wolfSSL (formerly CyaSSL) is a small, fast, portable implementation of TLS/SSL for embedded devices to the cloud. wolfSSL supports up to TLS 1.3!

David Garske 6e9d956a49 Merge pull request #6021 from kareem-wolfssl/zd15544 13 hours ago
.github 10529e6199 Add `user_settings.h` template for wolfTPM 1 day ago
Docker 8ecd906c23 Update open wrt test (#6010) 2 days ago
IDE 24f89337f6 Espressif examples default partition params: large app 2 weeks ago
IPP 55a56cac05 Release 3.7.0 7 years ago
certs b3e99348cd Purge the AES variant of Dilithium 1 month ago
cmake d7cbd8cd17 Improve logic for enabling system CA certs on Apple devices. 2 months ago
ctaocrypt 9dcc48c8f7 update copyright to 2023 4 weeks ago
cyassl 9dcc48c8f7 update copyright to 2023 4 weeks ago
doc 9be01633d1 Move the wolfSSL Configuration section higher in QUIC.md because it is the first step. 1 week ago
examples 10529e6199 Add `user_settings.h` template for wolfTPM 1 day ago
lib 6b88eb05b1 1.8.8 init 12 years ago
linuxkm 022d0e7c89 linuxkm/module_exports.c.template: include hpke.h if HAVE_HPKE. 2 days ago
m4 5e6005a1a3 m4/ax_atomic.m4: fix conflicting macro definition for HAVE_C___ATOMIC. 3 days ago
mcapi 9dcc48c8f7 update copyright to 2023 4 weeks ago
mplabx 9dcc48c8f7 update copyright to 2023 4 weeks ago
mqx 8f121e7752 file modes: clear inappropriate executable bits. 1 year ago
rpm 9a7ff8773b add --with-libsuffix support, append suffix to library artifact name 1 month ago
scripts 023db01aca * Fixed some build configuration variations. 3 weeks ago
src 53dfcd00e2 Ref count: change to use wolfSSL_Ref 5 days ago
sslSniffer 9dcc48c8f7 update copyright to 2023 4 weeks ago
support 0b4f34d62a typographic cleanup: fix whitespace, remove unneeded UTF-8, convert C++ comment constructs to C. 1 year ago
tests c70ca25282 Fix building NO_ASN_TIME with cert gen and OpenSSL Extra enabled. 16 hours ago
testsuite 9dcc48c8f7 update copyright to 2023 4 weeks ago
tirtos ea5e814dfa Fix tirtos build 3 months ago
wolfcrypt 6e9d956a49 Merge pull request #6021 from kareem-wolfssl/zd15544 13 hours ago
wolfssl c70ca25282 Fix building NO_ASN_TIME with cert gen and OpenSSL Extra enabled. 16 hours ago
wrapper ea80e9e0ea Add documentation for the CSharp wrapper. 1 week ago
zephyr 9dcc48c8f7 update copyright to 2023 4 weeks ago
.gitignore ef63a5287a Ignore old cmake, VisualGDB working & Espressif sdkconfig files 1 month ago
stamp-h.in 5d49bf7cb0 Brian Aker commits plus some minor changes like AM_CFLAGS getting AC_SUBST and --enable-xxx #ifdef to new header layout 11 years ago
CMakeLists.txt 9f7e82a081 Add WOLFSSL_DH_CONST option to Cmake 1 week ago
COPYING be65f5d518 update FSF address, wolfSSL copyright 8 years ago
ChangeLog.md cca63a465d prepare for release 5.5.4 1 month ago
INSTALL 0bfa5c9836 Purge NTRU and SABER. Not going to be standardized. 2 months ago
LICENSING 970391319b Add or later verbage to LICENSING and sync header license versions 2 years ago
LPCExpresso.cproject 84be329ffb remove swig wrapper, now that we have dedicated Java and Python wrappers 1 year ago
LPCExpresso.project a48981c3c6 Chacha20 ARM optimization 3 years ago
Makefile.am c3a5698799 configure.ac/Makefile.am: 2 days ago
README 50aeb2f79e add quality of release statement 1 month ago
README.md 50aeb2f79e add quality of release statement 1 month ago
SCRIPTS-LIST 84be329ffb remove swig wrapper, now that we have dedicated Java and Python wrappers 1 year ago
Vagrantfile d76d74d6c5 updates Linux deps on README 6 years ago
async-check.sh abfc788389 script cleanup: use #!/bin/bash on all scripts that use "echo -e" (/bin/sh is sometimes a non-Bourne/non-POSIX shell, e.g. dash/ash, with no support for "echo -e"); fix whitespace. 10 months ago
autogen.sh abfc788389 script cleanup: use #!/bin/bash on all scripts that use "echo -e" (/bin/sh is sometimes a non-Bourne/non-POSIX shell, e.g. dash/ash, with no support for "echo -e"); fix whitespace. 10 months ago
commit-tests.sh abfc788389 script cleanup: use #!/bin/bash on all scripts that use "echo -e" (/bin/sh is sometimes a non-Bourne/non-POSIX shell, e.g. dash/ash, with no support for "echo -e"); fix whitespace. 10 months ago
configure.ac f14c27f644 Fix SE050 RSA public key loading and RSA/ECC SE050 usage from TLS with WOLF_PRIVATE_KEY_ID 18 hours ago
fips-check.sh a2b48aac53 Update v5 checkout for sha256_asm and sha512_asm 3 months ago
fips-hash.sh ba9fd89314 Script Portability 2 years ago
gencertbuf.pl b3e99348cd Purge the AES variant of Dilithium 1 month ago
input 696169634e check return value of wolfSSL_set_fd 6 years ago
pre-commit.sh abfc788389 script cleanup: use #!/bin/bash on all scripts that use "echo -e" (/bin/sh is sometimes a non-Bourne/non-POSIX shell, e.g. dash/ash, with no support for "echo -e"); fix whitespace. 10 months ago
pre-push.sh abfc788389 script cleanup: use #!/bin/bash on all scripts that use "echo -e" (/bin/sh is sometimes a non-Bourne/non-POSIX shell, e.g. dash/ash, with no support for "echo -e"); fix whitespace. 10 months ago
pull_to_vagrant.sh 21d70636dc Merge branch csr into 'master' 7 years ago
quit 5d49bf7cb0 Brian Aker commits plus some minor changes like AM_CFLAGS getting AC_SUBST and --enable-xxx #ifdef to new header layout 11 years ago
resource.h 0b4f34d62a typographic cleanup: fix whitespace, remove unneeded UTF-8, convert C++ comment constructs to C. 1 year ago
stamp-h.in 5d49bf7cb0 Brian Aker commits plus some minor changes like AM_CFLAGS getting AC_SUBST and --enable-xxx #ifdef to new header layout 11 years ago
valgrind-bash.supp 3444b115ba Fix valgrind check to ignore bash leak 2 years ago
valgrind-error.sh 3444b115ba Fix valgrind check to ignore bash leak 2 years ago
wnr-example.conf 3449990374 add example netRandom config file 6 years ago
wolfssl.rc cca63a465d prepare for release 5.5.4 1 month ago
wolfssl.vcproj cfbd061625 add initial support for ConnectionID DTLS extension 5 months ago
wolfssl.vcxproj cfbd061625 add initial support for ConnectionID DTLS extension 5 months ago
wolfssl64.sln b91e48d770 Add snifftest vcxproj file and documentation 3 months ago

