From: Felix Fietkau <nbd@nbd.name>
Date: Tue, 26 Mar 2024 18:40:51 +0000 (+0100)
Subject: mbedtls: fix build on non-linux systems
X-Git-Url: http://git.openwrt.org/?p=project%2Fustream-ssl.git;a=commitdiff_plain;h=7621339d7694abef5da5e5353ac440f2d39dcecb

mbedtls: fix build on non-linux systems

Deal with missing getrandom. Comment out linker flag.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f4dca0d..2e591ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,9 @@ ENDIF()
 ADD_DEFINITIONS(-Wno-unused-parameter -Wmissing-declarations)
 
 SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
-SET(CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined")
+IF (NOT APPLE)
+  SET(CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined")
+ENDIF()
 
 IF(MBEDTLS)
   ADD_DEFINITIONS(-DHAVE_MBEDTLS)
diff --git a/ustream-mbedtls.c b/ustream-mbedtls.c
index 1c70cac..18ffe06 100644
--- 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;
 }