cortex-A8 shows that _gcry_burn_stack takes 21% of CPU time. With this patch,
that number drops to 3.4%.
On AMD64 (Intel i5-4570) CPU usage for _gcry_burn_stack in the same test drops
from 3.5% to 1.1%.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
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* mpi/mpi-pow.c: Replace 1 / msize.
* mpi/mpih-div.c: Replace 1 / dsize.
* src/misc.c: Add _gcry_divide_by_zero.
--
1) Division by zero doesn't "provoke a signal" on architectures
like PowerPC.
2) C compilers like clang will optimize away these divisions, even
though the code tries "to make the compiler not remove" them.
This patch redirects these cases to _gcry_divide_by_zero.
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Check and install the standard git pre-commit hook.
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* misc.c (write2stderr): Dummy variable to silence gcc warning.
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FIPS restricted mode. Also some documentation
improvements and other minor enhancements.
See the ChangeLogs. Stay tuned.
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* global.c: Do not include <assert.h>.
* sexp.c: Likewise.
* module.c: Likewise.
* misc.c: Likewise.
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* configure.ac: Use it here instead of the generic lib test.
Bumbed LT vesion to C9/A2/R0.
* dsa.c (verify): s/exp/ex/ due to shadowing of a builtin.
* elgamal.c (verify): Ditto.
* ac.c (gcry_ac_data_get_index): s/index/idx/
(gcry_ac_data_copy_internal): Remove the cast in _gcry_malloc.
(gcry_ac_data_add): Must use gcry_realloc instead of realloc.
* pubkey.c (sexp_elements_extract): s/index/idx/ as tribute to the
forehackers.
(gcry_pk_encrypt): Removed shadowed definition of I. Reordered
arguments to malloc for clarity.
(gcry_pk_sign, gcry_pk_genkey): Ditto.
* primegen.c (prime_generate_internal): s/random/randomlevel/.
* i386/mpih-rshift.S, i386/mpih-lshift.S: Use %dl and not %edx for
testb; this avoids an assembler warning.
* mpi-pow.c (gcry_mpi_powm): s/exp/expo/ to avoid shadowing warning.
* autogen.sh: Allow to override the tool name. Do not run
libtoolize. Update required version numbers.
* libgcrypt.vers (_gcry_generate_elg_prime): Removed this symbol;
gnutls does not need it anymore.
* secmem.c (mb_get_new): s/pool/block/ due to global pool.
* misc.c (gcry_set_log_handler): s/logf/f/ to avoid shadowing
warning against a builtin.
* ath-pth-compat.c: cast pth_connect to get rid of the const
prototype.
* basic.c (check_aes128_cbc_cts_cipher): Make it a prototype
* ac.c (check_run): Comment unused variable.
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* global.c (gcry_control): Fixed typo.
* misc.c (_gcry_fatal_error): Use gpg_strerror instead of
gcry_strerror.
* types.h (STRLIST): Removed type since it is not used.
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* secmem.h (GCRY_SECMEM_FLAG_NO_WARNING,
GCRY_SECMEM_FLAG_SUSPEND_WARNING): New symbols.
* global.c (gcry_control): Use
GCRY_SECMEM_FLAG_{NO,SUSPEND}_WARNING, instead of hard-coded
values.
* secmem.c (_gcry_secmem_set_flags): Likewise.
* secmem.c (_gcry_secmem_get_flags): Likewise.
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* misc.c: Removed old FIXME, since there is already a function to
set the value of `verbosity_level'.
* gcrypt.h: Removed enumeration list: gcry_ctl_cmds.
New enumeration lists: gcry_global_control_cmds,
gcry_control_cmds, gcry_info_cmds, gcry_algo_info_cmds.
2003-03-02 Moritz Schulte <moritz@g10code.com>
* gcrypt.h (gcry_cipher_reset): New macro for resetting a handle.
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* secmem.c (DEFAULT_PAGESIZE): New symbol.
(init_pool): Use DEFAULT_PAGESIZE.
2003-02-23 Moritz Schulte <moritz@g10code.com>
* secmem.h: Fix typo in declaration of _gcry_secmem_term.
* sexp.c: Move macro definitions of `digitp', `octdigit', `alphap'
and `hexdigit' ...
* g10lib.h: ... here.
* misc.c (_gcry_burn_stack): New function (former name:
burn_stack).
* g10lib.h (burn_stack): Declare _gcry_burn_stack().
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Jeff Johnson.
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* sexp.c (dump_string,gcry_sexp_dump): Use logging functions
instead of stderr.
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