dropbear: bump to 2020.79

- drop patches (applied upstream): * 010-backport-change-address-logging.patch * 020-backport-ed25519-support.patch * 021-backport-chacha20-poly1305-support.patch - backport patches: * 010-backport-disable-toom-and-karatsuba.patch: reduce dropbear binary size (about ~8Kb). - refresh patches. - don't bother anymore with following config options because they are disabled in upstream too: * DROPBEAR_3DES * DROPBEAR_ENABLE_CBC_MODE * DROPBEAR_SHA1_96_HMAC - explicitly disable DO_MOTD as it was before commit a1099ed: upstream has (accidentally) switched it to 0 in release 2019.77, but reverted back in release 2020.79. Signed-off-by: Konstantin Demin <rockdrilla@gmail.com>
2025-01-10 03:09:08 +08:00 · 2020-06-21 15:36:47 +03:00 · 2020-06-21 15:36:47 +03:00 · 29e170dbaa
commit 29e170dbaa
parent 340de1d154
9 changed files with 36 additions and 3722 deletions
--- a/package/network/services/dropbear/Makefile
+++ b/package/network/services/dropbear/Makefile
@ -8,14 +8,14 @@
 include $(TOPDIR)/rules.mk

 PKG_NAME:=dropbear
-PKG_VERSION:=2019.78
-PKG_RELEASE:=5
+PKG_VERSION:=2020.79
+PKG_RELEASE:=1

 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:= \
 	http://matt.ucc.asn.au/dropbear/releases/ \
 	https://dropbear.nl/mirror/releases/
-PKG_HASH:=525965971272270995364a0eb01f35180d793182e63dd0b0c3eb0292291644a4
+PKG_HASH:=084f00546b1610a3422a0773e2c04cbe1a220d984209e033b548b49f379cc441

 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=LICENSE libtomcrypt/LICENSE libtommath/LICENSE
@ -124,8 +124,7 @@ define Build/Configure

