Rev Idapython

# rev-idapython - IDAPython / IDALib Script Reference

IDAPython script snippets for IDA interactive use and IDALib headless analysis. Use as reference when generating IDAPython code.

- **IDAPython**: scripts run inside IDA GUI (Script Command, plugin, or IDC console)
- **IDALib**: headless mode introduced in IDA 9.0 — run analysis scripts without opening the IDA GUI

---

## Common API

### Register Operations

```python
idc.get_reg_value('rax')
idaapi.set_reg_val("rax", 1234)
```

### Debug Memory Operations

```python
idc.read_dbg_byte(addr)
idc.read_dbg_memory(addr, size)
idc.read_dbg_dword(addr)
idc.read_dbg_qword(addr)
idc.patch_dbg_byte(addr, val)
idc.add_bpt(0x409437)          # add breakpoint
idaapi.get_imagebase()         # get image base address
```

### Local Memory Operations (modifies IDB database)

```python
idc.get_qword(addr)
idc.patch_qword(addr, val)
idc.patch_dword(addr, val)
idc.patch_word(addr, val)
idc.patch_byte(addr, val)
idc.get_db_byte(addr)
idc.get_bytes(addr, size)
idaapi.get_dword(addr)
idc.get_strlit_contents          # read string literal
```

### Disassembly

```python
GetDisasm(addr)                  # get disassembly text
idc.next_head(ea)                # get next instruction address
idc.create_insn(addr)            # c, Make Code
ida_bytes.create_strlit          # create string, same as 'A' key
ida_funcs.add_func(addr)         # p, create function
idc.del_items(addr)              # U, undefine
```

### Address Conversion

```python
idc.get_name_ea(0, '_sub_6051')  # get address by function name
```

### Function Operations

```python
ida_funcs.get_func(ea)           # get function descriptor

# enumerate all functions
for func in idautils.Functions():
    print("0x%x, %s" % (func, idc.get_func_name(func)))
```

---

## Code Snippets

### Byte Pattern Search

```python
import ida_bytes
import ida_idaapi
import ida_funcs
import idc

# find_bytes_list("90 90 90 90 90")
# find_bytes_list("55 ??")
# returns list of matching addresses
def find_bytes_list(bytes_pattern):
    ea = -1
    result = []
    while True:
        ea = idc.find_bytes(bytes_pattern, ea + 1)
        if ea == ida_idaapi.BADADDR:
            break
        result.append(ea)
    return result
```

### Appcall - Call Debuggee Functions

```python
# test check_passwd(char *passwd) -> int
passwd = ida_idd.Appcall.byref("MyFirstGuess")
res = ida_idd.Appcall.check_passwd(passwd)
if res.value == 0:
  print("Good passwd !")
else:
  print("Bad passwd...")
```

```python
# Explicitly create the buffer as a byref object
s_in = Appcall.byref("SomeEncryptedBuffer")
# Buffers are always returned byref
s_out = Appcall.buffer(" ", SizeOfBuffer)
# Call the debuggee
Appcall.decrypt_buffer(s_in, s_out, SizeOfBuffer)
# Print the result
print "decrypted=", s_out.value
```

```python
loadlib = Appcall.proto("kernel32_LoadLibraryA", "int __stdcall loadlib(const char *fn);")
hmod = loadlib("dll_to_inject.dll")

getlasterror = Appcall.proto("kernel32_GetLastError", "DWORD __stdcall GetLastError();")
print "lasterror=", getlasterror()

getcmdline = Appcall.proto("kernel32_GetCommandLineA", "const char *__stdcall getcmdline();")
print "command line:", getcmdline()
```

### Cross References

```python
for ref in idautils.XrefsTo(ea):
    print(hex(ref.frm))

# shorthand
[ref.frm for ref in idautils.XrefsTo(start_ea)]
```

### Basic Block Traversal

```python
fn = 0x4800
f_blocks = idaapi.FlowChart(idaapi.get_func(fn), flags=idaapi.FC_PREDS)
for block in f_blocks:
    print(hex(block.start_ea))
```

```python
# successor blocks
for succ in block.succs():
    print he