partial bitcoin#19953: Implement BIP 340-342 validation

contains:
- 9eb590894f15ff40806039bfd32972fbc260e30d
This commit is contained in:
Kittywhiskers Van Gogh 2024-10-20 09:21:30 +00:00
parent 477157d40b
commit fdc3c07554
No known key found for this signature in database
GPG Key ID: 30CD0C065E5C4AAD
2 changed files with 19 additions and 0 deletions

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@ -7,6 +7,7 @@
#include <crypto/common.h>
#include <crypto/hmac_sha512.h>
#include <string>
inline uint32_t ROTL32(uint32_t x, int8_t r)
{
@ -84,3 +85,12 @@ uint256 SHA256Uint256(const uint256& input)
CSHA256().Write(input.begin(), 32).Finalize(result.begin());
return result;
}
CHashWriter TaggedHash(const std::string& tag)
{
CHashWriter writer(SER_GETHASH, 0);
uint256 taghash;
CSHA256().Write((const unsigned char*)tag.data(), tag.size()).Finalize(taghash.begin());
writer << taghash << taghash;
return writer;
}

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@ -16,6 +16,7 @@
#include <uint256.h>
#include <version.h>
#include <string>
#include <vector>
typedef uint256 ChainCode;
@ -241,4 +242,12 @@ unsigned int MurmurHash3(unsigned int nHashSeed, Span<const unsigned char> vData
void BIP32Hash(const ChainCode &chainCode, unsigned int nChild, unsigned char header, const unsigned char data[32], unsigned char output[64]);
/** Return a CHashWriter primed for tagged hashes (as specified in BIP 340).
*
* The returned object will have SHA256(tag) written to it twice (= 64 bytes).
* A tagged hash can be computed by feeding the message into this object, and
* then calling CHashWriter::GetSHA256().
*/
CHashWriter TaggedHash(const std::string& tag);
#endif // BITCOIN_HASH_H