This is former security/polarssl rebranded under a new name, keeping the same
API though and providing the previous libs as symlinks, so should be used as
as drop-in replacement for security/polarssl.
Changelog since polarssl-1.3.9 follows.
= mbed TLS 1.3.11 released 2015-06-04
Security
* With authmode set to SSL_VERIFY_OPTIONAL, verification of keyUsage and
extendedKeyUsage on the leaf certificate was lost (results not accessible
via ssl_get_verify_results()).
* Add countermeasure against "Lucky 13 strikes back" cache-based attack,
https://dl.acm.org/citation.cfm?id=2714625
Features
* Improve ECC performance by using more efficient doubling formulas
(contributed by Peter Dettman).
* Add x509_crt_verify_info() to display certificate verification results.
* Add support for reading DH parameters with privateValueLength included
(contributed by Daniel Kahn Gillmor).
* Add support for bit strings in X.509 names (request by Fredrik Axelsson).
* Add support for id-at-uniqueIdentifier in X.509 names.
* Add support for overriding snprintf() (except on Windows) and exit() in
the platform layer.
* Add an option to use macros instead of function pointers in the platform
layer (helps get rid of unwanted references).
* Improved Makefiles for Windows targets by fixing library targets and making
cross-compilation easier (thanks to Alon Bar-Lev).
* The benchmark program also prints heap usage for public-key primitives
if POLARSSL_MEMORY_BUFFER_ALLOC_C and POLARSSL_MEMORY_DEBUG are defined.
* New script ecc-heap.sh helps measuring the impact of ECC parameters on
speed and RAM (heap only for now) usage.
* New script memory.sh helps measuring the ROM and RAM requirements of two
reduced configurations (PSK-CCM and NSA suite B).
* Add config flag POLARSSL_DEPRECATED_WARNING (off by default) to produce
warnings on use of deprecated functions (with GCC and Clang only).
* Add config flag POLARSSL_DEPRECATED_REMOVED (off by default) to produce
errors on use of deprecated functions.
Bugfix
* Fix compile errors with PLATFORM_NO_STD_FUNCTIONS.
* Fix compile error with PLATFORM_EXIT_ALT (thanks to Rafał Przywara).
* Fix bug in entropy.c when THREADING_C is also enabled that caused
entropy_free() to crash (thanks to Rafał Przywara).
* Fix memory leak when gcm_setkey() and ccm_setkey() are used more than
once on the same context.
* Fix bug in ssl_mail_client when password is longer that username (found
by Bruno Pape).
* Fix undefined behaviour (memcmp( NULL, NULL, 0 );) in X.509 modules
(detected by Clang's 3.6 UBSan).
* mpi_size() and mpi_msb() would segfault when called on an mpi that is
initialized but not set (found by pravic).
* Fix detection of support for getrandom() on Linux (reported by syzzer) by
doing it at runtime (using uname) rather that compile time.
* Fix handling of symlinks by "make install" (found by Gaël PORTAY).
* Fix potential NULL pointer dereference (not trigerrable remotely) when
ssl_write() is called before the handshake is finished (introduced in
1.3.10) (first reported by Martin Blumenstingl).
* Fix bug in pk_parse_key() that caused some valid private EC keys to be
rejected.
* Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos).
* Fix thread safety bug in RSA operations (found by Fredrik Axelsson).
* Fix hardclock() (only used in the benchmarking program) with some
versions of mingw64 (found by kxjhlele).
* Fix warnings from mingw64 in timing.c (found by kxjklele).
* Fix potential unintended sign extension in asn1_get_len() on 64-bit
platforms.
* Fix potential memory leak in ssl_set_psk() (found by Mansour Moufid).
* Fix compile error when POLARSSL_SSL_DISABLE_RENEGOTATION and
POLARSSL_SSL_SSESSION_TICKETS where both enabled in config.h (introduced
in 1.3.10).
* Add missing extern "C" guard in aesni.h (reported by amir zamani).
* Add missing dependency on SHA-256 in some x509 programs (reported by
Gergely Budai).
* Fix bug related to ssl_set_curves(): the client didn't check that the
curve picked by the server was actually allowed.
Changes
* Remove bias in mpi_gen_prime (contributed by Pascal Junod).
* Remove potential sources of timing variations (some contributed by Pascal
Junod).
* Options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 are deprecated.
* Enabling POLARSSL_NET_C without POLARSSL_HAVE_IPV6 is deprecated.
* compat-1.2.h and openssl.h are deprecated.