 	# disable legacy/unsafe methods and unused functionality
 	for OPTION in INETD_MODE DROPBEAR_CLI_NETCAT \
-	DROPBEAR_3DES DROPBEAR_DSS DROPBEAR_ENABLE_CBC_MODE \
-	DROPBEAR_SHA1_96_HMAC DROPBEAR_USE_PASSWORD_ENV; do \
+	DROPBEAR_DSS DROPBEAR_USE_PASSWORD_ENV DO_MOTD ; do \
 		echo "#define $$$$OPTION 0" >> \
 			$(PKG_BUILD_DIR)/localoptions.h; \
 	done
--- a/package/network/services/dropbear/patches/010-backport-change-address-logging.patch
+++ b/package/network/services/dropbear/patches/010-backport-change-address-logging.patch
@ -1,119 +0,0 @@
-From c153b3612b7c9f24a0f5af43618a646545ed6e22 Mon Sep 17 00:00:00 2001
-From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
-Date: Mon, 30 Sep 2019 12:42:13 +0100
-Subject: [PATCH] Improve address logging on early exit messages
-
-Change 'Early exit' and 'Exit before auth' messages to include the IP
-address & port as part of the message.
-
-This allows log scanning utilities such as 'fail2ban' to obtain the
-offending IP address as part of the failure event instead of extracting
-the PID from the message and then scanning the log again for match
-'child connection from' messages
-
-Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
- svr-auth.c    | 18 +++++++-----------
- svr-session.c | 20 ++++++++++++++------
- 2 files changed, 21 insertions(+), 17 deletions(-)
-
--- a/svr-auth.c
-+++ b/svr-auth.c
-@@ -241,8 +241,7 @@ static int checkusername(const char *use
- 	}
- 
- 	if (strlen(username) != userlen) {
-		dropbear_exit("Attempted username with a null byte from %s",
-			svr_ses.addrstring);
-+		dropbear_exit("Attempted username with a null byte");
- 	}
- 
- 	if (ses.authstate.username == NULL) {
-@@ -252,8 +251,7 @@ static int checkusername(const char *use
- 	} else {
- 		/* check username hasn't changed */
- 		if (strcmp(username, ses.authstate.username) != 0) {
-			dropbear_exit("Client trying multiple usernames from %s",
-				svr_ses.addrstring);
-+			dropbear_exit("Client trying multiple usernames");
- 		}
- 	}
- 
-@@ -268,8 +266,7 @@ static int checkusername(const char *use
- 	if (!ses.authstate.pw_name) {
- 		TRACE(("leave checkusername: user '%s' doesn't exist", username))
- 		dropbear_log(LOG_WARNING,
-				"Login attempt for nonexistent user from %s",
-				svr_ses.addrstring);
-+				"Login attempt for nonexistent user");
- 		ses.authstate.checkusername_failed = 1;
- 		return DROPBEAR_FAILURE;
- 	}
-@@ -279,9 +276,8 @@ static int checkusername(const char *use
- 	if (!(DROPBEAR_SVR_MULTIUSER && uid == 0) && uid != ses.authstate.pw_uid) {
- 		TRACE(("running as nonroot, only server uid is allowed"))
- 		dropbear_log(LOG_WARNING,
-				"Login attempt with wrong user %s from %s",
-				ses.authstate.pw_name,
-				svr_ses.addrstring);
-+				"Login attempt with wrong user %s",
-+				ses.authstate.pw_name);
- 		ses.authstate.checkusername_failed = 1;
- 		return DROPBEAR_FAILURE;
- 	}
-@@ -440,8 +436,8 @@ void send_msg_userauth_failure(int parti
- 		} else {
- 			userstr = ses.authstate.pw_name;
- 		}
-		dropbear_exit("Max auth tries reached - user '%s' from %s",
-				userstr, svr_ses.addrstring);
-+		dropbear_exit("Max auth tries reached - user '%s'",
-+				userstr);
- 	}
- 	
- 	TRACE(("leave send_msg_userauth_failure"))
--- a/svr-session.c
-+++ b/svr-session.c
-@@ -149,28 +149,36 @@ void svr_session(int sock, int childpipe
- void svr_dropbear_exit(int exitcode, const char* format, va_list param) {
- 	char exitmsg[150];
- 	char fullmsg[300];
-+	char fromaddr[60];
- 	int i;
- 
- 	/* Render the formatted exit message */
- 	vsnprintf(exitmsg, sizeof(exitmsg), format, param);
- 
-+	/* svr_ses.addrstring may not be set for some early exits, or for
-+	the listener process */
-+	fromaddr[0] = '\0';
-+	if (svr_ses.addrstring) {
-+	    snprintf(fromaddr, sizeof(fromaddr), " from <%s>", svr_ses.addrstring);
-+    }
-+
- 	/* Add the prefix depending on session/auth state */
- 	if (!ses.init_done) {
- 		/* before session init */
-		snprintf(fullmsg, sizeof(fullmsg), "Early exit: %s", exitmsg);
-+		snprintf(fullmsg, sizeof(fullmsg), "Early exit%s: %s", fromaddr, exitmsg);
- 	} else if (ses.authstate.authdone) {
- 		/* user has authenticated */
- 		snprintf(fullmsg, sizeof(fullmsg),
-				"Exit (%s): %s", 
-				ses.authstate.pw_name, exitmsg);
-+				"Exit (%s)%s: %s", 
-+				ses.authstate.pw_name, fromaddr, exitmsg);
- 	} else if (ses.authstate.pw_name) {
- 		/* we have a potential user */
- 		snprintf(fullmsg, sizeof(fullmsg), 
-				"Exit before auth (user '%s', %u fails): %s",
-				ses.authstate.pw_name, ses.authstate.failcount, exitmsg);
-+				"Exit before auth%s: (user '%s', %u fails): %s",
-+				fromaddr, ses.authstate.pw_name, ses.authstate.failcount, exitmsg);
- 	} else {
- 		/* before userauth */
-		snprintf(fullmsg, sizeof(fullmsg), "Exit before auth: %s", exitmsg);
-+		snprintf(fullmsg, sizeof(fullmsg), "Exit before auth%s: %s", fromaddr, exitmsg);
- 	}
- 
- 	dropbear_log(LOG_INFO, "%s", fullmsg);
