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Commit e46c3c12 authored by Deucе's avatar Deucе :ok_hand_tone4:
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If we receive an auth attempt with an unsupported public key type 

(such as ec22519), unconditionally fallback to password auth instead
of the previous behaviour of diconnecting.

Much of the "password then pubkey" mentality is showing in these
bits of Cryptlib.
parent a9ef3e58
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Pipeline #5384 passed
Stage: build
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3rdp/build/GNUmakefile
+ 2
− 1
View file @ e46c3c12
......@@ -88,7 +88,7 @@ $(CRYPT_SRC): | $(3RDPSRCDIR)
$(CRYPT_IDIR): | $(3RDPODIR)
$(QUIET)$(IFNOTEXIST) mkdir $(CRYPT_IDIR)
$(CRYPTLIB_BUILD): $(3RDP_ROOT)/dist/cryptlib.zip $(3RDP_ROOT)/build/cl-fix-test-select.patch $(3RDP_ROOT)/build/cl-terminal-params.patch $(3RDP_ROOT)/build/cl-mingw32-static.patch $(3RDP_ROOT)/build/cl-ranlib.patch $(3RDP_ROOT)/build/cl-win32-noasm.patch $(3RDP_ROOT)/build/cl-zz-country.patch $(3RDP_ROOT)/build/cl-algorithms.patch $(3RDP_ROOT)/build/cl-allow-duplicate-ext.patch $(3RDP_ROOT)/build/cl-macosx-minver.patch $(3RDP_ROOT)/build/cl-posix-me-gently.patch $(3RDP_ROOT)/build/cl-PAM-noprompts.patch $(3RDP_ROOT)/build/cl-zlib.patch $(3RDP_ROOT)/build/cl-Dynamic-linked-static-lib.patch $(3RDP_ROOT)/build/cl-SSL-fix.patch $(3RDP_ROOT)/build/cl-bigger-maxattribute.patch $(3RDP_ROOT)/build/cl-endian.patch $(3RDP_ROOT)/build/cl-vcxproj.patch $(3RDP_ROOT)/build/cl-mingw-vcver.patch $(3RDP_ROOT)/build/cl-win32-build-fix.patch $(3RDP_ROOT)/build/cl-no-odbc.patch $(3RDP_ROOT)/build/cl-noasm-defines.patch $(3RDP_ROOT)/build/cl-bn-noasm64-fix.patch $(3RDP_ROOT)/build/cl-prefer-ECC.patch $(3RDP_ROOT)/build/cl-prefer-ECC-harder.patch $(3RDP_ROOT)/build/cl-clear-GCM-flag.patch $(3RDP_ROOT)/build/cl-use-ssh-ctr.patch $(3RDP_ROOT)/build/cl-ssl-suite-blocksizes.patch $(3RDP_ROOT)/build/cl-no-tpm.patch $(3RDP_ROOT)/build/cl-no-via-aes.patch $(3RDP_ROOT)/build/cl-fix-ssh-ecc-ephemeral.patch $(3RDP_ROOT)/build/cl-just-use-cc.patch $(3RDP_ROOT)/build/cl-no-safe-stack.patch $(3RDP_ROOT)/build/cl-allow-pkcs12.patch $(3RDP_ROOT)/build/cl-openbsd-threads.patch $(3RDP_ROOT)/build/cl-allow-none-auth.patch $(3RDP_ROOT)/build/cl-mingw-add-m32.patch $(3RDP_ROOT)/build/cl-poll-not-select.patch $(3RDP_ROOT)/build/cl-good-sockets.patch $(3RDP_ROOT)/build/cl-moar-objects.patch $(3RDP_ROOT)/build/cl-server-term-support.patch $(3RDP_ROOT)/build/cl-add-pubkey-attribute.patch $(3RDP_ROOT)/build/cl-allow-ssh-auth-retries.patch $(3RDP_ROOT)/build/cl-fix-ssh-channel-close.patch $(3RDP_ROOT)/build/cl-vt-lt-2005-always-defined.patch $(3RDP_ROOT)/build/cl-no-pie.patch $(3RDP_ROOT)/build/cl-no-testobjs.patch $(3RDP_ROOT)/build/cl-win32-lean-and-mean.patch $(3RDP_ROOT)/build/cl-thats-not-asm.patch $(3RDP_ROOT)/build/cl-make-channels-work.patch $(3RDP_ROOT)/build/cl-allow-ssh-2.0-go.patch $(3RDP_ROOT)/build/cl-read-timeout-every-time.patch $(3RDP_ROOT)/build/cl-allow-servercheck-pubkeys.patch $(3RDP_ROOT)/build/cl-pass-after-pubkey.patch $(3RDP_ROOT)/build/cl-ssh-list-ctr-modes.patch $(3RDP_ROOT)/build/cl-double-delete-fine-on-close.patch | $(CRYPT_SRC) $(CRYPT_IDIR) $(3RDP_ROOT)/build/cl-remove-march.patch
