80d99ea038
Since we wish to generate RSASSA-PSS signatures even when hashes are relatively large for the chosen RSA key size, we need some tests. Our main focus will be on 1024-bit keys and the couple key sizes larger than it. For example, we test for a signature generated using a salt length of 63 when a 1032-bit key is used. Other tests check the boundary conditions around other key sizes. We want to make sure we don't use a salt length larger than the hash length (because FIPS 186-4 requires this). We also want to make sure we don't use a salt that is too small (no smaller than 2 bytes away from the hash length). Test RSASSA-PSS signatures with: - 1024-bit key and SHA-512 (slen 62) - 1032-bit key and SHA-512 (slen 63) - 1040-bit key and SHA-512 (slen 64) - 1048-bit key and SHA-512 (slen 64) The tests also verify that we can properly verify the RSASSA-PSS signatures we've generated. We've manually verified that OpenSSL 1.1.1-pre8 can verify the RSASSA-PSS signatures we've generated. $ openssl rsa -in rsa1024.pem -pubout -out pub1024.pem writing RSA key $ openssl rsa -in rsa1032.pem -pubout -out pub1032.pem writing RSA key $ openssl rsa -in rsa1040.pem -pubout -out pub1040.pem writing RSA key $ openssl rsa -in rsa1048.pem -pubout -out pub1048.pem writing RSA key $ cat message.bin | openssl dgst -sha512 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:62 -verify pub1024.pem -signature valid1024.bin Verified OK $ cat message.bin | openssl dgst -sha512 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:63 -verify pub1032.pem -signature valid1032.bin Verified OK $ cat message.bin | openssl dgst -sha512 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:64 -verify pub1040.pem -signature valid1040.bin Verified OK $ cat message.bin | openssl dgst -sha512 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:64 -verify pub1048.pem -signature valid1048.bin Verified OK We've also added a new test that ensures we can properly validate a RSASSA-PSS 1032-bit signature with SHA-512 generated by OpenSSL. This has been added as the "RSASSA-PSS Verify OpenSSL-generated Signature 1032-bit w/SHA-512" test. The signature to verify was generated with the following command line. $ cat message.bin | openssl dgst -sha512 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:63 -sign rsa1032.pem > valid.bin The RSA private keys used by these tests were generated with OpenSSL 1.1.1-pre8. $ openssl genrsa 1024 Generating RSA private key, 1024 bit long modulus (2 primes) ........................................++++++ ......