1 files changed, 135 insertions, 0 deletions

diff --git a/src/regress/lib/libcrypto/mlkem/mlkem768_encap_tests.c b/src/regress/lib/libcrypto/mlkem/mlkem768_encap_tests.c
new file mode 100644
index 0000000000..2f6ad896c6
--- /dev/null
+++ b/src/regress/lib/libcrypto/mlkem/mlkem768_encap_tests.c
@@ -0,0 +1,135 @@
+/* Copyright (c) 2024, Google Inc.
+ * Copyright (c) 2024, Bob Beck <beck@obtuse.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <err.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <openssl/evp.h>
+
+#include "bytestring.h"
+#include "mlkem.h"
+#include "mlkem_internal.h"
+#include "sha3_internal.h"
+#include "mlkem_tests_util.h"
+
+static void
+MlkemEncapFileTest(CBS *entropy, CBS *public_key, CBS *expected_ciphertext,
+    CBS *expected_shared_secret, int should_fail)
+{
+        uint8_t shared_secret[MLKEM_SHARED_SECRET_BYTES];
+        uint8_t ciphertext[MLKEM768_CIPHERTEXT_BYTES];
+        struct MLKEM768_public_key pub;
+        int parse_ok;
+
+        parse_ok = MLKEM768_parse_public_key(&pub, public_key);
+        if (!parse_ok) {
+                TEST(!should_fail, "parse_public_key");
+                return;
+        }
+        MLKEM768_encap(ciphertext, shared_secret, &pub);
+        TEST_DATAEQ(shared_secret, CBS_data(expected_shared_secret),
+            MLKEM_SHARED_SECRET_BYTES, "shared_secret");
+        TEST_DATAEQ(ciphertext, CBS_data(expected_ciphertext),
+            MLKEM768_CIPHERTEXT_BYTES, "shared_secret");
+}
+
+#define S_START 0
+#define S_COMMENT 1
+#define S_ENTROPY 2
+#define S_PUBLIC_KEY 3
+#define S_RESULT 4
+#define S_CIPHERTEXT 5
+#define S_SHARED_SECRET  6
+
+int
+main(int argc, char **argv)
+{
+        CBS entropy, public_key, ciphertext, shared_secret;
+        const uint8_t *p = NULL;
+        int should_fail = 0;
+        char *buf;
+        FILE *fp;
+        int state;
+
+        fprintf(stderr, "Testing encap test vectors in %s\n", argv[1]);
+        TEST((fp = fopen(argv[1], "r")) == NULL, "can't open test file");
+        MALLOC(buf, 16*1024);
+        state = S_COMMENT;
+        test_number = 1;
+        while (fgets(buf, 16*1024, fp) != NULL) {
+                switch (state) {
+                case S_START:
+                        if (strcmp(buf, "\n") != 0)
+                                break;
+                        state = S_COMMENT;
+                        break;
+                case S_COMMENT:
+                        if (strncmp(buf, "#", 1) != 0)
+                                break;
+                        state = S_ENTROPY;
+                        break;
+                case S_ENTROPY:
+                        if (strncmp(buf, "entropy: ", strlen("entropy: ")) != 0)
+                                break;
+                        grab_data(&entropy, buf, strlen("entropy: "));
+                        p = CBS_data(&entropy);
+                        state = S_PUBLIC_KEY;
+                        break;
+                case S_PUBLIC_KEY:
+                        if (strncmp(buf, "public_key: ",
+                            strlen("public_key: ")) != 0)
+                                break;
+                        grab_data(&public_key, buf, strlen("public_key: "));
+                        p = CBS_data(&public_key);
+                        state = S_RESULT;
+                        break;
+                case S_RESULT:
+                        if (strncmp(buf, "result: pass",
+                            strlen("result: pass")) != 0)
+                                should_fail = 1;
+                        else
+                                should_fail = 0;
+                        state = S_CIPHERTEXT;
+                        break;
+                case S_CIPHERTEXT:
+                        if (strncmp(buf, "ciphertext: ",
+                            strlen("ciphertext: ")) != 0)
+                                break;
+                        grab_data(&ciphertext, buf, strlen("ciphertext: "));
+                        state = S_RESULT;
+                        break;
+                case S_SHARED_SECRET:
+                        if (strncmp(buf, "shared_secret: ",
+                            strlen("shared_secret: ")) != 0)
+                                break;
+                        grab_data(&shared_secret, buf,
+                            strlen("shared_secret: "));
+                        MlkemEncapFileTest(&entropy, &public_key, &ciphertext,
+                            &shared_secret, should_fail);
+                        free((void *)CBS_data(&ciphertext));
+                        free((void *)CBS_data(&shared_secret));
+                        free((void *)p);
+
+                        test_number++;
+                        state = S_START;
+                        break;
+                }
+        }
+
+        free(buf);
+        exit(failure);
+}