1 files changed, 48 insertions, 0 deletions
diff --git a/src/tests/data/test_validate_key_material/readme.txt b/src/tests/data/test_validate_key_material/readme.txt
new file mode 100644
index 0000000..cf14e06
--- /dev/null
+++ b/src/tests/data/test_validate_key_material/readme.txt
@@ -0,0 +1,48 @@
+Some of ElGamal samples were generated by using the following custom key generation snippet:
+
+{
+    std::unique_ptr<Botan::RandomNumberGenerator> rng;
+    rng.reset(new Botan::System_RNG);
+
+    Botan::BigInt p = Botan::random_prime(*rng, keybits, 0, 2, 3, 64);
+    Botan::BigInt p1(p - 1);
+    Botan::BigInt sg = 1;
+    Botan::BigInt g;
+
+    size_t mod = 2;
+    while (mod < 65536) {
+        if (p1 % mod == 0) {
+            if (sg * mod > (1 << 16)) {
+                break;
+            }
+            RNP_LOG("Reduced by %zu", mod);
+            p1 = p1 / mod;
+            sg *= mod;
+            continue;
+        }
+        mod++;
+    }
+    if (Botan::power_mod(3, p - 1, p).cmp_word(1) != 0) {
+        RNP_LOG("3 ^ (p - 1) != 1 (mod p)");
+        goto end;
+    }
+    Botan::BigInt ng = Botan::power_mod(3, p1, p);
+    if (Botan::power_mod(ng, sg, p).cmp_word(1) != 0) {
+        RNP_LOG("ng ^ sg != 1 (mod p)");
+        goto end;
+    }
+    g = ng;
+
+    Botan::BigInt x(*rng, keybits, true);
+    Botan::BigInt y = Botan::power_mod(g, x, p);
+
+    key->p.len = p.bytes();
+    p.binary_encode(key->p.mpi);
+    key->g.len = g.bytes();
+    g.binary_encode(key->g.mpi);
+    key->x.len = x.bytes();
+    x.binary_encode(key->x.mpi);
+    key->y.len = y.bytes();
+    y.binary_encode(key->y.mpi);
+    ret = RNP_SUCCESS;
+}