Add ECDH via OpenSSL

Expose provider param in PK_Key_Agreement API

Handle multiple providers in key agreement tests

Fix some funky formatting of P-521 EC points in ecdh.vec which was
being rejected by OpenSSL; for whatever reason the CAVS file had
the affine coords with far more leading zeros than necessary.

1 files changed, 16 insertions, 3 deletions

diff --git a/src/tests/test_pubkey.cpp b/src/tests/test_pubkey.cpp
index dc5cd4145..faa27f322 100644
--- a/src/tests/test_pubkey.cpp
+++ b/src/tests/test_pubkey.cpp
@@ -294,16 +294,29 @@ Test::Result PK_Key_Agreement_Test::run_one_test(const std::string& header, cons
    const std::vector<uint8_t> shared = get_req_bin(vars, "K");
    const std::string kdf = get_opt_str(vars, "KDF", default_kdf(vars));
 
-   Test::Result result(algo_name() + "/" + kdf + " key agreement");
+   Test::Result result(algo_name() + "/" + kdf +
+                       (header.empty() ? header : " " + header) +
+                       " key agreement");
 
    std::unique_ptr<Botan::Private_Key> privkey = load_our_key(header, vars);
    const std::vector<uint8_t> pubkey = load_their_key(header, vars);
 
    const size_t key_len = get_opt_sz(vars, "OutLen", 0);
 
-   Botan::PK_Key_Agreement kas(*privkey, kdf);
+   for(auto&& provider : possible_pk_providers())
+      {
+      std::unique_ptr<Botan::PK_Key_Agreement> kas;
 
-   result.test_eq("agreement", kas.derive_key(key_len, pubkey).bits_of(), shared);
+      try
+         {
+         kas.reset(new Botan::PK_Key_Agreement(*privkey, kdf, provider));
+         result.test_eq(provider, "agreement", kas->derive_key(key_len, pubkey).bits_of(), shared);
+         }
+      catch(Botan::Lookup_Error&)
+         {
+         //result.test_note("Skipping key agreement with with " + provider);
+         }
+      }
 
    return result;
    }