From 8576e0c218634e6f7ed1b6ff02fa164fb0c75f86 Mon Sep 17 00:00:00 2001
From: Mingli Yu <mingli.yu@windriver.com>
Date: Wed, 29 Apr 2020 03:50:32 +0000
Subject: [PATCH] iputils_md5dig.h: Initialize libgcrypt

Initialize libgcrypt on first use otherwise
there comes below warning when check the status
of the ninfod.service.
 # systemctl status ninfod.service
 * ninfod.service - Respond to IPv6 Node Information Queries
 Loaded: loaded (/lib/systemd/system/ninfod.service; enabled; vendor preset: enabled)
 Active: active (running) since Wed 2020-04-29 05:18:21 UTC; 36s ago
 Docs: man:ninfod(8)
 Main PID: 347 (ninfod)
 Tasks: 1 (limit: 9382)
 Memory: 1.2M
 CGroup: /system.slice/ninfod.service
 `-347 /sbin/ninfod -d

 Apr 29 05:18:21 intel-x86-64 systemd[1]: Started Respond to IPv6 Node Information Queries.
 Apr 29 05:18:24 intel-x86-64 ninfod[347]: Libgcrypt warning: missing initialization - please fix the application

Upstream-Status: Inappropriate [the upstream avoids linking to crypto libraries in
                   commit 214ed83 common: copy md5 implementation to iputils project]

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
---
 iputils_md5dig.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/iputils_md5dig.h b/iputils_md5dig.h
index bfa7f02..3cc3fbf 100644
--- a/iputils_md5dig.h
+++ b/iputils_md5dig.h
@@ -24,8 +24,17 @@ typedef struct {
 	gcry_md_hd_t dig;
 } iputils_md5dig_ctx;
 
+void maybeInit()
+{
+	if (!gcry_control(GCRYCTL_INITIALIZATION_FINISHED_P))
+	{
+		gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
+	}
+}
+
 static void iputils_md5dig_init(iputils_md5dig_ctx *ctx)
 {
+	maybeInit();
 	if (gcry_md_open(&ctx->dig, GCRY_MD_MD5, 0) != GPG_ERR_NO_ERROR)
 		abort();
 	return;
-- 
2.24.1