From: Guillaume Solignac <gsoligna@cisco.com>
Date: Wed, 13 Apr 2022 13:52:05 +0000 (+0200)
Subject: crypto-openssl: use getrandom syscall
X-Git-Tag: v22.10-rc0~91
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F54%2F35954%2F2;p=vpp.git

crypto-openssl: use getrandom syscall

The sys/random.h header, which provides the getrandom syscall wrapper,
was only added in glibc2.25. To make it compatible with older version,
we can directly call the syscall.

Type: improvement
Signed-off-by: Guillaume Solignac <gsoligna@cisco.com>
Change-Id: I93c5f8a49c0323511a4e34273f0b3c0e24663bfd
---

diff --git a/src/plugins/crypto_openssl/main.c b/src/plugins/crypto_openssl/main.c
index 6843880eed0..c0f7ee206e1 100644
--- a/src/plugins/crypto_openssl/main.c
+++ b/src/plugins/crypto_openssl/main.c
@@ -15,7 +15,7 @@
  *------------------------------------------------------------------
  */
 
-#include <sys/random.h>
+#include <sys/syscall.h>
 
 #include <openssl/evp.h>
 #include <openssl/hmac.h>
@@ -478,7 +478,7 @@ crypto_openssl_init (vlib_main_t * vm)
   openssl_per_thread_data_t *ptd;
   u8 seed[32];
 
-  if (getrandom (&seed, sizeof (seed), 0) != sizeof (seed))
+  if (syscall (SYS_getrandom, &seed, sizeof (seed), 0) != sizeof (seed))
     return clib_error_return_unix (0, "getrandom() failed");
 
   RAND_seed (seed, sizeof (seed));