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Fixed a steamid collision in some cases due to a short authkey length limit 31

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This commit is contained in:
s1lentq 2024-06-27 21:32:38 +07:00
parent feacae5c3d
commit 5fec1febb1
2 changed files with 5 additions and 10 deletions
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11
reunion/src/reunion_authorizers.cpp
View File

@ -48,13 +48,11 @@ static uint32_t revHash(const char* str)
return hash;
}
void RevEmuFinishAuthorization(authdata_t* authdata, const char* authStr, bool stripSpecialChars)
void RevEmuFinishAuthorization(authdata_t* authdata, const char* authStr, size_t authKeyMaxLen, bool stripSpecialChars)
{
size_t authKeyMaxLen = g_ReunionConfig->getAuthVersion() >= av_reunion2018 ? MAX_AUTHKEY_LEN : MAX_AUTHKEY_LEN_OLD;
uint32_t volumeId;
char hddsn[256];
bool authVolumeId = false;
if (IsHddsnNumber(authStr)) {
authdata->authKeyKind = AK_HDDSN;
@ -77,7 +75,6 @@ void RevEmuFinishAuthorization(authdata_t* authdata, const char* authStr, bool s
volumeId = strtoul(authStr, nullptr, 10) & 0x7FFFFFFF;
authdata->authKeyLen = volumeId ? sizeof(volumeId) : 0; // can't be zero
authStr = (char *)&volumeId;
authVolumeId = true;
}
else
authdata->authKeyLen = min(strlen(authStr), authKeyMaxLen);
@ -91,7 +88,7 @@ void RevEmuFinishAuthorization(authdata_t* authdata, const char* authStr, bool s
authdata->steamId = revHash(authdata->authKey) << 1;
if (authVolumeId)
if (authStr == (char *)&volumeId)
LCPrintf(false, "RevEmu auth key: '%u' steamid: %u\n", (uint32_t)authStr, authdata->steamId);
else
LCPrintf(false, "RevEmu auth key: '%s' steamid: %u\n", authStr, authdata->steamId);
@ -147,7 +144,7 @@ bool RevEmu2009to2013Authorize(ticket_t* ticket, authdata_t* authdata)
return false;
}
RevEmuFinishAuthorization(authdata, DecryptedAuthData, g_ReunionConfig->isSC2009RevEmuCompat() || g_ReunionConfig->getAuthVersion() >= av_reunion2018);
RevEmuFinishAuthorization(authdata, DecryptedAuthData, sizeof DecryptedAuthData - 1, g_ReunionConfig->isSC2009RevEmuCompat() || g_ReunionConfig->getAuthVersion() >= av_reunion2018);
return true;
}
@ -239,7 +236,7 @@ client_auth_kind CRevEmuAuthorizer::authorize(authdata_t* authdata)
return CA_UNKNOWN;
}
RevEmuFinishAuthorization(authdata, ticket->TicketBuf, g_ReunionConfig->getAuthVersion() >= av_reunion2018);
RevEmuFinishAuthorization(authdata, ticket->TicketBuf, sizeof ticket->TicketBuf - 1, g_ReunionConfig->getAuthVersion() >= av_reunion2018);
return CA_REVEMU;
}

4
reunion/src/reunion_shared.h
View File

@ -9,10 +9,8 @@
#define STEAM_ID_LAN 0
#define STEAM_ID_PENDING 1
#define MAX_STEAMIDSALTLEN 64
#define MAX_AUTHKEY_LEN 31
#define MAX_AUTHKEY_LEN_OLD 16
#define MAX_AUTHKEY_LEN 128
#define MAX_HASHDATA_LEN (4 + MAX_STEAMIDSALTLEN + MAX_AUTHKEY_LEN)
//#define MAX_HASHDATA_LEN_OLD (4 + MAX_STEAMIDSALTLEN + MAX_AUTHKEY_LEN_OLD)
#define IPGEN_KEY 0xA95CE2B9
#define LOG_PREFIX "[REUNION]: "