dropbear: update to 2019.77

 - update dropbear to version 2019.77
 - drop obsolete patch

(From OE-Core rev: c0f2e6f74119538a33095c27a8d9e92084741672)

Signed-off-by: Andrej Valek <andrej.valek@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

4 files changed, 4 insertions, 242 deletions

diff --git a/meta/recipes-core/dropbear/dropbear.inc b/meta/recipes-core/dropbear/dropbear.inc
index d92a2f3991..3fbdb5e825 100644
--- a/meta/recipes-core/dropbear/dropbear.inc
+++ b/meta/recipes-core/dropbear/dropbear.inc
@@ -13,7 +13,6 @@ RPROVIDES_${PN} = "ssh sshd"
 DEPENDS += "${@bb.utils.contains('DISTRO_FEATURES', 'pam', 'libpam', '', d)}"
 
 SRC_URI = "http://matt.ucc.asn.au/dropbear/releases/dropbear-${PV}.tar.bz2 \
-           file://CVE-2018-15599.patch \
            file://0001-urandom-xauth-changes-to-options.h.patch \
            file://init \
            file://dropbearkey.service \
diff --git a/meta/recipes-core/dropbear/dropbear/CVE-2018-15599.patch b/meta/recipes-core/dropbear/dropbear/CVE-2018-15599.patch
deleted file mode 100644
index 912545c957..0000000000
--- a/meta/recipes-core/dropbear/dropbear/CVE-2018-15599.patch
+++ /dev/null
@@ -1,236 +0,0 @@
-From 256e2abb8150f9fea33cd026597dbe70f0379296 Mon Sep 17 00:00:00 2001
-From: Matt Johnston <matt@ucc.asn.au>
-Date: Thu, 23 Aug 2018 23:43:12 +0800
-Subject: [PATCH] Wait to fail invalid usernames
-
-Wait to fail invalid usernames
-
-Upstream-Status: Backport [https://secure.ucc.asn.au/hg/dropbear/rev/5d2d1021ca00]
-CVE: CVE-2018-15599
-Signed-off-by: Mingli Yu <Mingli.Yu@windriver.com>
----
- auth.h           |  6 +++---
- svr-auth.c       | 19 +++++--------------
- svr-authpam.c    | 26 ++++++++++++++++++++++----
- svr-authpasswd.c | 27 ++++++++++++++-------------
- svr-authpubkey.c | 11 ++++++++++-
- 5 files changed, 54 insertions(+), 35 deletions(-)
-
-diff --git a/auth.h b/auth.h
-index da498f5..98f5468 100644
---- a/auth.h
-+++ b/auth.h
-@@ -37,9 +37,9 @@ void recv_msg_userauth_request(void);
- void send_msg_userauth_failure(int partial, int incrfail);
- void send_msg_userauth_success(void);
- void send_msg_userauth_banner(const buffer *msg);
--void svr_auth_password(void);
--void svr_auth_pubkey(void);
--void svr_auth_pam(void);
-+void svr_auth_password(int valid_user);
-+void svr_auth_pubkey(int valid_user);
-+void svr_auth_pam(int valid_user);
- 
- #if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT
- int svr_pubkey_allows_agentfwd(void);
-diff --git a/svr-auth.c b/svr-auth.c
-index 64d97aa..1f364ca 100644
---- a/svr-auth.c
-+++ b/svr-auth.c
-@@ -149,10 +149,8 @@ void recv_msg_userauth_request() {
-                if (methodlen == AUTH_METHOD_PASSWORD_LEN &&
-                                strncmp(methodname, AUTH_METHOD_PASSWORD,
-                                        AUTH_METHOD_PASSWORD_LEN) == 0) {
--                       if (valid_user) {
--                               svr_auth_password();
--                               goto out;
--                       }
-+                       svr_auth_password(valid_user);
-+                       goto out;
-                }
-        }
- #endif
-@@ -164,10 +162,8 @@ void recv_msg_userauth_request() {
-                if (methodlen == AUTH_METHOD_PASSWORD_LEN &&
-                                strncmp(methodname, AUTH_METHOD_PASSWORD,
-                                        AUTH_METHOD_PASSWORD_LEN) == 0) {
--                       if (valid_user) {
--                               svr_auth_pam();
--                               goto out;
--                       }
-+                       svr_auth_pam(valid_user);
-+                       goto out;
-                }
-        }
- #endif
-@@ -177,12 +173,7 @@ void recv_msg_userauth_request() {
-        if (methodlen == AUTH_METHOD_PUBKEY_LEN &&
-                        strncmp(methodname, AUTH_METHOD_PUBKEY,
