How to add recipes
==================

For any test that you want to perform, you write a script located in
test/recipes/, named {nn}-test_{name}.t, where {nn} is a two digit number and
{name} is a unique name of your choice.

Please note that if a test involves a new testing executable, you will need to
do some additions in test/Makefile.  More on this later.


Naming conventions
=================

A test executable is named test/{name}test.c

A test recipe is named test/recipes/{nn}-test_{name}.t, where {nn} is a two
digit number and {name} is a unique name of your choice.

The number {nn} is (somewhat loosely) grouped as follows:

00-04  sanity, internal and essential API tests
05-09  individual symmetric cipher algorithms
10-14  math (bignum)
15-19  individual asymmetric cipher algorithms
20-24  openssl commands (some otherwise not tested)
25-29  certificate forms, generation and verification
30-35  engine and evp
60-79  APIs
   70  PACKET layer
80-89  "larger" protocols (CA, CMS, OCSP, SSL, TSA)
90-98  misc
99     most time consuming tests [such as test_fuzz]


A recipe that just runs a test executable
=========================================

A script that just runs a program looks like this:

    #! /usr/bin/perl

    use OpenSSL::Test::Simple;

    simple_test("test_{name}", "{name}test", "{name}");

{name} is the unique name you have chosen for your test.

The second argument to `simple_test' is the test executable, and `simple_test'
expects it to be located in test/

For documentation on OpenSSL::Test::Simple, do
`perldoc util/perl/OpenSSL/Test/Simple.pm'.


A recipe that runs a more complex test
======================================

For more complex tests, you will need to read up on Test::More and
OpenSSL::Test.  Test::More is normally preinstalled, do `man Test::More' for
documentation.  For OpenSSL::Test, do `perldoc util/perl/OpenSSL/Test.pm'.

A script to start from could be this:

    #! /usr/bin/perl

    use strict;
    use warnings;
    use OpenSSL::Test;

    setup("test_{name}");

    plan tests => 2;                # The number of tests being performed

    ok(test1, "test1");
    ok(test2, "test1");

    sub test1
    {
        # test feature 1
    }

    sub test2
    {
        # test feature 2
    }


Changes to test/build.info
==========================

Whenever a new test involves a new test executable you need to do the
following (at all times, replace {NAME} and {name} with the name of your
test):

* add {name} to the list of programs under PROGRAMS_NO_INST

* create a three line description of how to build the test, you will have
to modify the include paths and source files if you don't want to use the
basic test framework:

    SOURCE[{name}]={name}.c
    INCLUDE[{name}]=.. ../include
    DEPEND[{name}]=../libcrypto libtestutil.a

Generic form of C test executables
==================================

    #include "testutil.h"

    static int my_test(void)
    {
        int testresult = 0;                 /* Assume the test will fail    */
        int observed;

        observed = function();              /* Call the code under test     */
        if (!TEST_int_equal(observed, 2))   /* Check the result is correct  */
            goto end;                       /* Exit on failure - optional   */

        testresult = 1;                     /* Mark the test case a success */
    end:
        cleanup();                          /* Any cleanup you require      */
        return testresult;
    }

    int setup_tests(void)
    {
        ADD_TEST(my_test);                  /* Add each test separately     */
        return 1;                           /* Indicate success             */
    }

You should use the TEST_xxx macros provided by testutil.h to test all failure
conditions.  These macros produce an error message in a standard format if the
condition is not met (and nothing if the condition is met).  Additional
information can be presented with the TEST_info macro that takes a printf
format string and arguments.  TEST_error is useful for complicated conditions,
it also takes a printf format string and argument.  In all cases the TEST_xxx
macros are guaranteed to evaluate their arguments exactly once.  This means
that expressions with side effects are allowed as parameters.  Thus,

    if (!TEST_ptr(ptr = OPENSSL_malloc(..)))

works fine and can be used in place of:

    ptr = OPENSSL_malloc(..);
    if (!TEST_ptr(ptr))

The former produces a more meaningful message on failure than the latter.

Running external test suites with OpenSSL
=========================================

It is possible to integrate external test suites into OpenSSL's "make test".
This capability is considered a developer option and does not work on all
platforms.



