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Vault 8

Source code and analysis for CIA software projects including those described in the Vault7 series.

This publication will enable investigative journalists, forensic experts and the general public to better identify and understand covert CIA infrastructure components.

Source code published in this series contains software designed to run on servers controlled by the CIA. Like WikiLeaks' earlier Vault7 series, the material published by WikiLeaks does not contain 0-days or similar security vulnerabilities which could be repurposed by others.

PolarSSL ChangeLog (Sorted per branch, date)

= PolarSSL 1.3.4 released on 2014-01-27
Features
   * Support for the Koblitz curves: secp192k1, secp224k1, secp256k1
   * Support for RIPEMD-160
   * Support for AES CFB8 mode
   * Support for deterministic ECDSA (RFC 6979)

Bugfix
   * Potential memory leak in bignum_selftest()
   * Replaced expired test certificate
   * ssl_mail_client now terminates lines with CRLF, instead of LF
   * net module handles timeouts on blocking sockets better (found by Tilman
     Sauerbeck)
   * Assembly format fixes in bn_mul.h

Security
   * Missing MPI_CHK calls added around unguarded mpi calls (found by
     TrustInSoft)

= PolarSSL 1.3.3 released on 2013-12-31
Features
   * EC key generation support in gen_key app
   * Support for adhering to client ciphersuite order preference
     (POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
   * Support for Curve25519
   * Support for ECDH-RSA and ECDH-ECDSA key exchanges and ciphersuites
   * Support for IPv6 in the NET module
   * AES-NI support for AES, AES-GCM and AES key scheduling
   * SSL Pthread-based server example added (ssl_pthread_server)

Changes
   * gen_prime() speedup
   * Speedup of ECP multiplication operation
   * Relaxed some SHA2 ciphersuite's version requirements
   * Dropped use of readdir_r() instead of readdir() with threading support
   * More constant-time checks in the RSA module
   * Split off curves from ecp.c into ecp_curves.c
   * Curves are now stored fully in ROM
   * Memory usage optimizations in ECP module
   * Removed POLARSSL_THREADING_DUMMY

Bugfix
   * Fixed bug in mpi_set_bit() on platforms where t_uint is wider than int
   * Fixed X.509 hostname comparison (with non-regular characters)
   * SSL now gracefully handles missing RNG
   * Missing defines / cases for RSA_PSK key exchange
   * crypt_and_hash app checks MAC before final decryption
   * Potential memory leak in ssl_ticket_keys_init()
   * Memory leak in benchmark application
   * Fixed x509_crt_parse_path() bug on Windows platforms
   * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by
     TrustInSoft)
   * Fixed potential overflow in certificate size verification in
     ssl_write_certificate() (found by TrustInSoft)

Security
   * Possible remotely-triggered out-of-bounds memory access fixed (found by
     TrustInSoft)

= PolarSSL 1.3.2 released on 2013-11-04
Features
   * PK tests added to test framework
   * Added optional optimization for NIST MODP curves (POLARSSL_ECP_NIST_OPTIM)
   * Support for Camellia-GCM mode and ciphersuites

Changes
   * Padding checks in cipher layer are now constant-time
   * Value comparisons in SSL layer are now constant-time
   * Support for serialNumber, postalAddress and postalCode in X509 names
   * SSL Renegotiation was refactored

Bugfix
   * More stringent checks in cipher layer
   * Server does not send out extensions not advertised by client
   * Prevent possible alignment warnings on casting from char * to 'aligned *'
   * Misc fixes and additions to dependency checks
   * Const correctness
   * cert_write with selfsign should use issuer_name as subject_name
   * Fix ECDSA corner case: missing reduction mod N (found by DualTachyon)
   * Defines to handle UEFI environment under MSVC
   * Server-side initiated renegotiations send HelloRequest

= PolarSSL 1.3.1 released on 2013-10-15
Features
   * Support for Brainpool curves and TLS ciphersuites (RFC 7027)
   * Support for ECDHE-PSK key-exchange and ciphersuites
   * Support for RSA-PSK key-exchange and ciphersuites

Changes
   * RSA blinding locks for a smaller amount of time
   * TLS compression only allocates working buffer once
   * Introduced POLARSSL_HAVE_READDIR_R for systems without it
   * config.h is more script-friendly

Bugfix
   * Missing MSVC defines added
   * Compile errors with POLARSSL_RSA_NO_CRT
   * Header files with 'polarssl/'
   * Const correctness
   * Possible naming collision in dhm_context
   * Better support for MSVC
   * threading_set_alt() name
   * Added missing x509write_crt_set_version()

= PolarSSL 1.3.0 released on 2013-10-01
Features
   * Elliptic Curve Cryptography module added
   * Elliptic Curve Diffie Hellman module added
   * Ephemeral Elliptic Curve Diffie Hellman support for SSL/TLS
    (ECDHE-based ciphersuites)
   * Ephemeral Elliptic Curve Digital Signature Algorithm support for SSL/TLS
    (ECDSA-based ciphersuites)
   * Ability to specify allowed ciphersuites based on the protocol version.
   * PSK and DHE-PSK based ciphersuites added
   * Memory allocation abstraction layer added
   * Buffer-based memory allocator added (no malloc() / free() / HEAP usage)
   * Threading abstraction layer added (dummy / pthread / alternate)
   * Public Key abstraction layer added
   * Parsing Elliptic Curve keys
   * Parsing Elliptic Curve certificates
   * Support for max_fragment_length extension (RFC 6066)
   * Support for truncated_hmac extension (RFC 6066)
   * Support for zeros-and-length (ANSI X.923) padding, one-and-zeros
     (ISO/IEC 7816-4) padding and zero padding in the cipher layer
   * Support for session tickets (RFC 5077)
   * Certificate Request (CSR) generation with extensions (key_usage,
     ns_cert_type)
   * X509 Certificate writing with extensions (basic_constraints,
     issuer_key_identifier, etc)
   * Optional blinding for RSA, DHM and EC
   * Support for multiple active certificate / key pairs in SSL servers for
   	 the same host (Not to be confused with SNI!)

