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!

Daniel Pouzzner 2f17b756b2 Merge pull request #7360 from rizlik/curl-ticket-nonce-malloc 6 hours ago
.github ad74fb79ac Merge pull request #7354 from JacobBarthelmeh/ocsp-test 6 hours ago
Docker f9b26d8c06 Merge pull request #7358 from bandi13/buildNewYoctoContainer 6 hours ago
IDE e5914effab prepare for release 5.7.0 1 week ago
RTOS b146830fe8 move the zephyr folder back to it's correct location 1 year ago
certs d4b1995a2c ASN.1 testing: add tests of bad DER encodings 6 days ago
cmake 3c6651e1e2 PlayStation compatibility 4 weeks ago
debian d532833af9 Fix residual typos found by codespell 6 months ago
doc 09de233fc0 Add dox for new API 1 month ago
examples d867405ffb Fix floating point comparison. 1 week ago
linuxkm 30366a9c03 Merge pull request #7293 from douzzer/20240301-linuxkm-leak-and-small-stack-fixes 3 weeks ago
m4 5e6005a1a3 m4/ax_atomic.m4: fix conflicting macro definition for HAVE_C___ATOMIC. 1 year ago
mcapi 52f91e4ab9 Fix residual typos found by codespell 8 months ago
mplabx 9dcc48c8f7 update copyright to 2023 1 year ago
mqx 4ff99a6780 Fix tab/space inconsistencies 8 months ago
rpm 86f9171050 Remove obsolete mkdir call. 3 months ago
scripts 9a08296fa0 Fix openssl client psk key so that psk actually works 1 month ago
src 85601311a2 rework library versioning 1 week ago
sslSniffer 15918d8ee6 First pass at TLS1.3 keylog file working 7 months ago
support e4b1e54235 configure or cmake sets LIBM variable if required, and write it in wolfssl.pc. 1 month ago
tests 3728cd3dc5 Kyber fixes: 1 week ago
testsuite b66a108e97 CRL Monitor Test Fix 2 months ago
tirtos ced8198737 Doc Fix: TI no longer maintains the documentation; we do. 10 months ago
wolfcrypt d4b1995a2c ASN.1 testing: add tests of bad DER encodings 6 days ago
wolfssl e8e3e9db43 Merge pull request #7285 from anhu/noMagic274 6 hours ago
wrapper 8794e3f2f6 Updated the Ada wrapper README.md file and removed mention of the c_tls_client_main.c and c_tls_server_main.c files. 7 months ago
zephyr 920aaebed7 zephyr samples: fix wolfssl_benchmark RSA. 2 months ago
.editorconfig 20d706aad8 Basic editor config to avoid some whitespace issues 9 months ago
.gitignore e40eb3c774 Update Arduino examples; add wolfcrypt breadcrumbs. 3 weeks ago
AUTHORS 6b88eb05b1 1.8.8 init 13 years ago
CMakeLists.txt 85601311a2 rework library versioning 1 week ago
COPYING be65f5d518 update FSF address, wolfSSL copyright 10 years ago
ChangeLog.md e80deece82 adjust ChangeLog text 1 week ago
INSTALL 34f349e510 Used codespell and fixed obvious typos. 4 months ago
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LPCExpresso.cproject 84be329ffb remove swig wrapper, now that we have dedicated Java and Python wrappers 2 years ago
LPCExpresso.project a48981c3c6 Chacha20 ARM optimization 4 years ago
Makefile.am 26c5c6f93c Add directory layout to readme. 4 weeks ago
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SCRIPTS-LIST 50752f5a2b Fix typos found by codespell 8 months ago
Vagrantfile d76d74d6c5 updates Linux deps on README 7 years ago
async-check.sh 971df19c5c Missing fix 6 months ago
autogen.sh f3761ed28e Since no one uses this, we should remove commit hooks 2 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. 2 years ago
configure.ac 91ab6cafe0 configure.ac: enable ticket_nonce_malloc when using enable-curl 5 days ago
fips-check.sh 41b70b8386 Giving up and reverting back to what it was. 2 months ago
fips-hash.sh ba9fd89314 Script Portability 3 years ago
gencertbuf.pl 7926ceb120 Updated Key gen to convert the keys located in /certs/statickeys to be used in buffers 9 months ago
input 696169634e check return value of wolfSSL_set_fd 8 years ago
pull_to_vagrant.sh 21d70636dc Merge branch csr into 'master' 8 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 12 years ago
resource.h 0b4f34d62a typographic cleanup: fix whitespace, remove unneeded UTF-8, convert C++ comment constructs to C. 2 years 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 12 years ago
valgrind-bash.supp 3444b115ba Fix valgrind check to ignore bash leak 3 years ago
valgrind-error.sh 3444b115ba Fix valgrind check to ignore bash leak 3 years ago
wnr-example.conf 3449990374 add example netRandom config file 8 years ago
wolfssl.rc e5914effab prepare for release 5.7.0 1 week ago
wolfssl.vcproj ab953c3141 Update VS project files 8 months ago
wolfssl.vcxproj db14914951 Fixes for building wolfSSL in Visual Studio. Adds missing files. Fix for type cast warnings. 3 months ago
wolfssl64.sln b91e48d770 Add snifftest vcxproj file and documentation 1 year 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 1.3
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, DTLS 1.2, and DTLS 1.3), 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 5.7.0 (Mar 20, 2024)

