Add X25519 to TLS supported curve list.
Reject attempts to configure keys which cannot be used
for signing.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
Add a flag to EC_METHOD for curves which do not support signing.
New function EC_KEY_can_sign() returns 1 is key can be used for signing.
Return an explicit error is an attempt is made to sign with
no signing curves.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
In some cases the EC_POINT and EC_KEY BIGNUM components are suboptimal
or inappropriate. Add an "custom_data" field which curves can populate with
a custom structure to suit their needs.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
Extract compression form in EC_KEY_oct2key() instead of manually in the
ASN.1 code. For custom curves do not assume the initial octet is the
compression form: it isn't for X25519 et al.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
Add support for optional overrides of various private key operations
in EC_METHOD.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
In EC_KEY_priv2buf(), check for pbuf sanity.
If invoked with NULL, gracefully returns the key length.
Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Simplifies calling code. Also fixed up any !ptr tests that were
nearby, turning them into NULL tests.
Reviewed-by: Richard Levitte <levitte@openssl.org>
This takes us away from the idea that we know exactly how our static
libraries are going to get used. Instead, we make them available to
build shareable things with, be it other shared libraries or DSOs.
On the other hand, we also have greater control of when the shared
library cflags. They will never be used with object files meant got
binaries, such as apps/openssl or test/test*.
With unified, we take this a bit further and prepare for having to
deal with extra cflags specifically to be used with DSOs (dynamic
engines), libraries and binaries (applications).
Reviewed-by: Rich Salz <rsalz@openssl.org>
All those flags existed because we had all the dependencies versioned
in the repository, and wanted to have it be consistent, no matter what
the local configuration was. Now that the dependencies are gone from
the versioned Makefile.ins, it makes much more sense to use the exact
same flags as when compiling the object files.
Reviewed-by: Rich Salz <rsalz@openssl.org>
It seems that on some platforms, the perlasm scripts call the C
compiler for certain checks. These scripts need the environment
variable CC to have the C compiler command.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Add new function EC_KEY_priv2buf() to allocated and encode private
key octet in one call. Update and simplify ASN.1 and print routines.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
New functions EC_KEY_oct2priv and EC_KEY_priv2oct. These are private key
equivalents of EC_POINT_oct2point and EC_POINT_point2oct which convert
between the private key octet format and EC_KEY.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Those even order that do not play nicely with Montgomery arithmetic
Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
Now that we have the foundation for the "unified" build scheme in
place, we add build.info files. They have been generated from the
Makefiles in the same directories. Things that are platform specific
will appear in later commits.
Reviewed-by: Andy Polyakov <appro@openssl.org>
d2i_ECPrivateKey always caculates the public key so there is
no need to caculate it again in eckey_priv_decode().
Reviewed-by: Rich Salz <rsalz@openssl.org>
New functions to return internal pointer for order and cofactor. This
avoids the need to allocate a new BIGNUM which to copy the value to.
Simplify code to use new functions.
Reviewed-by: Rich Salz <rsalz@openssl.org>
There was an unused macro in ssl_locl.h that used an internal
type, so I removed it.
Move bio_st from bio.h to ossl_type.h
Reviewed-by: Andy Polyakov <appro@openssl.org>
During precomputation if the group given is well known then we memcpy a
well known precomputation. However we go the wrong label in the code and
don't store the data properly. Consequently if we call have_precompute_mult
the data isn't there and we return 0.
RT#3600
Reviewed-by: Richard Levitte <levitte@openssl.org>
This was done by the following
find . -name '*.[ch]' | /tmp/pl
where /tmp/pl is the following three-line script:
print unless $. == 1 && m@/\* .*\.[ch] \*/@;
close ARGV if eof; # Close file to reset $.
And then some hand-editing of other files.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Remove lint, tags, dclean, tests.
This is prep for a new makedepend scheme.
This is temporary pending unified makefile, and might help it.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add CRYPTO_EX_DATA add EndC_KEY_[gs]et_method, From Roumen Petrov.
Had to add various exdata calls to init/copy/free the exdata.
Had to remove const from some EC functions because exdata isn't
const-correct. :(
Also remove EC_EXTRA_DATA and use a union to hold the possible
pre-computed values and an enum to tell which value is in the
union. (Rich Salz)
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
Create Makefile's from Makefile.in
Rename Makefile.org to Makefile.in
Rename Makefiles to Makefile.in
Address review feedback from Viktor and Richard
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Only two macros CRYPTO_MDEBUG and CRYPTO_MDEBUG_ABORT to control this.
