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boost: moveonly: create eccryptoverify.h|cpp and move helper functions there

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Eventually (after 0.10) these files will hold the logic for crypto
verification routines, and CKey/CPubKey will call into them.
This commit is contained in:
Cory Fields
2014-10-21 16:05:51 -04:00
parent 8d2396c9c4
commit 900078aeb4
5 changed files with 88 additions and 52 deletions
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53
src/key.cpp
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@@ -5,6 +5,7 @@
#include "key.h"
#include "crypto/sha2.h"
#include "eccryptoverify.h"
#include "random.h"
#ifdef USE_SECP256K1
@@ -30,60 +31,10 @@ public:
static CSecp256k1Init instance_of_csecp256k1;
#endif
int CompareBigEndian(const unsigned char *c1, size_t c1len, const unsigned char *c2, size_t c2len) {
while (c1len > c2len) {
if (*c1)
return 1;
c1++;
c1len--;
}
while (c2len > c1len) {
if (*c2)
return -1;
c2++;
c2len--;
}
while (c1len > 0) {
if (*c1 > *c2)
return 1;
if (*c2 > *c1)
return -1;
c1++;
c2++;
c1len--;
}
return 0;
}
/** Order of secp256k1's generator minus 1. */
const unsigned char vchMaxModOrder[32] = {
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,
0xBA,0xAE,0xDC,0xE6,0xAF,0x48,0xA0,0x3B,
0xBF,0xD2,0x5E,0x8C,0xD0,0x36,0x41,0x40
};
/** Half of the order of secp256k1's generator minus 1. */
const unsigned char vchMaxModHalfOrder[32] = {
0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0x5D,0x57,0x6E,0x73,0x57,0xA4,0x50,0x1D,
0xDF,0xE9,0x2F,0x46,0x68,0x1B,0x20,0xA0
};
const unsigned char vchZero[1] = {0};
} // anon namespace
bool CKey::Check(const unsigned char *vch) {
return CompareBigEndian(vch, 32, vchZero, 0) > 0 &&
CompareBigEndian(vch, 32, vchMaxModOrder, 32) <= 0;
}
bool CKey::CheckSignatureElement(const unsigned char *vch, int len, bool half) {
return CompareBigEndian(vch, len, vchZero, 0) > 0 &&
CompareBigEndian(vch, len, half ? vchMaxModHalfOrder : vchMaxModOrder, 32) <= 0;
return eccrypto::Check(vch);
}
void CKey::MakeNewKey(bool fCompressedIn) {