BranchesTags

Repository files navigation

Solidity WebAuthn Authentication Assertion Verifier

Webauthn-sol is a Solidity library for verifying WebAuthn authentication assertions. It builds on Daimo's WebAuthn.sol.

This library is optimized for Ethereum layer 2 rollup chains but will work on all EVM chains. Signature verification always attempts to use the RIP-7212 precompile and, if this fails, falls back to using FreshCryptoLib.

Important

FreshCryptoLib uses the ModExp precompile (address(0x05)), which is not supported on some chains, such as Polygon zkEVM. This library will not work on such chains, unless they support the RIP-7212 precompile.

Code excerpts

struct WebAuthnAuth {
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorassertionresponse-authenticatordatabytes authenticatorData;
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorresponse-clientdatajsonstring clientDataJSON;
/// The index at which "challenge":"..." occurs in clientDataJSONuint256 challengeIndex;
/// The index at which "type":"..." occurs in clientDataJSONuint256 typeIndex;
/// @dev The r value of secp256r1 signatureuint256 r;
/// @dev The s value of secp256r1 signatureuint256 s;
}
function verify(
bytesmemorychallenge,
boolrequireUserVerification,
WebAuthnAuth memorywebAuthnAuth,
uint256x,
uint256y
) internalviewreturns (bool)

example usage

bytes challenge =abi.encode(0xf631058a3ba1116acce12396fad0a125b5041c43f8e15723709f81aa8d5f4ccf);
uint256 x =28573233055232466711029625910063034642429572463461595413086259353299906450061;
uint256 y =39367742072897599771788408398752356480431855827262528811857788332151452825281;
WebAuthn.WebAuthnAuth memory auth = WebAuthn.WebAuthnAuth({
authenticatorData: hex"49960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000101",
clientDataJSON: string.concat(
'{"type":"webauthn.get","challenge":"', Base64Url.encode(challenge), '","origin":"http://localhost:3005"}'
),
challengeIndex: 23,
typeIndex: 1,
r: 43684192885701841787131392247364253107519555363555461570655060745499568693242,
s: 22655632649588629308599201066602670461698485748654492451178007896016452673579
});

Developing

After cloning the repo, run the tests using Forge, from Foundry

forge test

About

No description, website, or topics provided.