If CRYPTO_MDEBUG is not set, #ifdef out the whole debug machinery.
(Thanks to Jakob Bohm for the suggestion!)
Make the "change wrapper functions" be the only paradigm.
Wrote documentation!
Format the 'set func' functions so their paramlists are legible.
Format some multi-line comments.
Remove ability to get/set the "memory debug" functions at runtme.
Remove MemCheck_* and CRYPTO_malloc_debug_init macros.
Add CRYPTO_mem_debug(int flag) function.
Add test/memleaktest.
Rename CRYPTO_malloc_init to OPENSSL_malloc_init; remove needless calls.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Rename BUF_{strdup,strlcat,strlcpy,memdup,strndup,strnlen}
to OPENSSL_{strdup,strlcat,strlcpy,memdup,strndup,strnlen}
Add #define's for the old names.
Add CRYPTO_{memdup,strndup}, called by OPENSSL_{memdup,strndup} macros.
Reviewed-by: Tim Hudson <tjh@openssl.org>
New functions EC_POINT_point2buf and EC_KEY_key2buf which encode
a point and allocate a buffer in one call.
New function EC_KEY_oct2key() which sets public key in an EC_KEY
structure from an encoded point.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Make EVP_PKEY_copy_parameters() work if the destination has no type
(e.g. if obtained from EVP_PKEY_new()) or the underlying key is NULL.
This is useful where we want to copy the parameters from an existing
key to a new key.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Rename ENGINE _EC_KEY functions to _EC.
Add support for EC_KEY_METHOD in ENGINE_set_default et al. Copy
ec_meth.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add set_group, set_public and set_private methods. An EC_KEY_METHOD can use
these to perform any appropriate operation when the key components are set,
such as caching data in some more convenient ENGINE specific format or
returning an error if the parameters are invalid or the operation is
not supported.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Rename ecdh_compute_key into ossl_ecdh_compute_key and modify it
to use EC error codes. Remove superfluous old ECDH functions.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add keygen to EC_KEY_METHOD. Redirect EC_KEY_generate_key through
method and set the current EC key generation function as the default.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add EC_KEY_METHOD. This is part of the EC revision and will make EC behave
more like other algorithms. Specifically:
EC_KEY_METHOD is part of EC_KEY.
It is part of ENGINE.
Default or key specific implementations can be provided to redirect some
or all operations.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Rebuild error source files: the new mkerr.pl functionality will now
pick up and translate static function names properly.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Much related/similar work also done by
Ivan Nestlerode <ivan.nestlerode@sonos.com>
+Replace FILE BIO's with dummy ops that fail.
+Include <stdio.h> for sscanf() even with no-stdio (since the declaration
is there). We rely on sscanf() to parse the OPENSSL_ia32cap environment
variable, since it can be larger than a 'long'. And we don't rely on the
availability of strtoull().
+Remove OPENSSL_stderr(); not used.
+Make OPENSSL_showfatal() do nothing (currently without stdio there's
nothing we can do).
+Remove file-based functionality from ssl/. The function
prototypes were already gone, but not the functions themselves.
+Remove unviable conf functionality via SYS_UEFI
+Add fallback definition of BUFSIZ.
+Remove functions taking FILE * from header files.
+Add missing DECLARE_PEM_write_fp_const
+Disable X509_LOOKUP_hash_dir(). X509_LOOKUP_file() was already compiled out,
so remove its prototype.
+Use OPENSSL_showfatal() in CRYPTO_destroy_dynlockid().
+Eliminate SRP_VBASE_init() and supporting functions. Users will need to
build the verifier manually instead.
+Eliminate compiler warning for unused do_pk8pkey_fp().
+Disable TEST_ENG_OPENSSL_PKEY.
+Disable GOST engine as is uses [f]printf all over the place.
+Eliminate compiler warning for unused send_fp_chars().
Signed-off-by: Rich Salz <rsalz@akamai.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
As some of ARM processors, more specifically Cortex-Mx series, are
Thumb2-only, we need to support Thumb2-only builds even in assembly.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Also has changes from from David Woodhouse <David.Woodhouse@intel.com>
and some tweaks from me.
Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
There are many places (nearly 50) where we malloc and then memset.
Add an OPENSSL_zalloc routine to encapsulate that.