$(CRYPTLIB_BUILD): $(3RDP_ROOT)/dist/cryptlib.zip $(3RDP_ROOT)/build/cl-fix-test-select.patch $(3RDP_ROOT)/build/cl-terminal-params.patch $(3RDP_ROOT)/build/cl-mingw32-static.patch $(3RDP_ROOT)/build/cl-ranlib.patch $(3RDP_ROOT)/build/cl-win32-noasm.patch $(3RDP_ROOT)/build/cl-zz-country.patch $(3RDP_ROOT)/build/cl-algorithms.patch $(3RDP_ROOT)/build/cl-allow-duplicate-ext.patch $(3RDP_ROOT)/build/cl-macosx-minver.patch $(3RDP_ROOT)/build/cl-posix-me-gently.patch $(3RDP_ROOT)/build/cl-PAM-noprompts.patch $(3RDP_ROOT)/build/cl-zlib.patch $(3RDP_ROOT)/build/cl-Dynamic-linked-static-lib.patch $(3RDP_ROOT)/build/cl-SSL-fix.patch $(3RDP_ROOT)/build/cl-bigger-maxattribute.patch $(3RDP_ROOT)/build/cl-endian.patch $(3RDP_ROOT)/build/cl-vcxproj.patch $(3RDP_ROOT)/build/cl-mingw-vcver.patch $(3RDP_ROOT)/build/cl-win32-build-fix.patch $(3RDP_ROOT)/build/cl-no-odbc.patch $(3RDP_ROOT)/build/cl-noasm-defines.patch $(3RDP_ROOT)/build/cl-bn-noasm64-fix.patch $(3RDP_ROOT)/build/cl-prefer-ECC.patch $(3RDP_ROOT)/build/cl-prefer-ECC-harder.patch $(3RDP_ROOT)/build/cl-clear-GCM-flag.patch $(3RDP_ROOT)/build/cl-use-ssh-ctr.patch $(3RDP_ROOT)/build/cl-ssl-suite-blocksizes.patch $(3RDP_ROOT)/build/cl-no-tpm.patch $(3RDP_ROOT)/build/cl-no-via-aes.patch $(3RDP_ROOT)/build/cl-fix-ssh-ecc-ephemeral.patch $(3RDP_ROOT)/build/cl-just-use-cc.patch $(3RDP_ROOT)/build/cl-no-safe-stack.patch $(3RDP_ROOT)/build/cl-allow-pkcs12.patch $(3RDP_ROOT)/build/cl-openbsd-threads.patch $(3RDP_ROOT)/build/cl-allow-none-auth.patch $(3RDP_ROOT)/build/cl-mingw-add-m32.patch $(3RDP_ROOT)/build/cl-poll-not-select.patch $(3RDP_ROOT)/build/cl-good-sockets.patch $(3RDP_ROOT)/build/cl-moar-objects.patch $(3RDP_ROOT)/build/cl-server-term-support.patch $(3RDP_ROOT)/build/cl-add-pubkey-attribute.patch $(3RDP_ROOT)/build/cl-allow-ssh-auth-retries.patch $(3RDP_ROOT)/build/cl-fix-ssh-channel-close.patch $(3RDP_ROOT)/build/cl-vt-lt-2005-always-defined.patch $(3RDP_ROOT)/build/cl-no-pie.patch $(3RDP_ROOT)/build/cl-no-testobjs.patch $(3RDP_ROOT)/build/cl-win32-lean-and-mean.patch $(3RDP_ROOT)/build/cl-thats-not-asm.patch $(3RDP_ROOT)/build/cl-make-channels-work.patch $(3RDP_ROOT)/build/cl-allow-ssh-2.0-go.patch $(3RDP_ROOT)/build/cl-read-timeout-every-time.patch $(3RDP_ROOT)/build/cl-allow-servercheck-pubkeys.patch $(3RDP_ROOT)/build/cl-pass-after-pubkey.patch $(3RDP_ROOT)/build/cl-ssh-list-ctr-modes.patch $(3RDP_ROOT)/build/cl-double-delete-fine-on-close.patch $(3RDP_ROOT)/build/cl-handle-unsupported-pubkey.patch | $(CRYPT_SRC) $(CRYPT_IDIR) $(3RDP_ROOT)/build/cl-remove-march.patch
@echo Creating $@ ...