Resources

Readme
MIT license
Activity
Custom properties

Stars

290 stars

Watchers

21 watching

Forks

125 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Solidity WebAuthn Authentication Assertion Verifier
Webauthn-sol is a Solidity library for verifying WebAuthn authentication assertions. It builds on Daimo's WebAuthn.sol.
This library is optimized for Ethereum layer 2 rollup chains but will work on all EVM chains. Signature verification always attempts to use the RIP-7212 precompile and, if this fails, falls back to using FreshCryptoLib.
Important
FreshCryptoLib uses the ModExp precompile (address(0x05)), which is not supported on some chains, such as Polygon zkEVM. This library will not work on such chains, unless they support the RIP-7212 precompile.
Code excerpts
struct WebAuthnAuth {
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorassertionresponse-authenticatordatabytes authenticatorData;
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorresponse-clientdatajsonstring clientDataJSON;
/// The index at which "challenge":"..." occurs in clientDataJSONuint256 challengeIndex;
/// The index at which "type":"..." occurs in clientDataJSONuint256 typeIndex;
/// @dev The r value of secp256r1 signatureuint256 r;
/// @dev The s value of secp256r1 signatureuint256 s;
}
function verify(
bytesmemorychallenge,
boolrequireUserVerification,
WebAuthnAuth memorywebAuthnAuth,
uint256x,
uint256y
) internalviewreturns (bool) 
example usage
bytes challenge =abi.encode(0xf631058a3ba1116acce12396fad0a125b5041c43f8e15723709f81aa8d5f4ccf);
uint256 x =28573233055232466711029625910063034642429572463461595413086259353299906450061;
uint256 y =39367742072897599771788408398752356480431855827262528811857788332151452825281;
WebAuthn.WebAuthnAuth memory auth = WebAuthn.WebAuthnAuth({
authenticatorData: hex"49960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000101",
clientDataJSON: string.concat(
'{"type":"webauthn.get","challenge":"', Base64Url.encode(challenge), '","origin":"http://localhost:3005"}'
),
challengeIndex: 23,
typeIndex: 1,
r: 43684192885701841787131392247364253107519555363555461570655060745499568693242,
s: 22655632649588629308599201066602670461698485748654492451178007896016452673579
});
Developing
After cloning the repo, run the tests using Forge, from Foundry
forge test
About
No description, website, or topics provided.
Resources
Readme
MIT license
Activity
Custom properties
Stars
290 stars
Watchers
21 watching
Forks
125 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Solidity WebAuthn Authentication Assertion Verifier
Webauthn-sol is a Solidity library for verifying WebAuthn authentication assertions. It builds on Daimo's WebAuthn.sol.
This library is optimized for Ethereum layer 2 rollup chains but will work on all EVM chains. Signature verification always attempts to use the RIP-7212 precompile and, if this fails, falls back to using FreshCryptoLib.
Important
FreshCryptoLib uses the ModExp precompile (address(0x05)), which is not supported on some chains, such as Polygon zkEVM. This library will not work on such chains, unless they support the RIP-7212 precompile.
Code excerpts
struct WebAuthnAuth {
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorassertionresponse-authenticatordatabytes authenticatorData;
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorresponse-clientdatajsonstring clientDataJSON;
/// The index at which "challenge":"..." occurs in clientDataJSONuint256 challengeIndex;
/// The index at which "type":"..." occurs in clientDataJSONuint256 typeIndex;
/// @dev The r value of secp256r1 signatureuint256 r;
/// @dev The s value of secp256r1 signatureuint256 s;
}
function verify(
bytesmemorychallenge,
boolrequireUserVerification,
WebAuthnAuth memorywebAuthnAuth,
uint256x,
uint256y
) internalviewreturns (bool) 
example usage
bytes challenge =abi.encode(0xf631058a3ba1116acce12396fad0a125b5041c43f8e15723709f81aa8d5f4ccf);
uint256 x =28573233055232466711029625910063034642429572463461595413086259353299906450061;
uint256 y =39367742072897599771788408398752356480431855827262528811857788332151452825281;
WebAuthn.WebAuthnAuth memory auth = WebAuthn.WebAuthnAuth({
authenticatorData: hex"49960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000101",
clientDataJSON: string.concat(
'{"type":"webauthn.get","challenge":"', Base64Url.encode(challenge), '","origin":"http://localhost:3005"}'
),
challengeIndex: 23,
typeIndex: 1,
r: 43684192885701841787131392247364253107519555363555461570655060745499568693242,
s: 22655632649588629308599201066602670461698485748654492451178007896016452673579
});
Developing
After cloning the repo, run the tests using Forge, from Foundry
forge test
About
No description, website, or topics provided.
Resources
Readme
MIT license
Activity
Custom properties
Stars
290 stars
Watchers
21 watching
Forks
125 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Solidity WebAuthn Authentication Assertion Verifier
Webauthn-sol is a Solidity library for verifying WebAuthn authentication assertions. It builds on Daimo's WebAuthn.sol.
This library is optimized for Ethereum layer 2 rollup chains but will work on all EVM chains. Signature verification always attempts to use the RIP-7212 precompile and, if this fails, falls back to using FreshCryptoLib.
Important
FreshCryptoLib uses the ModExp precompile (address(0x05)), which is not supported on some chains, such as Polygon zkEVM. This library will not work on such chains, unless they support the RIP-7212 precompile.
Code excerpts
struct WebAuthnAuth {