Changes
   * Ability to enable / disable SSL v3 / TLS 1.0 / TLS 1.1 / TLS 1.2
     individually
   * Introduced separate SSL Ciphersuites module that is based on
     Cipher and MD information
   * Internals for SSL module adapted to have separate IV pointer that is
     dynamically set (Better support for hardware acceleration)
   * Moved all OID functionality to a separate module. RSA function
     prototypes for the RSA sign and verify functions changed as a result
   * Split up the GCM module into a starts/update/finish cycle
   * Client and server now filter sent and accepted ciphersuites on minimum
     and maximum protocol version
   * Ability to disable server_name extension (RFC 6066)
   * Renamed error_strerror() to the less conflicting polarssl_strerror()
     (Ability to keep old as well with POLARSSL_ERROR_STRERROR_BC)
   * SHA2 renamed to SHA256, SHA4 renamed to SHA512 and functions accordingly
   * All RSA operations require a random generator for blinding purposes
   * X509 core refactored
   * x509_crt_verify() now case insensitive for cn (RFC 6125 6.4)
   * Also compiles / runs without time-based functions (!POLARSSL_HAVE_TIME)
   * Support faulty X509 v1 certificates with extensions
     (POLARSSL_X509_ALLOW_EXTENSIONS_NON_V3)

Bugfix
   * Fixed parse error in ssl_parse_certificate_request()
   * zlib compression/decompression skipped on empty blocks
   * Support for AIX header locations in net.c module
   * Fixed file descriptor leaks

Security
   * RSA blinding on CRT operations to counter timing attacks
     (found by Cyril Arnaud and Pierre-Alain Fouque)

= Version 1.2.10 released 2013-10-07
Changes
   * Changed RSA blinding to a slower but thread-safe version

Bugfix
   * Fixed memory leak in RSA as a result of introduction of blinding
   * Fixed ssl_pkcs11_decrypt() prototype
   * Fixed MSVC project files

= Version 1.2.9 released 2013-10-01
Changes
   * x509_verify() now case insensitive for cn (RFC 6125 6.4)

Bugfix
   * Fixed potential memory leak when failing to resume a session
   * Fixed potential file descriptor leaks (found by Remi Gacogne)
   * Minor fixes

Security
   * Fixed potential heap buffer overflow on large hostname setting
   * Fixed potential negative value misinterpretation in load_file()
   * RSA blinding on CRT operations to counter timing attacks
     (found by Cyril Arnaud and Pierre-Alain Fouque)

= Version 1.2.8 released 2013-06-19
Features
   * Parsing of PKCS#8 encrypted private key files
   * PKCS#12 PBE and derivation functions
   * Centralized module option values in config.h to allow user-defined
     settings without editing header files by using POLARSSL_CONFIG_OPTIONS

Changes
   * HAVEGE random generator disabled by default
   * Internally split up x509parse_key() into a (PEM) handler function
     and specific DER parser functions for the PKCS#1 and unencrypted
     PKCS#8 private key formats
   * Added mechanism to provide alternative implementations for all
     symmetric cipher and hash algorithms (e.g. POLARSSL_AES_ALT in
	 config.h)
   * PKCS#5 module added. Moved PBKDF2 functionality inside and deprecated
     old PBKDF2 module

Bugfix
   * Secure renegotiation extension should only be sent in case client
     supports secure renegotiation
   * Fixed offset for cert_type list in ssl_parse_certificate_request()
   * Fixed const correctness issues that have no impact on the ABI
   * x509parse_crt() now better handles PEM error situations
   * ssl_parse_certificate() now calls x509parse_crt_der() directly
     instead of the x509parse_crt() wrapper that can also parse PEM
	 certificates
   * x509parse_crtpath() is now reentrant and uses more portable stat()
   * Fixed bignum.c and bn_mul.h to support Thumb2 and LLVM compiler
   * Fixed values for 2-key Triple DES in cipher layer
   * ssl_write_certificate_request() can handle empty ca_chain

Security
   * A possible DoS during the SSL Handshake, due to faulty parsing of
     PEM-encoded certificates has been fixed (found by Jack Lloyd)

= Version 1.2.7 released 2013-04-13
Features
   * Ability to specify allowed ciphersuites based on the protocol version.