README

*** Description ***

The wolfSSL embedded SSL library (formerly CyaSSL) is a lightweight SSL/TLS
library written in ANSI C and targeted for embedded, RTOS, and
resource-constrained environments - primarily because of its small size, speed,
and feature set. It is commonly used in standard operating environments as well
because of its royalty-free pricing and excellent cross platform support.
wolfSSL supports industry standards up to the current TLS 1.3 and DTLS 1.2
levels, is up to 20 times smaller than OpenSSL, and offers progressive ciphers
such as ChaCha20, Curve25519, and Blake2b. User benchmarking and feedback
reports dramatically better performance when using wolfSSL over OpenSSL.

wolfSSL is powered by the wolfCrypt library. Two versions of the wolfCrypt
cryptography library have been FIPS 140-2 validated (Certificate #2425 and
certificate #3389). For additional information, visit the wolfCrypt FIPS FAQ
(https://www.wolfssl.com/license/fips/) or contact fips@wolfssl.com

*** Why choose wolfSSL? ***

There are many reasons to choose wolfSSL as your embedded SSL solution. Some of
the top reasons include size (typical footprint sizes range from 20-100 kB),
support for the newest standards (SSL 3.0, TLS 1.0, TLS 1.1, TLS 1.2, TLS 1.3,
DTLS 1.0, and DTLS 1.2), current and progressive cipher support (including
stream ciphers), multi-platform, royalty free, and an OpenSSL compatibility API
to ease porting into existing applications which have previously used the
OpenSSL package. For a complete feature list, see chapter 4 of the wolfSSL
manual. (https://www.wolfssl.com/docs/wolfssl-manual/ch4/)