++++++ e is 65537 (0x010001) -----BEGIN RSA PRIVATE KEY----- MIICWwIBAAKBgQDDyYc1SFQ1kcH5R+QSwz2la50blKWML0EKimIOm08dkZdkPr9S f19isgK51noyZU0F8yapth4BBu/fSClnPE89I2VZluJCQFmRarR6pn5AbBKWeeWX nKRnCIZmCP+iH2GYQ7lZtEQuQiWYovqrVKjO8fExmSZ30s9byvK1Vk90GQIDAQAB AoGAG1BnO4i+rsaJ8DQWXoO8evJ7dZiUS+1fvo+1xGHodLCWFVcnq+O3M/avqKuC WruFNlpIv453ux7zogvYMt3YE+ny//kgh5gUh0O1mXPbZtF4gGxsqXdV13lMW9dK ZH2ltN94MwynrXl74m2P4uCHWIHLE9+ZyWRzwH/c/o1E4n0CQQDo+VpxbBJ9UUfc wkGnwf6NVIez6LbpXkioMzTSHQDHmtCpDimUHAxTBlsgBZ3pXp5AYGFBb3rBLtyh mDue4ozDAkEA1yNIspfn5dxDKfarh0sXmCWE4KtDF0Bwqb6YPA8EAyDW+JPEDScX yzBEOAyzIwtxM2IescVaPqVtDnzuaUtd8wJAdOP3XwUsWbgYaEkHDBank12gIMJY U8q8hbf7fpiStZOVsdyrO+a+wEFmIzDuRBL3L7Gr2lsGqjrK9EEfWN6uZQJAOJml 1Ka2cfkDCpVFB3EwIe0tClbEbeecPGxSbOqeaZxIMlnd6H/yeJiYOg7NSlkGTThx Tt/XIEgxavBfYQBdFQJAMFmLr9DL5lWAZNAHspJ8R5NdoOcsrKV9tb24cu0YapuZ rSPwmebskHyinvoBsD2CthUtpSo3NE+xZ6HcfYca9w== -----END RSA PRIVATE KEY----- $ openssl genrsa 1032 Generating RSA private key, 1032 bit long modulus (2 primes) ....................++++++ .................................++++++ e is 65537 (0x010001) -----BEGIN RSA PRIVATE KEY----- MIICYAIBAAKBggCqlKuRtMJr4lfkaVKCKMSwtrTJnnOoSicrMQGJLAdAaRE3K4Ps SnuBkfC6S0y0yztzIHTpbGaCl+EyO4rQgip+FRGC3vA4caZqR7cEuShFxhlBQtTu 2hmQPgQENYH3qDXcKIEXhj0hlEw67e1RhFjxowpBx2OKpOCYqI/fLCCXJw0CAwEA AQKBgWcY+CFWePOvl6OrrHySm16a7uW06P5b4xSNx/naLH/XgNoxaMiVs9P6Gt7d x/y1oLbSdRbnt4VSun8b0ah4I6qEyk3MdfiNnhy24LlCuv0TOLbQVibjH+5Q+iP2 995ssUrkfPa/QAA95nPVaDhcsATSh32JagE0rkItukalyc/IGQJBDfrttwmtohBS I+XndkpfMdB656N73HtKVsJJnhFzFHvNyxZbj7AaJSgZDLaHRlapNkkYmPyjMNuK 9antVBcmjtcCQQwznFZ5epDGQSklYNDvZ19xrCyZ/KumJgw45PFn39F563qeJV+b 28VJ5BgfmioZsfMKgLKS1e8a11ueZY6qb7C7AkEExSw7mmfOtrbwXNAfwry8qKBn TZdD4iW5eM3Zy6ZyxNOxik1vt+0T5Jy3g8igrY1LYqGsAfhFAYRm0raSTNvxPQJB AUcOIYfKq4n2nKZLQtUuT7IJQwpEiHx3E2SJpDUqHDbVzxrr8tzQ4BFijpwQekQC e94np4r0V3rJ/c/R9mQmGa0CQQrd2veAgj1F7Rma7zE4vYhvCf0XB1rshw972xGo BTAU4BagC7/vht1YXhhdz1FC36DrWm3veTwLLuNUQTJWsYIH -----END RSA PRIVATE KEY----- $ openssl genkey 1040 Generating RSA private key, 1040 bit long modulus ........++++++ ........++++++ e is 65537 (0x10001) -----BEGIN RSA PRIVATE KEY----- MIICZgIBAAKBgwDSNAU4Ix3NWmHt+Dq5Sy5LOnhDlMTtNaQkwFDClBV7diX5rKgl jCHi0Keqm3ydtXZATmMJDbpQ2Zj5o+xysaXPKNgyUauTNBx9LBqQQD1w9nvBqeQT vGL6zMtSRB4kw/K8n97KGngwEucLlSgXYmBYDE4QJsWCCejcxN478/W+VWXpAgMB AAECgYMAutjQ1uCoKhSwPgbLtE92vBoiMvh3v99Ro/VrFDrriY4xHWlzIcUZjfMp Rsblk45sqabD85VHS3zQtP8YO69bkvK+r5upGfzLtzX8r5BVuO1+7oO+/jbRHLYJ ieBoFZbUc27YcKzR35Iv78d+KjygYIsWgt7W2Yqf6qt98r43WcrYsQJCAPx/S0kL TT73Kdsj+1r7tfL8YgpHI0LYuP8xDP3BJL523CKrb0vjWjjd0x8k1/ZNMQ9nqzo3 XoP04FWeTLXcQ+h1AkIA1R6GgKtx3AHhqKaKKYY2uxZYz6uNc85SimJpdyLUhauQ za/F4ndot2GDn/k0IEWK5V8VppRl28DHtSTcmjhf+SUCQT4RVIJaItztiP5zc+BD q9BVNgxsvEA8Yg1pE1Z1WgDv2uEy3yL6ej0sWi93sRa8lujAhRjEb5lkYpjpVtYF lTPZAkIAlt1yB3nWMxEd5l5mZbi927iZDAF8M+N1aML7t7tvSGTIL+LjKUqwVUhx ffhSXxn7lh22XOKmLGcOuHussnt/7QUCQS2GWdSBu7DGZ5uIvZVj+5KPTwv3Pw9+ uuj12Z3shojl1iVije7nsBK1q3NbrXksEiQ4QJIoK2V2quqD58O2/K8T -----END RSA PRIVATE KEY----- $ openssl genrsa 1048 Generating RSA private key, 1048 bit long modulus (2 primes) ...............................++++++ .