Changes
   * Default Blowfish keysize is now 128-bits
   * Test suites made smaller to accommodate Raspberry Pi

Bugfix
   * Fix for MPI assembly for ARM
   * GCM adapted to support sizes > 2^29

= Version 1.2.6 released 2013-03-11
Bugfix
   * Fixed memory leak in ssl_free() and ssl_reset() for active session
   * Corrected GCM counter incrementation to use only 32-bits instead of
     128-bits (found by Yawning Angel)
   * Fixes for 64-bit compilation with MS Visual Studio
   * Fixed net_bind() for specified IP addresses on little endian systems
   * Fixed assembly code for ARM (Thumb and regular) for some compilers

Changes
   * Internally split up rsa_pkcs1_encrypt(), rsa_pkcs1_decrypt(),
     rsa_pkcs1_sign() and rsa_pkcs1_verify() to separate PKCS#1 v1.5 and
     PKCS#1 v2.1 functions
   * Added support for custom labels when using rsa_rsaes_oaep_encrypt()
     or rsa_rsaes_oaep_decrypt()
   * Re-added handling for SSLv2 Client Hello when the define
     POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is set
   * The SSL session cache module (ssl_cache) now also retains peer_cert
     information (not the entire chain)

Security
   * Removed further timing differences during SSL message decryption in
     ssl_decrypt_buf()
   * Removed timing differences due to bad padding from
     rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5
     operations

= Version 1.2.5 released 2013-02-02
Changes
   * Allow enabling of dummy error_strerror() to support some use-cases
   * Debug messages about padding errors during SSL message decryption are
     disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL 
   * Sending of security-relevant alert messages that do not break
     interoperability can be switched on/off with the flag
     POLARSSL_SSL_ALL_ALERT_MESSAGES

Security
   * Removed timing differences during SSL message decryption in
     ssl_decrypt_buf() due to badly formatted padding

= Version 1.2.4 released 2013-01-25
Changes
   * More advanced SSL ciphersuite representation and moved to more dynamic
     SSL core
   * Added ssl_handshake_step() to allow single stepping the handshake process

Bugfix
   * Memory leak when using RSA_PKCS_V21 operations fixed
   * Handle future version properly in ssl_write_certificate_request()
   * Correctly handle CertificateRequest message in client for <= TLS 1.1
     without DN list

= Version 1.2.3 released 2012-11-26
Bugfix
   * Server not always sending correct CertificateRequest message

= Version 1.2.2 released 2012-11-24
Changes
   * Added p_hw_data to ssl_context for context specific hardware acceleration
     data
   * During verify trust-CA is only checked for expiration and CRL presence  

Bugfixes
   * Fixed client authentication compatibility
   * Fixed dependency on POLARSSL_SHA4_C in SSL modules

= Version 1.2.1 released 2012-11-20
Changes
   * Depth that the certificate verify callback receives is now numbered
     bottom-up (Peer cert depth is 0)

Bugfixes
   * Fixes for MSVC6
   * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
   * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
     Pégourié-Gonnard)
   * Fixed possible segfault in mpi_shift_r() (found by Manuel
     Pégourié-Gonnard)
   * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1

= Version 1.2.0 released 2012-10-31
Features
   * Added support for NULL cipher (POLARSSL_CIPHER_NULL_CIPHER) and weak
     ciphersuites (POLARSSL_ENABLE_WEAK_CIPHERSUITES). They are disabled by
     default!
   * Added support for wildcard certificates
   * Added support for multi-domain certificates through the X509 Subject
     Alternative Name extension
   * Added preliminary ASN.1 buffer writing support
   * Added preliminary X509 Certificate Request writing support
   * Added key_app_writer example application
   * Added cert_req example application
   * Added base Galois Counter Mode (GCM) for AES
   * Added TLS 1.2 support (RFC 5246)
   * Added GCM suites to TLS 1.2 (RFC 5288)
   * Added commandline error code convertor (util/strerror)
   * Added support for Hardware Acceleration hooking in SSL/TLS
   * Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and
     example application (programs/ssl/o_p_test) (requires OpenSSL)
   * Added X509 CA Path support
   * Added Thumb assembly optimizations
   * Added DEFLATE compression support as per RFC3749 (requires zlib)
   * Added blowfish algorithm (Generic and cipher layer)
   * Added PKCS#5 PBKDF2 key derivation function
   * Added Secure Renegotiation (RFC 5746)
   * Added predefined DHM groups from RFC 5114
   * Added simple SSL session cache implementation
   * Added ServerName extension parsing (SNI) at server side
   * Added option to add minimum accepted SSL/TLS protocol version

Changes
   * Removed redundant POLARSSL_DEBUG_MSG define
   * AES code only check for Padlock once
   * Fixed const-correctness mpi_get_bit()
   * Documentation for mpi_lsb() and mpi_msb()
   * Moved out_msg to out_hdr + 32 to support hardware acceleration
   * Changed certificate verify behaviour to comply with RFC 6125 section 6.3
     to not match CN if subjectAltName extension is present (Closes ticket #56)
   * Cipher layer cipher_mode_t POLARSSL_MODE_CFB128 is renamed to
     POLARSSL_MODE_CFB, to also handle different block size CFB modes.
   * Removed handling for SSLv2 Client Hello (as per RFC 5246 recommendation)
   * Revamped session resumption handling
   * Generalized external private key implementation handling (like PKCS#11)
     in SSL/TLS
   * Revamped x509_verify() and the SSL f_vrfy callback implementations
   * Moved from unsigned long to fixed width uint32_t types throughout code
   * Renamed ciphersuites naming scheme to IANA reserved names

