2 files changed, 40 insertions, 0 deletions

diff --git a/pyecsca/codegen/bn/bn.c b/pyecsca/codegen/bn/bn.c
index d3b7968..6dea91c 100644
--- a/pyecsca/codegen/bn/bn.c
+++ b/pyecsca/codegen/bn/bn.c
@@ -548,6 +548,14 @@ void bn_naf_reverse(wnaf_t *naf) {
     }
 }
 
+void bn_naf_clear(wnaf_t *naf) {
+    if (naf == NULL) {
+        return;
+    }
+    free(naf->data);
+    free(naf);
+}
+
 wsliding_t *bn_wsliding_ltr(const bn_t *bn, int w) {
     if (w > 8 || w < 2) {
 		return NULL;
@@ -679,6 +687,14 @@ exit_k:
 	return result;
 }
 
+void bn_wsliding_clear(wsliding_t *wsliding) {
+    if (wsliding == NULL) {
+        return;
+    }
+    free(wsliding->data);
+    free(wsliding);
+}
+
 small_base_t *bn_convert_base_small(const bn_t *bn, int m) {
     small_base_t *result = NULL;
 
@@ -717,6 +733,14 @@ exit_k:
     return result;
 }
 
+void bn_small_base_clear(small_base_t *sb) {
+    if (sb == NULL) {
+        return;
+    }
+    free(sb->data);
+    free(sb);
+}
+
 large_base_t *bn_convert_base_large(const bn_t *bn, const bn_t *m) {
     large_base_t *result = NULL;
 
@@ -755,4 +779,16 @@ exit_len:
     bn_clear(&k);
 exit_k:
     return result;
+}
+
+void bn_large_base_clear(large_base_t *lb) {
+    if (lb == NULL) {
+        return;
+    }
+    for (int i = 0; i < lb->length; i++) {
+        bn_clear(&lb->data[i]);
+    }
+    free(lb->data);
+    bn_clear(&lb->m);
+    free(lb);
 }
\ No newline at end of file
diff --git a/pyecsca/codegen/bn/bn.h b/pyecsca/codegen/bn/bn.h
index 78d2d94..d6a6add 100644
--- a/pyecsca/codegen/bn/bn.h
+++ b/pyecsca/codegen/bn/bn.h
@@ -143,11 +143,15 @@ void    bn_naf_pad_right(wnaf_t *naf, int8_t value, size_t amount);
 void    bn_naf_strip_left(wnaf_t *naf, int8_t value);
 void    bn_naf_strip_right(wnaf_t *naf, int8_t value);
 void    bn_naf_reverse(wnaf_t *naf);
+void    bn_naf_clear(wnaf_t *naf);
 
 wsliding_t *bn_wsliding_ltr(const bn_t *bn, int w);
 wsliding_t *bn_wsliding_rtl(const bn_t *bn, int w);
+void        bn_wsliding_clear(wsliding_t *wsliding);
 
 small_base_t *bn_convert_base_small(const bn_t *bn, int m);
+void          bn_small_base_clear(small_base_t *sb);
 large_base_t *bn_convert_base_large(const bn_t *bn, const bn_t *m);
+void          bn_large_base_clear(large_base_t *lb);
 
 #endif //BN_H_
\ No newline at end of file