--- a/package/network/services/dropbear/patches/010-backport-disable-toom-and-karatsuba.patch
+++ b/package/network/services/dropbear/patches/010-backport-disable-toom-and-karatsuba.patch
@ -0,0 +1,17 @@
+From: Matt Johnston <matt@ucc.asn.au>
+Date: Thu, 18 Jun 2020 19:12:07 +0800
+Subject: Disable toom and karatsuba for new libtommath
+
+--- a/libtommath/tommath_class.h
+++ b/libtommath/tommath_class.h
+@@ -1312,6 +1312,10 @@
+ #undef BN_MP_KARATSUBA_SQR_C
+ #undef BN_MP_TOOM_MUL_C
+ #undef BN_MP_TOOM_SQR_C
+#undef BN_S_MP_KARATSUBA_MUL_C
+#undef BN_S_MP_KARATSUBA_SQR_C
+#undef BN_S_MP_TOOM_MUL_C
+#undef BN_S_MP_TOOM_SQR_C
+ 
+ #include "dbmalloc.h"
+ #define MP_MALLOC    m_malloc
--- a/package/network/services/dropbear/patches/020-backport-ed25519-support.patch
+++ b/package/network/services/dropbear/patches/020-backport-ed25519-support.patch
--- a/package/network/services/dropbear/patches/021-backport-chacha20-poly1305-support.patch
+++ b/package/network/services/dropbear/patches/021-backport-chacha20-poly1305-support.patch
@ -1,693 +0,0 @@
-From 3cdf9ec918b37c17e12b33e4c244944d1ee836ca Mon Sep 17 00:00:00 2001
-From: Vladislav Grishenko <themiron@mail.ru>
-Date: Mon, 6 Apr 2020 23:28:09 +0500
-Subject: [PATCH] Add Chacha20-Poly1305 authenticated encryption
-
-* Add general AEAD approach.
-* Add chacha20-poly1305@openssh.com algo using LibTomCrypt chacha and
-  poly1305 routines.
-
-Chacha20-Poly1305 is generally faster than AES256 on CPU w/o dedicated
-AES instructions, having the same key size.
-Compiling in will add ~5,5kB to binary size on x86-64.
---
- Makefile.in                                 |   2 +-
- algo.h                                      |   8 ++
- chachapoly.c                                | 148 ++++++++++++++++++++
- chachapoly.h                                |  44 ++++++
- common-algo.c                               |  11 +-
- common-kex.c                                |  44 ++++--
- default_options.h                           |   6 +
- libtomcrypt/src/headers/tomcrypt_dropbear.h |   4 +
- packet.c                                    | 145 +++++++++++++------
- session.h                                   |   4 +
- sysoptions.h                                |   8 +-
- 11 files changed, 368 insertions(+), 56 deletions(-)
- create mode 100644 chachapoly.c
- create mode 100644 chachapoly.h
-
-diff --git a/Makefile.in b/Makefile.in
-index aaf7b3b..3437cb2 100644
--- a/Makefile.in
-+++ b/Makefile.in
-@@ -53,7 +53,7 @@ CLIOBJS=cli-main.o cli-auth.o cli-authpasswd.o cli-kex.o \
- CLISVROBJS=common-session.o packet.o common-algo.o common-kex.o \
- 			common-channel.o common-chansession.o termcodes.o loginrec.o \
- 			tcp-accept.o listener.o process-packet.o dh_groups.o \
-			common-runopts.o circbuffer.o list.o netio.o
-+			common-runopts.o circbuffer.o list.o netio.o chachapoly.o
- 
- KEYOBJS=dropbearkey.o
- 
-diff --git a/algo.h b/algo.h
-index b12fb94..efd0d73 100644
--- a/algo.h
-+++ b/algo.h
-@@ -72,6 +72,14 @@ struct dropbear_cipher_mode {
- 			unsigned long len, void *cipher_state);
- 	int (*decrypt)(const unsigned char *ct, unsigned char *pt, 
- 			unsigned long len, void *cipher_state);
-+	int (*aead_crypt)(unsigned int seq,
-+			const unsigned char *in, unsigned char *out,
-+			unsigned long len, unsigned long taglen,
-+			void *cipher_state, int direction);
-+	int (*aead_getlength)(unsigned int seq,
-+			const unsigned char *in, unsigned int *outlen,
-+			unsigned long len, void *cipher_state);
-+	const struct dropbear_hash *aead_mac;
- };
- 
- struct dropbear_hash {
-diff --git a/chachapoly.c b/chachapoly.c
-new file mode 100644
-index 0000000..8fb06c5
--- /dev/null
-+++ b/chachapoly.c
-@@ -0,0 +1,148 @@
-+/*
-+ * Dropbear SSH
-+ * 
-+ * Copyright (c) 2002,2003 Matt Johnston
-+ * Copyright (c) 2020 by Vladislav Grishenko
-+ * All rights reserved.
-+ * 
-+ * Permission is hereby granted, free of charge, to any person obtaining a copy
-+ * of this software and associated documentation files (the "Software"), to deal
-+ * in the Software without restriction, including without limitation the rights
-+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-+ * copies of the Software, and to permit persons to whom the Software is
-+ * furnished to do so, subject to the following conditions:
-+ * 
-+ * The above copyright notice and this permission notice shall be included in
-+ * all copies or substantial portions of the Software.
-+ * 
-+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-+ * SOFTWARE. */
-+
-+#include "includes.h"
-+#include "algo.h"
-+#include "dbutil.h"
-+#include "chachapoly.h"
-+
-+#if DROPBEAR_CHACHA20POLY1305
-+
-+#define CHACHA20_KEY_LEN 32
-+#define CHACHA20_BLOCKSIZE 8
-+#define POLY1305_KEY_LEN 32
-+#define POLY1305_TAG_LEN 16
-+
-+static const struct ltc_cipher_descriptor dummy = {.name = NULL};
-+
-+static const struct dropbear_hash dropbear_chachapoly_mac =
-+	{NULL, POLY1305_KEY_LEN, POLY1305_TAG_LEN};
-+
-+const struct dropbear_cipher dropbear_chachapoly =