Bugfix
   * Fixed handling error in mpi_cmp_mpi() on longer B values (found by
     Hui Dong)
   * Fixed potential heap corruption in x509_name allocation
   * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)
   * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
     #52)
   * Handle encryption with private key and decryption with public key as per
   	 RFC 2313
   * Handle empty certificate subject names
   * Prevent reading over buffer boundaries on X509 certificate parsing
   * mpi_add_abs() now correctly handles adding short numbers to long numbers
     with carry rollover (found by Ruslan Yushchenko)
   * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob
   * Fixed MPI assembly for SPARC64 platform

Security
   * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi
     Vanderbeken)

= Version 1.1.8 released on 2013-10-01
Bugfix
   * Fixed potential memory leak when failing to resume a session
   * Fixed potential file descriptor leaks

Security
   * Potential buffer-overflow for ssl_read_record() (independently found by
     both TrustInSoft and Paul Brodeur of Leviathan Security Group)
   * Potential negative value misinterpretation in load_file()
   * Potential heap buffer overflow on large hostname setting

= Version 1.1.7 released on 2013-06-19
Changes
   * HAVEGE random generator disabled by default

Bugfix
   * x509parse_crt() now better handles PEM error situations
   * ssl_parse_certificate() now calls x509parse_crt_der() directly
     instead of the x509parse_crt() wrapper that can also parse PEM
	 certificates
   * Fixed values for 2-key Triple DES in cipher layer
   * ssl_write_certificate_request() can handle empty ca_chain

Security
   * A possible DoS during the SSL Handshake, due to faulty parsing of
     PEM-encoded certificates has been fixed (found by Jack Lloyd)

= Version 1.1.6 released on 2013-03-11
Bugfix
   * Fixed net_bind() for specified IP addresses on little endian systems

Changes
   * Allow enabling of dummy error_strerror() to support some use-cases
   * Debug messages about padding errors during SSL message decryption are
     disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL

Security
   * Removed timing differences during SSL message decryption in
     ssl_decrypt_buf()
   * Removed timing differences due to bad padding from
     rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5
     operations

= Version 1.1.5 released on 2013-01-16
Bugfix
   * Fixed MPI assembly for SPARC64 platform
   * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob
   * mpi_add_abs() now correctly handles adding short numbers to long numbers
     with carry rollover
   * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
   * Prevent reading over buffer boundaries on X509 certificate parsing
   * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
     #52)
   * Fixed possible segfault in mpi_shift_r() (found by Manuel
     Pégourié-Gonnard)
   * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
     Pégourié-Gonnard)
   * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1
   * Memory leak when using RSA_PKCS_V21 operations fixed
   * Handle encryption with private key and decryption with public key as per
     RFC 2313
   * Fixes for MSVC6

Security
   * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi
     Vanderbeken)

= Version 1.1.4 released on 2012-05-31
Bugfix
   * Correctly handle empty SSL/TLS packets (Found by James Yonan)
   * Fixed potential heap corruption in x509_name allocation
   * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)

= Version 1.1.3 released on 2012-04-29
Bugfix
   * Fixed random MPI generation to not generate more size than requested.

= Version 1.1.2 released on 2012-04-26
Bugfix
   * Fixed handling error in mpi_cmp_mpi() on longer B values (found by
     Hui Dong)

Security
   * Fixed potential memory corruption on miscrafted client messages (found by
     Frama-C team at CEA LIST)
   * Fixed generation of DHM parameters to correct length (found by Ruslan
     Yushchenko)

= Version 1.1.1 released on 2012-01-23
Bugfix
   * Check for failed malloc() in ssl_set_hostname() and x509_get_entries()
     (Closes ticket #47, found by Hugo Leisink)
   * Fixed issues with Intel compiler on 64-bit systems (Closes ticket #50)
   * Fixed multiple compiler warnings for VS6 and armcc
   * Fixed bug in CTR_CRBG selftest

= Version 1.1.0 released on 2011-12-22
Features
   * Added ssl_session_reset() to allow better multi-connection pools of
     SSL contexts without needing to set all non-connection-specific
	 data and pointers again. Adapted ssl_server to use this functionality.
   * Added ssl_set_max_version() to allow clients to offer a lower maximum
     supported version to a server to help buggy server implementations.
	 (Closes ticket #36)
   * Added cipher_get_cipher_mode() and cipher_get_cipher_operation()
     introspection functions (Closes ticket #40)
   * Added CTR_DRBG based on AES-256-CTR (NIST SP 800-90) random generator
   * Added a generic entropy accumulator that provides support for adding
     custom entropy sources and added some generic and platform dependent
	 entropy sources

Changes
   * Documentation for AES and Camellia in modes CTR and CFB128 clarified.
   * Fixed rsa_encrypt and rsa_decrypt examples to use public key for
     encryption and private key for decryption. (Closes ticket #34)
   * Inceased maximum size of ASN1 length reads to 32-bits.
   * Added an EXPLICIT tag number parameter to x509_get_ext()
   * Added a separate CRL entry extension parsing function
   * Separated the ASN.1 parsing code from the X.509 specific parsing code.
     So now there is a module that is controlled with POLARSSL_ASN1_PARSE_C.
   * Changed the defined key-length of DES ciphers in cipher.h to include the
     parity bits, to prevent mistakes in copying data. (Closes ticket #33)
   * Loads of minimal changes to better support WINCE as a build target
     (Credits go to Marco Lizza)
   * Added POLARSSL_MPI_WINDOW_SIZE definition to allow easier time to memory
     trade-off
   * Introduced POLARSSL_MPI_MAX_SIZE and POLARSSL_MPI_MAX_BITS for MPI size
     management (Closes ticket #44)
   * Changed the used random function pointer to more flexible format. Renamed
     havege_rand() to havege_random() to prevent mistakes. Lots of changes as
     a consequence in library code and programs
   * Moved all examples programs to use the new entropy and CTR_DRBG
   * Added permissive certificate parsing to x509parse_crt() and
     x509parse_crtfile(). With permissive parsing the parsing does not stop on
     encountering a parse-error. Beware that the meaning of return values has
     changed!
   * All error codes are now negative. Even on mermory failures and IO errors.