The BoringSSL test suite
========================

In order to run the BoringSSL tests with OpenSSL, first checkout the BoringSSL
source code into an appropriate directory. This can be done in two ways:

1) Separately from the OpenSSL checkout using:

  $ git clone https://boringssl.googlesource.com/boringssl boringssl

  The BoringSSL tests are only confirmed to work at a specific commit in the
  BoringSSL repository. Later commits may or may not pass the test suite:

  $ cd boringssl
  $ git checkout 490469f850e

2) Using the already configured submodule settings in OpenSSL:

  $ git submodule update --init

Configure the OpenSSL source code to enable the external tests:

$ cd ../openssl
$ ./config enable-ssl3 enable-ssl3-method enable-weak-ssl-ciphers \
  enable-external-tests

Note that using other config options than those given above may cause the tests
to fail.

Run the OpenSSL tests by providing the path to the BoringSSL test runner in the
BORING_RUNNER_DIR environment variable:

$ BORING_RUNNER_DIR=/path/to/boringssl/ssl/test/runner make test

Note that the test suite may change directory while running so the path provided
should be absolute and not relative to the current working directory.

To see more detailed output you can run just the BoringSSL tests with the
verbose option:

$ VERBOSE=1 BORING_RUNNER_DIR=/path/to/boringssl/ssl/test/runner make \
  TESTS="test_external_boringssl" test


Test failures and suppressions
------------------------------

A large number of the BoringSSL tests are known to fail. A test could fail
because of many possible reasons. For example:

- A bug in OpenSSL
- Different interpretations of standards
- Assumptions about the way BoringSSL works that do not apply to OpenSSL
- The test uses APIs added to BoringSSL that are not present in OpenSSL
- etc

In order to provide a "clean" baseline run with all the tests passing a config
file has been provided that suppresses the running of tests that are known to
fail. These suppressions are held in the file "test/ossl_shim/ossl_config.json"
within the OpenSSL source code.

The community is encouraged to contribute patches which reduce the number of
suppressions that are currently present.


Python PYCA/Cryptography test suite
===================================

This python test suite runs cryptographic tests with a local OpenSSL build as
the implementation.

First checkout the PYCA/Cryptography module into ./pyca-cryptography using:

$ git submodule update --init

Then configure/build OpenSSL compatible with the python module:

$ ./config shared enable-external-tests
$ make

The tests will run in a python virtual environment which requires virtualenv
to be installed.

$ make test VERBOSE=1 TESTS=test_external_pyca

Test failures and suppressions
------------------------------

Some tests target older (<=1.0.2) versions so will not run. Other tests target
other crypto implementations so are not relevant. Currently no tests fail.


krb5 test suite
===============

Much like the PYCA/Cryptography test suite, this builds and runs the krb5
tests against the local OpenSSL build.

You will need a git checkout of krb5 at the top level:

$ git clone https://github.com/krb5/krb5

krb5's master has to pass this same CI, but a known-good version is
krb5-1.15.1-final if you want to be sure.

$ cd krb5
$ git checkout krb5-1.15.1-final
$ cd ..

OpenSSL must be built with external tests enabled:

$ ./config enable-external-tests
$ make

krb5's tests will then be run as part of the rest of the suite, or can be
explicitly run (with more debugging):

$ VERBOSE=1 make TESTS=test_external_krb5 test

Test-failures suppressions
--------------------------

krb5 will automatically adapt its test suite to account for the configuration
of your system.  Certain tests may require more installed packages to run.  No
tests are expected to fail.


Updating test suites
====================

To update the commit for any of the above test suites:

- Make sure the submodules are cloned locally:

  $ git submodule update --init --recursive

- Enter subdirectory and pull from the repository (use a specific branch/tag if required):

  $ cd <submodule-dir>
  $ git pull origin master

- Go to root directory, there should be a new git status:

  $ cd ../
  $ git status
  ...
  #       modified:   <submodule-dir> (new commits)
  ...

- Add/commit/push the update

  git add <submodule-dir>
  git commit -m "Updated <submodule> to latest commit"
  git push

# SSL tests

SSL testcases are configured in the `ssl-tests` directory.

Each `ssl_*.conf.in` file contains a number of test configurations. These files
are used to generate testcases in the OpenSSL CONF format.

The precise test output can be dependent on the library configuration. The test
harness generates the output files on the fly.

However, for verification, we also include checked-in configuration outputs
corresponding to the default configuration. These testcases live in
`test/ssl-tests/*.conf` files.

For more details, see `ssl-tests/01-simple.conf.in` for an example.

## Configuring the test

First, give your test a name. The names do not have to be unique.

