mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 10:19:47 -04:00
Matthew Stanley
44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
#ifndef PSX_EXECUTION_IDENTITY_H
|
|
#define PSX_EXECUTION_IDENTITY_H
|
|
#include "execution_profile.h"
|
|
#include "psx_sha256.h"
|
|
#include <string.h>
|
|
|
|
/* Bind every network session, including a no-mod LAN session, to its fixed
|
|
* execution implementation. Empty profile IDs retain legacy fixture behavior.
|
|
* Validate before hashing so malformed content cannot become a valid digest. */
|
|
static inline int psx_execution_content_identity(const char* content, char out[65]) {
|
|
const char* input = content ? content : "";
|
|
char normalized[65];
|
|
size_t n = strlen(input);
|
|
if (n && n != 64) return 0;
|
|
for (size_t i = 0; i < n; ++i) {
|
|
char c = input[i];
|
|
if (c >= 'A' && c <= 'F') c += 'a' - 'A';
|
|
if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f'))) return 0;
|
|
normalized[i] = c;
|
|
}
|
|
normalized[n] = 0;
|
|
input = normalized;
|
|
if (!PSX_EXECUTION_ID[0]) {
|
|
memcpy(out, input, n + 1);
|
|
return 1;
|
|
}
|
|
psx_sha256_ctx ctx;
|
|
uint8_t bytes[32];
|
|
const char salt[] = "psx-session-execution-v1:";
|
|
const char hex[] = "0123456789abcdef";
|
|
psx_sha256_init(&ctx);
|
|
psx_sha256_update(&ctx, (const uint8_t*)salt, sizeof(salt) - 1);
|
|
psx_sha256_update(&ctx, (const uint8_t*)PSX_EXECUTION_ID, strlen(PSX_EXECUTION_ID));
|
|
psx_sha256_update(&ctx, (const uint8_t*)input, n);
|
|
psx_sha256_final(&ctx, bytes);
|
|
for (unsigned i = 0; i < 32; ++i) {
|
|
out[2*i] = hex[bytes[i] >> 4];
|
|
out[2*i+1] = hex[bytes[i] & 15];
|
|
}
|
|
out[64] = 0;
|
|
return 1;
|
|
}
|
|
#endif
|