Release 5.7.0 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

NOTE: * --enable-heapmath is being deprecated and will be removed by end of 2024

NOTE: In future releases, --enable-des3 (which is disabled by default) will be insufficient in itself to enable DES3 in TLS cipher suites. A new option, --enable-des3-tls-suites, will need to be supplied in addition. This option should only be used in backward compatibility scenarios, as it is inherently insecure.

NOTE: This release switches the default ASN.1 parser to the new ASN template code. If the original ASN.1 code is preferred define `WOLFSSL_ASN_ORIGINAL` to use it. See PR #7199.


## Vulnerabilities
* [High] CVE-2024-0901 Potential denial of service and out of bounds read. Affects TLS 1.3 on the server side when accepting a connection from a malicious TLS 1.3 client. If using TLS 1.3 on the server side it is recommended to update the version of wolfSSL used. Fixed in this GitHub pull request https://github.com/wolfSSL/wolfssl/pull/7099


* [Med] CVE-2024-1545 Fault Injection vulnerability in RsaPrivateDecryption function that potentially allows an attacker that has access to the same system with a victims process to perform a Rowhammer fault injection. Thanks to Junkai Liang, Zhi Zhang, Xin Zhang, Qingni Shen for the report (Peking University, The University of Western Australia)."
Fixed in this GitHub pull request https://github.com/wolfSSL/wolfssl/pull/7167


* [Med] Fault injection attack with EdDSA signature operations. This affects ed25519 sign operations where the system could be susceptible to Rowhammer attacks. Thanks to Junkai Liang, Zhi Zhang, Xin Zhang, Qingni Shen for the report (Peking University, The University of Western Australia).
Fixed in this GitHub pull request https://github.com/wolfSSL/wolfssl/pull/7212


## New Feature Additions

* Added --enable-experimental configure flag to gate out features that are currently experimental. Now liboqs, kyber, lms, xmss, and dual-alg-certs require the --enable-experimental flag.

### POST QUANTUM SUPPORT ADDITIONS
* Experimental framework for using wolfSSL’s XMSS implementation (PR 7161)
* Experimental framework for using wolfSSL’s LMS implementation (PR 7283)
* Experimental wolfSSL Kyber implementation and assembly optimizations, enabled with --enable-experimental --enable-kyber (PR 7318)
* Experimental support for post quantum dual key/signature certificates. A few known issues and sanitizer checks are in progress with this feature. Enabled with the configure flags --enable-experimental --enable-dual-alg-certs (PR 7112)
* CryptoCb support for PQC algorithms (PR 7110)

### OTHER FEATURE ADDITIONS
* The Linux kernel module now supports registration of AES-GCM, AES-XTS, AES-CBC, and AES-CFB with the kernel cryptosystem through the new --enable-linuxkm-lkcapi-register option, enabling automatic use of wolfCrypt implementations by the dm-crypt/luks and ESP subsystems. In particular, wolfCrypt AES-XTS with –enable-aesni is faster than the native kernel implementation.
* CryptoCb hook to one-shot CMAC functions (PR 7059)
* BER content streaming support for PKCS7_VerifySignedData and sign/encrypt operations (PR 6961 & 7184)
* IoT-Safe SHA-384 and SHA-512 support (PR 7176)
* I/O callbacks for content and output with PKCS7 bundle sign/encrypt to reduce peak memory usage (PR 7272)
* Microchip PIC24 support and example project (PR 7151)
* AutoSAR shim layer for RNG, SHA256, and AES (PR 7296)
* wolfSSL_CertManagerUnloadIntermediateCerts API to clear intermediate certs added to certificate store (PR 7245)
* Implement SSL_get_peer_signature_nid and SSL_get_peer_signature_type_nid (PR 7236)


