setresuid: generic implementation for all arches (#2093)

* setresuid: generic implementation for all arches

Closes #1324

* Update changelog

Author: Arusekk

CHANGELOG.md

@@ -68,9 +68,11 @@ The table below shows which release corresponds to each branch, and what date th
 
 - [#2062][2062] make pwn cyclic -l work with entry larger than 4 bytes
 - [#2092][2092] shellcraft: dup() is now called dupio() consistently across all supported arches
+- [#2093][2093] setresuid() in shellcraft uses current euid by default
 
 [2062]: https://github.com/Gallopsled/pwntools/pull/2062
 [2092]: https://github.com/Gallopsled/pwntools/pull/2092
+[2093]: https://github.com/Gallopsled/pwntools/pull/2093
 
 ## 4.9.0 (`beta`)
 

pwnlib/shellcraft/templates/aarch64/linux/setresuid.asm

@@ -0,0 +1,18 @@
+<% from pwnlib.shellcraft import common %>
+<% from pwnlib.shellcraft.aarch64 import mov, linux %>
+<%page args="ruid=None, euid=None, suid=None"/>
+<%docstring>
+Args: [ruid = geteuid(), euid = ruid, suid = ruid]
+    Sets real, effective and saved user ids to given values
+</%docstring>
+
+%if ruid is None:
+${linux.geteuid()}
+<% ruid = 'x0' %>
+%endif
+<%
+ if euid is None: euid = ruid
+ if suid is None: suid = ruid
+%>
+
+${linux.syscalls.setresuid(ruid, euid, suid)}

pwnlib/shellcraft/templates/amd64/linux/setresuid.asm

@@ -0,0 +1,18 @@
+<% from pwnlib.shellcraft import common %>
+<% from pwnlib.shellcraft.amd64 import mov, linux %>
+<%page args="ruid=None, euid=None, suid=None"/>
+<%docstring>
+Args: [ruid = geteuid(), euid = ruid, suid = ruid]
+    Sets real, effective and saved user ids to given values
+</%docstring>
+
+%if ruid is None:
+${linux.geteuid()}
+<% ruid = 'eax' %>
+%endif
+<%
+ if euid is None: euid = ruid
+ if suid is None: suid = ruid
+%>
+
+${linux.syscalls.setresuid(ruid, euid, suid)}

pwnlib/shellcraft/templates/arm/linux/setresuid.asm

@@ -0,0 +1,18 @@
+<% from pwnlib.shellcraft import common %>
+<% from pwnlib.shellcraft.arm import mov, linux %>
+<%page args="ruid=None, euid=None, suid=None"/>
+<%docstring>
+Args: [ruid = geteuid(), euid = ruid, suid = ruid]
+    Sets real, effective and saved user ids to given values
+</%docstring>
+
+%if ruid is None:
+${linux.geteuid()}
+<% ruid = 'r0' %>
+%endif
+<%
+ if euid is None: euid = ruid
+ if suid is None: suid = ruid
+%>
+
+${linux.syscalls.setresuid(ruid, euid, suid)}

pwnlib/shellcraft/templates/i386/linux/setresuid.asm

@@ -0,0 +1,18 @@
+<% from pwnlib.shellcraft import common %>
+<% from pwnlib.shellcraft.i386 import mov, linux %>
+<%page args="ruid=None, euid=None, suid=None"/>
+<%docstring>
+Args: [ruid = geteuid(), euid = ruid, suid = ruid]
+    Sets real, effective and saved user ids to given values
+</%docstring>
+
+%if ruid is None:
+${linux.geteuid()}
+<% ruid = 'eax' %>
+%endif
+<%
+ if euid is None: euid = ruid
+ if suid is None: suid = ruid
+%>
+
+${linux.syscalls.setresuid(ruid, euid, suid)}

pwnlib/shellcraft/templates/mips/linux/setresuid.asm

@@ -0,0 +1,18 @@
+<% from pwnlib.shellcraft import common %>
+<% from pwnlib.shellcraft.mips import mov, linux %>
+<%page args="ruid=None, euid=None, suid=None"/>
+<%docstring>
+Args: [ruid = geteuid(), euid = ruid, suid = ruid]
+    Sets real, effective and saved user ids to given values
+</%docstring>
+
+%if ruid is None:
+${linux.geteuid()}
+<% ruid = '$v0' %>
+%endif
+<%
+ if euid is None: euid = ruid
+ if suid is None: suid = ruid
+%>
+
+${linux.syscalls.setresuid(ruid, euid, suid)}

pwnlib/shellcraft/templates/thumb/linux/setresuid.asm

@@ -0,0 +1,18 @@
+<% from pwnlib.shellcraft import common %>
+<% from pwnlib.shellcraft.thumb import mov, linux %>
+<%page args="ruid=None, euid=None, suid=None"/>
+<%docstring>
+Args: [ruid = geteuid(), euid = ruid, suid = ruid]
+    Sets real, effective and saved user ids to given values
+</%docstring>
+
+%if ruid is None:
+${linux.geteuid()}
+<% ruid = 'r0' %>
+%endif
+<%
+ if euid is None: euid = ruid
+ if suid is None: suid = ruid
+%>
+
+${linux.syscalls.setresuid(ruid, euid, suid)}