-                                AUTH_METHOD_PUBKEY_LEN) == 0) {
--               if (valid_user) {
--                       svr_auth_pubkey();
--               } else {
--                       /* pubkey has no failure delay */
--                       send_msg_userauth_failure(0, 0);
--               }
-+               svr_auth_pubkey(valid_user);
-                goto out;
-        }
- #endif
-diff --git a/svr-authpam.c b/svr-authpam.c
-index 05e4f3e..d201bc9 100644
---- a/svr-authpam.c
-+++ b/svr-authpam.c
-@@ -178,13 +178,14 @@ pamConvFunc(int num_msg,
-  * Keyboard interactive would be a lot nicer, but since PAM is synchronous, it
-  * gets very messy trying to send the interactive challenges, and read the
-  * interactive responses, over the network. */
--void svr_auth_pam() {
-+void svr_auth_pam(int valid_user) {
- 
-        struct UserDataS userData = {NULL, NULL};
-        struct pam_conv pamConv = {
-                pamConvFunc,
-                &userData /* submitted to pamvConvFunc as appdata_ptr */ 
-        };
-+       const char* printable_user = NULL;
- 
-        pam_handle_t* pamHandlep = NULL;
- 
-@@ -204,12 +205,23 @@ void svr_auth_pam() {
- 
-        password = buf_getstring(ses.payload, &passwordlen);
- 
-+       /* We run the PAM conversation regardless of whether the username is valid
-+       in case the conversation function has an inherent delay.
-+       Use ses.authstate.username rather than ses.authstate.pw_name.
-+       After PAM succeeds we then check the valid_user flag too */
-+
-        /* used to pass data to the PAM conversation function - don't bother with
-         * strdup() etc since these are touched only by our own conversation
-         * function (above) which takes care of it */
--       userData.user = ses.authstate.pw_name;
-+       userData.user = ses.authstate.username;
-        userData.passwd = password;
- 
-+       if (ses.authstate.pw_name) {
-+               printable_user = ses.authstate.pw_name;
-+       } else {
-+               printable_user = "<invalid username>";
-+       }
-+
-        /* Init pam */
-        if ((rc = pam_start("sshd", NULL, &pamConv, &pamHandlep)) != PAM_SUCCESS) {
-                dropbear_log(LOG_WARNING, "pam_start() failed, rc=%d, %s", 
-@@ -242,7 +254,7 @@ void svr_auth_pam() {
-                                rc, pam_strerror(pamHandlep, rc));
-                dropbear_log(LOG_WARNING,
-                                "Bad PAM password attempt for '%s' from %s",
--                               ses.authstate.pw_name,
-+                               printable_user,
-                                svr_ses.addrstring);
-                send_msg_userauth_failure(0, 1);
-                goto cleanup;
-@@ -253,12 +265,18 @@ void svr_auth_pam() {
-                                rc, pam_strerror(pamHandlep, rc));
-                dropbear_log(LOG_WARNING,
-                                "Bad PAM password attempt for '%s' from %s",
--                               ses.authstate.pw_name,
-+                               printable_user,
-                                svr_ses.addrstring);
-                send_msg_userauth_failure(0, 1);
-                goto cleanup;
-        }
- 
-+       if (!valid_user) {
-+               /* PAM auth succeeded but the username isn't allowed in for another reason
-+               (checkusername() failed) */
-+               send_msg_userauth_failure(0, 1);
-+       }
-+
-        /* successful authentication */
-        dropbear_log(LOG_NOTICE, "PAM password auth succeeded for '%s' from %s",
-                        ses.authstate.pw_name,
-diff --git a/svr-authpasswd.c b/svr-authpasswd.c
-index bdee2aa..69c7d8a 100644
---- a/svr-authpasswd.c
-+++ b/svr-authpasswd.c
-@@ -48,22 +48,14 @@ static int constant_time_strcmp(const char* a, const char* b) {