An example test input looks like this:

```
    {
        name => "test-default",
        server => { "CipherString" => "DEFAULT" },
        client => { "CipherString" => "DEFAULT" },
        test   => { "ExpectedResult" => "Success" },
    }
```

The test section supports the following options

### Test mode

* Method - the method to test. One of DTLS or TLS.

* HandshakeMode - which handshake flavour to test:
  - Simple - plain handshake (default)
  - Resume - test resumption
  - RenegotiateServer - test server initiated renegotiation
  - RenegotiateClient - test client initiated renegotiation

When HandshakeMode is Resume or Renegotiate, the original handshake is expected
to succeed. All configured test expectations are verified against the second
handshake.

* ApplicationData - amount of application data bytes to send (integer, defaults
  to 256 bytes). Applies to both client and server. Application data is sent in
  64kB chunks (but limited by MaxFragmentSize and available parallelization, see
  below).

* MaxFragmentSize - maximum send fragment size (integer, defaults to 512 in
  tests - see `SSL_CTX_set_max_send_fragment` for documentation). Applies to
  both client and server. Lowering the fragment size will split handshake and
  application data up between more `SSL_write` calls, thus allowing to exercise
  different code paths. In particular, if the buffer size (64kB) is at least
  four times as large as the maximum fragment, interleaved multi-buffer crypto
  implementations may be used on some platforms.

### Test expectations

* ExpectedResult - expected handshake outcome. One of
  - Success - handshake success
  - ServerFail - serverside handshake failure
  - ClientFail - clientside handshake failure
  - InternalError - some other error

* ExpectedClientAlert, ExpectedServerAlert - expected alert. See
  `ssl_test_ctx.c` for known values. Note: the expected alert is currently
  matched against the _last_ received alert (i.e., a fatal alert or a
  `close_notify`). Warning alert expectations are not yet supported. (A warning
  alert will not be correctly matched, if followed by a `close_notify` or
  another alert.)

* ExpectedProtocol - expected negotiated protocol. One of
  SSLv3, TLSv1, TLSv1.1, TLSv1.2.

* SessionTicketExpected - whether or not a session ticket is expected
  - Ignore - do not check for a session ticket (default)
  - Yes - a session ticket is expected
  - No - a session ticket is not expected

* SessionIdExpected - whether or not a session id is expected
  - Ignore - do not check for a session id (default)
  - Yes - a session id is expected
  - No - a session id is not expected

* ResumptionExpected - whether or not resumption is expected (Resume mode only)
  - Yes - resumed handshake
  - No - full handshake (default)

* ExpectedNPNProtocol, ExpectedALPNProtocol - NPN and ALPN expectations.

* ExpectedTmpKeyType - the expected algorithm or curve of server temp key

* ExpectedServerCertType, ExpectedClientCertType - the expected algorithm or
  curve of server or client certificate

* ExpectedServerSignHash, ExpectedClientSignHash - the expected
  signing hash used by server or client certificate

* ExpectedServerSignType, ExpectedClientSignType - the expected
  signature type used by server or client when signing messages

* ExpectedClientCANames - for client auth list of CA names the server must
  send. If this is "empty" the list is expected to be empty otherwise it
  is a file of certificates whose subject names form the list.

* ExpectedServerCANames - list of CA names the client must send, TLS 1.3 only.
  If this is "empty" the list is expected to be empty otherwise it is a file
  of certificates whose subject names form the list.

## Configuring the client and server

The client and server configurations can be any valid `SSL_CTX`
configurations. For details, see the manpages for `SSL_CONF_cmd`.

Give your configurations as a dictionary of CONF commands, e.g.

```
server => {
    "CipherString" => "DEFAULT",
    "MinProtocol" => "TLSv1",
}
```

The following sections may optionally be defined:

* server2 - this section configures a secondary context that is selected via the
  ServerName test option. This context is used whenever a ServerNameCallback is
  specified. If the server2 section is not present, then the configuration
  matches server.
* resume_server - this section configures the client to resume its session
  against a different server. This context is used whenever HandshakeMode is
  Resume. If the resume_server section is not present, then the configuration
  matches server.
* resume_client - this section configures the client to resume its session with
  a different configuration. In practice this may occur when, for example,
  upgraded clients reuse sessions persisted on disk.  This context is used
  whenever HandshakeMode is Resume. If the resume_client section is not present,
  then the configuration matches client.