++++++ e is 65537 (0x010001) -----BEGIN RSA PRIVATE KEY----- MIICaQIBAAKBhADHXQ+foX0dJLk5U3pDQBfzkMZgRETDWhM2DWsfyYa69AFZuEJ1 03uIMnjfUGTdnrDymw0yWsx5DEtZZyc32786y4j14vLVTJGcr9ByJyxJRZHVLhWJ kzFeceLKYLHHT+/489d4QrQV1OcXNKSYIGpc2TFch7I+WD4l60ypcFa0XJaFbQID AQABAoGDSqKtUa6sXze7XBnDYN/i151wluOX9qaHIKo/W4Qfu2fUBZm0z9Wfnqp+ k+PODyX0yq5/b0WM3RhcMRksFn5fBgzYHEmAj8IHhDsjavNtiv8nIl6EF2PfuT1p 6iEpo8IS15dp6j5AKH4Zmnq6TRYiqdaz/ry/kpQrmeJym83KksujZWUCQg85t5gJ UWvswuNIG2tHWEqiKZvSAnq4owO53lsK3LSl04447bjB+sPqHb1+HVC4QyPjYs/0 3z9aUYLa+pu5IXpz1wJCDRgWT4vQ1Y0BmZjIyxfEwDVOYripRirMowgWiU+YLCrh FOc5k+MGmJMEN7TuxErewk0yzLy658xMn4kRseshAGhbAkIBClKPIuPbWfwfB4hI FkHkJ5xsNzdQJ1mMIaEd22olNcd0ylMD8s0tocuSbRGXuF9uDlVsHDE85PD43fmN tmKhOVUCQgG6H5c2VcEU7BUaNcGzzNudLE2RFaKPmpYWRwKtYODSdwWOyeVbmE8f dPrz/lodlewCyqR+cBiKtcCFD7Rr0tp+6QJCALZlz954leZ6UKkdeOiTb+fVFpsq DNNALCL4VJ7XcJJMpjgSKYv9sr1C43nifr1M4YDH+B3NFRF+FWdVodaseOKF -----END RSA PRIVATE KEY----- |
||
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.github | ||
configs | ||
doxygen | ||
include | ||
library | ||
programs | ||
scripts | ||
tests | ||
visualc/VS2010 | ||
yotta | ||
.gitignore | ||
.pylint | ||
.travis.yml | ||
apache-2.0.txt | ||
ChangeLog | ||
circle.yml | ||
CMakeLists.txt | ||
CONTRIBUTING.md | ||
DartConfiguration.tcl | ||
LICENSE | ||
Makefile | ||
README.md |
README for Mbed TLS
Configuration
Mbed TLS should build out of the box on most systems. Some platform specific options are available in the fully documented configuration file include/mbedtls/config.h
, which is also the place where features can be selected. This file can be edited manually, or in a more programmatic way using the Perl script scripts/config.pl
(use --help
for usage instructions).
Compiler options can be set using conventional environment variables such as CC
and CFLAGS
when using the Make and CMake build system (see below).
Compiling
There are currently four active build systems used within Mbed TLS releases:
- yotta
- GNU Make
- CMake
- Microsoft Visual Studio (Microsoft Visual Studio 2010 or later)
The main systems used for development are CMake and GNU Make. Those systems are always complete and up-to-date. The others should reflect all changes present in the CMake and Make build system, although features may not be ported there automatically.
Yotta, as a build system, is slightly different from the other build systems:
- it provides a minimalistic configuration file by default
- depending on the yotta target, features of Mbed OS may be used in examples and tests
The Make and CMake build systems create three libraries: libmbedcrypto, libmbedx509, and libmbedtls. Note that libmbedtls depends on libmbedx509 and libmbedcrypto, and libmbedx509 depends on libmbedcrypto. As a result, some linkers will expect flags to be in a specific order, for example the GNU linker wants -lmbedtls -lmbedx509 -lmbedcrypto
. Also, when loading shared libraries using dlopen(), you'll need to load libmbedcrypto first, then libmbedx509, before you can load libmbedtls.
Yotta
yotta is a package manager and build system developed by Mbed, and is the build system of Mbed OS 16.03. To install it on your platform, please follow the yotta installation instructions.
