Add sliding window recoding functions.

2 files changed, 59 insertions, 0 deletions

diff --git a/test/Makefile b/test/Makefile
new file mode 100644
index 0000000..4b8fc78
--- /dev/null
+++ b/test/Makefile
@@ -0,0 +1,3 @@
+
+test_bn: test_bn.c ../pyecsca/codegen/bn/bn.c
+	gcc -o $@ $^ -I ../pyecsca/codegen/ -I ../pyecsca/codegen/tommath/ -L ../pyecsca/codegen/tommath/ -l:libtommath-HOST.a
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diff --git a/test/test_bn.c b/test/test_bn.c
new file mode 100644
index 0000000..a77fe9a
--- /dev/null
+++ b/test/test_bn.c
@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include "bn/bn.h"
+
+int test_wsliding_ltr() {
+    printf("test_wsliding_ltr: ");
+    bn_t bn;
+    bn_init(&bn);
+    bn_from_int(181, &bn);
+    wsliding_t *ws = bn_wsliding_ltr(&bn, 3);
+    if (ws == NULL) {
+        printf("NULL\n");
+        return 1;
+    }
+    if (ws->length != 6) {
+        printf("Bad length (%li instead of 6)\n", ws->length);
+        return 1;
+    }
+    uint8_t expected[6] = {5, 0, 0, 5, 0, 1};
+    for (int i = 0; i < 6; i++) {
+        if (ws->data[i] != expected[i]) {
+            printf("Bad data (%i instead of %i)\n", ws->data[i], expected[i]);
+            return 1;
+        }
+    }
+    printf("OK\n");
+    return 0;
+}
+
+int test_wsliding_rtl() {
+    printf("test_wsliding_rtl: ");
+    bn_t bn;
+    bn_init(&bn);
+    bn_from_int(181, &bn);
+    wsliding_t *ws = bn_wsliding_rtl(&bn, 3);
+    if (ws == NULL) {
+        printf("NULL\n");
+        return 1;
+    }
+    if (ws->length != 8) {
+        printf("Bad length (%li instead of 8)\n", ws->length);
+        return 1;
+    }
+    uint8_t expected[8] = {1, 0, 0, 3, 0, 0, 0, 5};
+    for (int i = 0; i < 8; i++) {
+        if (ws->data[i] != expected[i]) {
+            printf("Bad data (%i instead of %i)\n", ws->data[i], expected[i]);
+            return 1;
+        }
+    }
+    printf("OK\n");
+    return 0;
+}
+
+int main(void) {
+    return test_wsliding_ltr() + test_wsliding_rtl();
+}
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