mirrors/bitcoin-s
1
0
Fork 0
mirror of https://github.com/bitcoin-s/bitcoin-s.git synced 2025-03-15 20:30:17 +01:00
Code Issues Projects Releases Packages Wiki Activity
bitcoin-s/docs/next/crypto/crypto-intro.html
Docusaurus bot c454dc9160 Deploy website 
Deploy website version based on 43efce500d
2025-01-01 16:02:04 +00:00

130 lines
No EOL
26 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Crypto Module · bitcoin-s</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="The `crypto` module contains the base cryptographic functionality for Bitcoin-s. Specifically, this includes the fundamental cryptographic data structures and functions such as keys, hashing encryption and signing. This module does not include secondary cryptographic types and functions such as those pertaining to BIP 32 or 39, nor does it include signature code specific to Bitcoin transactions. For all of these things, see the [core module](/docs/next/core/core-intro). It is very important to keep this code well tested, and we also try to minimize the dependencies of this module."/><meta name="docsearch:version" content="next"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Crypto Module · bitcoin-s"/><meta property="og:type" content="website"/><meta property="og:url" content="https://bitcoin-s.org/"/><meta property="og:description" content="The `crypto` module contains the base cryptographic functionality for Bitcoin-s. Specifically, this includes the fundamental cryptographic data structures and functions such as keys, hashing encryption and signing. This module does not include secondary cryptographic types and functions such as those pertaining to BIP 32 or 39, nor does it include signature code specific to Bitcoin transactions. For all of these things, see the [core module](/docs/next/core/core-intro). It is very important to keep this code well tested, and we also try to minimize the dependencies of this module."/><meta property="og:image" content="https://bitcoin-s.org/img/undraw_online.svg"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://bitcoin-s.org/img/undraw_tweetstorm.svg"/><link rel="shortcut icon" href="/img/favicon.ico"/><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"/><script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-61958686-2', 'auto');
ga('send', 'pageview');
</script><link rel="stylesheet" href="/css/code-block-buttons.css"/><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js"></script><script type="text/javascript" src="https://fonts.googleapis.com/css?family=Montserrat:500"></script><script type="text/javascript" src="https://www.googletagmanager.com/gtag/js?id=UA-61958686-2"></script><script type="text/javascript" src="/js/code-block-buttons.js"></script><script src="/js/scrollSpy.js"></script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/"><img class="logo" src="/img/favicon.ico" alt="bitcoin-s"/><h2 class="headerTitleWithLogo">bitcoin-s</h2></a><a href="/versions"><h3>next</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/next/core/core-intro" target="_self">Docs</a></li><li class=""><a href="/download" target="_self">Download</a></li><li class=""><a href="/api/org/bitcoins" target="_self">API</a></li><li class=""><a href="/help" target="_self">Help</a></li><li class="navSearchWrapper reactNavSearchWrapper"><input type="text" id="search_input_react" placeholder="Search" title="Search"/></li></ul></nav></div></header></div></div><div class="navPusher"><div class="docMainWrapper wrapper"><div class="docsNavContainer" id="docsNav"><nav class="toc"><div class="toggleNav"><section class="navWrapper wrapper"><div class="navBreadcrumb wrapper"><div class="navToggle" id="navToggler"><div class="hamburger-menu"><div class="line1"></div><div class="line2"></div><div class="line3"></div></div></div><h2><i>›</i><span>Crypto Module</span></h2><div class="tocToggler" id="tocToggler"><i class="icon-toc"></i></div></div><div class="navGroups"><div class="navGroup"><h3 class="navGroupCategoryTitle">Getting Started</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/getting-started">Intro and Getting Started</a></li><li class="navListItem"><a class="navItem" href="/docs/next/bips">Supported BIPs</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Getting Setup</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/getting-setup">Getting Bitcoin-S installed on your machine</a></li><li class="navListItem"><a class="navItem" href="/docs/next/ui-setup">Installing the DLC Wallet UI</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Applications</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/applications/cli">CLI</a></li><li class="navListItem"><a class="navItem" href="/docs/next/applications/server">Application Server</a></li><li class="navListItem"><a class="navItem" href="/docs/next/applications/gui">GUI</a></li><li class="navListItem"><a class="navItem" href="/docs/next/applications/server-systemd">Systemd installation</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Chain</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/chain/chain">Blockchain Verification</a></li><li class="navListItem"><a class="navItem" href="/docs/next/chain/filter-sync">Syncing