-+	{&dummy, CHACHA20_KEY_LEN*2, CHACHA20_BLOCKSIZE};
-+
-+static int dropbear_chachapoly_start(int UNUSED(cipher), const unsigned char* UNUSED(IV),
-+			const unsigned char *key, int keylen,
-+			int UNUSED(num_rounds), dropbear_chachapoly_state *state) {
-+	int err;
-+
-+	TRACE2(("enter dropbear_chachapoly_start"))
-+
-+	if (keylen != CHACHA20_KEY_LEN*2) {
-+		return CRYPT_ERROR;
-+	}
-+
-+	if ((err = chacha_setup(&state->chacha, key,
-+				CHACHA20_KEY_LEN, 20)) != CRYPT_OK) {
-+		return err;
-+	}
-+
-+	if ((err = chacha_setup(&state->header, key + CHACHA20_KEY_LEN,
-+				CHACHA20_KEY_LEN, 20) != CRYPT_OK)) {
-+		return err;
-+	}
-+
-+	TRACE2(("leave dropbear_chachapoly_start"))
-+	return CRYPT_OK;
-+}
-+
-+static int dropbear_chachapoly_crypt(unsigned int seq,
-+			const unsigned char *in, unsigned char *out,
-+			unsigned long len, unsigned long taglen,
-+			dropbear_chachapoly_state *state, int direction) {
-+	poly1305_state poly;
-+	unsigned char seqbuf[8], key[POLY1305_KEY_LEN], tag[POLY1305_TAG_LEN];
-+	int err;
-+
-+	TRACE2(("enter dropbear_chachapoly_crypt"))
-+
-+	if (len < 4 || taglen != POLY1305_TAG_LEN) {
-+		return CRYPT_ERROR;
-+	}
-+
-+	STORE64H((uint64_t)seq, seqbuf);
-+	chacha_ivctr64(&state->chacha, seqbuf, sizeof(seqbuf), 0);
-+	if ((err = chacha_keystream(&state->chacha, key, sizeof(key))) != CRYPT_OK) {
-+		return err;
-+	}
-+
-+	poly1305_init(&poly, key, sizeof(key));
-+	if (direction == LTC_DECRYPT) {
-+		poly1305_process(&poly, in, len);
-+		poly1305_done(&poly, tag, &taglen);
-+		if (constant_time_memcmp(in + len, tag, taglen) != 0) {
-+			return CRYPT_ERROR;
-+		}
-+	}
-+
-+	chacha_ivctr64(&state->header, seqbuf, sizeof(seqbuf), 0);
-+	if ((err = chacha_crypt(&state->header, in, 4, out)) != CRYPT_OK) {
-+		return err;
-+	}
-+
-+	chacha_ivctr64(&state->chacha, seqbuf, sizeof(seqbuf), 1);
-+	if ((err = chacha_crypt(&state->chacha, in + 4, len - 4, out + 4)) != CRYPT_OK) {
-+		return err;
-+	}
-+
-+	if (direction == LTC_ENCRYPT) {
-+		poly1305_process(&poly, out, len);
-+		poly1305_done(&poly, out + len, &taglen);
-+	}
-+
-+	TRACE2(("leave dropbear_chachapoly_crypt"))
-+	return CRYPT_OK;
-+}
-+
-+static int dropbear_chachapoly_getlength(unsigned int seq,
-+			const unsigned char *in, unsigned int *outlen,
-+			unsigned long len, dropbear_chachapoly_state *state) {
-+	unsigned char seqbuf[8], buf[4];
-+	int err;
-+
-+	TRACE2(("enter dropbear_chachapoly_getlength"))
-+
-+	if (len < sizeof(buf)) {
-+		return CRYPT_ERROR;
-+	}
-+
-+	STORE64H((uint64_t)seq, seqbuf);
-+	chacha_ivctr64(&state->header, seqbuf, sizeof(seqbuf), 0);
-+	if ((err = chacha_crypt(&state->header, in, sizeof(buf), buf)) != CRYPT_OK) {
-+		return err;
-+	}
-+
-+	LOAD32H(*outlen, buf);
-+
-+	TRACE2(("leave dropbear_chachapoly_getlength"))
-+	return CRYPT_OK;
-+}
-+
-+const struct dropbear_cipher_mode dropbear_mode_chachapoly =
-+	{(void *)dropbear_chachapoly_start, NULL, NULL,
-+	 (void *)dropbear_chachapoly_crypt,
-+	 (void *)dropbear_chachapoly_getlength, &dropbear_chachapoly_mac};
-+
-+#endif /* DROPBEAR_CHACHA20POLY1305 */
-diff --git a/chachapoly.h b/chachapoly.h
-new file mode 100644
-index 0000000..5a7c5b2
--- /dev/null
-+++ b/chachapoly.h
-@@ -0,0 +1,44 @@
-+/*
-+ * Dropbear SSH
-+ * 
-+ * Copyright (c) 2002,2003 Matt Johnston
-+ * Copyright (c) 2020 by Vladislav Grishenko
-+ * All rights reserved.
-+ * 
-+ * Permission is hereby granted, free of charge, to any person obtaining a copy
-+ * of this software and associated documentation files (the "Software"), to deal
-+ * in the Software without restriction, including without limitation the rights
-+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-+ * copies of the Software, and to permit persons to whom the Software is
-+ * furnished to do so, subject to the following conditions:
-+ * 
-+ * The above copyright notice and this permission notice shall be included in
-+ * all copies or substantial portions of the Software.
-+ * 
-+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-+ * SOFTWARE. */
-+
-+#ifndef DROPBEAR_DROPBEAR_CHACHAPOLY_H_
-+#define DROPBEAR_DROPBEAR_CHACHAPOLY_H_
-+
-+#include "includes.h"
-+#include "algo.h"
-+
-+#if DROPBEAR_CHACHA20POLY1305
-+
-+typedef struct {
-+	chacha_state chacha;
-+	chacha_state header;
-+} dropbear_chachapoly_state;
-+
-+extern const struct dropbear_cipher dropbear_chachapoly;
-+extern const struct dropbear_cipher_mode dropbear_mode_chachapoly;
-+
-+#endif /* DROPBEAR_CHACHA20POLY1305 */
-+
-+#endif /* DROPBEAR_DROPBEAR_CHACHAPOLY_H_ */
-diff --git a/common-algo.c b/common-algo.c
-index 558aad2..1436456 100644
--- a/common-algo.c
-+++ b/common-algo.c
-@@ -30,6 +30,7 @@
- #include "dh_groups.h"
- #include "ltc_prng.h"
- #include "ecc.h"
-+#include "chachapoly.h"
- 
- /* This file (algo.c) organises the ciphers which can be used, and is used to
-  * decide which ciphers/hashes/compression/signing to use during key exchange*/
-@@ -86,11 +87,11 @@ const struct dropbear_cipher dropbear_nocipher =
