add Certstore for linux

7 files changed, 385 insertions, 53 deletions

diff --git a/src/build-data/os/linux.txt b/src/build-data/os/linux.txt
index 208e13b9b..dfda7ce9f 100644
--- a/src/build-data/os/linux.txt
+++ b/src/build-data/os/linux.txt
@@ -10,6 +10,8 @@ proc_fs
 clock_gettime
 getauxval
 
+linux_certstore
+
 # not enabled by default as only available in newer kernel/glibc
 #getrandom
 
diff --git a/src/lib/x509/certstor_system_linux/certstor_linux.cpp b/src/lib/x509/certstor_system_linux/certstor_linux.cpp
new file mode 100644
index 000000000..dcd325933
--- /dev/null
+++ b/src/lib/x509/certstor_system_linux/certstor_linux.cpp
@@ -0,0 +1,18 @@
+/*
+* Certificate Store
+* (C) 1999-2019 Jack Lloyd
+* (C) 2019      Patrick Schmidt
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/build.h>
+
+#include <botan/certstor_linux.h>
+
+namespace Botan {
+Certificate_Store_Linux::Certificate_Store_Linux() :
+   Flatfile_Certificate_Store(BOTAN_LINUX_CERTSTORE_DEFAULT_FILE)
+   {
+   }
+}
diff --git a/src/lib/x509/certstor_system_linux/certstor_linux.h b/src/lib/x509/certstor_system_linux/certstor_linux.h
new file mode 100644
index 000000000..d92364da9
--- /dev/null
+++ b/src/lib/x509/certstor_system_linux/certstor_linux.h
@@ -0,0 +1,27 @@
+/*
+* Certificate Store
+* (C) 1999-2019 Jack Lloyd
+* (C) 2019      Patrick Schmidt
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_CERT_STORE_SYSTEM_LINUX_H_
+#define BOTAN_CERT_STORE_SYSTEM_LINUX_H_
+
+#include <botan/certstor_flatfile.h>
+
+namespace Botan {
+
+/**
+* Certificate Store that is backed by a file of PEMs of trusted CAs located at
+* BOTAN_LINUX_CERTSTORE_DEFAULT_FILE.
+*/
+class BOTAN_PUBLIC_API(2, 11) Certificate_Store_Linux final : public Flatfile_Certificate_Store
+   {
+   public:
+      Certificate_Store_Linux();
+   };
+}
+
+#endif
diff --git a/src/lib/x509/certstor_system_linux/info.txt b/src/lib/x509/certstor_system_linux/info.txt
new file mode 100644
index 000000000..53a82dbb6
--- /dev/null
+++ b/src/lib/x509/certstor_system_linux/info.txt
@@ -0,0 +1,16 @@
+<defines>
+CERTSTOR_LINUX -> 20190402
+</defines>
+
+<os_features>
+linux_certstore
+</os_features>
+
+<requires>
+certstor_flatfile
+</requires>
+
+<header:public>
+certstor_linux.h
+</header:public>
+
diff --git a/src/tests/test_certstor_linux.cpp b/src/tests/test_certstor_linux.cpp
new file mode 100644
index 000000000..5cd991a44
--- /dev/null
+++ b/src/tests/test_certstor_linux.cpp
@@ -0,0 +1,249 @@
+/*
+* (C) 1999-2019 Jack Lloyd
+* (C) 2019      René Meusel
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include "tests.h"
+
+#if defined(BOTAN_HAS_CERTSTOR_LINUX)
+
+#include "test_certstor_utils.h"
+#include <botan/certstor_linux.h>
+#include <botan/ber_dec.h>
+#include <botan/der_enc.h>
+#include <botan/hex.h>
+
+namespace Botan_Tests {
+
+namespace {
+
+Test::Result open_certificate_store()
+   {
+   Test::Result result("linux Certificate Store - Open Store");
+
+   try
+      {
+      result.start_timer();
+      Botan::Certificate_Store_Linux unused;
+      result.end_timer();
+      result.test_gt("found some certificates", unused.all_subjects().size(), 0);