Blockfilters</a></li><li class="navListItem"><a class="navItem" href="/docs/next/chain/chain-query-api">Chain Query API</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Configuration</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/config/configuration">Application Configuration</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Core Module</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/core/core-intro">Core Module</a></li><li class="navListItem"><a class="navItem" href="/docs/next/core/addresses">Generating Addresses</a></li><li class="navListItem"><a class="navItem" href="/docs/next/core/hd-keys">HD Key Generation</a></li><li class="navListItem"><a class="navItem" href="/docs/next/core/adding-spks">Adding New Script Types</a></li><li class="navListItem"><a class="navItem" href="/docs/next/core/spending-info">Signing Transactions</a></li><li class="navListItem"><a class="navItem" href="/docs/next/core/psbts">Partially Signed Bitcoin Transactions</a></li><li class="navListItem"><a class="navItem" href="/docs/next/core/dlc">Discreet Log Contract Data Structures</a></li><li class="navListItem"><a class="navItem" href="/docs/next/core/txbuilder">TxBuilder Example</a></li><li class="navListItem"><a class="navItem" href="/docs/next/core/lightning-network">Lightning Network Data Types</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Crypto Module</h3><ul class=""><li class="navListItem navListItemActive"><a class="navItem" href="/docs/next/crypto/crypto-intro">Crypto Module</a></li><li class="navListItem"><a class="navItem" href="/docs/next/crypto/sign">Sign API</a></li><li class="navListItem"><a class="navItem" href="/docs/next/crypto/adaptor-signatures">Adaptor Signatures</a></li><li class="navListItem"><a class="navItem" href="/docs/next/crypto/musig">MuSig</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Fee Provider</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/fee-provider/fee-provider">Fee Provider</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Key Manager</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/key-manager/server-key-manager">Server Key Manager</a></li><li class="navListItem"><a class="navItem" href="/docs/next/key-manager/key-manager">Key Manager</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Node</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/node/node">Light Client</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Wallet</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet">Wallet</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet-callbacks">Wallet Callbacks</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet-get-address">Wallet Get Address APIs</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/address-tagging">Address and UTXO tagging</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/dlc">Executing A DLC with Bitcoin-S</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet-rescan">wallet/wallet-rescan</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet-sync">Wallet Sync</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet-rpc">Wallet RPC Examples</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/backups">Wallet Backups</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet-election-example">Wallet Election Example</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet-price-example">Wallet Price Example</a></li><li class="navListItem"><a class="navItem" href="/docs/next/wallet/wallet-sports-betting-example">Wallet Sports Betting Example</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Tor</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/tor/tor">Tor Setup</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">RPC Clients</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/rpc/rpc-clients-intro">Introduction</a></li><li class="navListItem"><a class="navItem" href="/docs/next/rpc/rpc-eclair">Eclair</a></li><li class="navListItem"><a class="navItem" href="/docs/next/rpc/rpc-bitcoind">bitcoind/Bitcoin Core</a></li><li class="navListItem"><a class="navItem" href="/docs/next/rpc/lnd-rpc">LND</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Secp256k1</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/secp256k1/secp256k1">Secp256k1</a></li><li class="navListItem"><a class="navItem" href="/docs/next/secp256k1/jni-modify">Adding to Secp256k1 JNI</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Testkit</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/testkit/testkit">Testkit</a></li><li class="navListItem"><a class="navItem" href="/docs/next/testkit/testkit-core">Testkit Core</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">DLC Oracle</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/oracle/build-oracle-server">Building the Oracle Server</a></li><li class="navListItem"><a class="navItem" href="/docs/next/oracle/oracle-server">Oracle Server</a></li><li class="navListItem"><a class="navItem" href="/docs/next/oracle/oracle-election-example">Election Example</a></li><li class="navListItem"><a class="navItem" href="/docs/next/oracle/oracle-price-example">Price Example</a></li><li class="navListItem"><a class="navItem" href="/docs/next/oracle/oracle-sports-betting-example">Sports Betting Example</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Contributing</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/contributing">Contributing</a></li><li class="navListItem"><a class="navItem" href="/docs/next/contributing-website">Contributing to the website</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Security</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/next/security">Security</a></li></ul></div></div></section></div><script>