-  * about the symmetric_CBC vs symmetric_CTR cipher_state pointer */
- #if DROPBEAR_ENABLE_CBC_MODE
- const struct dropbear_cipher_mode dropbear_mode_cbc =
-	{(void*)cbc_start, (void*)cbc_encrypt, (void*)cbc_decrypt};
-+	{(void*)cbc_start, (void*)cbc_encrypt, (void*)cbc_decrypt, NULL, NULL, NULL};
- #endif /* DROPBEAR_ENABLE_CBC_MODE */
- 
- const struct dropbear_cipher_mode dropbear_mode_none =
-	{void_start, void_cipher, void_cipher};
-+	{void_start, void_cipher, void_cipher, NULL, NULL, NULL};
- 
- #if DROPBEAR_ENABLE_CTR_MODE
- /* a wrapper to make ctr_start and cbc_start look the same */
-@@ -101,7 +102,7 @@ static int dropbear_big_endian_ctr_start(int cipher,
- 	return ctr_start(cipher, IV, key, keylen, num_rounds, CTR_COUNTER_BIG_ENDIAN, ctr);
- }
- const struct dropbear_cipher_mode dropbear_mode_ctr =
-	{(void*)dropbear_big_endian_ctr_start, (void*)ctr_encrypt, (void*)ctr_decrypt};
-+	{(void*)dropbear_big_endian_ctr_start, (void*)ctr_encrypt, (void*)ctr_decrypt, NULL, NULL, NULL};
- #endif /* DROPBEAR_ENABLE_CTR_MODE */
- 
- /* Mapping of ssh hashes to libtomcrypt hashes, including keysize etc.
-@@ -137,6 +138,10 @@ const struct dropbear_hash dropbear_nohash =
-  * that is also supported by the server will get used. */
- 
- algo_type sshciphers[] = {
-+#if DROPBEAR_CHACHA20POLY1305
-+	{"chacha20-poly1305@openssh.com", 0, &dropbear_chachapoly, 1, &dropbear_mode_chachapoly},
-+#endif
-+
- #if DROPBEAR_ENABLE_CTR_MODE
- #if DROPBEAR_AES128
- 	{"aes128-ctr", 0, &dropbear_aes128, 1, &dropbear_mode_ctr},
-diff --git a/common-kex.c b/common-kex.c
-index 16b7e27..5e2923f 100644
--- a/common-kex.c
-+++ b/common-kex.c
-@@ -329,9 +329,12 @@ static void gen_new_keys() {
- 	hashkeys(S2C_key, sizeof(S2C_key), &hs, 'D');
- 
- 	if (ses.newkeys->recv.algo_crypt->cipherdesc != NULL) {
-		int recv_cipher = find_cipher(ses.newkeys->recv.algo_crypt->cipherdesc->name);
-		if (recv_cipher < 0)
-			dropbear_exit("Crypto error");
-+		int recv_cipher = -1;
-+		if (ses.newkeys->recv.algo_crypt->cipherdesc->name != NULL) {
-+			recv_cipher = find_cipher(ses.newkeys->recv.algo_crypt->cipherdesc->name);
-+			if (recv_cipher < 0)
-+				dropbear_exit("Crypto error");
-+		}
- 		if (ses.newkeys->recv.crypt_mode->start(recv_cipher, 
- 				recv_IV, recv_key, 
- 				ses.newkeys->recv.algo_crypt->keysize, 0, 
-@@ -341,9 +344,12 @@ static void gen_new_keys() {
- 	}
- 
- 	if (ses.newkeys->trans.algo_crypt->cipherdesc != NULL) {
-		int trans_cipher = find_cipher(ses.newkeys->trans.algo_crypt->cipherdesc->name);
-		if (trans_cipher < 0)
-			dropbear_exit("Crypto error");
-+		int trans_cipher = -1;
-+		if (ses.newkeys->trans.algo_crypt->cipherdesc->name != NULL) {
-+			trans_cipher = find_cipher(ses.newkeys->trans.algo_crypt->cipherdesc->name);
-+			if (trans_cipher < 0)
-+				dropbear_exit("Crypto error");
-+		}
- 		if (ses.newkeys->trans.crypt_mode->start(trans_cipher, 
- 				trans_IV, trans_key, 
- 				ses.newkeys->trans.algo_crypt->keysize, 0, 
-@@ -868,19 +874,29 @@ static void read_kex_algos() {
- 
- 	/* mac_algorithms_client_to_server */
- 	c2s_hash_algo = buf_match_algo(ses.payload, sshhashes, NULL, NULL);
-+#if DROPBEAR_AEAD_MODE
-+	if (((struct dropbear_cipher_mode*)c2s_cipher_algo->mode)->aead_crypt != NULL) {
-+		c2s_hash_algo = NULL;
-+	} else
-+#endif
- 	if (c2s_hash_algo == NULL) {
- 		erralgo = "mac c->s";
- 		goto error;
- 	}
-	TRACE(("hash c2s is  %s", c2s_hash_algo->name))
-+	TRACE(("hash c2s is  %s", c2s_hash_algo ? c2s_hash_algo->name : "<implicit>"))
- 
- 	/* mac_algorithms_server_to_client */
- 	s2c_hash_algo = buf_match_algo(ses.payload, sshhashes, NULL, NULL);
-+#if DROPBEAR_AEAD_MODE
-+	if (((struct dropbear_cipher_mode*)s2c_cipher_algo->mode)->aead_crypt != NULL) {
-+		s2c_hash_algo = NULL;
-+	} else
-+#endif
- 	if (s2c_hash_algo == NULL) {
- 		erralgo = "mac s->c";
- 		goto error;
- 	}
-	TRACE(("hash s2c is  %s", s2c_hash_algo->name))
-+	TRACE(("hash s2c is  %s", s2c_hash_algo ? s2c_hash_algo->name : "<implicit>"))
- 
- 	/* compression_algorithms_client_to_server */
- 	c2s_comp_algo = buf_match_algo(ses.payload, ses.compress_algos, NULL, NULL);
-@@ -925,8 +941,14 @@ static void read_kex_algos() {
- 		ses.newkeys->trans.crypt_mode =
- 			(struct dropbear_cipher_mode*)c2s_cipher_algo->mode;
- 		ses.newkeys->recv.algo_mac = 
-+#if DROPBEAR_AEAD_MODE
-+			s2c_hash_algo == NULL ? ses.newkeys->recv.crypt_mode->aead_mac :
-+#endif
- 			(struct dropbear_hash*)s2c_hash_algo->data;
- 		ses.newkeys->trans.algo_mac = 
-+#if DROPBEAR_AEAD_MODE
-+			c2s_hash_algo == NULL ? ses.newkeys->trans.crypt_mode->aead_mac :
-+#endif
- 			(struct dropbear_hash*)c2s_hash_algo->data;
- 		ses.newkeys->recv.algo_comp = s2c_comp_algo->val;
- 		ses.newkeys->trans.algo_comp = c2s_comp_algo->val;
-@@ -941,8 +963,14 @@ static void read_kex_algos() {
- 		ses.newkeys->trans.crypt_mode =
- 			(struct dropbear_cipher_mode*)s2c_cipher_algo->mode;
- 		ses.newkeys->recv.algo_mac = 
-+#if DROPBEAR_AEAD_MODE
-+			c2s_hash_algo == NULL ? ses.newkeys->recv.crypt_mode->aead_mac :
