diff options
Diffstat (limited to 'libdevcore/CommonData.cpp')
| -rw-r--r-- | libdevcore/CommonData.cpp | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/libdevcore/CommonData.cpp b/libdevcore/CommonData.cpp index db11e61c..445d11cd 100644 --- a/libdevcore/CommonData.cpp +++ b/libdevcore/CommonData.cpp @@ -21,6 +21,7 @@ #include <libdevcore/CommonData.h> #include <libdevcore/Exceptions.h> +#include <libdevcore/Assertions.h> #include <libdevcore/SHA3.h> #include <boost/algorithm/string.hpp> @@ -86,20 +87,26 @@ bool dev::passesAddressChecksum(string const& _str, bool _strict) )) return true; + return _str == dev::getChecksummedAddress(_str); +} + +string dev::getChecksummedAddress(string const& _addr) +{ + string s = _addr.substr(0, 2) == "0x" ? _addr.substr(2) : _addr; + assertThrow(s.length() == 40, InvalidAddress, ""); + assertThrow(s.find_first_not_of("0123456789abcdefABCDEF") == string::npos, InvalidAddress, ""); + h256 hash = keccak256(boost::algorithm::to_lower_copy(s, std::locale::classic())); + + string ret = "0x"; 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; + if (nibble >= 8) + ret += toupper(addressCharacter); + else + ret += tolower(addressCharacter); } - return true; + return ret; } |