*** Notes, Please read ***

Note 1)
wolfSSL as of 3.6.6 no longer enables SSLv3 by default. wolfSSL also no longer
supports static key cipher suites with PSK, RSA, or ECDH. This means if you
plan to use TLS cipher suites you must enable DH (DH is on by default), or
enable ECC (ECC is on by default), or you must enable static key cipher suites
with

WOLFSSL_STATIC_DH
WOLFSSL_STATIC_RSA
or
WOLFSSL_STATIC_PSK

though static key cipher suites are deprecated and will be removed from future
versions of TLS. They also lower your security by removing PFS.

When compiling ssl.c, wolfSSL will now issue a compiler error if no cipher
suites are available. You can remove this error by defining
WOLFSSL_ALLOW_NO_SUITES in the event that you desire that, i.e., you're not
using TLS cipher suites.

Note 2)
wolfSSL takes a different approach to certificate verification than OpenSSL
does. The default policy for the client is to verify the server, this means
that if you don't load CAs to verify the server you'll get a connect error,
no signer error to confirm failure (-188).

If you want to mimic OpenSSL behavior of having SSL_connect succeed even if
verifying the server fails and reducing security you can do this by calling:

wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0);

before calling wolfSSL_new();. Though it's not recommended.

Note 3)
The enum values SHA, SHA256, SHA384, SHA512 are no longer available when
wolfSSL is built with --enable-opensslextra (OPENSSL_EXTRA) or with the macro
NO_OLD_SHA_NAMES. These names get mapped to the OpenSSL API for a single call
hash function. Instead the name WC_SHA, WC_SHA256, WC_SHA384 and WC_SHA512
should be used for the enum name.

*** end Notes ***

# wolfSSL Release 5.5.4 (Dec 21, 2022)

Release 5.5.4 of wolfSSL embedded TLS has bug fixes and new features including:

Release 5.5.4 has been developed according to wolfSSL's development and QA process (see link below) and successfully passed the quality criteria.
https://www.wolfssl.com/about/wolfssl-software-development-process-quality-assurance

## New Feature Additions

* QUIC related changes for HAProxy integration and config option
* Support for Analog Devices MAXQ1080 and MAXQ1065
* Testing and build of wolfSSL with NuttX
* New software based entropy gatherer with configure option --enable-entropy-memuse
* NXP SE050 feature expansion and fixes, adding in RSA support and conditional compile of AES and CMAC
* Support for multi-threaded sniffer

## Improvements / Optimizations

### Benchmark and Tests
* Add alternate test case for unsupported static memory API when testing mutex allocations
* Additional unit test cases added for AES CCM 256-bit
* Initialize and free AES object with benchmarking AES-OFB
* Kyber with DTLS 1.3 tests added
* Tidy up Espressif ESP32 test and benchmark examples
* Rework to be able to run API tests individually and add display of time taken per test

### Build and Port Improvements
* Add check for 64-bit ABI on MIPS64 before declaring a 64-bit CPU
* Add support to detect SIZEOF_LONG in armclang and diab
* Added in a simple example working on Rx72n
* Update azsphere support to prevent compilation of file included inline
* --enable-brainpool configure option added and default to on when custom curves are also on
* Add RSA PSS salt defines to engine builds if not FIPS v2

### Post Quantum
* Remove kyber-90s and route all Kyber through wolfcrypt
* Purge older version of NTRU and SABER from wolfSSL

### SP Math
* Support static memory build with sp-math
* SP C, SP int: improve performance
* SP int: support mingw64 again
* SP int: enhancements to guess 64-bit type and check on NO_64BIT macro set before using long long
* SP int: check size required when using sp_int on stack
* SP: --enable-sp-asm now enables SP by default if not set
* SP: support aarch64 big endian

### DTLS
* Allow DTLS 1.3 to compile when FIPS is enabled
* Allow for stateless DTLS client hello parsing

### Misc.
* Easier detection of DRBG health when using Intel’s RDRAND by updating the structures status value
* Detection of duplicate known extensions with TLS
* PKCS#11 handle a user PIN that is a NULL_PTR, compile time check in finding keys, add initialization API
* Update max Cert Policy size based on RFC 5280
* Add Android CA certs path for wolfSSL_CTX_load_system_CA_certs()
* Improve logic for enabling system CA certs on Apple devices
* Stub functions to allow for cpuid public functions with non-intel builds
* Increase RNG_SECURITY_STRENGTH for FIPS
* Improvements in OpenSSL Compat ERR Queue handling
* Support ASN1/DER CRLs in LoadCertByIssuer
* Expose more ECC math functions and improve async shared secret
* Improvement for sniffer error messages
* Warning added that renegotiation in TLS 1.3 requires session ticket
* Adjustment for TLS 1.3 post auth support
* Rework DH API and improve PEM read/write