Bugfix
   * Fixed faulty HMAC-MD2 implementation. Found by dibac. (Closes
     ticket #37)
   * Fixed a bug where the CRL parser expected an EXPLICIT ASN.1 tag
     before version numbers
   * Allowed X509 key usage parsing to accept 4 byte values instead of the
     standard 1 byte version sometimes used by Microsoft. (Closes ticket #38)
   * Fixed incorrect behaviour in case of RSASSA-PSS with a salt length
     smaller than the hash length. (Closes ticket #41)
   * If certificate serial is longer than 32 octets, serial number is now
     appended with '....' after first 28 octets
   * Improved build support for s390x and sparc64 in bignum.h
   * Fixed MS Visual C++ name clash with int64 in sha4.h
   * Corrected removal of leading "00:" in printing serial numbers in
     certificates and CRLs

= Version 1.0.0 released on 2011-07-27
Features
   * Expanded cipher layer with support for CFB128 and CTR mode
   * Added rsa_encrypt and rsa_decrypt simple example programs.

Changes
   * The generic cipher and message digest layer now have normal error
     codes instead of integers

Bugfix
   * Undid faulty bug fix in ssl_write() when flushing old data (Ticket
     #18)

= Version 0.99-pre5 released on 2011-05-26
Features
   * Added additional Cipher Block Modes to symmetric ciphers
     (AES CTR, Camellia CTR, XTEA CBC) including the option to
     enable and disable individual modes when needed
   * Functions requiring File System functions can now be disabled
     by undefining POLARSSL_FS_IO
   * A error_strerror function() has been added to translate between
     error codes and their description.
   * Added mpi_get_bit() and mpi_set_bit() individual bit setter/getter
     functions.
   * Added ssl_mail_client and ssl_fork_server as example programs.

Changes
   * Major argument / variable rewrite. Introduced use of size_t
     instead of int for buffer lengths and loop variables for
     better unsigned / signed use. Renamed internal bigint types
     t_int and t_dbl to t_uint and t_udbl in the process
   * mpi_init() and mpi_free() now only accept a single MPI
     argument and do not accept variable argument lists anymore.
   * The error codes have been remapped and combining error codes
     is now done with a PLUS instead of an OR as error codes
     used are negative.
   * Changed behaviour of net_read(), ssl_fetch_input() and ssl_recv().
     net_recv() now returns 0 on EOF instead of
     POLARSSL_ERR_NET_CONN_RESET. ssl_fetch_input() returns
     POLARSSL_ERR_SSL_CONN_EOF on an EOF from its f_recv() function.
     ssl_read() returns 0 if a POLARSSL_ERR_SSL_CONN_EOF is received
     after the handshake.
   * Network functions now return POLARSSL_ERR_NET_WANT_READ or
     POLARSSL_ERR_NET_WANT_WRITE instead of the ambiguous
     POLARSSL_ERR_NET_TRY_AGAIN

= Version 0.99-pre4 released on 2011-04-01
Features
   * Added support for PKCS#1 v2.1 encoding and thus support
     for the RSAES-OAEP and RSASSA-PSS operations.
   * Reading of Public Key files incorporated into default x509
     functionality as well.
   * Added mpi_fill_random() for centralized filling of big numbers
     with random data (Fixed ticket #10)

Changes
   * Debug print of MPI now removes leading zero octets and 
     displays actual bit size of the value.
   * x509parse_key() (and as a consequence x509parse_keyfile()) 
     does not zeroize memory in advance anymore. Use rsa_init()
     before parsing a key or keyfile!

Bugfix
   * Debug output of MPI's now the same independent of underlying
     platform (32-bit / 64-bit) (Fixes ticket #19, found by Mads
     Kiilerich and Mihai Militaru)
   * Fixed bug in ssl_write() when flushing old data (Fixed ticket
     #18, found by Nikolay Epifanov)
   * Fixed proper handling of RSASSA-PSS verification with variable
     length salt lengths

= Version 0.99-pre3 released on 2011-02-28
This release replaces version 0.99-pre2 which had possible copyright issues.
Features
   * Parsing PEM private keys encrypted with DES and AES
     are now supported as well (Fixes ticket #5)
   * Added crl_app program to allow easy reading and
     printing of X509 CRLs from file

Changes
   * Parsing of PEM files moved to separate module (Fixes 
     ticket #13). Also possible to remove PEM support for
     systems only using DER encoding