-+#endif
- 			(struct dropbear_hash*)c2s_hash_algo->data;
- 		ses.newkeys->trans.algo_mac = 
-+#if DROPBEAR_AEAD_MODE
-+			s2c_hash_algo == NULL ? ses.newkeys->trans.crypt_mode->aead_mac :
-+#endif
- 			(struct dropbear_hash*)s2c_hash_algo->data;
- 		ses.newkeys->recv.algo_comp = c2s_comp_algo->val;
- 		ses.newkeys->trans.algo_comp = s2c_comp_algo->val;
-diff --git a/default_options.h b/default_options.h
-index bafbb07..1a2ab10 100644
--- a/default_options.h
-+++ b/default_options.h
-@@ -99,6 +99,12 @@ IMPORTANT: Some options will require "make clean" after changes */
-  * and forwards compatibility */
- #define DROPBEAR_ENABLE_CTR_MODE 1
- 
-+/* Enable Chacha20-Poly1305 authenticated encryption mode. This is
-+ * generally faster than AES256 on CPU w/o dedicated AES instructions,
-+ * having the same key size.
-+ * Compiling in will add ~5,5kB to binary size on x86-64 */
-+#define DROPBEAR_CHACHA20POLY1305 1
-+
- /* Message integrity. sha2-256 is recommended as a default, 
-    sha1 for compatibility */
- #define DROPBEAR_SHA1_HMAC 1
-diff --git a/libtomcrypt/src/headers/tomcrypt_dropbear.h b/libtomcrypt/src/headers/tomcrypt_dropbear.h
-index b0ce45b..59960e5 100644
--- a/libtomcrypt/src/headers/tomcrypt_dropbear.h
-+++ b/libtomcrypt/src/headers/tomcrypt_dropbear.h
-@@ -35,6 +35,10 @@
- #define LTC_CTR_MODE
- #endif
- 
-+#if DROPBEAR_CHACHA20POLY1305
-+#define LTC_CHACHA
-+#define LTC_POLY1305
-+#endif
- 
- #if DROPBEAR_SHA512
- #define LTC_SHA512
-diff --git a/packet.c b/packet.c
-index 9fda0d6..0454726 100644
--- a/packet.c
-+++ b/packet.c
-@@ -215,7 +215,7 @@ static int read_packet_init() {
- 
- 	unsigned int maxlen;
- 	int slen;
-	unsigned int len;
-+	unsigned int len, plen;
- 	unsigned int blocksize;
- 	unsigned int macsize;
- 
-@@ -254,21 +254,35 @@ static int read_packet_init() {
- 	/* now we have the first block, need to get packet length, so we decrypt
- 	 * the first block (only need first 4 bytes) */
- 	buf_setpos(ses.readbuf, 0);
-	if (ses.keys->recv.crypt_mode->decrypt(buf_getptr(ses.readbuf, blocksize), 
-				buf_getwriteptr(ses.readbuf, blocksize),
-				blocksize,
-				&ses.keys->recv.cipher_state) != CRYPT_OK) {
-		dropbear_exit("Error decrypting");
-+#if DROPBEAR_AEAD_MODE
-+	if (ses.keys->recv.crypt_mode->aead_crypt) {
-+		if (ses.keys->recv.crypt_mode->aead_getlength(ses.recvseq,
-+					buf_getptr(ses.readbuf, blocksize), &plen,
-+					blocksize,
-+					&ses.keys->recv.cipher_state) != CRYPT_OK) {
-+			dropbear_exit("Error decrypting");
-+		}
-+		len = plen + 4 + macsize;
-+	} else
-+#endif
-+	{
-+		if (ses.keys->recv.crypt_mode->decrypt(buf_getptr(ses.readbuf, blocksize), 
-+					buf_getwriteptr(ses.readbuf, blocksize),
-+					blocksize,
-+					&ses.keys->recv.cipher_state) != CRYPT_OK) {
-+			dropbear_exit("Error decrypting");
-+		}
-+		plen = buf_getint(ses.readbuf) + 4;
-+		len = plen + macsize;
- 	}
-	len = buf_getint(ses.readbuf) + 4 + macsize;
- 
- 	TRACE2(("packet size is %u, block %u mac %u", len, blocksize, macsize))
- 
- 
- 	/* check packet length */
- 	if ((len > RECV_MAX_PACKET_LEN) ||
-		(len < MIN_PACKET_LEN + macsize) ||
-		((len - macsize) % blocksize != 0)) {
-+		(plen < blocksize) ||
-+		(plen % blocksize != 0)) {
- 		dropbear_exit("Integrity error (bad packet size %u)", len);
- 	}
- 
-@@ -294,23 +308,42 @@ void decrypt_packet() {
- 
- 	ses.kexstate.datarecv += ses.readbuf->len;
- 
-	/* we've already decrypted the first blocksize in read_packet_init */
-	buf_setpos(ses.readbuf, blocksize);
-
-	/* decrypt it in-place */
-	len = ses.readbuf->len - macsize - ses.readbuf->pos;
-	if (ses.keys->recv.crypt_mode->decrypt(
-				buf_getptr(ses.readbuf, len), 
-				buf_getwriteptr(ses.readbuf, len),
-				len,
-				&ses.keys->recv.cipher_state) != CRYPT_OK) {
-		dropbear_exit("Error decrypting");
-	}
-	buf_incrpos(ses.readbuf, len);
-+#if DROPBEAR_AEAD_MODE
-+	if (ses.keys->recv.crypt_mode->aead_crypt) {
-+		/* first blocksize is not decrypted yet */
-+		buf_setpos(ses.readbuf, 0);
-+
-+		/* decrypt it in-place */
-+		len = ses.readbuf->len - macsize - ses.readbuf->pos;
-+		if (ses.keys->recv.crypt_mode->aead_crypt(ses.recvseq,
-+					buf_getptr(ses.readbuf, len + macsize),
-+					buf_getwriteptr(ses.readbuf, len),
-+					len, macsize,
-+					&ses.keys->recv.cipher_state, LTC_DECRYPT) != CRYPT_OK) {
-+			dropbear_exit("Error decrypting");
-+		}
-+		buf_incrpos(ses.readbuf, len);
-+	} else
-+#endif
-+	{
-+		/* we've already decrypted the first blocksize in read_packet_init */
-+		buf_setpos(ses.readbuf, blocksize);
-+
-+		/* decrypt it in-place */
-+		len = ses.readbuf->len - macsize - ses.readbuf->pos;
-+		if (ses.keys->recv.crypt_mode->decrypt(
-+					buf_getptr(ses.readbuf, len), 
-+					buf_getwriteptr(ses.readbuf, len),
-+					len,
-+					&ses.keys->recv.cipher_state) != CRYPT_OK) {
-+			dropbear_exit("Error decrypting");
-+		}
-+		buf_incrpos(ses.readbuf, len);
- 
-	/* check the hmac */
-	if (checkmac() != DROPBEAR_SUCCESS) {