var coll = document.getElementsByClassName('collapsible');
var checkActiveCategory = true;
for (var i = 0; i < coll.length; i++) {
var links = coll[i].nextElementSibling.getElementsByTagName('*');
if (checkActiveCategory){
for (var j = 0; j < links.length; j++) {
if (links[j].classList.contains('navListItemActive')){
coll[i].nextElementSibling.classList.toggle('hide');
coll[i].childNodes[1].classList.toggle('rotate');
checkActiveCategory = false;
break;
}
}
}
coll[i].addEventListener('click', function() {
var arrow = this.childNodes[1];
arrow.classList.toggle('rotate');
var content = this.nextElementSibling;
content.classList.toggle('hide');
});
}
document.addEventListener('DOMContentLoaded', function() {
createToggler('#navToggler', '#docsNav', 'docsSliderActive');
createToggler('#tocToggler', 'body', 'tocActive');
var headings = document.querySelector('.toc-headings');
headings && headings.addEventListener('click', function(event) {
var el = event.target;
while(el !== headings){
if (el.tagName === 'A') {
document.body.classList.remove('tocActive');
break;
} else{
el = el.parentNode;
}
}
}, false);
function createToggler(togglerSelector, targetSelector, className) {
var toggler = document.querySelector(togglerSelector);
var target = document.querySelector(targetSelector);
if (!toggler) {
return;
}
toggler.onclick = function(event) {
event.preventDefault();
target.classList.toggle(className);
};
}
});
</script></nav></div><div class="container mainContainer docsContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/bitcoin-s/bitcoin-s/blob/master/docs/crypto/crypto-intro.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 id="__docusaurus" class="postHeaderTitle">Crypto Module</h1></header><article><div><span><p>The <code>crypto</code> module contains the base cryptographic functionality for Bitcoin-s. Specifically, this includes the fundamental cryptographic data structures and functions such as keys, hashing encryption and signing. This module does not include secondary cryptographic types and functions such as those pertaining to BIP 32 or 39, nor does it include signature code specific to Bitcoin transactions. For all of these things, see the <a href="/docs/next/core/core-intro">core module</a>. It is very important to keep this code well tested, and we also try to minimize the dependencies of this module.</p>
<h2><a class="anchor" aria-hidden="true" id="dealing-with-arraybyte"></a><a href="#dealing-with-arraybyte" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Dealing with Array[Byte]</h2>
<p>The crypto module contains a trait called <code>NetworkElement</code> which is extended by all data structures with byte serializations. This allows for a uniform interface when dealing with serialization and deserialization which can be very important when constructing hashes. Additionally, the <code>Factory</code> trait can be extended by companion objects of <code>NetworkElement</code>s to allow for out-of-the-box constructors from String hex or bytes in little or big endian given one constructor. The <code>CryptoUtil</code> object provides easy access to hash functions and <code>HashDigest</code> wraps the results in nice types. Lastly, this module also contains a <code>BytesUtil</code> for dealing with raw bytes and raw hex.</p>
<h2><a class="anchor" aria-hidden="true" id="aes-encryption"></a><a href="#aes-encryption" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>AES Encryption</h2>
<p>The crypto module contains support for AES using the object <code>AesCrypt</code> and its companion data structures.</p>
<h2><a class="anchor" aria-hidden="true" id="elliptic-curve-keys-and-functions"></a><a href="#elliptic-curve-keys-and-functions" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Elliptic Curve Keys and Functions</h2>
<p><code>ECKey.scala</code> contains types <code>ECPublicKey</code> and <code>ECPrivateKey</code> which represent private and public keys for the secp256k1 curve (used by Bitcoin).
There also exists <code>SchnorrPublicKey</code> and <code>SchnorrNonce</code> that can be used for doing BIP 340 compatible Schnorr signatures.</p>
<p>These keys also implement functions for using them to create and verify <code>ECDigitalSignature</code>s, <code>SchnorrDigitalSignatures</code>, and <code>ECPrivateKey</code> implements the <a href="/docs/next/crypto/sign"><code>Sign</code> interface</a>. Note that all sensitive information (such as private keys) extends the <code>MaskToString</code> interface which overrides the <code>toString</code> method to mask the actual result unless <code>toStringSensitive</code> is explicitly called.
