156 lines
3.2 KiB
Markdown
156 lines
3.2 KiB
Markdown
---
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id: crypto-reference
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title: Crypto
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---
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## Crypto.blake2b(data: bytes): bytes
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Runs the [blake2b hash algorithm](https://en.wikipedia.org/wiki/BLAKE_(hash_function)#BLAKE2)
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over the given `bytes` data and returns a `bytes` representing the hash.
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<!--DOCUSAURUS_CODE_TABS-->
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<!--PascaLIGO-->
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```pascaligo
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function hasherman_blake (const s: bytes) : bytes is blake2b(s)
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```
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<!--CameLIGO-->
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```cameligo
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let hasherman_blake (s: bytes) : bytes = Crypto.blake2b s
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```
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<!--ReasonLIGO-->
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```reasonligo
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let hasherman_blake = (s: bytes) => Crypto.blake2b(s);
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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## Crypto.sha256(data: bytes) : bytes
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Runs the [sha256 hash algorithm](https://en.wikipedia.org/wiki/SHA-2) over the given
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`bytes` data and returns a `bytes` representing the hash.
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<!--DOCUSAURUS_CODE_TABS-->
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<!--PascaLIGO-->
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```pascaligo
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function hasherman (const s : bytes) : bytes is
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begin skip end with sha_256(s)
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```
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<!--CameLIGO-->
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```cameligo
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let hasherman (s : bytes) : bytes =
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Crypto.sha256 s
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```
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<!--ReasonLIGO-->
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```reasonligo
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let hasherman = (s: bytes): bytes => Crypto.sha256(s);
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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## Crypto.sha512(data: bytes) : bytes
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Runs the [sha512 hash algorithm](https://en.wikipedia.org/wiki/SHA-2) over the given
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`bytes` data and returns a `bytes` representing the hash.
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<!--DOCUSAURUS_CODE_TABS-->
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<!--PascaLIGO-->
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```pascaligo
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function hasherman512 (const s: bytes) : bytes is sha_512(s)
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```
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<!--CameLIGO-->
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```cameligo
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let hasherman512 (s: bytes) : bytes = Crypto.sha512 s
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```
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<!--ReasonLIGO-->
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```reasonligo
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let hasherman512 = (s: bytes) => Crypto.sha512(s);
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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## Crypto.hash_key(k: key) : key_hash
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Hashes a key for easy comparison and storage.
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<!--DOCUSAURUS_CODE_TABS-->
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<!--PascaLIGO-->
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```pascaligo
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function check_hash_key (const kh1 : key_hash; const k2 : key) : bool * key_hash is block {
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var ret : bool := False ;
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var kh2 : key_hash := crypto_hash_key(k2) ;
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if kh1 = kh2 then ret := True else skip;
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} with (ret, kh2)
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```
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<!--CameLIGO-->
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```cameligo
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let check_hash_key (kh1, k2: key_hash * key) : bool * key_hash =
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let kh2 : key_hash = Crypto.hash_key k2 in
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if kh1 = kh2
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then (true, kh2)
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else (false, kh2)
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```
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<!--ReasonLIGO-->
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```reasonligo
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let check_hash_key = ((kh1, k2): (key_hash, key)) : (bool, key_hash) => {
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let kh2 : key_hash = Crypto.hash_key(k2);
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if (kh1 == kh2) {
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(true, kh2);
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}
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else {
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(false, kh2);
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}
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};
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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## Crypto.check(pk: key, signed: signature, data: bytes) : bool
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Check that a message has been signed by a particular key.
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> ⚠️ There is no way to *generate* a signed message in LIGO. This is because that would require storing a private key on chain, at which point it isn't very private anymore.
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<!--DOCUSAURUS_CODE_TABS-->
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<!--PascaLIGO-->
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```pascaligo
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function check_signature
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(const pk: key;
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const signed: signature;
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const msg: bytes) : bool
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is crypto_check(pk, signed, msg)
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```
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<!--CameLIGO-->
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```cameligo
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let check_signature (pk, signed, msg: key * signature * bytes) : bool =
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Crypto.check pk signed msg
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```
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<!--ReasonLIGO-->
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```reasonligo
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let check_signature = ((pk, signed, msg): (key, signature, bytes)) : bool => {
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Crypto.check(pk, signed, msg);
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};
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```
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<!--END_DOCUSAURUS_CODE_TABS-->
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