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| author | chriseth <c@ethdev.com> | 2017-01-25 00:38:06 +0800 |
|---|---|---|
| committer | chriseth <c@ethdev.com> | 2017-01-25 06:37:48 +0800 |
| commit | 1316bb75651ea365c5246277d2dfd3d366be9070 (patch) | |
| tree | 8c46bf1a45ca85bcd1da2d8ef8b2556e22cf5634 /libsolidity/ast/AST.cpp | |
| parent | ba9a04500217e301bec63cab4e0c0f1d9322646d (diff) | |
| download | dexon-solidity-1316bb75651ea365c5246277d2dfd3d366be9070.tar.gz dexon-solidity-1316bb75651ea365c5246277d2dfd3d366be9070.tar.zst dexon-solidity-1316bb75651ea365c5246277d2dfd3d366be9070.zip | |
Warn about invalid checksums of addresses.
Diffstat (limited to 'libsolidity/ast/AST.cpp')
| -rw-r--r-- | libsolidity/ast/AST.cpp | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/libsolidity/ast/AST.cpp b/libsolidity/ast/AST.cpp index 8a43c3f7..e2b50dd7 100644 --- a/libsolidity/ast/AST.cpp +++ b/libsolidity/ast/AST.cpp @@ -20,8 +20,6 @@ * Solidity abstract syntax tree. */ -#include <algorithm> -#include <functional> #include <libsolidity/interface/Utils.h> #include <libsolidity/ast/AST.h> #include <libsolidity/ast/ASTVisitor.h> @@ -30,6 +28,11 @@ #include <libdevcore/SHA3.h> +#include <boost/algorithm/string.hpp> + +#include <algorithm> +#include <functional> + using namespace std; using namespace dev; using namespace dev::solidity; @@ -522,3 +525,39 @@ IdentifierAnnotation& Identifier::annotation() const m_annotation = new IdentifierAnnotation(); return static_cast<IdentifierAnnotation&>(*m_annotation); } + +bool Literal::looksLikeAddress() const +{ + if (subDenomination() != SubDenomination::None) + return false; + + string lit = value(); + return lit.substr(0, 2) == "0x" && abs(int(lit.length()) - 42) <= 1; +} + +bool Literal::passesAddressChecksum() const +{ + string lit = value(); + solAssert(lit.substr(0, 2) == "0x", "Expected hex prefix"); + lit = lit.substr(2); + + if (lit.length() != 40) + return false; + + h256 hash = keccak256(boost::algorithm::to_lower_copy(lit, std::locale::classic())); + for (size_t i = 0; i < 40; ++i) + { + char addressCharacter = lit[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; +} |