## Enhancements and Optimizations

* Remove obsolete user-crypto functionality and Intel IPP support (PR 7097)
* Support for RSA-PSS signatures with CRL use (PR 7119)
* Enhancement for AES-GCM use with Xilsecure on Microblaze (PR 7051)
* Support for crypto cb only build with ECC and NXP CAAM (PR 7269)
* Improve liboqs integration adding locking and init/cleanup functions (PR 7026)
* Prevent memory access before clientSession->serverRow and clientSession->serverIdx are sanitized (PR 7096)
* Enhancements to reproducible build (PR 7267)
* Update Arduino example TLS Client/Server and improve support for ESP32 (PR 7304 & 7177)
* XC32 compiler version 4.x compatibility (PR 7128)
* Porting for build on PlayStation 3 and 4 (PR 7072)
* Improvements for Espressif use; SHA HW/SW selection and use on ESP32-C2/ESP8684, wolfSSL_NewThread() type, component cmake fix, and update TLS client example for ESP8266 (PR 7081, 7173, 7077, 7148, 7240)
* Allow crypto callbacks with SHA-1 HW (PR 7087)
* Update OpenSSH port to version 9.6p1(PR 7203)
* ARM Thumb2 enhancements, AES-GCM support for GCM_SMALL, alignment fix on key, fix for ASM clobber list (PR 7291,7301,7221)
* Expand heap hint support for static memory build with more x509 functions (PR 7136)
* Improving ARMv8 ChaCha20 ASM (alignment) (PR 7182)
* Unknown extension callback wolfSSL_CertManagerSetUnknownExtCallback added to CertManager (PR 7194)
* Implement wc_rng_new_ex for use with devID’s with crypto callback (PR 7271)
* Allow reading 0-RTT data after writing 0.5-RTT data (PR 7102)
* Send alert on bad PSK binder error (PR 7235)
* Enhancements to CMake build files for use with cross compiling (PR 7188)


## Fixes

* Fix for checking result of MAC verify when no AAD is used with AES-GCM and Xilinx Xilsecure (PR 7051)
* Fix for Aria sign use (PR 7082)
* Fix for invalid `dh_ffdhe_test` test case using Intel QuickAssist (PR 7085)
* Fixes for TI AES and SHA on TM4C with HW acceleration and add full AES GCM and CCM support with TLS (PR 7018)
* Fixes for STM32 PKA use with ECC (PR 7098)
* Fixes for TLS 1.3 with crypto callbacks to offload KDF / HMAC operation (PR 7070)
* Fix include path for FSP 3.5 on Renesas RA6M4 (PR 7101)
* Siphash x64 asm fix for use with older compilers (PR 7299)
* Fix for SGX build with SP (PR 7308)
* Fix to Make it mandatory that the cookie is sent back in new ClientHello when seen in a HelloRetryRequest with (PR 7190)
* Fix for wrap around behavior with BIO pairs (PR 7169)
* OCSP fixes for parsing of response correctly when there was a revocation reason and returning correct error value with date checks (PR 7241 & 7255)
* Fix build with `NO_STDIO_FILESYSTEM` and improve checks for `XGETENV` (PR 7150)
* Fix for DTLS sequence number and cookie when downgrading DTLS version (PR 7214)
* Fix for write_dup use with chacha-poly cipher suites (PR 7206)
* Fix for multiple handshake messages in one record failing with OUT_OF_ORDER_E when downgrading from TLS 1.3 to TLS 1.2 (PR 7141)
* Fix for AES ECB build with Thumb and alignment (PR 7094)
* Fix for negotiate handshake until the end in wolfSSL_read/wolfSSL_write if hitting an edge case with want read/write (PR 7237)

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)