- 
- /* Process a password auth request, sending success or failure messages as
-  * appropriate */
--void svr_auth_password() {
-+void svr_auth_password(int valid_user) {
-        
-        char * passwdcrypt = NULL; /* the crypt from /etc/passwd or /etc/shadow */
-        char * testcrypt = NULL; /* crypt generated from the user's password sent */
--       char * password;
-+       char * password = NULL;
-        unsigned int passwordlen;
--
-        unsigned int changepw;
- 
--       passwdcrypt = ses.authstate.pw_passwd;
--
--#ifdef DEBUG_HACKCRYPT
--       /* debugging crypt for non-root testing with shadows */
--       passwdcrypt = DEBUG_HACKCRYPT;
--#endif
--
-        /* check if client wants to change password */
-        changepw = buf_getbool(ses.payload);
-        if (changepw) {
-@@ -73,12 +65,21 @@ void svr_auth_password() {
-        }
- 
-        password = buf_getstring(ses.payload, &passwordlen);
--
--       /* the first bytes of passwdcrypt are the salt */
--       testcrypt = crypt(password, passwdcrypt);
-+       if (valid_user) {
-+               /* the first bytes of passwdcrypt are the salt */
-+               passwdcrypt = ses.authstate.pw_passwd;
-+               testcrypt = crypt(password, passwdcrypt);
-+       }
-        m_burn(password, passwordlen);
-        m_free(password);
- 
-+       /* After we have got the payload contents we can exit if the username
-+       is invalid. Invalid users have already been logged. */
-+       if (!valid_user) {
-+               send_msg_userauth_failure(0, 1);
-+               return;
-+       }
-+
-        if (testcrypt == NULL) {
-                /* crypt() with an invalid salt like "!!" */
-                dropbear_log(LOG_WARNING, "User account '%s' is locked",
-diff --git a/svr-authpubkey.c b/svr-authpubkey.c
-index aa6087c..ff481c8 100644
---- a/svr-authpubkey.c
-+++ b/svr-authpubkey.c
-@@ -79,7 +79,7 @@ static int checkfileperm(char * filename);
- 
- /* process a pubkey auth request, sending success or failure message as
-  * appropriate */
--void svr_auth_pubkey() {
-+void svr_auth_pubkey(int valid_user) {
- 
-        unsigned char testkey; /* whether we're just checking if a key is usable */
-        char* algo = NULL; /* pubkey algo */
-@@ -102,6 +102,15 @@ void svr_auth_pubkey() {
-        keybloblen = buf_getint(ses.payload);
-        keyblob = buf_getptr(ses.payload, keybloblen);
- 
-+       if (!valid_user) {
-+               /* Return failure once we have read the contents of the packet
-+               required to validate a public key. 
-+               Avoids blind user enumeration though it isn't possible to prevent
-+               testing for user existence if the public key is known */
-+               send_msg_userauth_failure(0, 0);
-+               goto out;
-+       }
-+
-        /* check if the key is valid */
-        if (checkpubkey(algo, algolen, keyblob, keybloblen) == DROPBEAR_FAILURE) {
-                send_msg_userauth_failure(0, 0);
diff --git a/meta/recipes-core/dropbear/dropbear_2018.76.bb b/meta/recipes-core/dropbear/dropbear_2018.76.bb
deleted file mode 100644
index 36a58d5cef..0000000000
--- a/meta/recipes-core/dropbear/dropbear_2018.76.bb
+++ /dev/null
@@ -1,5 +0,0 @@
-require dropbear.inc
-
-SRC_URI[md5sum] = "c3912f7fcdcc57c99937e4a79480d2c2"
-SRC_URI[sha256sum] = "f2fb9167eca8cf93456a5fc1d4faf709902a3ab70dd44e352f3acbc3ffdaea65"
-
diff --git a/meta/recipes-core/dropbear/dropbear_2019.77.bb b/meta/recipes-core/dropbear/dropbear_2019.77.bb
new file mode 100644
index 0000000000..d2a71ba647
--- /dev/null
+++ b/meta/recipes-core/dropbear/dropbear_2019.77.bb
@@ -0,0 +1,4 @@
+require dropbear.inc
+
+SRC_URI[md5sum] = "5d4f0256c5d13820b0a3eaadb1a0bc1a"
+SRC_URI[sha256sum] = "d91f78ebe633be1d071fd1b7e5535b9693794048b019e9f4bea257e1992b458d"