-		dropbear_exit("Integrity error");
-+		/* check the hmac */
-+		if (checkmac() != DROPBEAR_SUCCESS) {
-+			dropbear_exit("Integrity error");
-+		}
- 	}
- 
- 	/* get padding length */
-@@ -557,9 +590,16 @@ void encrypt_packet() {
- 	buf_setpos(ses.writepayload, 0);
- 	buf_setlen(ses.writepayload, 0);
- 
-	/* length of padding - packet length must be a multiple of blocksize,
-	 * with a minimum of 4 bytes of padding */
-	padlen = blocksize - (writebuf->len) % blocksize;
-+	/* length of padding - packet length excluding the packetlength uint32
-+	 * field in aead mode must be a multiple of blocksize, with a minimum of
-+	 * 4 bytes of padding */
-+	len = writebuf->len;
-+#if DROPBEAR_AEAD_MODE
-+	if (ses.keys->trans.crypt_mode->aead_crypt) {
-+		len -= 4;
-+	}
-+#endif
-+	padlen = blocksize - len % blocksize;
- 	if (padlen < 4) {
- 		padlen += blocksize;
- 	}
-@@ -579,23 +619,42 @@ void encrypt_packet() {
- 	buf_incrlen(writebuf, padlen);
- 	genrandom(buf_getptr(writebuf, padlen), padlen);
- 
-	make_mac(ses.transseq, &ses.keys->trans, writebuf, writebuf->len, mac_bytes);
-+#if DROPBEAR_AEAD_MODE
-+	if (ses.keys->trans.crypt_mode->aead_crypt) {
-+		/* do the actual encryption, in-place */
-+		buf_setpos(writebuf, 0);
-+		/* encrypt it in-place*/
-+		len = writebuf->len;
-+		buf_incrlen(writebuf, mac_size);
-+		if (ses.keys->trans.crypt_mode->aead_crypt(ses.transseq,
-+					buf_getptr(writebuf, len),
-+					buf_getwriteptr(writebuf, len + mac_size),
-+					len, mac_size,
-+					&ses.keys->trans.cipher_state, LTC_ENCRYPT) != CRYPT_OK) {
-+			dropbear_exit("Error encrypting");
-+		}
-+		buf_incrpos(writebuf, len + mac_size);
-+	} else
-+#endif
-+	{
-+		make_mac(ses.transseq, &ses.keys->trans, writebuf, writebuf->len, mac_bytes);
-+
-+		/* do the actual encryption, in-place */
-+		buf_setpos(writebuf, 0);
-+		/* encrypt it in-place*/
-+		len = writebuf->len;
-+		if (ses.keys->trans.crypt_mode->encrypt(
-+					buf_getptr(writebuf, len),
-+					buf_getwriteptr(writebuf, len),
-+					len,
-+					&ses.keys->trans.cipher_state) != CRYPT_OK) {
-+			dropbear_exit("Error encrypting");
-+		}
-+		buf_incrpos(writebuf, len);
- 
-	/* do the actual encryption, in-place */
-	buf_setpos(writebuf, 0);
-	/* encrypt it in-place*/
-	len = writebuf->len;
-	if (ses.keys->trans.crypt_mode->encrypt(
-				buf_getptr(writebuf, len),
-				buf_getwriteptr(writebuf, len),
-				len,
-				&ses.keys->trans.cipher_state) != CRYPT_OK) {
-		dropbear_exit("Error encrypting");
-+		/* stick the MAC on it */
-+		buf_putbytes(writebuf, mac_bytes, mac_size);
- 	}
-	buf_incrpos(writebuf, len);
-
-	/* stick the MAC on it */
-	buf_putbytes(writebuf, mac_bytes, mac_size);
- 
- 	/* Update counts */
- 	ses.kexstate.datatrans += writebuf->len;
-diff --git a/session.h b/session.h
-index e436882..a8f8914 100644
--- a/session.h
-+++ b/session.h
-@@ -41,6 +41,7 @@
- #include "chansession.h"
- #include "dbutil.h"
- #include "netio.h"
-+#include "chachapoly.h"
- 
- void common_session_init(int sock_in, int sock_out);
- void session_loop(void(*loophandler)(void)) ATTRIB_NORETURN;
-@@ -80,6 +81,9 @@ struct key_context_directional {
- 		symmetric_CBC cbc;
- #if DROPBEAR_ENABLE_CTR_MODE
- 		symmetric_CTR ctr;
-+#endif
-+#if DROPBEAR_CHACHA20POLY1305
-+		dropbear_chachapoly_state chachapoly;
- #endif
- 	} cipher_state;
- 	unsigned char mackey[MAX_MAC_LEN];
-diff --git a/sysoptions.h b/sysoptions.h
-index 2c27caf..2432779 100644
--- a/sysoptions.h
-+++ b/sysoptions.h
-@@ -92,7 +92,11 @@
- #define MD5_HASH_SIZE 16
- #define MAX_HASH_SIZE 64 /* sha512 */
- 
-+#if DROPBEAR_CHACHA20POLY1305
-+#define MAX_KEY_LEN 64 /* 2 x 256 bits for chacha20 */
-+#else
- #define MAX_KEY_LEN 32 /* 256 bits for aes256 etc */
-+#endif
- #define MAX_IV_LEN 20 /* must be same as max blocksize,  */
- 
- #if DROPBEAR_SHA2_512_HMAC
-@@ -207,6 +211,8 @@ If you test it please contact the Dropbear author */
- 
- #define DROPBEAR_TWOFISH ((DROPBEAR_TWOFISH256) || (DROPBEAR_TWOFISH128))
- 
-+#define DROPBEAR_AEAD_MODE ((DROPBEAR_CHACHA20POLY1305))
-+
- #define DROPBEAR_CLI_ANYTCPFWD ((DROPBEAR_CLI_REMOTETCPFWD) || (DROPBEAR_CLI_LOCALTCPFWD))
- 
- #define DROPBEAR_TCP_ACCEPT ((DROPBEAR_CLI_LOCALTCPFWD) || (DROPBEAR_SVR_REMOTETCPFWD))
-@@ -249,7 +255,7 @@ If you test it please contact the Dropbear author */
- #endif
- 
- #if !(DROPBEAR_AES128 || DROPBEAR_3DES || DROPBEAR_AES256 || DROPBEAR_BLOWFISH \
-      || DROPBEAR_TWOFISH256 || DROPBEAR_TWOFISH128)
-+      || DROPBEAR_TWOFISH256 || DROPBEAR_TWOFISH128 || DROPBEAR_CHACHA20POLY1305)
- 	#error "At least one encryption algorithm must be enabled. AES128 is recommended."
- #endif
- 
-- 
-2.17.1
-
--- a/package/network/services/dropbear/patches/100-pubkey_path.patch
+++ b/package/network/services/dropbear/patches/100-pubkey_path.patch
@ -1,6 +1,6 @@
 --- a/svr-authpubkey.c
 +++ b/svr-authpubkey.c
-@@ -338,14 +338,19 @@ static int checkpubkey(const char* algo,
+@@ -386,14 +386,19 @@ static int checkpubkey(const char* keyal
 		goto out;
 	}
 
