1 files changed, 62 insertions, 0 deletions
diff --git a/test/rand_test.c b/test/rand_test.c
new file mode 100644
index 000000000000..7d7af4c6bf40
--- /dev/null
+++ b/test/rand_test.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2021-2025 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the >License>).  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/evp.h>
+#include <openssl/rand.h>
+#include <openssl/bio.h>
+#include <openssl/core_names.h>
+#include "testutil.h"
+
+static int test_rand(void)
+{
+    EVP_RAND_CTX *privctx;
+    OSSL_PARAM params[2], *p = params;
+    unsigned char entropy1[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
+    unsigned char entropy2[] = { 0xff, 0xfe, 0xfd };
+    unsigned char nonce[] = { 0x00, 0x01, 0x02, 0x03, 0x04 };
+    unsigned char outbuf[3];
+
+    *p++ = OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
+                                             entropy1, sizeof(entropy1));
+    *p = OSSL_PARAM_construct_end();
+
+    if (!TEST_ptr(privctx = RAND_get0_private(NULL))
+            || !TEST_true(EVP_RAND_CTX_set_params(privctx, params))
+            || !TEST_int_gt(RAND_priv_bytes(outbuf, sizeof(outbuf)), 0)
+            || !TEST_mem_eq(outbuf, sizeof(outbuf), entropy1, sizeof(outbuf))
+            || !TEST_int_le(RAND_priv_bytes(outbuf, sizeof(outbuf) + 1), 0)
+            || !TEST_int_gt(RAND_priv_bytes(outbuf, sizeof(outbuf)), 0)
+            || !TEST_mem_eq(outbuf, sizeof(outbuf),
+                            entropy1 + sizeof(outbuf), sizeof(outbuf)))
+        return 0;
+
+    *params = OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
+                                                entropy2, sizeof(entropy2));
+    if (!TEST_true(EVP_RAND_CTX_set_params(privctx, params))
+            || !TEST_int_gt(RAND_priv_bytes(outbuf, sizeof(outbuf)), 0)
+            || !TEST_mem_eq(outbuf, sizeof(outbuf), entropy2, sizeof(outbuf)))
+        return 0;
+
+    *params = OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_NONCE,
+                                                nonce, sizeof(nonce));
+    if (!TEST_true(EVP_RAND_CTX_set_params(privctx, params))
+            || !TEST_true(EVP_RAND_nonce(privctx, outbuf, sizeof(outbuf)))
+            || !TEST_mem_eq(outbuf, sizeof(outbuf), nonce, sizeof(outbuf)))
+        return 0;
+
+    return 1;
+}
+
+int setup_tests(void)
+{
+    if (!TEST_true(RAND_set_DRBG_type(NULL, "TEST-RAND", NULL, NULL, NULL)))
+        return 0;
+    ADD_TEST(test_rand);
+    return 1;
+}