* Adjusting/overriding CFLAGS and LDFLAGS with the make build system is now
more flexible (warning: OFLAGS is not used any more) (see the README)
(contributed by Alon Bar-Lev).
* ssl_set_own_cert() no longer calls pk_check_pair() since the
performance impact was bad for some users (this was introduced in 1.3.10).
* Move from SHA-1 to SHA-256 in example programs using signatures
(suggested by Thorsten Mühlfelder).
* Remove some unneeded inclusions of header files from the standard library
"minimize" others (eg use stddef.h if only size_t is needed).
* Change #include lines in test files to use double quotes instead of angle
brackets for uniformity with the rest of the code.
* Remove dependency on sscanf() in X.509 parsing modules.
= mbed TLS 1.3.10 released 2015-02-09
Security
* NULL pointer dereference in the buffer-based allocator when the buffer is
full and polarssl_free() is called (found by Mark Hasemeyer)
(only possible if POLARSSL_MEMORY_BUFFER_ALLOC_C is enabled, which it is
not by default).
* Fix remotely-triggerable uninitialised pointer dereference caused by
crafted X.509 certificate (TLS server is not affected if it doesn't ask for a
client certificate) (found using Codenomicon Defensics).
* Fix remotely-triggerable memory leak caused by crafted X.509 certificates
(TLS server is not affected if it doesn't ask for a client certificate)
(found using Codenomicon Defensics).
* Fix potential stack overflow while parsing crafted X.509 certificates
(TLS server is not affected if it doesn't ask for a client certificate)
(found using Codenomicon Defensics).
* Fix timing difference that could theoretically lead to a
Bleichenbacher-style attack in the RSA and RSA-PSK key exchanges
(reported by Sebastian Schinzel).
Features
* Add support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv).
* Add support for Extended Master Secret (draft-ietf-tls-session-hash).
* Add support for Encrypt-then-MAC (RFC 7366).
* Add function pk_check_pair() to test if public and private keys match.
* Add x509_crl_parse_der().
* Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the
length of an X.509 verification chain.
* Support for renegotiation can now be disabled at compile-time
* Support for 1/n-1 record splitting, a countermeasure against BEAST.
* Certificate selection based on signature hash, preferring SHA-1 over SHA-2
for pre-1.2 clients when multiple certificates are available.
* Add support for getrandom() syscall on recent Linux kernels with Glibc or
a compatible enough libc (eg uClibc).
* Add ssl_set_arc4_support() to make it easier to disable RC4 at runtime
while using the default ciphersuite list.
* Added new error codes and debug messages about selection of
ciphersuite/certificate.
Bugfix
* Stack buffer overflow if ctr_drbg_update() is called with too large
add_len (found by Jean-Philippe Aumasson) (not triggerable remotely).
* Possible buffer overflow of length at most POLARSSL_MEMORY_ALIGN_MULTIPLE
if memory_buffer_alloc_init() was called with buf not aligned and len not
a multiple of POLARSSL_MEMORY_ALIGN_MULTIPLE (not triggerable remotely).
* User set CFLAGS were ignored by Cmake with gcc (introduced in 1.3.9, found
by Julian Ospald).
* Fix potential undefined behaviour in Camellia.
* Fix potential failure in ECDSA signatures when POLARSSL_ECP_MAX_BITS is a
multiple of 8 (found by Gergely Budai).
* Fix unchecked return code in x509_crt_parse_path() on Windows (found by
Peter Vaskovic).
* Fix assembly selection for MIPS64 (thanks to James Cowgill).
* ssl_get_verify_result() now works even if the handshake was aborted due
to a failed verification (found by Fredrik Axelsson).
* Skip writing and parsing signature_algorithm extension if none of the
key exchanges enabled needs certificates. This fixes a possible interop
issue with some servers when a zero-length extension was sent. (Reported
by Peter Dettman.)
* On a 0-length input, base64_encode() did not correctly set output length
(found by Hendrik van den Boogaard).
Changes
* Use deterministic nonces for AEAD ciphers in TLS by default (possible to
switch back to random with POLARSSL_SSL_AEAD_RANDOM_IV in config.h).
* Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined.
* ssl_set_own_cert() now returns an error on key-certificate mismatch.
* Forbid repeated extensions in X.509 certificates.
* debug_print_buf() now prints a text view in addition to hexadecimal.
* A specific error is now returned when there are ciphersuites in common
but none of them is usable due to external factors such as no certificate
with a suitable (extended)KeyUsage or curve or no PSK set.
* It is now possible to disable negotiation of truncated HMAC server-side
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