Bugfixes
   * Corrected parsing of UTCTime dates before 1990 and
     after 1950
   * Support more exotic OID's when parsing certificates
   	 (found by Mads Kiilerich)
   * Support more exotic name representations when parsing
     certificates (found by Mads Kiilerich)
   * Replaced the expired test certificates
   * Do not bail out if no client certificate specified. Try
     to negotiate anonymous connection (Fixes ticket #12,
     found by Boris Krasnovskiy)

Security fixes
   * Fixed a possible Man-in-the-Middle attack on the
     Diffie Hellman key exchange (thanks to Larry Highsmith,
     Subreption LLC)

= Version 0.99-pre1 released on 2011-01-30
Features
Note: Most of these features have been donated by Fox-IT
   * Added Doxygen source code documentation parts
   * Added reading of DHM context from memory and file
   * Improved X509 certificate parsing to include extended
     certificate fields, including Key Usage
   * Improved certificate verification and verification
     against the available CRLs
   * Detection for DES weak keys and parity bits added
   * Improvements to support integration in other
     applications:
       + Added generic message digest and cipher wrapper
       + Improved information about current capabilities,
         status, objects and configuration
       + Added verification callback on certificate chain
         verification to allow external blacklisting
	   + Additional example programs to show usage
   * Added support for PKCS#11 through the use of the
     libpkcs11-helper library

Changes
   * x509parse_time_expired() checks time in addition to
     the existing date check
   * The ciphers member of ssl_context and the cipher member
     of ssl_session have been renamed to ciphersuites and
     ciphersuite respectively. This clarifies the difference
     with the generic cipher layer and is better naming
     altogether

= Version 0.14.0 released on 2010-08-16
Features
   * Added support for SSL_EDH_RSA_AES_128_SHA and
     SSL_EDH_RSA_CAMELLIA_128_SHA ciphersuites
   * Added compile-time and run-time version information
   * Expanded ssl_client2 arguments for more flexibility
   * Added support for TLS v1.1

Changes
   * Made Makefile cleaner
   * Removed dependency on rand() in rsa_pkcs1_encrypt().
     Now using random fuction provided to function and
     changed the prototype of rsa_pkcs1_encrypt(),
     rsa_init() and rsa_gen_key().
   * Some SSL defines were renamed in order to avoid
     future confusion

Bug fixes
   * Fixed CMake out of source build for tests (found by
     kkert)
   * rsa_check_private() now supports PKCS1v2 keys as well
   * Fixed deadlock in rsa_pkcs1_encrypt() on failing random
     generator

= Version 0.13.1 released on 2010-03-24
Bug fixes
   * Fixed Makefile in library that was mistakenly merged
   * Added missing const string fixes

= Version 0.13.0 released on 2010-03-21
Features
   * Added option parsing for host and port selection to
     ssl_client2
   * Added support for GeneralizedTime in X509 parsing
   * Added cert_app program to allow easy reading and
     printing of X509 certificates from file or SSL
     connection.

Changes
   * Added const correctness for main code base
   * X509 signature algorithm determination is now
     in a function to allow easy future expansion
   * Changed symmetric cipher functions to
     identical interface (returning int result values)
   * Changed ARC4 to use separate input/output buffer
   * Added reset function for HMAC context as speed-up
     for specific use-cases

Bug fixes
   * Fixed bug resulting in failure to send the last
     certificate in the chain in ssl_write_certificate() and
     ssl_write_certificate_request() (found by fatbob)
   * Added small fixes for compiler warnings on a Mac
     (found by Frank de Brabander)
   * Fixed algorithmic bug in mpi_is_prime() (found by
     Smbat Tonoyan)

= Version 0.12.1 released on 2009-10-04
Changes
   * Coverage test definitions now support 'depends_on'
     tagging system.
   * Tests requiring specific hashing algorithms now honor
     the defines.

Bug fixes
   * Changed typo in #ifdef in x509parse.c (found
     by Eduardo)

= Version 0.12.0 released on 2009-07-28
Features
   * Added CMake makefiles as alternative to regular Makefiles.
   * Added preliminary Code Coverage tests for AES, ARC4,
     Base64, MPI, SHA-family, MD-family, HMAC-SHA-family,
     Camellia, DES, 3-DES, RSA PKCS#1, XTEA, Diffie-Hellman
     and X509parse.

Changes
   * Error codes are not (necessarily) negative. Keep
     this is mind when checking for errors.
   * RSA_RAW renamed to SIG_RSA_RAW for consistency.
   * Fixed typo in name of POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE.
   * Changed interface for AES and Camellia setkey functions
     to indicate invalid key lengths.

Bug fixes
   * Fixed include location of endian.h on FreeBSD (found by
     Gabriel)
   * Fixed include location of endian.h and name clash on
     Apples (found by Martin van Hensbergen)
   * Fixed HMAC-MD2 by modifying md2_starts(), so that the
     required HMAC ipad and opad variables are not cleared.
     (found by code coverage tests)
   * Prevented use of long long in bignum if 
     POLARSSL_HAVE_LONGLONG not defined (found by Giles
     Bathgate).
   * Fixed incorrect handling of negative strings in
     mpi_read_string() (found by code coverage tests).
   * Fixed segfault on handling empty rsa_context in
     rsa_check_pubkey() and rsa_check_privkey() (found by
     code coverage tests).
   * Fixed incorrect handling of one single negative input
     value in mpi_add_abs() (found by code coverage tests).
   * Fixed incorrect handling of negative first input
     value in mpi_sub_abs() (found by code coverage tests).
   * Fixed incorrect handling of negative first input
     value in mpi_mod_mpi() and mpi_mod_int(). Resulting
     change also affects mpi_write_string() (found by code
     coverage tests).
   * Corrected is_prime() results for 0, 1 and 2 (found by
     code coverage tests).
   * Fixed Camellia and XTEA for 64-bit Windows systems.