+      }
+   catch(std::exception& e)
+      {
+      result.test_failure(e.what());
+      }
+
+   result.test_success();
+
+   return result;
+   }
+
+Test::Result find_certificate_by_pubkey_sha1()
+   {
+   Test::Result result("linux Certificate Store - Find Certificate by SHA1(pubkey)");
+
+   try
+      {
+      result.start_timer();
+      Botan::Certificate_Store_Linux certstore;
+      auto cert = certstore.find_cert_by_pubkey_sha1(get_key_id());
+      result.end_timer();
+
+      if(result.test_not_null("found certificate", cert.get()))
+         {
+         auto cns = cert->subject_dn().get_attribute("CN");
+         result.test_is_eq("exactly one CN", cns.size(), 1ul);
+         result.test_eq("CN", cns.front(), "DST Root CA X3");
+         }
+      }
+   catch(std::exception& e)
+      {
+      result.test_failure(e.what());
+      }
+
+   result.test_throws("on invalid SHA1 hash data", [&]
+      {
+      Botan::Certificate_Store_Linux certstore;
+      certstore.find_cert_by_pubkey_sha1({});
+      });
+
+   return result;
+   }
+
+Test::Result find_cert_by_subject_dn()
+   {
+   Test::Result result("linux Certificate Store - Find Certificate by subject DN");
+
+   try
+      {
+      auto dn = get_dn();
+
+      result.start_timer();
+      Botan::Certificate_Store_Linux certstore;
+      auto cert = certstore.find_cert(dn, std::vector<uint8_t>());
+      result.end_timer();
+
+      if(result.test_not_null("found certificate", cert.get()))
+         {
+         auto cns = cert->subject_dn().get_attribute("CN");
+         result.test_is_eq("exactly one CN", cns.size(), 1ul);
+         result.test_eq("CN", cns.front(), "DST Root CA X3");
+         }
+      }
+   catch(std::exception& e)
+      {
+      result.test_failure(e.what());
+      }
+
+   return result;
+   }
+
+Test::Result find_cert_by_subject_dn_and_key_id()
+   {
+   Test::Result result("linux Certificate Store - Find Certificate by subject DN and key ID");
+
+   try
+      {
+      auto dn = get_dn();
+
+      result.start_timer();
+      Botan::Certificate_Store_Linux certstore;
+      auto cert = certstore.find_cert(dn, get_key_id());
+      result.end_timer();
+
+      if(result.test_not_null("found certificate", cert.get()))
+         {
+         auto cns = cert->subject_dn().get_attribute("CN");
+         result.test_is_eq("exactly one CN", cns.size(), 1ul);
+         result.test_eq("CN", cns.front(), "DST Root CA X3");
+         }
+      }
+   catch(std::exception& e)
+      {
+      result.test_failure(e.what());
+      }
+
+   return result;
+   }
+
+Test::Result find_certs_by_subject_dn_and_key_id()
+   {
+   Test::Result result("linux Certificate Store - Find Certificates by subject DN and key ID");
+
+   try
+      {
+      auto dn = get_dn();
+
+      result.start_timer();
+      Botan::Certificate_Store_Linux certstore;
+      auto certs = certstore.find_all_certs(dn, get_key_id());
+      result.end_timer();
+
+      if(result.confirm("result not empty", !certs.empty()) &&
+            result.test_eq("exactly one certificate", certs.size(), 1))