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorassertionresponse-authenticatordatabytes authenticatorData;
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorresponse-clientdatajsonstring clientDataJSON;
/// The index at which "challenge":"..." occurs in clientDataJSONuint256 challengeIndex;
/// The index at which "type":"..." occurs in clientDataJSONuint256 typeIndex;
/// @dev The r value of secp256r1 signatureuint256 r;
/// @dev The s value of secp256r1 signatureuint256 s;
}
function verify(
bytesmemorychallenge,
boolrequireUserVerification,
WebAuthnAuth memorywebAuthnAuth,
uint256x,
uint256y
) internalviewreturns (bool) 
example usage
bytes challenge =abi.encode(0xf631058a3ba1116acce12396fad0a125b5041c43f8e15723709f81aa8d5f4ccf);
uint256 x =28573233055232466711029625910063034642429572463461595413086259353299906450061;
uint256 y =39367742072897599771788408398752356480431855827262528811857788332151452825281;
WebAuthn.WebAuthnAuth memory auth = WebAuthn.WebAuthnAuth({
authenticatorData: hex"49960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000101",
clientDataJSON: string.concat(
'{"type":"webauthn.get","challenge":"', Base64Url.encode(challenge), '","origin":"http://localhost:3005"}'
),
challengeIndex: 23,
typeIndex: 1,
r: 43684192885701841787131392247364253107519555363555461570655060745499568693242,
s: 22655632649588629308599201066602670461698485748654492451178007896016452673579
});
Developing
After cloning the repo, run the tests using Forge, from Foundry
forge test
About
No description, website, or topics provided.
Resources
Readme
MIT license
Activity
Custom properties
Stars
290 stars
Watchers
21 watching
Forks
125 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Solidity WebAuthn Authentication Assertion Verifier
Webauthn-sol is a Solidity library for verifying WebAuthn authentication assertions. It builds on Daimo's WebAuthn.sol.
This library is optimized for Ethereum layer 2 rollup chains but will work on all EVM chains. Signature verification always attempts to use the RIP-7212 precompile and, if this fails, falls back to using FreshCryptoLib.
Important
FreshCryptoLib uses the ModExp precompile (address(0x05)), which is not supported on some chains, such as Polygon zkEVM. This library will not work on such chains, unless they support the RIP-7212 precompile.
Code excerpts
struct WebAuthnAuth {
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorassertionresponse-authenticatordatabytes authenticatorData;
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorresponse-clientdatajsonstring clientDataJSON;
/// The index at which "challenge":"..." occurs in clientDataJSONuint256 challengeIndex;
/// The index at which "type":"..." occurs in clientDataJSONuint256 typeIndex;
/// @dev The r value of secp256r1 signatureuint256 r;
/// @dev The s value of secp256r1 signatureuint256 s;
}
function verify(
bytesmemorychallenge,
boolrequireUserVerification,
WebAuthnAuth memorywebAuthnAuth,
uint256x,
uint256y
) internalviewreturns (bool) 
example usage
bytes challenge =abi.encode(0xf631058a3ba1116acce12396fad0a125b5041c43f8e15723709f81aa8d5f4ccf);
uint256 x =28573233055232466711029625910063034642429572463461595413086259353299906450061;
uint256 y =39367742072897599771788408398752356480431855827262528811857788332151452825281;
WebAuthn.WebAuthnAuth memory auth = WebAuthn.WebAuthnAuth({
authenticatorData: hex"49960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000101",
clientDataJSON: string.concat(
'{"type":"webauthn.get","challenge":"', Base64Url.encode(challenge), '","origin":"http://localhost:3005"}'
),
challengeIndex: 23,
typeIndex: 1,
r: 43684192885701841787131392247364253107519555363555461570655060745499568693242,
s: 22655632649588629308599201066602670461698485748654492451178007896016452673579
});
Developing
After cloning the repo, run the tests using Forge, from Foundry
forge test
About
No description, website, or topics provided.
Resources
Readme
MIT license
Activity
Custom properties
Stars
290 stars
Watchers
21 watching
Forks
125 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Solidity WebAuthn Authentication Assertion Verifier
Webauthn-sol is a Solidity library for verifying WebAuthn authentication assertions. It builds on Daimo's WebAuthn.sol.
This library is optimized for Ethereum layer 2 rollup chains but will work on all EVM chains. Signature verification always attempts to use the RIP-7212 precompile and, if this fails, falls back to using FreshCryptoLib.
Important
FreshCryptoLib uses the ModExp precompile (address(0x05)), which is not supported on some chains, such as Polygon zkEVM. This library will not work on such chains, unless they support the RIP-7212 precompile.
Code excerpts
struct WebAuthnAuth {
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorassertionresponse-authenticatordatabytes authenticatorData;
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorresponse-clientdatajsonstring clientDataJSON;
/// The index at which "challenge":"..." occurs in clientDataJSONuint256 challengeIndex;
/// The index at which "type":"..." occurs in clientDataJSONuint256 typeIndex;
/// @dev The r value of secp256r1 signatureuint256 r;
/// @dev The s value of secp256r1 signatureuint256 s;
}
function verify(
bytesmemorychallenge,
boolrequireUserVerification,
WebAuthnAuth memorywebAuthnAuth,
uint256x,
uint256y
) internalviewreturns (bool) 
example usage
bytes challenge =abi.encode(0xf631058a3ba1116acce12396fad0a125b5041c43f8e15723709f81aa8d5f4ccf);
uint256 x =28573233055232466711029625910063034642429572463461595413086259353299906450061;
uint256 y =39367742072897599771788408398752356480431855827262528811857788332151452825281;
