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add support for validating ethereum address, Fixed #34
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#include <graphene/utilities/CommonData.h> | ||
#include <boost/algorithm/string.hpp> | ||
#include <graphene/utilities/SHA3.h> | ||
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using namespace std; | ||
using namespace graphene::utilities; | ||
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int graphene::utilities::fromHex(char _i, WhenError _throw) | ||
{ | ||
if (_i >= '0' && _i <= '9') | ||
return _i - '0'; | ||
if (_i >= 'a' && _i <= 'f') | ||
return _i - 'a' + 10; | ||
if (_i >= 'A' && _i <= 'F') | ||
return _i - 'A' + 10; | ||
if (_throw == WhenError::Throw) | ||
return -1;// BOOST_THROW_EXCEPTION(BadHexCharacter() << errinfo_invalidSymbol(_i)); | ||
else | ||
return -1; | ||
} | ||
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bytes graphene::utilities::fromHex(std::string const& _s, WhenError _throw) | ||
{ | ||
unsigned s = (_s.size() >= 2 && _s[0] == '0' && _s[1] == 'x') ? 2 : 0; | ||
std::vector<uint8_t> ret; | ||
ret.reserve((_s.size() - s + 1) / 2); | ||
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if (_s.size() % 2) | ||
{ | ||
int h = fromHex(_s[s++], WhenError::DontThrow); | ||
if (h != -1) | ||
ret.push_back(h); | ||
else if (_throw == WhenError::Throw) | ||
return bytes();//BOOST_THROW_EXCEPTION(BadHexCharacter()); | ||
else | ||
return bytes(); | ||
} | ||
for (unsigned i = s; i < _s.size(); i += 2) | ||
{ | ||
int h = fromHex(_s[i], WhenError::DontThrow); | ||
int l = fromHex(_s[i + 1], WhenError::DontThrow); | ||
if (h != -1 && l != -1) | ||
ret.push_back((byte)(h * 16 + l)); | ||
else if (_throw == WhenError::Throw) | ||
return bytes();//BOOST_THROW_EXCEPTION(BadHexCharacter()); | ||
else | ||
return bytes(); | ||
} | ||
return ret; | ||
} | ||
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bool graphene::utilities::passesAddressChecksum(string const& _str, bool _strict) | ||
{ | ||
if (_str.substr(0, 2) != "0x") | ||
return false; | ||
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// string s = _str.substr(0, 2) == "0x" ? _str.substr(2) : _str; | ||
string s = _str.substr(2); | ||
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if (s.length() != 40) | ||
return false; | ||
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/* | ||
if (!_strict && ( | ||
_str.find_first_of("abcdef") == string::npos || | ||
_str.find_first_of("ABCDEF") == string::npos | ||
)) | ||
return true; | ||
*/ | ||
if (!_strict) | ||
{ | ||
if (s.find_first_of("abcdef") == string::npos && s.find_first_not_of("0123456789ABCDEF") == string::npos) | ||
{ | ||
return true; | ||
} else if (s.find_first_of("ABCDEF") == string::npos && s.find_first_not_of("0123456789abcdef") == string::npos) | ||
{ | ||
return true; | ||
} else | ||
{ | ||
return false; | ||
} | ||
} | ||
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h256 hash = keccak256(boost::algorithm::to_lower_copy(s, std::locale::classic())); | ||
for (size_t i = 0; i < 40; ++i) | ||
{ | ||
char addressCharacter = s[i]; | ||
bool lowerCase; | ||
if ('a' <= addressCharacter && addressCharacter <= 'f') | ||
lowerCase = true; | ||
else if ('A' <= addressCharacter && addressCharacter <= 'F') | ||
lowerCase = false; | ||
else | ||
continue; | ||
unsigned nibble = (unsigned(hash[i / 2]) >> (4 * (1 - (i % 2)))) & 0xf; | ||
if ((nibble >= 8) == lowerCase) | ||
return false; | ||
} | ||
return true; | ||
} |
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/* | ||
This file is part of solidity. | ||
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solidity is free software: you can redistribute it and/or modify | ||
it under the terms of the GNU General Public License as published by | ||
the Free Software Foundation, either version 3 of the License, or | ||
(at your option) any later version. | ||