+         {
+         auto cns = certs.front()->subject_dn().get_attribute("CN");
+         result.test_is_eq("exactly one CN", cns.size(), 1ul);
+         result.test_eq("CN", cns.front(), "DST Root CA X3");
+         }
+      }
+   catch(std::exception& e)
+      {
+      result.test_failure(e.what());
+      }
+
+   return result;
+   }
+
+Test::Result find_all_subjects()
+   {
+   Test::Result result("linux Certificate Store - Find all Certificate Subjects");
+
+   try
+      {
+      result.start_timer();
+      Botan::Certificate_Store_Linux certstore;
+      auto subjects = certstore.all_subjects();
+      result.end_timer();
+
+      if(result.confirm("result not empty", !subjects.empty()))
+         {
+         auto dn = get_dn();
+         auto needle = std::find_if(subjects.cbegin(),
+                                    subjects.cend(),
+                                    [=](const Botan::X509_DN &subject)
+            {
+            return subject == dn;
+            });
+
+         if(result.confirm("found expected certificate", needle != subjects.end()))
+            {
+            result.confirm("expected certificate", *needle == dn);
+            }
+         }
+      }
+   catch(std::exception& e)
+      {
+      result.test_failure(e.what());
+      }
+
+   return result;
+   }
+
+Test::Result no_certificate_matches()
+   {
+   Test::Result result("linux Certificate Store - can deal with no matches (regression test)");
+
+   try
+      {
+      auto dn  = get_unknown_dn();
+      auto kid = get_unknown_key_id();
+
+      result.start_timer();
+      Botan::Certificate_Store_Linux certstore;
+
+      auto certs = certstore.find_all_certs(dn, kid);
+      auto cert = certstore.find_cert(dn, kid);
+      auto pubk_cert = certstore.find_cert_by_pubkey_sha1(kid);
+      result.end_timer();
+
+      result.confirm("find_all_certs did not find the dummy", certs.empty());
+      result.confirm("find_cert did not find the dummy", !cert);
+      result.confirm("find_cert_by_pubkey_sha1 did not find the dummy", !pubk_cert);
+      }
+   catch(std::exception& e)
+      {
+      result.test_failure(e.what());
+      }
+
+   return result;
+   }
+
+class Certstor_Linux_Tests final : public Test
+   {
+   public:
+      std::vector<Test::Result> run() override
+         {
+         std::vector<Test::Result> results;
+
+         results.push_back(open_certificate_store());
+         results.push_back(find_certificate_by_pubkey_sha1());
+         results.push_back(find_cert_by_subject_dn());
+         results.push_back(find_cert_by_subject_dn_and_key_id());
+         results.push_back(find_certs_by_subject_dn_and_key_id());
+         results.push_back(find_all_subjects());
+         results.push_back(no_certificate_matches());
+
+         return results;
+         }
+   };
+
+BOTAN_REGISTER_TEST("certstor_linux", Certstor_Linux_Tests);
+
+}
+
+}
+
+#endif
diff --git a/src/tests/test_certstor_macos.cpp b/src/tests/test_certstor_macos.cpp
index 243a150da..a21fd2a32 100644
--- a/src/tests/test_certstor_macos.cpp
+++ b/src/tests/test_certstor_macos.cpp
@@ -9,6 +9,7 @@
 
