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jeb-samplecode/scripts/JavaASTCreateMethodRef.py at master · pnfsoftware/jeb-samplecode · GitHub
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scripts
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JavaASTCreateMethodRef.py
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scripts
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JavaASTCreateMethodRef.py
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#?description=Show how the Java AST API can be used to modify and create elements in a decompiled syntax tree
#?shortcut=
import
time
from
com
.
pnfsoftware
.
jeb
.
client
.
api
import
IScript
from
com
.
pnfsoftware
.
jeb
.
core
.
units
.
code
.
java
import
IJavaSourceUnit
"""
Sample script for JEB Decompiler.
The script shows how to use the Java factory to create an external method reference (also available for fields),
create a new statement (here, a call to 'new String("...")'), and replace an arbitrary selected statement
(index 0 in the currently selected method) by the new statement.
- Open an APK/DEX, decompile any class or method
- In the Decompiled view, position the caret somewhere in a method
- Execute the script
"""
class
JavaASTCreateMethodRef
(
IScript
):
def
run
(
self
,
ctx
):
# retrieve the currently active UI fragment (make sure to select a Decompiled Java fragment)
f
=
ctx
.
getFocusedFragment
()
assert
f
,
'Need a focused fragment'
unit
=
f
.
getUnit
()
assert
isinstance
(
unit
,
IJavaSourceUnit
),
'Need a java unit'
# a DEX-style address: TYPENAME->METHODNAME(PARAMTYPES)RETTYPE+OFFSET
addr
=
f
.
getActiveAddress
()
# IDexDecompilerUnit
dexdec
=
unit
.
getParent
()
pos
=
addr
.
find
(
'+'
)
if
pos
>=
0
:
addr
=
addr
[:
pos
]
# retrieve the already decompiled IJavaMethod on caret
_m
=
dexdec
.
getMethod
(
addr
)
# method body...
_blk
=
_m
.
getBody
()
# we pick the first statement
_stm0
=
_blk
.
get
(
0
)
print
(
'Will replace statement: "%s"'
%
_stm0
)
# IJavaFactories
self
.
jfactory
=
dexdec
.
getHighLevelContext
()
# now, replace that first method statement by a call to 'new String("...")'
if
self
.
replaceStatement
(
_blk
,
_stm0
):
unit
.
notifyGenericChange
()
def
replaceStatement
(
self
,
parent
,
e
):
m
=
self
.
jfactory
.
createMethodReference
(
'Ljava/lang/String;-><init>(Ljava/lang/String;)V'
,
False
)
t
=
self
.
jfactory
.
getTypeFactory
().
createType
(
'Ljava/lang/String;'
)
args
=
[
self
.
jfactory
.
getConstantFactory
().
createString
(
'FOOBAR__'
+
str
(
time
.
time
()))]
stm
=
self
.
jfactory
.
createNew
(
t
,
m
,
args
)
return
parent
.
replaceSubElement
(
e
,
stm
)
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