46 lines
1.7 KiB
JavaScript
46 lines
1.7 KiB
JavaScript
/*
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Onionr - Private P2P Communication
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Provides userIcon which generates SVG identicons from a Onionr user pubkey
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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function toHexString(byteArray) {
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// cc-by-sa-4 https://stackoverflow.com/a/44608819 by https://stackoverflow.com/users/1883624/grantpatterson
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var s = '0x'
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byteArray.forEach(function(byte) {
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s += ('0' + (byte & 0xFF).toString(16)).slice(-2)
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})
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return s
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}
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async function sha256(str) {
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const buf = await crypto.subtle.digest("SHA-256", new TextEncoder("utf-8").encode(str))
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return Array.prototype.map.call(new Uint8Array(buf), x=>(('00'+x.toString(16)).slice(-2))).join('')
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}
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async function userIcon(pubkey, imgSize=64){
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pubkey = await sha256(base32.decode.asBytes(pubkey))
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let options = {
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//foreground: [0,0,0,1], // rgba black
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background: [0, 0, 0, 0], // rgba white
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//margin: 0.1,
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size: imgSize,
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format: 'svg' // use SVG instead of PNG
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};
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// create a base64 encoded SVG
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let data = new Identicon(pubkey, options).toString();
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return data
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} |