Once yotta is installed, you can use it to download the latest version of Mbed TLS from the yotta registry with:
yotta install mbedtls
and build it with:
yotta build
If, on the other hand, you already have a copy of Mbed TLS from a source other than the yotta registry, for example from cloning our GitHub repository, or from downloading a tarball of the standalone edition, then you'll first need to generate the yotta module by running:
yotta/create-module.sh
This should be executed from the root Mbed TLS project directory. This will create the yotta module in the yotta/module
directory within it. You can then change to that directory and build as usual:
cd yotta/module
yotta build
In any case, you'll probably want to set the yotta target before building unless it has already been set globally. For more information on using yotta, please consult the yotta documentation.
For more details on the yotta/Mbed OS edition of Mbed TLS, including example programs, please consult the Readme at the root of the yotta module.
Make
We require GNU Make. To build the library and the sample programs, GNU Make and a C compiler are sufficient. Some of the more advanced build targets require some Unix/Linux tools.
We intentionally only use a minimum of functionality in the makefiles in order to keep them as simple and independent of different toolchains as possible, to allow users to more easily move between different platforms. Users who need more features are recommended to use CMake.
In order to build from the source code using GNU Make, just enter at the command line:
make
In order to run the tests, enter:
make check
The tests need Perl to be built and run. If you don't have Perl installed, you can skip building the tests with:
make no_test
You'll still be able to run a much smaller set of tests with:
programs/test/selftest
In order to build for a Windows platform, you should use WINDOWS_BUILD=1
if the target is Windows but the build environment is Unix-like (for instance when cross-compiling, or compiling from an MSYS shell), and WINDOWS=1
if the build environment is a Windows shell (for instance using mingw32-make) (in that case some targets will not be available).
Setting the variable SHARED
in your environment will build shared libraries in addition to the static libraries. Setting DEBUG
gives you a debug build. You can override CFLAGS
and LDFLAGS
by setting them in your environment or on the make command line; compiler warning options may be overridden separately using WARNING_CFLAGS
. Some directory-specific options (for example, -I
directives) are still preserved.
Please note that setting CFLAGS
overrides its default value of -O2
and setting WARNING_CFLAGS
overrides its default value (starting with -Wall -W
), so it you just want to add some warning options to the default ones, you can do so by setting CFLAGS=-O2 -Werror
for example. Setting WARNING_CFLAGS
is useful when you want to get rid of its default content (for example because your compiler doesn't accept -Wall
as an option). Directory-specific options cannot be overriden from the command line.
Depending on your platform, you might run into some issues. Please check the Makefiles in library/
, programs/
and tests/
for options to manually add or remove for specific platforms. You can also check the Mbed TLS Knowledge Base for articles on your platform or issue.
In case you find that you need to do something else as well, please let us know what, so we can add it to the Mbed TLS Knowledge Base.
CMake
In order to build the source using CMake in a separate directory (recommended), just enter at the command line:
mkdir /path/to/build_dir && cd /path/to/build_dir
cmake /path/to/mbedtls_source
make
In order to run the tests, enter:
make test
The test suites need Perl to be built. If you don't have Perl installed, you'll want to disable the test suites with:
cmake -DENABLE_TESTING=Off /path/to/mbedtls_source
If you disabled the test suites, but kept the programs enabled, you can still run a much smaller set of tests with:
programs/test/selftest
To configure CMake for building shared libraries, use:
cmake -DUSE_SHARED_MBEDTLS_LIBRARY=On /path/to/mbedtls_source
There are many different build modes available within the CMake buildsystem. Most of them are available for gcc and clang, though some are compiler-specific:
Release
. This generates the default code without any unnecessary information in the binary files.Debug
. This generates debug information and disables optimization of the code.Coverage
. This generates code coverage information in addition to debug information.ASan
. This instruments the code with AddressSanitizer to check for memory errors. (This includes LeakSanitizer, with recent version of gcc and clang.) (With recent version of clang, this mode also instruments the code with UndefinedSanitizer to check for undefined behaviour.)ASanDbg
. Same as ASan but slower, with debug information and better stack traces.MemSan
. This instruments the code with MemorySanitizer to check for uninitialised memory reads. Experimental, needs recent clang on Linux/x86_64.MemSanDbg
. Same as MemSan but slower, with debug information, better stack traces and origin tracking.Check
. This activates the compiler warnings that depend on optimization and treats all warnings as errors.
