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From 831dca008699d485f2c8e91749657ef2d0b06166 Mon Sep 17 00:00:00 2001
From: Martin Schiller <ms@dev.tdt.de>
Date: Thu, 6 Dec 2018 08:43:17 +0100
Subject: [PATCH] Revert "pppd: Use openssl for the DES instead of the libcrypt
 / glibc"

For musl and glibc2.27 we can keep linking to crypt; however if we
switch to glibc 2.28 we will have to link to one of the SSL libraries.

This reverts commit 3c7b86229f7bd2600d74db14b1fe5b3896be3875.
---
 pppd/Makefile.linux |  7 +++----
 pppd/pppcrypt.c     | 18 +++++++++---------
 2 files changed, 12 insertions(+), 13 deletions(-)

--- a/pppd/Makefile.linux
+++ b/pppd/Makefile.linux
@@ -35,10 +35,10 @@ endif
 COPTS = -O2 -pipe -Wall -g
 LIBS =
 
-# Uncomment the next line to include support for Microsoft's
+# Uncomment the next 2 lines to include support for Microsoft's
 # MS-CHAP authentication protocol.  Also, edit plugins/radius/Makefile.linux.
 CHAPMS=y
-#USE_CRYPT=y
+USE_CRYPT=y
 # Don't use MSLANMAN unless you really know what you're doing.
 #MSLANMAN=y
 # Uncomment the next line to include support for MPPE.  CHAPMS (above) must
@@ -140,8 +140,7 @@ endif
 
 ifdef NEEDDES
 ifndef USE_CRYPT
-CFLAGS   += -I$(shell $CC --print-sysroot)/usr/include/openssl
-LIBS     += -lcrypto
+LIBS     += -ldes $(LIBS)
 else
 CFLAGS   += -DUSE_CRYPT=1
 endif
--- a/pppd/pppcrypt.c
+++ b/pppd/pppcrypt.c
@@ -64,7 +64,7 @@ u_char *des_key;	/* OUT 64 bit DES key w
 	des_key[7] = Get7Bits(key, 49);
 
 #ifndef USE_CRYPT
-	DES_set_odd_parity((DES_cblock *)des_key);
+	des_set_odd_parity((des_cblock *)des_key);
 #endif
 }
 
@@ -158,25 +158,25 @@ u_char *clear;	/* OUT 8 octets */
 }
 
 #else /* USE_CRYPT */
-static DES_key_schedule	key_schedule;
+static des_key_schedule	key_schedule;
 
 bool
 DesSetkey(key)
 u_char *key;
 {
-	DES_cblock des_key;
+	des_cblock des_key;
 	MakeKey(key, des_key);
-	DES_set_key(&des_key, &key_schedule);
+	des_set_key(&des_key, key_schedule);
 	return (1);
 }
 
 bool
-DesEncrypt(clear, cipher)
+DesEncrypt(clear, key, cipher)
 u_char *clear;	/* IN  8 octets */
 u_char *cipher;	/* OUT 8 octets */
 {
-	DES_ecb_encrypt((DES_cblock *)clear, (DES_cblock *)cipher,
-	    &key_schedule, 1);
+	des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher,
+	    key_schedule, 1);
 	return (1);
 }
 
@@ -185,8 +185,8 @@ DesDecrypt(cipher, clear)
 u_char *cipher;	/* IN  8 octets */
 u_char *clear;	/* OUT 8 octets */
 {
-	DES_ecb_encrypt((DES_cblock *)cipher, (DES_cblock *)clear,
-	    &key_schedule, 0);
+	des_ecb_encrypt((des_cblock *)cipher, (des_cblock *)clear,
+	    key_schedule, 0);
 	return (1);
 }