(Missed one conversion; thanks Richard)
Also fixes GH328
Reviewed-by: Richard Levitte <levitte@openssl.org>
EC_KEY_set_public_key_affine_coordinates was using some variables that only
apply if OPENSSL_NO_EC2M is not defined.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Add secure heap for storage of private keys (when possible).
Add BIO_s_secmem(), CBIGNUM, etc.
Add BIO_CTX_secure_new so all BIGNUM's in the context are secure.
Contributed by Akamai Technologies under the Corporate CLA.
Reviewed-by: Richard Levitte <levitte@openssl.org>
The function EC_POINT_is_on_curve does not return a boolean value.
It returns 1 if the point is on the curve, 0 if it is not, and -1
on error. Many usages within OpenSSL were incorrectly using this
function and therefore not correctly handling error conditions.
With thanks to the Open Crypto Audit Project for reporting this issue.
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
We had updates of certain header files in both Makefile.org and the
Makefile in the directory the header file lived in. This is error
prone and also sometimes generates slightly different results (usually
just a comment that differs) depending on which way the update was
done.
This removes the file update targets from the top level Makefile, adds
an update: target in all Makefiles and has it depend on the depend: or
local_depend: targets, whichever is appropriate, so we don't get a
double run through the whole file tree.
Reviewed-by: Rich Salz <rsalz@openssl.org>
There are header files in crypto/ that are used by a number of crypto/
submodules. Move those to crypto/include/internal and adapt the
affected source code and Makefiles.
The header files that got moved are:
crypto/cryptolib.h
crypto/md32_common.h
Reviewed-by: Rich Salz <rsalz@openssl.org>
For the various string-compare routines (strcmp, strcasecmp, str.*cmp)
use "strcmp()==0" instead of "!strcmp()"
Reviewed-by: Tim Hudson <tjh@openssl.org>
Just as with the OPENSSL_malloc calls, consistently use sizeof(*ptr)
for memset and memcpy. Remove needless casts for those functions.
For memset, replace alternative forms of zero with 0.
Reviewed-by: Richard Levitte <levitte@openssl.org>
For a local variable:
TYPE *p;
Allocations like this are "risky":
p = OPENSSL_malloc(sizeof(TYPE));
if the type of p changes, and the malloc call isn't updated, you
could get memory corruption. Instead do this:
p = OPENSSL_malloc(sizeof(*p));
Also fixed a few memset() calls that I noticed while doing this.
Reviewed-by: Richard Levitte <levitte@openssl.org>
After the finale, the "real" final part. :) Do a recursive grep with
"-B1 -w [a-zA-Z0-9_]*_free" to see if any of the preceeding lines are
an "if NULL" check that can be removed.
Reviewed-by: Tim Hudson <tjh@openssl.org>
This gets BN_.*free:
BN_BLINDING_free BN_CTX_free BN_FLG_FREE BN_GENCB_free
BN_MONT_CTX_free BN_RECP_CTX_free BN_clear_free BN_free BUF_MEM_free
Also fix a call to DSA_SIG_free to ccgost engine and remove some #ifdef'd
dead code in engines/e_ubsec.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Add a sanity check to the print_bin function to ensure that the |off|
argument is positive. Thanks to Kevin Wojtysiak (Int3 Solutions) and
Paramjot Oberoi (Int3 Solutions) for reporting this issue.
Reviewed-by: Andy Polyakov <appro@openssl.org>
Add OPENSSL_clear_free which merges cleanse and free.
(Names was picked to be similar to BN_clear_free, etc.)
Removed OPENSSL_freeFunc macro.
Fixed the small simple ones that are left:
CRYPTO_free CRYPTO_free_locked OPENSSL_free_locked
Reviewed-by: Richard Levitte <levitte@openssl.org>
Don't check for NULL before calling a free routine. This gets X509_.*free:
x509_name_ex_free X509_policy_tree_free X509_VERIFY_PARAM_free
X509_STORE_free X509_STORE_CTX_free X509_PKEY_free
X509_OBJECT_free_contents X509_LOOKUP_free X509_INFO_free
Reviewed-by: Richard Levitte <levitte@openssl.org>
Do not check for NULL before calling a free routine. This addresses:
ASN1_BIT_STRING_free ASN1_GENERALIZEDTIME_free ASN1_INTEGER_free
ASN1_OBJECT_free ASN1_OCTET_STRING_free ASN1_PCTX_free ASN1_SCTX_free
ASN1_STRING_clear_free ASN1_STRING_free ASN1_TYPE_free
ASN1_UTCTIME_free M_ASN1_free_of
Reviewed-by: Richard Levitte <levitte@openssl.org>
It should have freed them when != NULL, not when == NULL.
