119 lines
3.1 KiB
C++
119 lines
3.1 KiB
C++
#include <Windows.h>
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extern "C" {
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#include "tiny/edsign.h"
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#include "nsis/pluginapi.h"
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#include "tiny/sha512.h"
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}
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// To work with Unicode version of NSIS, please use TCHAR-type
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// functions for accessing the variables and the stack.
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unsigned char buffer[4096];
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#include "../../../misc/config/installer_signing_key_pub.h"
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int CheckFile(char *file) {
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sha512_state ctx;
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int ret;
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HANDLE h;
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unsigned char out[64];
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unsigned char signature[64];
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h = CreateFileA(file, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (h == INVALID_HANDLE_VALUE)
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return 1;
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DWORD n;
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sha512_init(&ctx);
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size_t total_size = 0;
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size_t p = 0;
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while (ReadFile(h, buffer, sizeof(buffer), &n, NULL) && n) {
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total_size += n;
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p = 0;
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while (p + 128 <= n) {
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sha512_block(&ctx, buffer + p);
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p += 128;
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}
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if (p != n)
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break;
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}
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sha512_final(&ctx, buffer + p, total_size);
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sha512_get(&ctx, out, 0, 64);
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CloseHandle(h);
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/*
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for (size_t i = 0; i < 64; i++) {
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buffer[i * 2 + 0] = "0123456789abcdef"[out[i] >> 4];
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buffer[i * 2 + 1] = "0123456789abcdef"[out[i] & 0xF];
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}
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buffer[128] = 0;
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MessageBoxA(0, (char*)buffer, "sha", 0);
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*/
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char *x = file;
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while (*x)x++;
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memcpy(x, ".sig", 5);
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h = CreateFileA(file, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (h == INVALID_HANDLE_VALUE)
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return 2;
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n = 0;
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ReadFile(h, buffer, sizeof(buffer), &n, NULL);
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CloseHandle(h);
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if (n < 128)
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return 3;
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memset(signature, 0, sizeof(signature));
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for (int i = 0; i < 128; i++) {
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unsigned char c = buffer[i];
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if (c >= '0' && c <= '9')
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c -= '0';
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else if ((c |= 32), c >= 'a' && c <= 'f')
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c -= 'a' - 10;
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else
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return 4;
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signature[i >> 1] = (signature[i >> 1] << 4) + c;
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}
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/* create a random seed, and a keypair out of that seed */
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//ed25519_create_seed(seed);
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//ed25519_create_keypair(public_key, private_key, seed);
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/* create signature on the message with the keypair */
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//ed25519_sign(signature, message, message_len, public_key, private_key);
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/* verify the signature */
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return edsign_verify(signature, pk, out, sizeof(out)) ? 0 : 5;
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}
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extern "C" void __declspec(dllexport) myFunction(HWND hwndParent, int string_size,
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LPTSTR variables, stack_t **stacktop,
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extra_parameters *extra, ...) {
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EXDLL_INIT();
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int rv = 10;
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// note if you want parameters from the stack, pop them off in order.
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// i.e. if you are called via exdll::myFunction file.dat read.txt
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// calling popstring() the first time would give you file.dat,
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// and the second time would give you read.txt.
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// you should empty the stack of your parameters, and ONLY your
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// parameters.
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// do your stuff here
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{
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LPTSTR msgbuf = (LPTSTR)GlobalAlloc(GPTR, (string_size + 1 + 10) * sizeof(*msgbuf));
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if (msgbuf) {
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if (!popstring(msgbuf)) {
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rv = CheckFile(msgbuf);
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}
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GlobalFree(msgbuf);
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}
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}
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pushint(rv);
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}
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BOOL WINAPI DllMain(HINSTANCE hInst, ULONG ul_reason_for_call, LPVOID lpReserved) {
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return TRUE;
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}
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