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2014-09-01Fixing Compiler Error C2466ENikS
2014-07-09add GetRandBytes() as wrapper for RAND_bytes()Philip Kaufmann
- add a small wrapper in util around RAND_bytes() and replace with GetRandBytes() in the code to log errors from calling RAND_bytes() - remove OpenSSL header rand.h where no longer needed
2014-07-01libsecp256k1 integrationPieter Wuille
2014-06-26ensure clean and consistent "namespace" usagePhilip Kaufmann
- remove some missplaced ; - ensure end of a namespace is clearly visible - use same formatting when using namespace
2014-06-21Move crypto implementations to src/crypto/Pieter Wuille
2014-06-21Add a built-in SHA256/SHA512 implementation.Pieter Wuille
This also moves the HMAC-SHA512 implementation to sha2.cpp.
2014-06-03key.cpp: fail with a friendlier message on missing ssl EC supportAndrew Poelstra
Previously if bitcoind is linked with an OpenSSL which is compiled without EC support, this is seen as an assertion failure "pKey != NULL" at key.cpp:134, which occurs after several seconds. It is an esoteric piece of knowledge to interpret this as "oops, I linked with the wrong OpenSSL", and because of the delay it may not even be noticed. The new output is : OpenSSL appears to lack support for elliptic curve cryptography. For more information, visit https://en.bitcoin.it/wiki/OpenSSL_and_EC_Libraries : Initialization sanity check failed. Bitcoin Core is shutting down. which occurs immediately after attempted startup. This also blocks in an InitSanityCheck() function which currently only checks for EC support but should eventually do more. See #4081.
2014-05-20remove CPubKey::VerifyCompact( ) which is never usedKamil Domanski
2014-03-10Also switch the (unused) verification code to low-s instead of even-s.Pieter Wuille
a81cd968 introduced a malleability breaker for signatures (using an even value for S). In e0e14e43 this was changed to the lower of two potential values, rather than the even one. Only the signing code was changed though, the (for now unused) verification code wasn't adapted.
2013-12-02Sanitize assert usage and refuse to compile with NDEBUG.Gregory Maxwell
There were quite a few places where assert() was used with side effects, making operation with NDEBUG non-functional. This commit fixes all the cases I know about, but also adds an #error on NDEBUG because the code is untested without assertions and may still have vulnerabilities if used without assert.
2013-11-10Cleanup code using forward declarations.Brandon Dahler
Use misc methods of avoiding unnecesary header includes. Replace int typedefs with int##_t from stdint.h. Replace PRI64[xdu] with PRI[xdu]64 from inttypes.h. Normalize QT_VERSION ifs where possible. Resolve some indirect dependencies as direct ones. Remove extern declarations from .cpp files.
2013-10-20Merge pull request #3119Pieter Wuille
db0e8cc Bump Year Number to 2013 (super3)
2013-10-20Bump Year Number to 2013super3
2013-10-16Merge pull request #2950 from pstratem/walletloadGavin Andresen
Walletload
2013-09-20Use 'low S' as malleability breaker rather than 'even S'Pieter Wuille
2013-08-29verify vchPubKey matches calculated public key unless fSkipCheck is setpatrick s
2013-08-28improve wallet load time by removing duplicated calls to EC_KEY_check_key ↵patrick s
and adding a hash for vchPubKey/vchPrivKey entries in wallet.dat backwards compatible with previous wallet.dat format
2013-08-15Merge pull request #2131 from sipa/evensGregory Maxwell
Only create signatures with even S, and verification mode to check.
2013-08-15Merge pull request #2829 from sipa/bip32Gavin Andresen
BIP 32 derivation + test vectors
2013-08-16Only create signatures with even S, and verification mode to check.Pieter Wuille
To fix a minor malleability found by Sergio Lerner (reported here: https://bitcointalk.org/index.php?topic=8392.msg1245898#msg1245898) The problem is that if (R,S) is a valid ECDSA signature for a given message and public key, (R,-S) is also valid. Modulo N (the order of the secp256k1 curve), this means that both (R,S) and (R,N-S) are valid. Given that N is odd, S and N-S have a different lowest bit. We solve the problem by forcing signatures to have an even S value, excluding one of the alternatives. This commit just changes the signing code to always produce even S values, and adds a verification mode to check it. This code is not enabled anywhere yet. Existing tests in key_tests.cpp verify that the produced signatures are still valid.
