mbedtls: fix build on non-linux systems

[project/ustream-ssl.git] / ustream-mbedtls.c

diff --git a/ustream-mbedtls.c b/ustream-mbedtls.c
index 1c70cac91ef1f1f59d56a2be10d7f551f9b9a600..18ffe065a5eb891603ef257b1e9493fb451ccb63 100644 (file)
--- a/ustream-mbedtls.c
+++ b/ustream-mbedtls.c
@@ -67,11 +67,17 @@ __hidden void ustream_set_io(struct ustream_ssl_ctx *ctx, void *ssl, struct ustr
 
 static int _random(void *ctx, unsigned char *out, size_t len)
 {
-       ssize_t ret;
+#ifdef linux
+       if (getrandom(out, len, 0) != (ssize_t) len)
+               return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
+#else
+       static FILE *f;
 
-       ret = getrandom(out, len, 0);
-       if (ret < 0 || (size_t)ret != len)
+       if (!f)
+               f = fopen("/dev/urandom", "r");
+       if (fread(out, len, 1, f) != 1)
                return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
+#endif
 
        return 0;
 }