a sister project for
Qt5 developers is available as qpolarssl, although
mbedcrypto is newer and has more features with smaller footprint and can be configured to support
QByteArray through the api.
for more information see wiki page.
features and highlights
- small size: the
mbedcryptois less than
250KBin size (as single shared library and stripped under Linux and OS X) with all predefined algorithms. it can be easily embedded into your service or application.
- easy to use: although cryptographynote is complex and complicated,
mbedcryptohides most of the complexities, tries to be easy to use and hard to misuse.
- portable: needs an standard
c++14compiler and compliant
stl, compiled and tested by:
g++ 5.x+ / 6+under
msvc 2015community edition under
- low dependency:
- high+low level: both high level (c++ objects / exception) and low level (c pointer / error code) functions are available.
- highly configurable: to add or remove the algorithms, simply change
cmakebuild options. see build options
- optional support for Qt5: optional support for Qt5's
QByteArrayis also available.
following algorithms are included in
mbedcrypto in default build (see wiki usage):
binary/text conversions: see wiki: samples
hashes (message digest): see wiki: samples
- optional hashes:
ciphers (symmetric): see wiki: samples
aes(128, 192, 256 bits) and
- optional ciphers:
cipher block modes:
cbccipher block chaining
ccm(counter cbc-mac) modes. see authneticated encryption with additional data (AEAD)
- optional block modes:
- one and zeros
- zeros and length
random byte generator: see wiki samples
ctr_drbgcounter mode deterministic random byte generator based on
aes-256NIST SP 800-90
derkey formats (ASN.1)
- optional pks:
eckey_dhelliptic key Diffie–Hellman,
ecdsaelliptic key digital signature algorithm,
rsassa_pssRSA standard signature algorithm, probabilistic signature scheme
ec curvesfrom well known domain parameters as
total number of supported algorithms:
- hashes: 9
- paddings: 5
- ciphers: 47
- pki: 6
to setup all 3rdparty dependencies:
$mbedcrypto> ./setup.sh all # optionally: $> ./setup.sh help
this script downloads the latest release files (master branch) of dependencies into
mbedcrypto library using
CMake in your terminal:
$workspace/> mkdir mbedcrypto.build $workspace/> cd mbedcrypto.build $mbedcrypto.build/> cmake /path/to/mbedcrypto # optionally to reconfigure the build option (or by cmake-gui .) $mbedcrypto.build/> ccmake . $mbedcrypto.build/> make -j $mbedcrypto.build/> make install
to trim the library size, only SHA/AES/RSA algorithms are included. you can add other algorithms by these cmake options:
|MBEDCRYPTO_MD2||enable md2 hash (insecure and deprecated)|
|MBEDCRYPTO_MD4||enable md4 hash|
|MBEDCRYPTO_RIPEMD160||enable ripemd160 hash|
|MBEDCRYPTO_CFB||enable cfb (cipher feedback mode)|
|MBEDCRYPTO_CTR||enable ctr (cipher counter mode)|
|MBEDCRYPTO_GCM||enable gcm (Galois cipher mode, for aead cryptography)|
|MBEDCRYPTO_CCM||enable ccm (counter cbc-mac cipher mode, for aead cryptography)|
|MBEDCRYPTO_DES||enable des and triple-des cipher|
|MBEDCRYPTO_BLOWFISH||enable blowfish cipher|
|MBEDCRYPTO_CAMELLIA||enable camellia cipher|
|MBEDCRYPTO_ARC4||enable arc4 cipher (insecure)|
|MBEDCRYPTO_PK_EXPORT||enable export keys in pem or der format|
|MBEDCRYPTO_RSA_KEYGEN||enable rsa key generator|
|MBEDCRYPTO_EC||enable eckey, eckey_dh and ecdsa algorithms|
|MBEDCRYPTO_Qt5||also adds adaptors around Qt5's
please see CMakeLists.txt for the full list.
samples and unit tests are available under tests/tdd folder.
#run the tests $mbedcrypto.xbin64/> ./mbedcrypto-tests
supports 6 hash algorithms: MD5 , SHA1 , SHA224 , SHA256 , SHA384 , SHA512 , supports 5 padding algorithms: PKCS7 , ONE_AND_ZEROS , ZEROS_AND_LEN , ZEROS , NONE , supports 6 block modes: NONE , ECB , CBC , CTR , GCM , CCM , supports 21 cipher algorithms: AES-128-ECB , AES-192-ECB , AES-256-ECB , AES-128-CBC , AES-192-CBC , AES-256-CBC , AES-128-CTR , AES-192-CTR , AES-256-CTR , AES-128-GCM , AES-192-GCM , AES-256-GCM , DES-ECB , DES-CBC , DES-EDE-ECB , DES-EDE-CBC , DES-EDE3-ECB , DES-EDE3-CBC , AES-128-CCM , AES-192-CCM , AES-256-CCM , this system supports AESNI (hardware accelerated AES) this build supports AEAD (authenticated encryption with additional data) supports 4 pk (public key) algorithms: RSA , EC , EC_DH , ECDSA , this build supports PK export (*.pem, *.der) facility this build supports RSA key generation this build supports EC (elliptic curve) key generation supports 12 elliptic curves: SECP192R1 , SECP224R1 , SECP256R1 , SECP384R1 , SECP521R1 , SECP192K1 , SECP224K1 , SECP256K1 , BP256R1 , BP384R1 , BP512R1 , CURVE25519 , =============================================================================== All tests passed (952 assertions in 17 test cases)
cryptography is both complex and complicated, it requires a vast knowledge of mathematics, concepts, principles, algorithms, standards, conventions, continuous investigation of attacks, ...
As cryptography is mostly used to protect sensitive data, writing a library for it is a daunting task and difficult by any factor.
So instead of writing a library from scratch,
mbedcrypto stands on the shoulders of giants,
mbedtls is this case.
Although mbedtls is mostly a
TLS/SSL library for embedded devices, it has already implemented the most famous and widely used cryptographic algorithms and actively developed and maintained.
mbedtls has cleaner code than
openssl, it's easier to read, use and maintain, and it has been designed for efficiency and portability from scratch (for embedded devices), and has many advantages over
openssl like as readability, size, compiling and setup, … to name a few.
- implementing an easy-to-use, lightweight and portable
c++library for cryptography are the main purpose of
- there are many more algorithms in cryptographic libraries, the focus of
mbedcryptois on the most important or widely used algorithms, tries to be simple and not to bloat your application.
- as mentioned in notes, the cryptography can be divided into several areas of study and best practices, I'm not a guru nor a specialist in this field.
If you have any ideas, critiques, suggestions or whatever you want to call it, please open an issue. I'll be happy to hear from you what you'd see in this lib. I think about all suggestions, and I try to add those that make sense.
Distributed under the MIT license. Copyright (c) 2016, Amir Zamani.