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solidity is distributed in the hope that it will be useful, | ||
but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
GNU General Public License for more details. | ||
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You should have received a copy of the GNU General Public License | ||
along with solidity. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
/** @file SHA3.cpp | ||
* @author Gav Wood <i@gavwood.com> | ||
* @date 2014 | ||
*/ | ||
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#include <graphene/utilities/SHA3.h> | ||
#include <cstdint> | ||
#include <cstdio> | ||
#include <cstdlib> | ||
#include <cstring> | ||
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using namespace std; | ||
using namespace graphene::utilities; | ||
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namespace graphene { namespace utilities { | ||
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/** libkeccak-tiny | ||
* | ||
* A single-file implementation of SHA-3 and SHAKE. | ||
* | ||
* Implementor: David Leon Gil | ||
* License: CC0, attribution kindly requested. Blame taken too, | ||
* but not liability. | ||
*/ | ||
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#define decshake(bits) \ | ||
int shake##bits(uint8_t*, size_t, const uint8_t*, size_t); | ||
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#define decsha3(bits) \ | ||
int sha3_##bits(uint8_t*, size_t, const uint8_t*, size_t); | ||
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#define deckeccak(bits) \ | ||
int keccak##bits(uint8_t*, size_t, const uint8_t*, size_t); | ||
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decshake(128) | ||
decshake(256) | ||
decsha3(224) | ||
decsha3(256) | ||
decsha3(384) | ||
decsha3(512) | ||
deckeccak(224) | ||
deckeccak(256) | ||
deckeccak(384) | ||
deckeccak(512) | ||
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/******** The Keccak-f[1600] permutation ********/ | ||
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/*** Constants. ***/ | ||
static const uint8_t rho[24] = \ | ||
{ 1, 3, 6, 10, 15, 21, | ||
28, 36, 45, 55, 2, 14, | ||
27, 41, 56, 8, 25, 43, | ||
62, 18, 39, 61, 20, 44}; | ||
static const uint8_t pi[24] = \ | ||
{10, 7, 11, 17, 18, 3, | ||
5, 16, 8, 21, 24, 4, | ||
15, 23, 19, 13, 12, 2, | ||
20, 14, 22, 9, 6, 1}; | ||
static const uint64_t RC[24] = \ | ||
{1ULL, 0x8082ULL, 0x800000000000808aULL, 0x8000000080008000ULL, | ||
0x808bULL, 0x80000001ULL, 0x8000000080008081ULL, 0x8000000000008009ULL, | ||
0x8aULL, 0x88ULL, 0x80008009ULL, 0x8000000aULL, | ||
0x8000808bULL, 0x800000000000008bULL, 0x8000000000008089ULL, 0x8000000000008003ULL, | ||
0x8000000000008002ULL, 0x8000000000000080ULL, 0x800aULL, 0x800000008000000aULL, | ||
0x8000000080008081ULL, 0x8000000000008080ULL, 0x80000001ULL, 0x8000000080008008ULL}; | ||
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/*** Helper macros to unroll the permutation. ***/ | ||
#define rol(x, s) (((x) << s) | ((x) >> (64 - s))) | ||
#define REPEAT6(e) e e e e e e | ||
#define REPEAT24(e) REPEAT6(e e e e) | ||
#define REPEAT5(e) e e e e e | ||
#define FOR5(v, s, e) \ | ||
v = 0; \ | ||
REPEAT5(e; v += s;) | ||
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/*** Keccak-f[1600] ***/ | ||
static inline void keccakf(void* state) { | ||
uint64_t* a = (uint64_t*)state; | ||
uint64_t b[5] = {0}; | ||
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for (int i = 0; i < 24; i++) { | ||
uint8_t x, y; | ||
// Theta | ||
FOR5(x, 1, | ||
b[x] = 0; | ||
FOR5(y, 5, | ||
b[x] ^= a[x + y]; )) | ||
FOR5(x, 1, | ||
FOR5(y, 5, | ||
a[y + x] ^= b[(x + 4) % 5] ^ rol(b[(x + 1) % 5], 1); )) | ||
// Rho and pi | ||
uint64_t t = a[1]; | ||
x = 0; | ||
REPEAT24(b[0] = a[pi[x]]; | ||
a[pi[x]] = rol(t, rho[x]); | ||
t = b[0]; | ||
x++; ) | ||
// Chi | ||
FOR5(y, | ||
5, | ||
FOR5(x, 1, | ||