 #if defined(BOTAN_HAS_CERTSTOR_MACOS)
 
+#include "test_certstor_utils.h"
 #include <botan/certstor_macos.h>
 #include <botan/ber_dec.h>
 #include <botan/der_enc.h>
@@ -18,59 +19,6 @@ namespace Botan_Tests {
 
 namespace {
 
-Botan::X509_DN read_dn(const std::string hex)
-   {
-   Botan::X509_DN dn;
-   Botan::BER_Decoder decoder(Botan::hex_decode(hex));
-   dn.decode_from(decoder);
-   return dn;
-   }
-
-Botan::X509_DN get_dn()
-   {
-   // Public key fingerprint of "DST Root CA X3"
-   // This certificate is in the standard "System Roots" of any macOS setup,
-   // serves as the trust root of botan.randombit.net and expires on
-   // Thursday, 30. September 2021 at 16:01:15 Central European Summer Time
-   return read_dn("303f31243022060355040a131b4469676974616c205369676e6174757265"
-                  "20547275737420436f2e311730150603550403130e44535420526f6f7420"
-                  "4341205833");
-   }
-
-std::vector<uint8_t> get_key_id()
-   {
-   // this is the same as the public key SHA1
-   return Botan::hex_decode("c4a7b1a47b2c71fadbe14b9075ffc41560858910");
-   }
-
-Botan::X509_DN get_unknown_dn()
-   {
-   // thats a D-Trust "Test Certificate". It should be fairly likely that
-   // _nobody_ will _ever_ have that in their system keychain
-   // CN: D-TRUST Limited Basic Test PU CA 1-4 2016
-   return read_dn("305b310b300906035504061302444531153013060355040a0c0c442d5472"
-                  "75737420476d62483135303306035504030c2c442d5452555354204c696d"
-                  "6974656420426173696320526f6f74205465737420505520434120312032"
-                  "303135");
-   }
-
-Botan::X509_DN get_skewed_dn()
-   {
-   // This DN contains ASN.1 PrintableString fields that are not 'normalized'
-   // according to Apple's idea of a normalized PrintableString field:
-   //   (1) It has leading and trailing white space
-   //   (2) It contains multiple spaces between 'words'
-   return read_dn("304b312a3028060355040a132120204469676974616c2020205369676e61"
-                  "7475726520547275737420436f2e2020311d301b06035504031314202044"
-                  "5354202020526f6f742043412058332020");
-   }
-
-std::vector<uint8_t> get_unknown_key_id()
-   {
-   // this is the same as the public key SHA1
-   return Botan::hex_decode("785c0b67b536eeacbb2b27cf9123301abe7ab09a");
-   }
-
 Test::Result open_certificate_store()
    {
    Test::Result result("macOS Certificate Store - Open Keychain");
diff --git a/src/tests/test_certstor_utils.h b/src/tests/test_certstor_utils.h
new file mode 100644
index 000000000..66119519a
--- /dev/null
+++ b/src/tests/test_certstor_utils.h
@@ -0,0 +1,72 @@
+/*
+* (C) 1999-2019 Jack Lloyd
+* (C) 2019      René Meusel
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_TEST_CERT_STORE_UTILS_H_
+#define BOTAN_TEST_CERT_STORE_UTILS_H_
+
+#include <botan/ber_dec.h>
+#include <botan/der_enc.h>
+#include <botan/hex.h>
+#include <botan/x509_dn.h>
+
+namespace Botan_Tests {
+
+Botan::X509_DN read_dn(const std::string hex)
+   {
+   Botan::X509_DN dn;
+   Botan::BER_Decoder decoder(Botan::hex_decode(hex));
+   dn.decode_from(decoder);
+   return dn;
+   }
+
+Botan::X509_DN get_dn()
+   {
+   // Public key fingerprint of "DST Root CA X3"
+   // This certificate is in the standard "System Roots" of any macOS setup,
+   // serves as the trust root of botan.randombit.net and expires on
+   // Thursday, 30. September 2021 at 16:01:15 Central European Summer Time
+   return read_dn("303f31243022060355040a131b4469676974616c205369676e6174757265"
+                  "20547275737420436f2e311730150603550403130e44535420526f6f7420"
+                  "4341205833");
+   }
+
+std::vector<uint8_t> get_key_id()
+   {
+   // this is the same as the public key SHA1
+   return Botan::hex_decode("c4a7b1a47b2c71fadbe14b9075ffc41560858910");
+   }
+
+Botan::X509_DN get_unknown_dn()
+   {
+   // thats a D-Trust "Test Certificate". It should be fairly likely that
+   // _nobody_ will _ever_ have that in their system keychain
+   // CN: D-TRUST Limited Basic Test PU CA 1-4 2016
+   return read_dn("305b310b300906035504061302444531153013060355040a0c0c442d5472"
+                  "75737420476d62483135303306035504030c2c442d5452555354204c696d"
+                  "6974656420426173696320526f6f74205465737420505520434120312032"
+                  "303135");
+   }
+
+Botan::X509_DN get_skewed_dn()
+   {
+   // This DN contains ASN.1 PrintableString fields that are not 'normalized'
+   // according to Apple's idea of a normalized PrintableString field:
+   //   (1) It has leading and trailing white space
+   //   (2) It contains multiple spaces between 'words'
+   return read_dn("304b312a3028060355040a132120204469676974616c2020205369676e61"
+                  "7475726520547275737420436f2e2020311d301b06035504031314202044"
+                  "5354202020526f6f742043412058332020");
+   }
+
+std::vector<uint8_t> get_unknown_key_id()
+   {
+   // this is the same as the public key SHA1
+   return Botan::hex_decode("785c0b67b536eeacbb2b27cf9123301abe7ab09a");
+   }
+}
+#endif
+