Caitlin Condon
27 lines
907 B
Markdown
27 lines
907 B
Markdown
# Description
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## How to decode Base64 with Metasploit::Framework::Compiler
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The Metasploit C compiler has built-in support for Base64 encoding and decoding, which is implemented as `base64.h`.
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# Code Example
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```c
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#include <Windows.h>
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#include <String.h>
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#include <base64.h>
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// "Hello World" encoded by Rex::Text.encode_base64()
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#define BASE64STR "aGVsbG8gd29ybGQ="
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int main() {
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int base64StrLen = strlen(BASE64STR);
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LPVOID lpBuf = VirtualAlloc(NULL, sizeof(int) * base64StrLen, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
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memset(lpBuf, '\0', base64StrLen);
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base64decode(lpBuf, BASE64STR, base64StrLen);
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MessageBox(NULL, (char*) lpBuf, "Base64 Test", MB_OK);
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return 0;
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}
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```
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To compile, use [How to use Metasploit::Framework::Compiler::Windows to compile C code](https://github.com/rapid7/metasploit-framework/wiki/How-to-use-Metasploit%3A%3AFramework%3A%3ACompiler%3A%3AWindows-to-compile-C-code) |