### Configuring callbacks and additional options

Additional handshake settings can be configured in the `extra` section of each
client and server:

```
client => {
    "CipherString" => "DEFAULT",
    extra => {
        "ServerName" => "server2",
    }
}
```

#### Supported client-side options

* ClientVerifyCallback - the client's custom certificate verify callback.
  Used to test callback behaviour. One of
  - None - no custom callback (default)
  - AcceptAll - accepts all certificates.
  - RejectAll - rejects all certificates.

* ServerName - the server the client should attempt to connect to. One of
  - None - do not use SNI (default)
  - server1 - the initial context
  - server2 - the secondary context
  - invalid - an unknown context

* CTValidation - Certificate Transparency validation strategy. One of
  - None - no validation (default)
  - Permissive - SSL_CT_VALIDATION_PERMISSIVE
  - Strict - SSL_CT_VALIDATION_STRICT

#### Supported server-side options

* ServerNameCallback - the SNI switching callback to use
  - None - no callback (default)
  - IgnoreMismatch - continue the handshake on SNI mismatch
  - RejectMismatch - abort the handshake on SNI mismatch

* BrokenSessionTicket - a special test case where the session ticket callback
  does not initialize crypto.
  - No (default)
  - Yes

#### Mutually supported options

* NPNProtocols, ALPNProtocols - NPN and ALPN settings. Server and client
  protocols can be specified as a comma-separated list, and a callback with the
  recommended behaviour will be installed automatically.

* SRPUser, SRPPassword - SRP settings. For client, this is the SRP user to
  connect as; for server, this is a known SRP user.

### Default server and client configurations

The default server certificate and CA files are added to the configurations
automatically. Server certificate verification is requested by default.

You can override these options by redefining them:

```
client => {
    "VerifyCAFile" => "/path/to/custom/file"
}
```

or by deleting them

```
client => {
    "VerifyCAFile" => undef
}
```

## Adding a test to the test harness

1. Add a new test configuration to `test/ssl-tests`, following the examples of
   existing `*.conf.in` files (for example, `01-simple.conf.in`).

2. Generate the generated `*.conf` test input file. You can do so by running
   `generate_ssl_tests.pl`:

```
$ ./config
$ cd test
$ TOP=.. perl -I ../util/perl/ generate_ssl_tests.pl ssl-tests/my.conf.in \
  > ssl-tests/my.conf
```

where `my.conf.in` is your test input file.

For example, to generate the test cases in `ssl-tests/01-simple.conf.in`, do

```
$ TOP=.. perl -I ../util/perl/ generate_ssl_tests.pl ssl-tests/01-simple.conf.in > ssl-tests/01-simple.conf
```

Alternatively (hackish but simple), you can comment out

```
unlink glob $tmp_file;
```

in `test/recipes/80-test_ssl_new.t` and run

```
$ make TESTS=test_ssl_new test
```

This will save the generated output in a `*.tmp` file in the build directory.

3. Update the number of tests planned in `test/recipes/80-test_ssl_new.t`. If
   the test suite has any skip conditions, update those too (see
   `test/recipes/80-test_ssl_new.t` for details).

## Running the tests with the test harness

```
HARNESS_VERBOSE=yes make TESTS=test_ssl_new test
```

## Running a test manually

These steps are only needed during development. End users should run `make test`
or follow the instructions above to run the SSL test suite.

To run an SSL test manually from the command line, the `TEST_CERTS_DIR`
environment variable to point to the location of the certs. E.g., from the root
OpenSSL directory, do

```
$ CTLOG_FILE=test/ct/log_list.conf TEST_CERTS_DIR=test/certs test/ssl_test \
  test/ssl-tests/01-simple.conf
```

or for shared builds

```
$ CTLOG_FILE=test/ct/log_list.conf  TEST_CERTS_DIR=test/certs \
  util/shlib_wrap.sh test/ssl_test test/ssl-tests/01-simple.conf
```

Note that the test expectations sometimes depend on the Configure settings. For
example, the negotiated protocol depends on the set of available (enabled)
protocols: a build with `enable-ssl3` has different test expectations than a
build with `no-ssl3`.

The Perl test harness automatically generates expected outputs, so users who
just run `make test` do not need any extra steps.

However, when running a test manually, keep in mind that the repository version
of the generated `test/ssl-tests/*.conf` correspond to expected outputs in with
the default Configure options. To run `ssl_test` manually from the command line
in a build with a different configuration, you may need to generate the right
`*.conf` file from the `*.conf.in` input first.