[source] uhttpd: use sha256 when generating certificates with openssl (FS#512)

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/7df998bb6d0830e9cc9506036bebf4c73ecb032d

commit 7df998bb6d0830e9cc9506036bebf4c73ecb032d
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Fri Feb 17 14:21:47 2017 +0100

    uhttpd: use sha256 when generating certificates with openssl (FS#512)
    
    Patch from attachment to FS#512
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/network/services/uhttpd/files/uhttpd.init | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/network/services/uhttpd/files/uhttpd.init b/package/network/services/uhttpd/files/uhttpd.init
index 53bf04c..6b8be1c 100755
--- a/package/network/services/uhttpd/files/uhttpd.init
+++ b/package/network/services/uhttpd/files/uhttpd.init
@@ -47,7 +47,7 @@ generate_keys() {
 	# Prefer px5g for certificate generation (existence evaluated last)
 	local GENKEY_CMD=""
 	local UNIQUEID=$(dd if=/dev/urandom bs=1 count=4 | hexdump -e '1/1 "%02x"')
-	[ -x "$OPENSSL_BIN" ] && GENKEY_CMD="$OPENSSL_BIN req -x509 -outform der -nodes"
+	[ -x "$OPENSSL_BIN" ] && GENKEY_CMD="$OPENSSL_BIN req -x509 -sha256 -outform der -nodes"
 	[ -x "$PX5G_BIN" ] && GENKEY_CMD="$PX5G_BIN selfsigned -der"
 	[ -n "$GENKEY_CMD" ] && {
 		$GENKEY_CMD \