## Fixes

### Build Fixes
* Fix --enable-devcrypto build error for sys without u_int8_t type
* Fix casts in evp.c and build issue in ParseCRL
* Fixes for compatibility layer building with heap hint and OSSL callbacks
* fix compile error due to Werro=undef on gcc-4.8
* Fix mingw-w64 build issues on windows
* Xcode project fixes for different build settings
* Initialize variable causing failures with gcc-11 and gcc-12 with a unique wolfSSL build configuration
* Prevent WOLFSSL_NO_MALLOC from breaking RSA certificate verification
* Fixes for various tests that do not properly handle `WC_PENDING_E` with async. builds
* Fix for misc `HashObject` to be excluded for `WOLFCRYPT_ONLY`

### OCSP Fixes
* Correctly save next status with OCSP response verify
* When the OCSP responder returns an unknown exception, continue through to checking the CRL

### Math Fixes
* Fix for implicit conversion with 32-bit in SP math
* Fix for error checks when modulus is even with SP int build
* Fix for checking of err in _sp_exptmod_nct with SP int build
* ECC cofactor fix when checking scalar bits
* ARM32 ASM: don't use ldrd on user data
* SP int, fix when ECC specific size code included

### Port Fixes
* Fixes for STM32 PKA ECC (not 256-bit) and improvements for AES-GCM
* Fix for cryptocell signature verification with ECC
* Benchmark devid changes, CCM with SECO fix, set IV on AES import into SECO

### Compat. Layer Fixes
* Fix for handling DEFAULT:... cipher suite list
* Fix memory leak in wolfSSL_X509_NAME_ENTRY_get_object
* Set alt name type to V_ASN1_IA5STRING
* Update name hash functions wolfSSL_X509_subject_name_hash and wolfSSL_X509_issuer_name_hash to hash the canonical form of subject
* Fix wolfSSL_set_SSL_CTX() to be usable during handshake
* Fix X509_get1_ocsp to set num of elements in stack
* X509v3 EXT d2i: fix freeing of aia
* Fix to remove recreation of certificate with wolfSSL_PEM_write_bio_X509()
* Link newly created x509 store's certificate manager to self by default to assist with CRL verification
* Fix for compatibility `EC_KEY_new_by_curve_name` to not create a key if the curve is not found

### Misc.
* Free potential signer malloc in a fail case
* fix other name san parsing and add RID cert to test parsing
* WOLFSSL_OP_NO_TICKET fix for TLSv1.2
* fix ASN template parsing of X509 subject directory attribute
* Fix the wrong IV size with the cipher suite TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256
* Fix incorrect self signed error return when compiled with certreq and certgen.
* Fix wrong function name in debug comment with wolfSSL_X509_get_name_oneline()
* Fix for decryption after second handshake with async sniffer
* Allow session tickets to properly resume when using PQ KEMs
* Add sanity overflow check to DecodeAltNames input buffer access


For additional vulnerability information visit the vulnerability page at:
https://www.wolfssl.com/docs/security-vulnerabilities/

See INSTALL file for build instructions.
More info can be found on-line at: https://wolfssl.com/wolfSSL/Docs.html

*** Resources ***


[wolfSSL Website](https://www.wolfssl.com/)

[wolfSSL Wiki](https://github.com/wolfSSL/wolfssl/wiki)

[FIPS FAQ](https://wolfssl.com/license/fips)

[wolfSSL Documents](https://wolfssl.com/wolfSSL/Docs.html)

[wolfSSL Manual](https://wolfssl.com/wolfSSL/Docs-wolfssl-manual-toc.html)

[wolfSSL API Reference]
(https://wolfssl.com/wolfSSL/Docs-wolfssl-manual-17-wolfssl-api-reference.html)

[wolfCrypt API Reference]
(https://wolfssl.com/wolfSSL/Docs-wolfssl-manual-18-wolfcrypt-api-reference.html)

[TLS 1.3](https://www.wolfssl.com/docs/tls13/)

[wolfSSL Vulnerabilities]
(https://www.wolfssl.com/docs/security-vulnerabilities/)

Additional wolfSSL Examples](https://github.com/wolfssl/wolfssl-examples)