1 files changed, 111 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/tests/mptest-4.c b/security/nss/lib/freebl/mpi/tests/mptest-4.c
new file mode 100644
index 000000000..0f326ac2c
--- /dev/null
+++ b/security/nss/lib/freebl/mpi/tests/mptest-4.c
@@ -0,0 +1,111 @@
+/*
+ * Simple test driver for MPI library
+ *
+ * Test 4: Modular arithmetic tests
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+
+#include "mpi.h"
+
+int
+main(int argc, char *argv[])
+{
+    int ix;
+    mp_int a, b, c, m;
+    mp_digit r;
+
+    if (argc < 4) {
+        fprintf(stderr, "Usage: %s <a> <b> <m>\n", argv[0]);
+        return 1;
+    }
+
+    printf("Test 4: Modular arithmetic\n\n");
+
+    mp_init(&a);
+    mp_init(&b);
+    mp_init(&m);
+
+    mp_read_radix(&a, argv[1], 10);
+    mp_read_radix(&b, argv[2], 10);
+    mp_read_radix(&m, argv[3], 10);
+    printf("a = ");
+    mp_print(&a, stdout);
+    fputc('\n', stdout);
+    printf("b = ");
+    mp_print(&b, stdout);
+    fputc('\n', stdout);
+    printf("m = ");
+    mp_print(&m, stdout);
+    fputc('\n', stdout);
+
+    mp_init(&c);
+    printf("\nc = a (mod m)\n");
+
+    mp_mod(&a, &m, &c);
+    printf("c = ");
+    mp_print(&c, stdout);
+    fputc('\n', stdout);
+
+    printf("\nc = b (mod m)\n");
+
+    mp_mod(&b, &m, &c);
+    printf("c = ");
+    mp_print(&c, stdout);
+    fputc('\n', stdout);
+
+    printf("\nc = b (mod 1853)\n");
+
+    mp_mod_d(&b, 1853, &r);
+    printf("c = %04X\n", r);
+
+    printf("\nc = (a + b) mod m\n");
+
+    mp_addmod(&a, &b, &m, &c);
+    printf("c = ");
+    mp_print(&c, stdout);
+    fputc('\n', stdout);
+
+    printf("\nc = (a - b) mod m\n");
+
+    mp_submod(&a, &b, &m, &c);
+    printf("c = ");
+    mp_print(&c, stdout);
+    fputc('\n', stdout);
+
+    printf("\nc = (a * b) mod m\n");
+
+    mp_mulmod(&a, &b, &m, &c);
+    printf("c = ");
+    mp_print(&c, stdout);
+    fputc('\n', stdout);
+
+    printf("\nc = (a ** b) mod m\n");
+
+    mp_exptmod(&a, &b, &m, &c);
+    printf("c = ");
+    mp_print(&c, stdout);
+    fputc('\n', stdout);
+
+    printf("\nIn-place modular squaring test:\n");
+    for (ix = 0; ix < 5; ix++) {
+        printf("a = (a * a) mod m   a = ");
+        mp_sqrmod(&a, &m, &a);
+        mp_print(&a, stdout);
+        fputc('\n', stdout);
+    }
+
+    mp_clear(&c);
+    mp_clear(&m);
+    mp_clear(&b);
+    mp_clear(&a);
+
+    return 0;
+}