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Viktor Dukhovni <openssl-users@dukhovni.org>
With no more symlinks, there's no need for those variables, or the links
target. This also goes for all install: and uninstall: targets that do
nothing but copy $(EXHEADER) files, since that's now taken care of by the
top Makefile.
Also, removed METHTEST from test/Makefile. It looks like an old test that's
forgotten...
Reviewed-by: Rich Salz <rsalz@openssl.org>
Rather than making include/openssl/foo.h a symlink to
crypto/foo/foo.h, this change moves the file to include/openssl/foo.h
once and for all.
Likewise, move crypto/foo/footest.c to test/footest.c, instead of
symlinking it there.
Originally-by: Geoff Thorpe <geoff@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
RFC5915 requires the use of the I2OSP primitive as defined in RFC3447
for storing an EC Private Key. This converts the private key into an
OCTETSTRING and retains any leading zeros. This commit ensures that those
leading zeros are present if required.
Reviewed-by: Andy Polyakov <appro@openssl.org>
EVP_.*free; this gets:
EVP_CIPHER_CTX_free EVP_PKEY_CTX_free EVP_PKEY_asn1_free
EVP_PKEY_asn1_set_free EVP_PKEY_free EVP_PKEY_free_it
EVP_PKEY_meth_free; and also EVP_CIPHER_CTX_cleanup
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Move ASN.1 internals used across multiple directories into new internal
header file asn1_int.h remove crypto/Makefile hack which allowed other
directories to include "asn1_locl.h"
Reviewed-by: Matt Caswell <matt@openssl.org>
Start ensuring all OpenSSL "free" routines allow NULL, and remove
any if check before calling them.
This gets ASN1_OBJECT_free and ASN1_STRING_free.
Reviewed-by: Matt Caswell <matt@openssl.org>
Remove old M_ASN1_ macros and replace any occurences with the corresponding
function.
Remove d2i_ASN1_bytes, d2i_ASN1_SET, i2d_ASN1_SET: no longer used internally.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Many applications require named curve parameter encoding instead of explicit
parameter encoding (including the TLS library in OpenSSL itself). Set this
encoding by default instead of requiring an explicit call to set it.
Add OPENSSL_EC_EXPLICT_CURVE define.
Reviewed-by: Matt Caswell <matt@openssl.org>
The following compile options (#ifdef's) are removed:
OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY
OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP
OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK
OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY
This diff is big because of updating the indents on preprocessor lines.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Sometimes it fails to format them very well, and sometimes it corrupts them!
This commit moves some particularly problematic ones.
Reviewed-by: Tim Hudson <tjh@openssl.org>
OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160
OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO
Two typo's on #endif comments fixed:
OPENSSL_NO_ECB fixed to OPENSSL_NO_OCB
OPENSSL_NO_HW_SureWare fixed to OPENSSL_NO_HW_SUREWARE
Reviewed-by: Richard Levitte <levitte@openssl.org>
Various build fixes, mostly uncovered by clang's unused-const-variable
and unused-function errors.
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
(cherry picked from commit 0e1c318ece)
ECDH_compute_key is silently ignored and the KDF is run on duff data
Thanks to github user tomykaira for the suggested fix.
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
Facilitate switch to custom scatter-gather routines. This modification
does not change algorithms, only makes it possible to implement
alternative. This is achieved by a) moving precompute table to assembly
(perlasm parses ecp_nistz256_table.c and is free to rearrange data to
match gathering algorithm); b) adhering to explicit scatter subroutine
(which for now is simply a memcpy). First implementations that will use
this option are 32-bit assembly implementations, ARMv4 and x86, where
equivalent of current read-whole-table-select-single-value algorithm
is too time-consuming. [On side note, switching to scatter-gather on
x86_64 would allow to improve server-side ECDSA performance by ~5%].
Reviewed-by: Bodo Moeller <bodo@openssl.org>
This is a more comprehensive fix. It changes all
keygen apps to use 2K keys. It also changes the
default to use SHA256 not SHA1. This is from
Kurt's upstream Debian changes.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
The old code implicitly relies on the ASN.1 code returning a \0-prefixed buffer
when the buffer length is 0. Change this to verify explicitly that the ASN.1 string
has positive length.
