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dropbear: enable PAM authentication if linux-pam is selected

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- Disable password file authentication, since it's not possible to have
  both at once.
- Install a /etc/pam.d/sshd file, based on the one installed by openssh.

Signed-off-by: Carlos Santos <casantos@datacom.com.br>
Reviewed-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Carlos Santos 2018-06-29 09:21:09 -03:00 committed by Thomas Petazzoni
parent 5b64a489bf
commit 037b861625
2 changed files with 21 additions and 0 deletions
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14
package/dropbear/dropbear.mk
View File

@ -34,6 +34,19 @@ ifeq ($(BR2_SHARED_STATIC_LIBS),y)
DROPBEAR_CONF_OPTS += --disable-static DROPBEAR_CONF_OPTS += --disable-static
endif endif
ifeq ($(BR2_PACKAGE_LINUX_PAM),y)
define DROPBEAR_SVR_PAM_AUTH
echo '#define DROPBEAR_SVR_PASSWORD_AUTH 0' >> $(@D)/localoptions.h
echo '#define DROPBEAR_SVR_PAM_AUTH 1' >> $(@D)/localoptions.h
endef
define DROPBEAR_INSTALL_PAM_CONF
$(INSTALL) -D -m 644 package/dropbear/etc-pam.d-sshd $(TARGET_DIR)/etc/pam.d/sshd
endef
DROPBEAR_DEPENDENCIES += linux-pam
DROPBEAR_CONF_OPTS += --enable-pam
DROPBEAR_POST_EXTRACT_HOOKS += DROPBEAR_SVR_PAM_AUTH
DROPBEAR_POST_INSTALL_TARGET_HOOKS += DROPBEAR_INSTALL_PAM_CONF
else
# Ensure that dropbear doesn't use crypt() when it's not available # Ensure that dropbear doesn't use crypt() when it's not available
define DROPBEAR_SVR_PASSWORD_AUTH define DROPBEAR_SVR_PASSWORD_AUTH
echo '#if !HAVE_CRYPT' >> $(@D)/localoptions.h echo '#if !HAVE_CRYPT' >> $(@D)/localoptions.h
@ -41,6 +54,7 @@ define DROPBEAR_SVR_PASSWORD_AUTH
echo '#endif' >> $(@D)/localoptions.h echo '#endif' >> $(@D)/localoptions.h
endef endef
DROPBEAR_POST_EXTRACT_HOOKS += DROPBEAR_SVR_PASSWORD_AUTH DROPBEAR_POST_EXTRACT_HOOKS += DROPBEAR_SVR_PASSWORD_AUTH
endif
define DROPBEAR_ENABLE_REVERSE_DNS define DROPBEAR_ENABLE_REVERSE_DNS
echo '#define DO_HOST_LOOKUP 1' >> $(@D)/localoptions.h echo '#define DO_HOST_LOOKUP 1' >> $(@D)/localoptions.h

7
package/dropbear/etc-pam.d-sshd Normal file
View File

@ -0,0 +1,7 @@
#%PAM-1.0
auth required pam_unix.so shadow nodelay
account required pam_nologin.so
account required pam_unix.so
password required pam_unix.so shadow nullok use_authtok
session required pam_unix.so
session required pam_limits.so