Switching build modes in CMake is simple. For debug mode, enter at the command line:
cmake -D CMAKE_BUILD_TYPE=Debug /path/to/mbedtls_source
To list other available CMake options, use:
cmake -LH
Note that, with CMake, you can't adjust the compiler or its flags after the
initial invocation of cmake. This means that CC=your_cc make
and make CC=your_cc
will not work (similarly with CFLAGS
and other variables).
These variables need to be adjusted when invoking cmake for the first time,
for example:
CC=your_cc cmake /path/to/mbedtls_source
If you already invoked cmake and want to change those settings, you need to remove the build directory and create it again.
Note that it is possible to build in-place; this will however overwrite the
provided Makefiles (see scripts/tmp_ignore_makefiles.sh
if you want to
prevent git status
from showing them as modified). In order to do so, from
the Mbed TLS source directory, use:
cmake .
make
If you want to change CC
or CFLAGS
afterwards, you will need to remove the
CMake cache. This can be done with the following command using GNU find:
find . -iname '*cmake*' -not -name CMakeLists.txt -exec rm -rf {} +
You can now make the desired change:
CC=your_cc cmake .
make
Regarding variables, also note that if you set CFLAGS when invoking cmake, your value of CFLAGS doesn't override the content provided by cmake (depending on the build mode as seen above), it's merely prepended to it.
Microsoft Visual Studio
The build files for Microsoft Visual Studio are generated for Visual Studio 2010.
The solution file mbedTLS.sln
contains all the basic projects needed to build the library and all the programs. The files in tests are not generated and compiled, as these need a perl environment as well. However, the selftest program in programs/test/
is still available.
Example programs
We've included example programs for a lot of different features and uses in programs/
. Most programs only focus on a single feature or usage scenario, so keep that in mind when copying parts of the code.
Tests
Mbed TLS includes an elaborate test suite in tests/
that initially requires Perl to generate the tests files (e.g. test\_suite\_mpi.c
). These files are generated from a function file
(e.g. suites/test\_suite\_mpi.function
) and a data file
(e.g. suites/test\_suite\_mpi.data
). The function file
contains the test functions. The data file
contains the test cases, specified as parameters that will be passed to the test function.
For machines with a Unix shell and OpenSSL (and optionally GnuTLS) installed, additional test scripts are available:
tests/ssl-opt.sh
runs integration tests for various TLS options (renegotiation, resumption, etc.) and tests interoperability of these options with other implementations.tests/compat.sh
tests interoperability of every ciphersuite with other implementations.tests/scripts/test-ref-configs.pl
test builds in various reduced configurations.tests/scripts/key-exchanges.pl
test builds in configurations with a single key exchange enabledtests/scripts/all.sh
runs a combination of the above tests, plus some more, with various build options (such as ASan, fullconfig.h
, etc).
Configurations
We provide some non-standard configurations focused on specific use cases in the configs/
directory. You can read more about those in configs/README.txt
Porting Mbed TLS
Mbed TLS can be ported to many different architectures, OS's and platforms. Before starting a port, you may find the following Knowledge Base articles useful:
- Porting Mbed TLS to a new environment or OS
- What external dependencies does Mbed TLS rely on?
- How do I configure Mbed TLS
Contributing
We gratefully accept bug reports and contributions from the community. There are some requirements we need to fulfill in order to be able to integrate contributions:
- All contributions, whether large or small require a Contributor's License Agreement (CLA) to be accepted. This is because source code can possibly fall under copyright law and we need your consent to share in the ownership of the copyright.
- We would ask that contributions conform to our coding standards, and that contributions should be fully tested before submission.
- As with any open source project, contributions will be reviewed by the project team and community and may need some modifications to be accepted.
To accept the Contributor’s Licence Agreement (CLA), individual contributors can do this by creating an Mbed account and accepting the online agreement here with a click through. Alternatively, for contributions from corporations, or those that do not wish to create an Mbed account, a slightly different agreement can be found here. This agreement should be signed and returned to Arm as described in the instructions given.
Making a Contribution
- Check for open issues or start a discussion around a feature idea or a bug.
- Fork the Mbed TLS repository on GitHub to start making your changes. As a general rule, you should use the "development" branch as a basis.
- Write a test which shows that the bug was fixed or that the feature works as expected.
- Send a pull request and bug us until it gets merged and published. Contributions may need some modifications, so work with us to get your change accepted. We will include your name in the ChangeLog :)