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-rw-r--r--libbutl/openssl.hxx35
-rw-r--r--libbutl/openssl.ixx9
-rw-r--r--libbutl/openssl.txx63
-rw-r--r--tests/openssl/driver.cxx24
4 files changed, 127 insertions, 4 deletions
diff --git a/libbutl/openssl.hxx b/libbutl/openssl.hxx
index 58e38f8..b340f5c 100644
--- a/libbutl/openssl.hxx
+++ b/libbutl/openssl.hxx
@@ -8,8 +8,10 @@
#include <libbutl/path.hxx>
#include <libbutl/process.hxx>
+#include <libbutl/optional.hxx>
#include <libbutl/fdstream.hxx>
#include <libbutl/small-vector.hxx>
+#include <libbutl/semantic-version.hxx>
#include <libbutl/export.hxx>
@@ -78,6 +80,23 @@ namespace butl
// department (that were apparently fixed in 1.0.2). To work around these
// bugs pass user-supplied options first.
//
+ struct openssl_info
+ {
+ // Note that the program name can be used by the caller to properly
+ // interpret the version.
+ //
+ // The name/version examples:
+ //
+ // OpenSSL 3.0.0
+ // OpenSSL 1.1.1l
+ // LibreSSL 2.8.3
+ //
+ // The `l` component above ends up in semantic_version::build.
+ //
+ std::string name;
+ semantic_version version;
+ };
+
class LIBBUTL_SYMEXPORT openssl: public process
{
public:
@@ -111,6 +130,22 @@ namespace butl
const std::string& command,
A&&... options);
+ // Run `openssl version` command and try to parse and return the
+ // information it prints to stdout. Return nullopt if the process hasn't
+ // terminated successfully or stdout parsing has failed. Throw
+ // process_error and io_error in case of errors.
+ //
+ template <typename E>
+ static optional<openssl_info>
+ info (E&& err, const process_env&);
+
+ template <typename C,
+ typename E>
+ static optional<openssl_info>
+ info (const C&,
+ E&& err,
+ const process_env&);
+
private:
template <typename T>
struct is_other
diff --git a/libbutl/openssl.ixx b/libbutl/openssl.ixx
index 1435dcb..db2fbcd 100644
--- a/libbutl/openssl.ixx
+++ b/libbutl/openssl.ixx
@@ -26,4 +26,13 @@ namespace butl
std::forward<A> (options)...)
{
}
+
+ template <typename E>
+ inline optional<openssl_info> openssl::
+ info (E&& err, const process_env& env)
+ {
+ return info ([] (const char* [], std::size_t) {},
+ std::forward<E> (err),
+ env);
+ }
}
diff --git a/libbutl/openssl.txx b/libbutl/openssl.txx
index f198c22..01e854c 100644
--- a/libbutl/openssl.txx
+++ b/libbutl/openssl.txx
@@ -1,6 +1,7 @@
// file : libbutl/openssl.txx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
+#include <cstddef> // size_t
#include <utility> // forward()
namespace butl
@@ -49,4 +50,66 @@ namespace butl
// Note: leaving this scope closes any open ends of the pipes in io_data.
}
+
+ template <typename C,
+ typename E>
+ optional<openssl_info> openssl::
+ info (const C& cmdc, E&& err, const process_env& env)
+ {
+ using namespace std;
+
+ // Run the `openssl version` command.
+ //
+ openssl os (cmdc,
+ nullfd, fdstream_mode::text, forward<E> (err),
+ env,
+ "version");
+
+ // Read the command's stdout and wait for its completion. Bail out if the
+ // command didn't terminate successfully or stdout contains no data.
+ //
+ string s;
+ if (!getline (os.in, s))
+ return nullopt;
+
+ os.in.close ();
+
+ if (!os.wait ())
+ return nullopt;
+
+ // Parse the version string.
+ //
+ // Note that there is some variety in the version representations:
+ //
+ // OpenSSL 3.0.0 7 sep 2021 (Library: OpenSSL 3.0.0 7 sep 2021)
+ // OpenSSL 1.1.1l FIPS 24 Aug 2021
+ // LibreSSL 2.8.3
+ //
+ // We will only consider the first two space separated components as the
+ // program name and version. We will also assume that there are no leading
+ // spaces and the version is delimited from the program name with a single
+ // space character.
+ //
+ size_t e (s.find (' '));
+
+ // Bail out if there is no version present in the string or the program
+ // name is empty.
+ //
+ if (e == string::npos || e == 0)
+ return nullopt;
+
+ string nm (s, 0, e);
+
+ size_t b (e + 1); // The beginning of the version.
+ e = s.find (' ', b); // The end of the version.
+
+ optional<semantic_version> ver (
+ parse_semantic_version (string (s, b, e != string::npos ? e - b : e),
+ "" /* build_separators */));
+
+ if (!ver)
+ return nullopt;
+
+ return openssl_info {move (nm), move (*ver)};
+ }
}
diff --git a/tests/openssl/driver.cxx b/tests/openssl/driver.cxx
index d671c00..55f91dd 100644
--- a/tests/openssl/driver.cxx
+++ b/tests/openssl/driver.cxx
@@ -23,12 +23,28 @@ int
main (int, const char* argv[])
try
{
- openssl os (nullfd, path ("-"), 2, path ("openssl"), "rand", 128);
+ using butl::optional;
- vector<char> r (os.in.read_binary ());
- os.in.close ();
+ // Test openssl rand command.
+ //
+ {
+ openssl os (nullfd, path ("-"), 2, path ("openssl"), "rand", 128);
- return os.wait () && r.size () == 128 ? 0 : 1;
+ vector<char> r (os.in.read_binary ());
+ os.in.close ();
+
+ assert (os.wait () && r.size () == 128);
+ }
+
+ // Test openssl info retrieval.
+ //
+ {
+ optional<openssl_info> v (openssl::info (2, path ("openssl")));
+
+ assert (v);
+ }
+
+ return 0;
}
catch (const system_error& e)
{