Wipe (some) secrets from memory after use

[tinc] / src / chacha-poly1305 / chacha-poly1305.c

diff --git a/src/chacha-poly1305/chacha-poly1305.c b/src/chacha-poly1305/chacha-poly1305.c
index d13fec4..77d531a 100644 (file)
--- a/src/chacha-poly1305/chacha-poly1305.c
+++ b/src/chacha-poly1305/chacha-poly1305.c
@@ -10,16 +10,14 @@ struct chacha_poly1305_ctx {
 };
 
 chacha_poly1305_ctx_t *chacha_poly1305_init(void) {
-       chacha_poly1305_ctx_t *ctx = xzalloc(sizeof(*ctx));
-       return ctx;
+       return xzalloc(sizeof(chacha_poly1305_ctx_t));
 }
 
 void chacha_poly1305_exit(chacha_poly1305_ctx_t *ctx) {
-       free(ctx);
+       xzfree(ctx, sizeof(chacha_poly1305_ctx_t));
 }
 
-bool chacha_poly1305_set_key(chacha_poly1305_ctx_t *ctx, const void *vkey) {
-       const uint8_t *key = vkey;
+bool chacha_poly1305_set_key(chacha_poly1305_ctx_t *ctx, const uint8_t *key) {
        chacha_keysetup(&ctx->main_ctx, key, 256);
        chacha_keysetup(&ctx->header_ctx, key + 32, 256);
        return true;