b[x] = a[y + x];) | ||
FOR5(x, 1, | ||
a[y + x] = b[x] ^ ((~b[(x + 1) % 5]) & b[(x + 2) % 5]); )) | ||
// Iota | ||
a[0] ^= RC[i]; | ||
} | ||
} | ||
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/******** The FIPS202-defined functions. ********/ | ||
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/*** Some helper macros. ***/ | ||
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#define _(S) do { S } while (0) | ||
#define FOR(i, ST, L, S) \ | ||
_(for (size_t i = 0; i < L; i += ST) { S; }) | ||
#define mkapply_ds(NAME, S) \ | ||
static inline void NAME(uint8_t* dst, \ | ||
const uint8_t* src, \ | ||
size_t len) { \ | ||
FOR(i, 1, len, S); \ | ||
} | ||
#define mkapply_sd(NAME, S) \ | ||
static inline void NAME(const uint8_t* src, \ | ||
uint8_t* dst, \ | ||
size_t len) { \ | ||
FOR(i, 1, len, S); \ | ||
} | ||
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mkapply_ds(xorin, dst[i] ^= src[i]) // xorin | ||
mkapply_sd(setout, dst[i] = src[i]) // setout | ||
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#define P keccakf | ||
#define Plen 200 | ||
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// Fold P*F over the full blocks of an input. | ||
#define foldP(I, L, F) \ | ||
while (L >= rate) { \ | ||
F(a, I, rate); \ | ||
P(a); \ | ||
I += rate; \ | ||
L -= rate; \ | ||
} | ||
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/** The sponge-based hash construction. **/ | ||
static inline int hash(uint8_t* out, size_t outlen, | ||
const uint8_t* in, size_t inlen, | ||
size_t rate, uint8_t delim) { | ||
if ((out == NULL) || ((in == NULL) && inlen != 0) || (rate >= Plen)) { | ||
return -1; | ||
} | ||
uint8_t a[Plen] = {0}; | ||
// Absorb input. | ||
foldP(in, inlen, xorin); | ||
// Xor in the DS and pad frame. | ||
a[inlen] ^= delim; | ||
a[rate - 1] ^= 0x80; | ||
// Xor in the last block. | ||
xorin(a, in, inlen); | ||
// Apply P | ||
P(a); | ||
// Squeeze output. | ||
foldP(out, outlen, setout); | ||
setout(a, out, outlen); | ||
memset(a, 0, 200); | ||
return 0; | ||
} | ||
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/*** Helper macros to define SHA3 and SHAKE instances. ***/ | ||
#define defshake(bits) \ | ||
int shake##bits(uint8_t* out, size_t outlen, \ | ||
const uint8_t* in, size_t inlen) { \ | ||
return hash(out, outlen, in, inlen, 200 - (bits / 4), 0x1f); \ | ||
} | ||
#define defsha3(bits) \ | ||
int sha3_##bits(uint8_t* out, size_t outlen, \ | ||
const uint8_t* in, size_t inlen) { \ | ||
if (outlen > (bits/8)) { \ | ||
return -1; \ | ||
} \ | ||
return hash(out, outlen, in, inlen, 200 - (bits / 4), 0x06); \ | ||
} | ||
#define defkeccak(bits) \ | ||
int keccak##bits(uint8_t* out, size_t outlen, \ | ||
const uint8_t* in, size_t inlen) { \ | ||
if (outlen > (bits/8)) { \ | ||
return -1; \ | ||
} \ | ||
return hash(out, outlen, in, inlen, 200 - (bits / 4), 0x01); \ | ||
} | ||
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/*** FIPS202 SHAKE VOFs ***/ | ||
defshake(128) | ||
defshake(256) | ||
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/*** FIPS202 SHA3 FOFs ***/ | ||
defsha3(224) | ||
defsha3(256) | ||
defsha3(384) | ||
defsha3(512) | ||
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/*** KECCAK FOFs ***/ | ||
defkeccak(224) | ||
defkeccak(256) | ||
defkeccak(384) | ||
defkeccak(512) | ||
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bool keccak256(bytesConstRef _input, bytesRef o_output) | ||
{ | ||
// FIXME: What with unaligned memory? | ||
if (o_output.size() != 32) | ||
return false; | ||
graphene::utilities::keccak256(o_output.data(), 32, _input.data(), _input.size()); | ||
// keccak::keccak(ret.data(), 32, (uint64_t const*)_input.data(), _input.size()); | ||
return true; | ||
} | ||
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} | ||
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} |
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