@ -28,7 +28,7 @@
 
 #if DROPBEAR_SVR_MULTIUSER
 	/* open the file as the authenticating user. */
-@@ -426,27 +431,36 @@ static int checkpubkeyperms() {
+@@ -474,27 +479,36 @@ static int checkpubkeyperms() {
 		goto out;
 	}
 
--- a/package/network/services/dropbear/patches/110-change_user.patch
+++ b/package/network/services/dropbear/patches/110-change_user.patch
@ -1,6 +1,6 @@
 --- a/svr-chansession.c
 +++ b/svr-chansession.c
-@@ -953,12 +953,12 @@ static void execchild(const void *user_d
+@@ -950,12 +950,12 @@ static void execchild(const void *user_d
 	/* We can only change uid/gid as root ... */
 	if (getuid() == 0) {
 
--- a/package/network/services/dropbear/patches/160-lto-jobserver.patch
+++ b/package/network/services/dropbear/patches/160-lto-jobserver.patch
@ -1,11 +1,11 @@
 --- a/Makefile.in
 +++ b/Makefile.in
-@@ -189,17 +189,17 @@ dropbearkey: $(dropbearkeyobjs)
+@@ -199,17 +199,17 @@ dropbearkey: $(dropbearkeyobjs)
 dropbearconvert: $(dropbearconvertobjs)
 
 dropbear: $(HEADERS) $(LIBTOM_DEPS) Makefile
-	$(CC) $(LDFLAGS) -o $@$(EXEEXT) $($@objs) $(LIBTOM_LIBS) $(LIBS) @CRYPTLIB@
-+	+$(CC) $(LDFLAGS) -o $@$(EXEEXT) $($@objs) $(LIBTOM_LIBS) $(LIBS) @CRYPTLIB@
+-	$(CC) $(LDFLAGS) -o $@$(EXEEXT) $($@objs) $(LIBTOM_LIBS) $(LIBS) @CRYPTLIB@ $(PLUGIN_LIBS)
+	+$(CC) $(LDFLAGS) -o $@$(EXEEXT) $($@objs) $(LIBTOM_LIBS) $(LIBS) @CRYPTLIB@ $(PLUGIN_LIBS)
 
 dbclient: $(HEADERS) $(LIBTOM_DEPS) Makefile
 -	$(CC) $(LDFLAGS) -o $@$(EXEEXT) $($@objs) $(LIBTOM_LIBS) $(LIBS)
@ -22,7 +22,7 @@
 
 
 # multi-binary compilation.
-@@ -210,7 +210,7 @@ ifeq ($(MULTI),1)
+@@ -220,7 +220,7 @@ ifeq ($(MULTI),1)
 endif
 
 dropbearmulti$(EXEEXT): $(HEADERS) $(MULTIOBJS) $(LIBTOM_DEPS) Makefile
--- a/package/network/services/dropbear/patches/901-bundled-libs-cflags.patch
+++ b/package/network/services/dropbear/patches/901-bundled-libs-cflags.patch
@ -1,6 +1,6 @@
 --- a/libtomcrypt/makefile_include.mk
 +++ b/libtomcrypt/makefile_include.mk
-@@ -75,6 +75,13 @@ endif
+@@ -94,6 +94,13 @@ endif
 
 LTC_CFLAGS += -Wno-type-limits
 
@ -14,7 +14,7 @@
 ifdef LTC_DEBUG
 $(info Debug build)
 # compile for DEBUGGING (required for ccmalloc checking!!!)
-@@ -102,6 +109,9 @@ endif
+@@ -121,6 +128,9 @@ endif
 endif # COMPILE_SMALL
 endif # COMPILE_DEBUG
 
@ -26,8 +26,8 @@
 LTC_CFLAGS += -Wno-typedef-redefinition -Wno-tautological-compare -Wno-builtin-requires-header -Wno-missing-field-initializers
 --- a/libtommath/makefile_include.mk
 +++ b/libtommath/makefile_include.mk
-@@ -37,6 +37,9 @@ CFLAGS += -Wsystem-headers -Wdeclaration
- CFLAGS += -Wstrict-prototypes -Wpointer-arith
+@@ -70,6 +70,9 @@ else
+ LTM_CFLAGS += -Wsystem-headers
 endif
 
 +ifndef OPENWRT_BUILD
@ -35,14 +35,14 @@
 +
 ifdef COMPILE_DEBUG
 #debug
- CFLAGS += -g3
-@@ -58,6 +61,9 @@ endif
+ LTM_CFLAGS += -g3
+@@ -90,6 +93,9 @@ endif
+ 
 endif # COMPILE_SIZE
- endif # COMPILE_DEBUG
 
 +  ### ! OPENWRT_BUILD
 +endif
 +
 ifneq ($(findstring clang,$(CC)),)
- CFLAGS += -Wno-typedef-redefinition -Wno-tautological-compare -Wno-builtin-requires-header
+ LTM_CFLAGS += -Wno-typedef-redefinition -Wno-tautological-compare -Wno-builtin-requires-header
 endif