$(QUIET)-rm -rf $(CRYPT_SRC)/*
$(QUIET)unzip -oa $(3RDPDISTDIR)/cryptlib.zip -d $(CRYPT_SRC)
......@@ -149,6 +149,7 @@ $(CRYPTLIB_BUILD): $(3RDP_ROOT)/dist/cryptlib.zip $(3RDP_ROOT)/build/cl-fix-test
$(QUIET)patch -b -p0 -d $(CRYPT_SRC) < cl-pass-after-pubkey.patch
$(QUIET)patch -b -p0 -d $(CRYPT_SRC) < cl-allow-servercheck-pubkeys.patch
$(QUIET)patch -b -p0 -d $(CRYPT_SRC) < cl-double-delete-fine-on-close.patch
$(QUIET)patch -b -p0 -d $(CRYPT_SRC) < cl-handle-unsupported-pubkey.patch
ifeq ($(os),win32)
$(QUIET)cd $(CRYPT_SRC) && env - PATH="$(PATH)" CC="$(CC)" AR="$(AR)" RANLIB="$(RANLIB)" make directories
$(QUIET)cd $(CRYPT_SRC) && env - PATH="$(PATH)" CC="$(CC)" AR="$(AR)" RANLIB="$(RANLIB)" make toolscripts
......
3rdp/build/cl-handle-unsupported-pubkey.patch 0 → 100644
+ 51
− 0
View file @ e46c3c12
--- session/ssh2_authsvr.c.orig 2024-01-21 22:30:02.886716000 -0500
+++ session/ssh2_authsvr.c 2024-01-21 22:32:54.203440000 -0500
@@ -443,8 +443,11 @@
}
if( cryptStatusError( status ) )
{
- retExt( CRYPT_ERROR_BADDATA,
- ( CRYPT_ERROR_BADDATA, SESSION_ERRINFO,
+ if (status == CRYPT_ERROR_NOTAVAIL) {
+ return status;
+ }
+ retExt( status,
+ ( status, SESSION_ERRINFO,
"Invalid client pubkey data" ) );
}
@@ -880,6 +883,12 @@
case SSH_AUTHTYPE_PUBKEY:
/* Read the public key */
status = readPublicKey( sessionInfoPtr, &stream );
+ if (status == CRYPT_ERROR_NOTAVAIL)
+ {
+ sendResponseFailureInfo( sessionInfoPtr, FALSE );
+ *userAuthInfo = USERAUTH_NOOP_2;
+ return( status );
+ }
if( cryptStatusError( status ) )
{
sMemDisconnect( &stream );
@@ -1172,7 +1181,6 @@
continue with a password auth */
if( credentialType == CREDENTIAL_USERNAME_PUBKEY )
{
- sMemDisconnect( &stream );
( void ) sendResponseFailure( sessionInfoPtr );
retExt( CRYPT_ERROR_BADDATA,
( CRYPT_ERROR_BADDATA, SESSION_ERRINFO,
@@ -1455,6 +1463,13 @@
status = processUserAuth( sessionInfoPtr, handshakeInfo,
&userAuthInfo,
CREDENTIAL_USERNAME_PUBKEY, FALSE );
+ }
+ if( status == CRYPT_ERROR_NOTAVAIL && userAuthInfo == USERAUTH_NOOP_2 )
+ {
+ /* We can't understand the public key and are falling back to password */
+ status = processUserAuth( sessionInfoPtr, handshakeInfo,
+ &userAuthInfo,
+ CREDENTIAL_USERNAME, FALSE );
}
}
else
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