hash.hh File Reference

#include <openssl/evp.h>
#include "lix/libutil/archive.hh"
#include "lix/libutil/types.hh"
#include "lix/libutil/serialise.hh"
#include "lix/libutil/file-system.hh"

Go to the source code of this file.

Classes
struct	nix::Hash
struct	nix::AbstractHashSink
class	nix::HashSink

Typedefs
using	nix::detail::EvpMdCtxPtr = std::unique_ptr<EVP_MD_CTX, decltype(&EVP_MD_CTX_free)>
typedef std::pair< Hash, uint64_t >	nix::HashResult

Enumerations
enum class	HashType : char { MD5 = 42 , SHA1 , SHA256 , SHA512 }
enum class	Base : int { Base64 , Base32 , Base16 , SRI }

Functions
	nix::MakeError (BadHash, Error)
Hash	nix::newHashAllowEmpty (std::string_view hashStr, std::optional< HashType > ht)
std::string	nix::printHash16or32 (const Hash &hash)
Hash	nix::hashString (HashType ht, std::string_view s)
Hash	nix::hashFile (HashType ht, const Path &path)
HashResult	nix::hashPath (HashType ht, const PreparedDump &path)
HashResult	nix::hashPath (HashType ht, Path path)
Hash	nix::compressHash (const Hash &hash, unsigned int newSize)
HashType	nix::parseHashType (std::string_view s)
std::optional< HashType >	nix::parseHashTypeOpt (std::string_view s)
std::string_view	nix::printHashType (HashType ht)
HashResult	nix::hashSource (HashType ht, Source &source)

Variables
const int	nix::md5HashSize = 16
const int	nix::sha1HashSize = 20
const int	nix::sha256HashSize = 32
const int	nix::sha512HashSize = 64

Typedef Documentation

HashResult

typedef std::pair<Hash, uint64_t> nix::HashResult

Compute the hash of the given path. The hash is defined as (essentially) hashString(ht, dumpPath(path)).

Function Documentation

compressHash()

Hash nix::compressHash	(	const Hash &	hash,
		unsigned int	newSize )

Compress a hash to the specified number of bytes by cyclically XORing bytes together.

hashFile()

Hash nix::hashFile	(	HashType	ht,
		const Path &	path )

Compute the hash of the given file.

hashString()

Hash nix::hashString	(	HashType	ht,
		std::string_view	s )

Compute the hash of the given string.

newHashAllowEmpty()

Hash nix::newHashAllowEmpty	(	std::string_view	hashStr,
		std::optional< HashType >	ht )

Helper that defaults empty hashes to the 0 hash.

parseHashType()

HashType nix::parseHashType

(

std::string_view

s

)

Parse a string representing a hash type.

parseHashTypeOpt()

std::optional< HashType > nix::parseHashTypeOpt

(

std::string_view

s

)

Will return nothing on parse error

printHash16or32()

std::string nix::printHash16or32

(

const Hash &

hash

)

Print a hash in base-16 if it's MD5, or base-32 otherwise.

printHashType()

std::string_view nix::printHashType

(

HashType

ht

)

And the reverse.