This is done to avoid accidentally logging keys.</p>
<p>Utility functions for signatures (such as checking for or flipping to low s) can be found in <code>DERSignatureUtil</code>.</p>
<p>Lastly, Bitcoin-S uses Java Native Interface (JNI) bindings to the Bitcoin library secp256k1 to execute cryptographic functions by default. See <a href="/docs/next/secp256k1/secp256k1">this doc</a> for more details. However, fall-back implementations of all cryptographic functions supported and used exist using the bouncy castle library in <code>BouncyCastleUtil</code>.</p>
<h2><a class="anchor" aria-hidden="true" id="basic-examples"></a><a href="#basic-examples" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Basic Examples</h2>
<h3><a class="anchor" aria-hidden="true" id="ecdsa-example"></a><a href="#ecdsa-example" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>ECDSA Example</h3>
<pre><code class="hljs css language-scala"><span class="hljs-comment">// Randomly generate new key</span>
<span class="hljs-keyword">val</span> privateKey = <span class="hljs-type">ECPrivateKey</span>.freshPrivateKey
<span class="hljs-comment">// Construct private key from hex</span>
<span class="hljs-keyword">val</span> privateKeyFixed = <span class="hljs-type">ECPrivateKey</span>(<span class="hljs-string">"6846a082d76e7c34cd2deddc6ef3d4cb3220e6c72c7c9ec03408d60ed976837c"</span>)
<span class="hljs-comment">// Compute public key from private key</span>
<span class="hljs-keyword">val</span> publicKey = privateKey.publicKey
<span class="hljs-comment">// Take SHA256 hash</span>
<span class="hljs-keyword">val</span> hash = <span class="hljs-type">CryptoUtil</span>.sha256(<span class="hljs-type">ByteVector</span>(<span class="hljs-string">"Hello"</span>.getBytes()))
<span class="hljs-comment">// Sign and verify signature</span>
<span class="hljs-keyword">val</span> sig = privateKey.sign(hash)
<span class="hljs-keyword">val</span> validSig = publicKey.verify(hash, sig)
</code></pre>
<h3><a class="anchor" aria-hidden="true" id="schnorr-example"></a><a href="#schnorr-example" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Schnorr Example</h3>
<pre><code class="hljs css language-scala"><span class="hljs-comment">// Randomly generate new key</span>
<span class="hljs-keyword">val</span> privateKey = <span class="hljs-type">ECPrivateKey</span>.freshPrivateKey
<span class="hljs-comment">// Construct private key from hex</span>
<span class="hljs-keyword">val</span> privateKeyFixed = <span class="hljs-type">ECPrivateKey</span>(<span class="hljs-string">"6846a082d76e7c34cd2deddc6ef3d4cb3220e6c72c7c9ec03408d60ed976837c"</span>)
<span class="hljs-comment">// Compute schnorr public key from private key</span>
<span class="hljs-keyword">val</span> publicKey = privateKey.schnorrPublicKey
<span class="hljs-comment">// Take SHA256 hash</span>
<span class="hljs-keyword">val</span> hash = <span class="hljs-type">CryptoUtil</span>.sha256(<span class="hljs-type">ByteVector</span>(<span class="hljs-string">"Hello"</span>.getBytes()))
<span class="hljs-comment">// Sign and verify signature</span>
<span class="hljs-keyword">val</span> sig = privateKey.schnorrSign(hash.bytes)
<span class="hljs-keyword">val</span> validSig = publicKey.verify(hash.bytes, sig)
</code></pre>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/next/core/lightning-network"><span class="arrow-prev">← </span><span>Lightning Network Data Types</span></a><a class="docs-next button" href="/docs/next/crypto/sign"><span>Sign API</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#dealing-with-arraybyte">Dealing with Array[Byte]</a></li><li><a href="#aes-encryption">AES Encryption</a></li><li><a href="#elliptic-curve-keys-and-functions">Elliptic Curve Keys and Functions</a></li><li><a href="#basic-examples">Basic Examples</a><ul class="toc-headings"><li><a href="#ecdsa-example">ECDSA Example</a></li><li><a href="#schnorr-example">Schnorr Example</a></li></ul></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/favicon.ico" alt="bitcoin-s" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/en/getting-started">Getting Started</a><a href="/docs/en/core/core-intro">Guides</a><a href="/api/org/bitcoins">API Reference</a></div><div><h5>Community</h5><a href="/en/users.html">User Showcase</a><a href="https://join.slack.com/t/suredbits/shared_invite/zt-eavycu0x-WQL7XOakzQo8tAy7jHHZUw" target="_blank" rel="noreferrer noopener">Slack</a><a href="https://gitter.im/bitcoin-s-core/">Gitter chat</a></div><div><h5>More</h5><a href="https://github.com/bitcoin-s/bitcoin-s">GitHub</a><a class="github-button" href="https://github.com/bitcoin-s/bitcoin-s" data-icon="octicon-star" data-count-href="/bitcoin-s/bitcoin-s-core/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><section class="copyright">Copyright © 2025 Suredbits &amp; the bitcoin-s developers</section></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
document.addEventListener('keyup', function(e) {
if (e.target !== document.body) {
return;
}
// keyCode for '/' (slash)
if (e.keyCode === 191) {
const search = document.getElementById('search_input_react');
search && search.focus();
}
});
</script><script>
var search = docsearch({
apiKey: '0a510688bf8448e19aeb380377d328d3',
indexName: 'bitcoin-s',
inputSelector: '#search_input_react'
});
</script></body></html>
Reference in a new issue View git blame Copy permalink