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QWORD upgrade 2/3

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This commit is contained in:
Andrew 2023-06-05 01:24:20 +03:00
parent 632c84249c
commit 35c18d473b
1 changed files with 17 additions and 16 deletions
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33
src/server.cpp
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@ -10,7 +10,7 @@ void unpackServer(
DWORD (&pRaw)[4],
DWORD &pChannelID,
DWORD &pHash,
DWORD (&pSignature)[2],
QWORD &pSignature,
DWORD &pAuthInfo
) {
// We're assuming that the quantity of information within the product key is at most 114 bits.
@ -23,8 +23,7 @@ void unpackServer(
pHash = ((pRaw[0] >> 11) | (pRaw[1] << 21)) & 0x7fffffff;
// Signature = Bits [42..103] -> 62 bits
pSignature[0] = (pRaw[1] >> 10) | (pRaw[2] << 22);
pSignature[1] = ((pRaw[2] >> 10) | (pRaw[3] << 22)) & 0x3fffffff;
pSignature = (((QWORD)pRaw[2] >> 10 | (QWORD)pRaw[3] << 22) & 0x3fffffff) << 32 | (pRaw[1] >> 10) | (pRaw[2] << 22);
// Prefix = Bits [104..113] -> 10 bits
pAuthInfo = (pRaw[3] >> 8) & 0x3ff;
@ -34,13 +33,13 @@ void packServer(
DWORD (&pRaw)[4],
DWORD pChannelID,
DWORD pHash,
DWORD (&pSignature)[2],
QWORD &pSignature,
DWORD pAuthInfo
) {
pRaw[0] = pChannelID | (pHash << 11);
pRaw[1] = (pHash >> 21) | (pSignature[0] << 10);
pRaw[2] = (pSignature[0] >> 22) | (pSignature[1] << 10);
pRaw[3] = (pSignature[1] >> 22) | (pAuthInfo << 8);
pRaw[1] = (pHash >> 21) | pSignature << 10;
pRaw[2] = (DWORD)(pSignature >> 22);
pRaw[3] = pSignature >> 54 | (pAuthInfo << 8);
}
@ -48,9 +47,11 @@ bool verifyServerKey(EC_GROUP *eCurve, EC_POINT *generator, EC_POINT *publicKey,
BN_CTX *context = BN_CTX_new();
// Convert Base24 CD-key to bytecode.
DWORD pChannelID, pHash, pSignature[2], pAuthInfo;
DWORD pChannelID, pHash, pAuthInfo;
DWORD bKey[4]{};
QWORD pSignature = 0;
unbase24((BYTE *)bKey, cdKey);
// Extract segments from the bytecode and reverse the signature.
@ -80,7 +81,7 @@ bool verifyServerKey(EC_GROUP *eCurve, EC_POINT *generator, EC_POINT *publicKey,
BIGNUM *x = BN_new();
BIGNUM *y = BN_new();
BIGNUM *s = BN_lebin2bn((BYTE *)pSignature, sizeof(pSignature), nullptr);
BIGNUM *s = BN_lebin2bn((BYTE *)&pSignature, sizeof(pSignature), nullptr);
BIGNUM *e = BN_lebin2bn((BYTE *)&newHash, sizeof(newHash), nullptr);
EC_POINT *u = EC_POINT_new(eCurve);
@ -143,8 +144,9 @@ void generateServerKey(char *pKey, EC_GROUP *eCurve, EC_POINT *generator, BIGNUM
EC_POINT *r = EC_POINT_new(eCurve);
BN_CTX *ctx = BN_CTX_new();
DWORD bKey[4]{},
bSig[2]{};
DWORD bKey[4]{};
QWORD pSignature = 0;
do {
BIGNUM *c = BN_new();
@ -156,7 +158,6 @@ void generateServerKey(char *pKey, EC_GROUP *eCurve, EC_POINT *generator, BIGNUM
DWORD hash = 0, h[2]{};
memset(bKey, 0, 4);
memset(bSig, 0, 2);
// Generate a random number c consisting of 512 bits without any constraints.
BN_rand(c, FIELD_BITS_2003, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY);
@ -281,18 +282,18 @@ void generateServerKey(char *pKey, EC_GROUP *eCurve, EC_POINT *generator, BIGNUM
BN_rshift1(s, s);
// Convert s from BigNum back to bytecode and reverse the endianness.
BN_bn2bin(s, (BYTE *)bSig);
endian((BYTE *)bSig, BN_num_bytes(s));
BN_bn2bin(s, (BYTE *)&pSignature);
endian((BYTE *)&pSignature, BN_num_bytes(s));
// Pack product key.
packServer(bKey, *osFamily, hash, bSig, *prefix);
packServer(bKey, *osFamily, hash, pSignature, *prefix);
BN_free(c);
BN_free(s);
BN_free(x);
BN_free(y);
BN_free(b);
} while (bSig[1] >= 0x40000000);
} while ((pSignature >> 32) >= 0x40000000);
base24(pKey, (BYTE *)bKey);