diff --git a/ap/lib/libssl/openssl-1.1.1o/test/cmsapitest.c b/ap/lib/libssl/openssl-1.1.1o/test/cmsapitest.c
new file mode 100644
index 0000000..a79ae8c
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/test/cmsapitest.c
@@ -0,0 +1,93 @@
+#include <string.h>
+
+#include <openssl/cms.h>
+#include <openssl/bio.h>
+#include <openssl/x509.h>
+#include <openssl/pem.h>
+
+#include "testutil.h"
+
+static X509 *cert = NULL;
+static EVP_PKEY *privkey = NULL;
+
+static int test_encrypt_decrypt(void)
+{
+    int testresult = 0;
+    STACK_OF(X509) *certstack = sk_X509_new_null();
+    const char *msg = "Hello world";
+    BIO *msgbio = BIO_new_mem_buf(msg, strlen(msg));
+    BIO *outmsgbio = BIO_new(BIO_s_mem());
+    CMS_ContentInfo* content = NULL;
+    char buf[80];
+
+    if (!TEST_ptr(certstack) || !TEST_ptr(msgbio) || !TEST_ptr(outmsgbio))
+        goto end;
+
+    if (!TEST_int_gt(sk_X509_push(certstack, cert), 0))
+        goto end;
+
+    content = CMS_encrypt(certstack, msgbio, EVP_aes_128_cbc(), CMS_TEXT);
+    if (!TEST_ptr(content))
+        goto end;
+
+    if (!TEST_true(CMS_decrypt(content, privkey, cert, NULL, outmsgbio,
+                               CMS_TEXT)))
+        goto end;
+
+    /* Check we got the message we first started with */
+    if (!TEST_int_eq(BIO_gets(outmsgbio, buf, sizeof(buf)), strlen(msg))
+            || !TEST_int_eq(strcmp(buf, msg), 0))
+        goto end;
+
+    testresult = 1;
+ end:
+    sk_X509_free(certstack);
+    BIO_free(msgbio);
+    BIO_free(outmsgbio);
+    CMS_ContentInfo_free(content);
+
+    return testresult;
+}
+
+int setup_tests(void)
+{
+    char *certin = NULL, *privkeyin = NULL;
+    BIO *certbio = NULL, *privkeybio = NULL;
+
+    if (!TEST_ptr(certin = test_get_argument(0))
+            || !TEST_ptr(privkeyin = test_get_argument(1)))
+        return 0;
+
+    certbio = BIO_new_file(certin, "r");
+    if (!TEST_ptr(certbio))
+        return 0;
+    if (!TEST_true(PEM_read_bio_X509(certbio, &cert, NULL, NULL))) {
+        BIO_free(certbio);
+        return 0;
+    }
+    BIO_free(certbio);
+
+    privkeybio = BIO_new_file(privkeyin, "r");
+    if (!TEST_ptr(privkeybio)) {
+        X509_free(cert);
+        cert = NULL;
+        return 0;
+    }
+    if (!TEST_true(PEM_read_bio_PrivateKey(privkeybio, &privkey, NULL, NULL))) {
+        BIO_free(privkeybio);
+        X509_free(cert);
+        cert = NULL;
+        return 0;
+    }
+    BIO_free(privkeybio);
+
+    ADD_TEST(test_encrypt_decrypt);
+
+    return 1;
+}
+
+void cleanup_tests(void)
+{
+    X509_free(cert);
+    EVP_PKEY_free(privkey);
+}