WebAuthn.WebAuthnAuth memory auth = WebAuthn.WebAuthnAuth({
authenticatorData: hex"49960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000101",
clientDataJSON: string.concat(
'{"type":"webauthn.get","challenge":"', Base64Url.encode(challenge), '","origin":"http://localhost:3005"}'
),
challengeIndex: 23,
typeIndex: 1,
r: 43684192885701841787131392247364253107519555363555461570655060745499568693242,
s: 22655632649588629308599201066602670461698485748654492451178007896016452673579
});
Developing
After cloning the repo, run the tests using Forge, from Foundry
forge test
About
No description, website, or topics provided.
Resources
Readme
MIT license
Activity
Custom properties
Stars
290 stars
Watchers
21 watching
Forks
125 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Solidity WebAuthn Authentication Assertion Verifier
Webauthn-sol is a Solidity library for verifying WebAuthn authentication assertions. It builds on Daimo's WebAuthn.sol.
This library is optimized for Ethereum layer 2 rollup chains but will work on all EVM chains. Signature verification always attempts to use the RIP-7212 precompile and, if this fails, falls back to using FreshCryptoLib.
Important
FreshCryptoLib uses the ModExp precompile (address(0x05)), which is not supported on some chains, such as Polygon zkEVM. This library will not work on such chains, unless they support the RIP-7212 precompile.
Code excerpts
struct WebAuthnAuth {
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorassertionresponse-authenticatordatabytes authenticatorData;
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorresponse-clientdatajsonstring clientDataJSON;
/// The index at which "challenge":"..." occurs in clientDataJSONuint256 challengeIndex;
/// The index at which "type":"..." occurs in clientDataJSONuint256 typeIndex;
/// @dev The r value of secp256r1 signatureuint256 r;
/// @dev The s value of secp256r1 signatureuint256 s;
}
function verify(
bytesmemorychallenge,
boolrequireUserVerification,
WebAuthnAuth memorywebAuthnAuth,
uint256x,
uint256y
) internalviewreturns (bool) 
example usage
bytes challenge =abi.encode(0xf631058a3ba1116acce12396fad0a125b5041c43f8e15723709f81aa8d5f4ccf);
uint256 x =28573233055232466711029625910063034642429572463461595413086259353299906450061;
uint256 y =39367742072897599771788408398752356480431855827262528811857788332151452825281;
WebAuthn.WebAuthnAuth memory auth = WebAuthn.WebAuthnAuth({
authenticatorData: hex"49960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000101",
clientDataJSON: string.concat(
'{"type":"webauthn.get","challenge":"', Base64Url.encode(challenge), '","origin":"http://localhost:3005"}'
),
challengeIndex: 23,
typeIndex: 1,
r: 43684192885701841787131392247364253107519555363555461570655060745499568693242,
s: 22655632649588629308599201066602670461698485748654492451178007896016452673579
});
Developing
After cloning the repo, run the tests using Forge, from Foundry
forge test
About
No description, website, or topics provided.
Resources
Readme
MIT license
Activity
Custom properties
Stars
290 stars
Watchers
21 watching
Forks
125 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
Solidity WebAuthn Authentication Assertion Verifier
Webauthn-sol is a Solidity library for verifying WebAuthn authentication assertions. It builds on Daimo's WebAuthn.sol.
This library is optimized for Ethereum layer 2 rollup chains but will work on all EVM chains. Signature verification always attempts to use the RIP-7212 precompile and, if this fails, falls back to using FreshCryptoLib.
Important
FreshCryptoLib uses the ModExp precompile (address(0x05)), which is not supported on some chains, such as Polygon zkEVM. This library will not work on such chains, unless they support the RIP-7212 precompile.
Code excerpts
struct WebAuthnAuth {
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorassertionresponse-authenticatordatabytes authenticatorData;
/// @dev https://www.w3.org/TR/webauthn-2/#dom-authenticatorresponse-clientdatajsonstring clientDataJSON;
/// The index at which "challenge":"..." occurs in clientDataJSONuint256 challengeIndex;
/// The index at which "type":"..." occurs in clientDataJSONuint256 typeIndex;
/// @dev The r value of secp256r1 signatureuint256 r;
/// @dev The s value of secp256r1 signatureuint256 s;
}
function verify(
bytesmemorychallenge,
boolrequireUserVerification,
WebAuthnAuth memorywebAuthnAuth,
uint256x,
uint256y
) internalviewreturns (bool) 
example usage
bytes challenge =abi.encode(0xf631058a3ba1116acce12396fad0a125b5041c43f8e15723709f81aa8d5f4ccf);
uint256 x =28573233055232466711029625910063034642429572463461595413086259353299906450061;
uint256 y =39367742072897599771788408398752356480431855827262528811857788332151452825281;
WebAuthn.WebAuthnAuth memory auth = WebAuthn.WebAuthnAuth({
authenticatorData: hex"49960de5880e8c687434170f6476605b8fe4aeb9a28632c7995cf3ba831d97630500000101",
clientDataJSON: string.concat(
'{"type":"webauthn.get","challenge":"', Base64Url.encode(challenge), '","origin":"http://localhost:3005"}'
),
challengeIndex: 23,
typeIndex: 1,
r: 43684192885701841787131392247364253107519555363555461570655060745499568693242,
s: 22655632649588629308599201066602670461698485748654492451178007896016452673579
});
Developing
After cloning the repo, run the tests using Forge, from Foundry
forge test
About
No description, website, or topics provided.
Resources
Readme
MIT license
Activity
Custom properties
Stars
290 stars
Watchers
21 watching
Forks
125 forks
Report repository
Releases
Packages
Used by
Contributors
Languages