= Version 0.11.1 released on 2009-05-17
   * Fixed missing functionality for SHA-224, SHA-256, SHA384,
     SHA-512 in rsa_pkcs1_sign()

= Version 0.11.0 released on 2009-05-03
   * Fixed a bug in mpi_gcd() so that it also works when both
     input numbers are even and added testcases to check
     (found by Pierre Habouzit).
   * Added support for SHA-224, SHA-256, SHA-384 and SHA-512
     one way hash functions with the PKCS#1 v1.5 signing and
     verification.
   * Fixed minor bug regarding mpi_gcd located within the
     POLARSSL_GENPRIME block.
   * Fixed minor memory leak in x509parse_crt() and added better
     handling of 'full' certificate chains (found by Mathias
     Olsson).
   * Centralized file opening and reading for x509 files into
     load_file()
   * Made definition of net_htons() endian-clean for big endian
     systems (Found by Gernot).
   * Undefining POLARSSL_HAVE_ASM now also handles prevents asm in
     padlock and timing code. 
   * Fixed an off-by-one buffer allocation in ssl_set_hostname()
     responsible for crashes and unwanted behaviour.
   * Added support for Certificate Revocation List (CRL) parsing.
   * Added support for CRL revocation to x509parse_verify() and
     SSL/TLS code.
   * Fixed compatibility of XTEA and Camellia on a 64-bit system
     (found by Felix von Leitner).

= Version 0.10.0 released on 2009-01-12
   * Migrated XySSL to PolarSSL
   * Added XTEA symmetric cipher
   * Added Camellia symmetric cipher
   * Added support for ciphersuites: SSL_RSA_CAMELLIA_128_SHA,
     SSL_RSA_CAMELLIA_256_SHA and SSL_EDH_RSA_CAMELLIA_256_SHA
   * Fixed dangerous bug that can cause a heap overflow in
     rsa_pkcs1_decrypt (found by Christophe Devine)

================================================================
XySSL ChangeLog

= Version 0.9 released on 2008-03-16

    * Added support for ciphersuite: SSL_RSA_AES_128_SHA
    * Enabled support for large files by default in aescrypt2.c
    * Preliminary openssl wrapper contributed by David Barrett
    * Fixed a bug in ssl_write() that caused the same payload to
      be sent twice in non-blocking mode when send returns EAGAIN
    * Fixed ssl_parse_client_hello(): session id and challenge must
      not be swapped in the SSLv2 ClientHello (found by Greg Robson)
    * Added user-defined callback debug function (Krystian Kolodziej)
    * Before freeing a certificate, properly zero out all cert. data
    * Fixed the "mode" parameter so that encryption/decryption are
      not swapped on PadLock; also fixed compilation on older versions
      of gcc (bug reported by David Barrett)
    * Correctly handle the case in padlock_xcryptcbc() when input or
      ouput data is non-aligned by falling back to the software
      implementation, as VIA Nehemiah cannot handle non-aligned buffers
    * Fixed a memory leak in x509parse_crt() which was reported by Greg
      Robson-Garth; some x509write.c fixes by Pascal Vizeli, thanks to
      Matthew Page who reported several bugs
    * Fixed x509_get_ext() to accept some rare certificates which have
      an INTEGER instead of a BOOLEAN for BasicConstraints::cA.
    * Added support on the client side for the TLS "hostname" extension
      (patch contributed by David Patino)
    * Make x509parse_verify() return BADCERT_CN_MISMATCH when an empty
      string is passed as the CN (bug reported by spoofy)
    * Added an option to enable/disable the BN assembly code
    * Updated rsa_check_privkey() to verify that (D*E) = 1 % (P-1)*(Q-1)
    * Disabled obsolete hash functions by default (MD2, MD4); updated
      selftest and benchmark to not test ciphers that have been disabled
    * Updated x509parse_cert_info() to correctly display byte 0 of the
      serial number, setup correct server port in the ssl client example
    * Fixed a critical denial-of-service with X.509 cert. verification:
      peer may cause xyssl to loop indefinitely by sending a certificate
      for which the RSA signature check fails (bug reported by Benoit)
    * Added test vectors for: AES-CBC, AES-CFB, DES-CBC and 3DES-CBC,
      HMAC-MD5, HMAC-SHA1, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512
    * Fixed HMAC-SHA-384 and HMAC-SHA-512 (thanks to Josh Sinykin)
    * Modified ssl_parse_client_key_exchange() to protect against
      Daniel Bleichenbacher attack on PKCS#1 v1.5 padding, as well
      as the Klima-Pokorny-Rosa extension of Bleichenbacher's attack
    * Updated rsa_gen_key() so that ctx->N is always nbits in size
    * Fixed assembly PPC compilation errors on Mac OS X, thanks to
      David Barrett and Dusan Semen

