Add m-esr52 at 52.6.0

1 files changed, 95 insertions, 0 deletions

diff --git a/security/nss/lib/freebl/mpi/utils/gcd.c b/security/nss/lib/freebl/mpi/utils/gcd.c
new file mode 100644
index 000000000..9f11a250b
--- /dev/null
+++ b/security/nss/lib/freebl/mpi/utils/gcd.c
@@ -0,0 +1,95 @@
+/*
+ *  gcd.c
+ *
+ *  Greatest common divisor
+ *
+ * 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 "mpi.h"
+
+char *g_prog = NULL;
+
+void print_mp_int(mp_int *mp, FILE *ofp);
+
+int
+main(int argc, char *argv[])
+{
+    mp_int a, b, x, y;
+    mp_err res;
+    int ext = 0;
+
+    g_prog = argv[0];
+
+    if (argc < 3) {
+        fprintf(stderr, "Usage: %s <a> <b>\n", g_prog);
+        return 1;
+    }
+
+    mp_init(&a);
+    mp_read_radix(&a, argv[1], 10);
+    mp_init(&b);
+    mp_read_radix(&b, argv[2], 10);
+
+    /* If we were called 'xgcd', compute x, y so that g = ax + by */
+    if (strcmp(g_prog, "xgcd") == 0) {
+        ext = 1;
+        mp_init(&x);
+        mp_init(&y);
+    }
+
+    if (ext) {
+        if ((res = mp_xgcd(&a, &b, &a, &x, &y)) != MP_OKAY) {
+            fprintf(stderr, "%s: error: %s\n", g_prog, mp_strerror(res));
+            mp_clear(&a);
+            mp_clear(&b);
+            mp_clear(&x);
+            mp_clear(&y);
+            return 1;
+        }
+    } else {
+        if ((res = mp_gcd(&a, &b, &a)) != MP_OKAY) {
+            fprintf(stderr, "%s: error: %s\n", g_prog,
+                    mp_strerror(res));
+            mp_clear(&a);
+            mp_clear(&b);
+            return 1;
+        }
+    }
+
+    print_mp_int(&a, stdout);
+    if (ext) {
+        fputs("x = ", stdout);
+        print_mp_int(&x, stdout);
+        fputs("y = ", stdout);
+        print_mp_int(&y, stdout);
+    }
+
+    mp_clear(&a);
+    mp_clear(&b);
+
+    if (ext) {
+        mp_clear(&x);
+        mp_clear(&y);
+    }
+
+    return 0;
+}
+
+void
+print_mp_int(mp_int *mp, FILE *ofp)
+{
+    char *buf;
+    int len;
+
+    len = mp_radix_size(mp, 10);
+    buf = calloc(len, sizeof(char));
+    mp_todecimal(mp, buf);
+    fprintf(ofp, "%s\n", buf);
+    free(buf);
+}