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Endian fix

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This commit is contained in:
jl777
2018-07-29 22:19:18 -11:00
parent d176d2df4f
commit ae748eaf3f
1 changed files with 20 additions and 4 deletions
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24
src/cc/dice.cpp
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@@ -26,10 +26,24 @@
2. and 3. can be done in mempool 2. and 3. can be done in mempool
*/ */
uint256 DiceHashEntropy(uint256 &entropy,uint256 txidpriv) // assumes little endian CPU and max 1 vout per txid used #include "../endian.h"
void endiancpy(uint8_t *dest,uint8_t *src,int32_t len)
{ {
int32_t i; bits256 tmp256,txidpub,mypriv,mypub,ssecret,ssecret2; uint256 hentropy; int32_t i,j=0;
#if defined(WORDS_BIGENDIAN)
for (i=31; i>=0; i--)
dest[j++] = src[i];
#else
memcpy(dest,src,len);
#endif
}
uint256 DiceHashEntropy(uint256 &entropy,uint256 _txidpriv) // assumes little endian and max 1 vout per txid used
{
int32_t i; uint8_t _entropy[32],_hentropy[32]; bits256 tmp256,txidpub,txidpriv,mypriv,mypub,ssecret,ssecret2; uint256 hentropy;
memset(&hentropy,0,32); memset(&hentropy,0,32);
endiancpy(txidpriv.bytes,&txidpriv,32);
txidpriv.bytes[0] &= 0xf8, txidpriv.bytes[31] &= 0x7f, txidpriv.bytes[31] |= 0x40; txidpriv.bytes[0] &= 0xf8, txidpriv.bytes[31] &= 0x7f, txidpriv.bytes[31] |= 0x40;
txidpub = curve25519(txidpriv,curve25519_basepoint9()); txidpub = curve25519(txidpriv,curve25519_basepoint9());
@@ -42,8 +56,10 @@ uint256 DiceHashEntropy(uint256 &entropy,uint256 txidpriv) // assumes little end
ssecret2 = curve25519_shared(mypub,txidpriv); ssecret2 = curve25519_shared(mypub,txidpriv);
if ( memcmp(ssecret.bytes,ssecret2.bytes,32) == 0 ) if ( memcmp(ssecret.bytes,ssecret2.bytes,32) == 0 )
{ {
vcalc_sha256(0,(uint8_t *)&entropy,ssecret.bytes,32); vcalc_sha256(0,(uint8_t *)&_entropy,ssecret.bytes,32);
vcalc_sha256(0,(uint8_t *)&hentropy,(uint8_t *)&entropy,32); vcalc_sha256(0,(uint8_t *)&_hentropy,_entropy,32);
endiancpy(&entropy,_entropy,32);
endiancpy(&hentropy,_hentropy,32);
} else fprintf(stderr,"shared secrets dont match\n"); } else fprintf(stderr,"shared secrets dont match\n");
return(hentropy); return(hentropy);
} }