2013-07-15BIP32 derivation implementationPieter Wuille
2013-07-13Fix minor backward incompatibilityPieter Wuille
The key refactor changed the way unencrypted private keys with compressed public key are stored in the wallet. Apparently older versions relied on this to verify the correctness of stored keys. Note that earlier pre-release versions do risk creating wallets that can not be opened by 0.8.3 and earlier.
2013-05-30CSecret/CKey -> CKey/CPubKey split/refactorPieter Wuille
2013-05-30Make CPubKey statically allocatedPieter Wuille
2013-05-19Fix memory leak on exception in Key::SignCompactDaniel Larimer
2013-05-19fix memory leak in CKey::SetCompactSignature()Daniel Larimer
2012-10-20Compact serialization for scriptsPieter Wuille
Special serializers for script which detect common cases and encode them much more efficiently. 3 special cases are defined: * Pay to pubkey hash (encoded as 21 bytes) * Pay to script hash (encoded as 21 bytes) * Pay to pubkey starting with 0x02, 0x03 or 0x04 (encoded as 33 bytes) Other scripts up to 121 bytes require 1 byte + script length. Above that, scripts up to 16505 bytes require 2 bytes + script length.
2012-10-08Handle corrupt wallets gracefully.Gavin Andresen
Corrupt wallets used to cause a DB_RUNRECOVERY uncaught exception and a crash. This commit does three things: 1) Runs a BDB verify early in the startup process, and if there is a low-level problem with the database: + Moves the bad wallet.dat to wallet.timestamp.bak + Runs a 'salvage' operation to get key/value pairs, and writes them to a new wallet.dat + Continues with startup. 2) Much more tolerant of serialization errors. All errors in deserialization are reported by tolerated EXCEPT for errors related to reading keypairs or master key records-- those are reported and then shut down, so the user can get help (or recover from a backup). 3) Adds a new -salvagewallet option, which: + Moves the wallet.dat to wallet.timestamp.bak + extracts ONLY keypairs and master keys into a new wallet.dat + soft-sets -rescan, to recreate transaction history This was tested by randomly corrupting testnet wallets using a little python script I wrote (https://gist.github.com/3812689)
2012-08-01Bugfix: Fix a variety of misspellingsLuke Dashjr
2012-06-21fix a memory leak in key.cppPhilip Kaufmann
- add EC_KEY_free() in CKey::Reset() when pkey != NULL - init pkey with NULL in CKey constructor
2012-05-24Encapsulate public keys in CPubKeyPieter Wuille
2012-05-22Move signature cache from CKey::Verify to CheckSig in script.cppGavin Andresen
More than doubles the speed of verifying already-cached signatures that use compressed pubkeys: Before: ~200 microseconds After: ~80 microseconds (no caching at all: ~3,300 microseconds per signature) Also encapsulates the signature cache code in a class and fixes a signed/unsigned comparison warning.
2012-05-22Merge branch 'optimize'Gavin Andresen
2012-05-18Cache signature verificationsGavin Andresen
Create a maximum-10MB signature verification result cache. This should almost double the number of transactions that can be processed on a given CPU, because before this change ECDSA signatures were verified when transactions were added to the memory pool and then again when they appeared in a block.
2012-05-18Update License in File HeadersFordy
I originally created a pull to replace the "COPYING" in crypter.cpp and crypter.h, but it turned out that COPYING was actually the correct file.
2012-05-17Refactor: move code from key.h to key.cppGavin Andresen
2012-02-07Update all copyrights to 2012Gavin Andresen
2011-12-17Add GetSecret() and GetKeys() to CKeyStorePieter Wuille