wolfPKCS11

PKCS#11 library that implements cryptographic algorithms using wolfSSL.

Project Features

Building

Build wolfSSL:

git clone https://github.com/wolfSSL/wolfssl.git
cd wolfssl
./autogen.sh
./configure --enable-aescfb --enable-cryptocb --enable-rsapss --enable-keygen --enable-pwdbased --enable-scrypt C_EXTRA_FLAGS="-DWOLFSSL_PUBLIC_MP -DWC_RSA_DIRECT"
make
make check
sudo make install
sudo ldconfig

autogen.sh requires: automake and libtool: sudo apt-get install automake libtool

Build wolfPKCS11:

git clone https://github.com/wolfSSL/wolfPKCS11.git
cd wolfPKCS11
./autogen.sh
./configure
make
make check

TPM support with wolfTPM

Enables using a TPM for cryptography and keystore. Tested using ./configure --enable-singlethreaded --enable-wolftpm --disable-dh CFLAGS="-DWOLFPKCS11_TPM_STORE" && make.

Note: The TPM does not support DH, so only RSA and ECC are supported.

Build options and defines

Define WOLFPKCS11_TPM_STORE

Use WOLFPKCS11_TPM_STORE storing objects in TPM NV.

Define WOLFPKCS11_NO_STORE

Disables storage of tokens.

Define WOLFPKCS11_DEBUG_STORE

Enables debugging printf's for store.

Define WOLFPKCS11_CUSTOM_STORE

Removes default implementation of storage functions. See wolfpkcs11/store.h for prototypes of functions to implement.

Define WOLFPKCS11_KEYPAIR_GEN_COMMON_LABEL

Sets the private key's label against the public key when generating key pairs.

Environment variables

WOLFPKCS11_TOKEN_PATH

Path into which files are stored that contain token data. When not set, defaults to: /tmp

WOLFPKCS11_NO_STORE

Set to any value to stop storage of token data.

Release Notes

wolfPKCS11 Release 1.3 (Mar 22, 2024)

Summary

Added Visual Studio support for wolfPKCS11. Fixes for cast warnings and portability.

Detail

• Fixed C_GetAttributeValue incorrectly erroring with CKR_ATTRIBUTE_VALUE_INVALID when data == NULL. The C_GetAttributeValue should set length if data field is NULL. (PR #27)
• Fixed several cast warnings and possible use of uninitialized. (PR #28)
• Fixed portability issues with WOLFPKCS11_USER_SETTINGS. (PR #28)
• Added Visual Studio support for wolfPKCS11. (PR #28)
  • This includes wolfTPM support with Windows TBS interface
• Reworked shared library versioning. (PR #29)

wolfPKCS11 Release 1.2 (Dec 26, 2023)

Summary

Adds backend support for TPM 2.0 using wolfTPM. Adds AES CBC key wrap / unwrap support. Portability improvements. Improved testing with GitHub Actions.

Detail

• Cleanups for minor cast warning, spelling and ignore for generated test files (PR #14)
• Added support for wrap/unwrap RSA with aes_cbc_pad. (PR #15)
• Fixed setting of label for public key after creation (init ECC objects before decoding) (PR #16)
• Flush writes in key store. (PR #17)
• Added build options for embedded use (PR #18)
  • WOLFSSL_USER_SETTINGS to avoid including wolfssl/options.h
  • WOLFPKCS11_USER_SETTINGS to avoid including wolfPKCS11/options.h
  • WOLFPKCS11_NO_TIME to make wc_GetTime() optional (it disables brute-force protections on token login)
• Reset failed login counter only with WOLFPKCS11_NO_TIME (PR #18)
• Fixed argument passing in SetMPI/GetMPIData (PR #19)
• Fixed NO_DH ifdef gate when freeing PKCS11 object (PR #20)
• Added GitHub CI action (PR #21)
• Fixed warnings from ./autogen.sh. Updated m4 macros. (PR #21)
• Added additional GitHub CI action tests. (PR #22)
• Added wolfPKCS11 support for using TPM 2.0 module as backend. Uses wolfTPM and supports RSA and ECC. Requires wolfSSL/wolfTPM#311 (PR #23)
• Added CI testing for wolfPKCS11 with wolfTPM backend and single threaded. (PR #23)
• Added PKCS11 TPM NV store (enabled with WOLFPKCS11_TPM_STORE). Allow WOLFPKCS11_NO_STORE for TPM use case. (PR #23)
• Fixed compiler warnings from mingw. (PR #23)
• Added portability macro WOLFPKCS11_NO_ENV when setenv/getenv are not available. (PR #23)
• Fix to only require -ldl for non-static builds. (PR #23)
• Portability fixes. Added NO_MAIN_DRIVER. Support for SINGLE_THREADED. Add static to some globals. (PR #24)
• Fixes for portability where XREALLOC is not available. (PR #25)
• Added support for custom setenv/get env using WOLFPKCS11_USER_ENV. (PR #25)
• Fix for final not being called after init in edge case pin failure. (PR #25)
• Added support for hashing PIN with SHA2-256.
  • PKS11 uses scrypt, which uses multiple MB of memory and is not practical for embedded systems. (PR #25)

wolfPKCS11 Release 1.1 (May 6, 2022)

• Added support for CKM_AES_CBC_PAD
• Added support for storage of token data.
• Added support encrypted private keys.
• Added CKF_LOGIN_REQUIRED to the slot flags.
• Added RSA X_509 support for signing/verifying
• Added missing CK_INVALID_SESSION.
• Added some missing PKCS11 types.
• Fixed building with FIPS 140-2 (fipsv2).
• Fixed WP11_API visibility.
• Fixed test pin to be at least 14-characters as required by FIPS HMAC.
• Fixed getting a boolean for the operations flags.
• Fixed misleading indentation fixes.
• Improve the curve_oid lookup with FIPS.
• Removed config.h from the public pkcs11.h header.
• Convert repository to GPLv3.

wolfPKCS11 Release 1.0 (October 20, 2021)

• Initial PKCS11 support