Reviewed-by: Dr Stephen Henson <steve@openssl.org>
When d2i_ECPrivateKey reads a private key with a missing (optional) public key,
generate one automatically from the group and private key.
Reviewed-by: Dr Stephen Henson <steve@openssl.org>
This change saves several EC routines from crashing when an EC_KEY is
missing a public key. The public key is optional in the EC private key
format and, without this patch, running the following through `openssl
ec` causes a crash:
-----BEGIN EC PRIVATE KEY-----
MBkCAQEECAECAwQFBgcIoAoGCCqGSM49AwEH
-----END EC PRIVATE KEY-----
Reviewed-by: Dr Stephen Henson <steve@openssl.org>
Fix for the attack described in the paper "Recovering OpenSSL
ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
by Yuval Yarom and Naomi Benger. Details can be obtained from:
http://eprint.iacr.org/2014/140
Thanks to Yuval Yarom and Naomi Benger for discovering this
flaw and to Yuval Yarom for supplying a fix.
(cherry picked from commit 2198be3483)
Conflicts:
CHANGES
- EC_GROUP_cmp shouldn't consider curves equal just because
the curve name is the same. (They really *should* be the same
in this case, but there's an EC_GROUP_set_curve_name API,
which could be misused.)
- EC_POINT_cmp shouldn't return 0 for ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
or EC_R_INCOMPATIBLE_OBJECTS errors because in a cmp API, 0 indicates
equality (not an error).
Reported by: king cope
Add X9.42 DH KDF. Move sharedinfo generation code to CMS library as the
same structure is used by DH and ECDH.
Move ASN1_OBJECT typedef to ossl_typ.h so it can be picked up by dh headers
without the need to use ASN1.
Add support for ECDH in enveloped data. The CMS ctrls for the EC ASN1
method decode/encode the appropriate parameters from the CMS ASN1 data
and send appropriate data to the EC public key method.
This change updates 8a99cb29 to make the generation of (EC)DSA nonces
using the message digest the default. It also reverts the changes to
(EC)DSA_METHOD structure.
In addition to making it the default, removing the flag from EC_KEY
means that FIPS modules will no longer have an ABI mismatch.
This change adds the option to calculate (EC)DSA nonces by hashing the
message and private key along with entropy to avoid leaking the private
key if the PRNG fails.
Have EC_NISTP224_64_GCC_128 treated like any algorithm, and have
disabled by default. If we don't do it this way, it screws up
libeay.num.
* util/libeay.num: make update
This meant alarger renumbering in util/libeay.num due to symbols
appearing in 1.0.0-stable and 1.0.1-stable. However, since there's
been no release on this branch yet, it should be harmless.
Move compression, point2oct and oct2point functions into separate files.
Add a flags field to EC_METHOD.
Add a flag EC_FLAGS_DEFAULT_OCT to use the default compession and oct
functions (all existing methods do this). This removes dependencies from
EC_METHOD while keeping original functionality.
seed to: this doesn't introduce any binary compatibility issues as the
function is only used internally.
The seed output is needed for FIPS 140-2 algorithm testing: the functionality
used to be in DSA_generate_parameters_ex() but was removed in OpenSSL 1.0.0
now print out signatures instead of the standard hex dump.
More complex signatures (e.g. PSS) can print out more meaningful information.
Sample DSA version included that prints out the signature parameters r, s.
[Note EVP_PKEY_ASN1_METHOD is an application opaque structure so adding
new fields in the middle has no compatibility issues]
knock-on work than expected - they've been extracted into a patch
series that can be completed elsewhere, or in a different branch,
before merging back to HEAD.
deprecate the original (numeric-only) scheme, and replace with the
CRYPTO_THREADID object. This hides the platform-specifics and should reduce
the possibility for programming errors (where failing to explicitly check
both thread ID forms could create subtle, platform-specific bugs).
Thanks to Bodo, for invaluable review and feedback.
to 'unsigned long' (ie. odd platforms/compilers), so a pointer-typed
version was added but it required portable code to check *both* modes to
determine equality. This commit maintains the availability of both thread
ID types, but deprecates the type-specific accessor APIs that invoke the
callbacks - instead a single type-independent API is used. This simplifies
software that calls into this interface, and should also make it less
error-prone - as forgetting to call and compare *both* thread ID accessors
could have led to hard-to-debug/infrequent bugs (that might only affect
certain platforms or thread implementations). As the CHANGES note says,
there were corresponding deprecations and replacements in the
thread-related functions for BN_BLINDING and ERR too.