= Version 0.8 released on 2007-10-20

    * Modified the HMAC functions to handle keys larger
      than 64 bytes, thanks to Stephane Desneux and gary ng
    * Fixed ssl_read_record() to properly update the handshake
      message digests, which fixes IE6/IE7 client authentication
    * Cleaned up the XYSSL* #defines, suggested by Azriel Fasten
    * Fixed net_recv(), thanks to Lorenz Schori and Egon Kocjan
    * Added user-defined callbacks for handling I/O and sessions
    * Added lots of debugging output in the SSL/TLS functions
    * Added preliminary X.509 cert. writing by Pascal Vizeli
    * Added preliminary support for the VIA PadLock routines
    * Added AES-CFB mode of operation, contributed by chmike
    * Added an SSL/TLS stress testing program (ssl_test.c)
    * Updated the RSA PKCS#1 code to allow choosing between
      RSA_PUBLIC and RSA_PRIVATE, as suggested by David Barrett
    * Updated ssl_read() to skip 0-length records from OpenSSL
    * Fixed the make install target to comply with *BSD make
    * Fixed a bug in mpi_read_binary() on 64-bit platforms
    * mpi_is_prime() speedups, thanks to Kevin McLaughlin
    * Fixed a long standing memory leak in mpi_is_prime()
    * Replaced realloc with malloc in mpi_grow(), and set
      the sign of zero as positive in mpi_init() (reported
      by Jonathan M. McCune)

= Version 0.7 released on 2007-07-07

    * Added support for the MicroBlaze soft-core processor
    * Fixed a bug in ssl_tls.c which sometimes prevented SSL
      connections from being established with non-blocking I/O
    * Fixed a couple bugs in the VS6 and UNIX Makefiles
    * Fixed the "PIC register ebx clobbered in asm" bug
    * Added HMAC starts/update/finish support functions
    * Added the SHA-224, SHA-384 and SHA-512 hash functions
    * Fixed the net_set_*block routines, thanks to Andreas
    * Added a few demonstration programs: md5sum, sha1sum,
      dh_client, dh_server, rsa_genkey, rsa_sign, rsa_verify
    * Added new bignum import and export helper functions
    * Rewrote README.txt in program/ssl/ca to better explain
      how to create a test PKI

= Version 0.6 released on 2007-04-01

    * Ciphers used in SSL/TLS can now be disabled at compile
      time, to reduce the memory footprint on embedded systems
    * Added multiply assembly code for the TriCore and modified
      havege_struct for this processor, thanks to David Patiño
    * Added multiply assembly code for 64-bit PowerPCs,
      thanks to Peking University and the OSU Open Source Lab
    * Added experimental support of Quantum Cryptography
    * Added support for autoconf, contributed by Arnaud Cornet
    * Fixed "long long" compilation issues on IA-64 and PPC64
    * Fixed a bug introduced in xyssl-0.5/timing.c: hardclock
      was not being correctly defined on ARM and MIPS

= Version 0.5 released on 2007-03-01

    * Added multiply assembly code for SPARC and Alpha
    * Added (beta) support for non-blocking I/O operations
    * Implemented session resuming and client authentication
    * Fixed some portability issues on WinCE, MINIX 3, Plan9
      (thanks to Benjamin Newman), HP-UX, FreeBSD and Solaris
    * Improved the performance of the EDH key exchange
    * Fixed a bug that caused valid packets with a payload
      size of 16384 bytes to be rejected

= Version 0.4 released on 2007-02-01

    * Added support for Ephemeral Diffie-Hellman key exchange
    * Added multiply asm code for SSE2, ARM, PPC, MIPS and M68K
    * Various improvement to the modular exponentiation code
    * Rewrote the headers to generate the API docs with doxygen
    * Fixed a bug in ssl_encrypt_buf (incorrect padding was
      generated) and in ssl_parse_client_hello (max. client
      version was not properly set), thanks to Didier Rebeix
    * Fixed another bug in ssl_parse_client_hello: clients with
      cipherlists larger than 96 bytes were incorrectly rejected
    * Fixed a couple memory leak in x509_read.c

= Version 0.3 released on 2007-01-01

    * Added server-side SSLv3 and TLSv1.0 support
    * Multiple fixes to enhance the compatibility with g++,
      thanks to Xosé Antón Otero Ferreira
    * Fixed a bug in the CBC code, thanks to dowst; also,
      the bignum code is no longer dependent on long long
    * Updated rsa_pkcs1_sign to handle arbitrary large inputs
    * Updated timing.c for improved compatibility with i386
      and 486 processors, thanks to Arnaud Cornet

= Version 0.2 released on 2006-12-01

    * Updated timing.c to support ARM and MIPS arch
    * Updated the MPI code to support 8086 on MSVC 1.5
    * Added the copyright notice at the top of havege.h
    * Fixed a bug in sha2_hmac, thanks to newsoft/Wenfang Zhang
    * Fixed a bug reported by Adrian Rüegsegger in x509_read_key
    * Fixed a bug reported by Torsten Lauter in ssl_read_record
    * Fixed a bug in rsa_check_privkey that would wrongly cause
      valid RSA keys to be dismissed (thanks to oldwolf)
    * Fixed a bug in mpi_is_prime that caused some primes to fail
      the Miller-Rabin primality test

    I'd also like to thank Younès Hafri for the CRUX linux port,
    Khalil Petit who added XySSL into pkgsrc and Arnaud Cornet
    who maintains the Debian package :-)

= Version 0.1 released on 2006-11-01

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