{"id":21658079,"url":"https://github.com/tsirysndr/react-native-key-encoder","last_synced_at":"2026-05-18T00:05:43.558Z","repository":{"id":57337925,"uuid":"109607607","full_name":"tsirysndr/react-native-key-encoder","owner":"tsirysndr","description":"React Native library for encoding and decoding ecdsa private keys and converting between 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unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["react-native","secp256k1"],"created_at":"2024-11-25T09:28:37.484Z","updated_at":"2026-05-18T00:05:38.551Z","avatar_url":"https://github.com/tsirysndr.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"#React Native Key Encoder JS\n\n### Installation\n\n```\n$ npm install react-native-key-encoder\n```\n\n### Getting Started\n\nTo get started, first define your key encoder and raw private/public keys.\n\n#### SECP256k1 Key Encoders\n\n```js\nvar KeyEncoder = require('react-native-key-encoder'),\n    keyEncoder = new KeyEncoder('secp256k1')\n```\n\nAs shown above, there is built in support for SECP256k1 (the curve Bitcoin uses), but you can pass in your own curve parameters for any curve you'd like.\n\n#### Key Encoders w/ Custom Curves\n\n```js\nvar EC = require('elliptic').ec\nvar encoderOptions = {\n    curveParameters: [1, 3, 132, 0, 10],\n    privatePEMOptions: {label: 'EC PRIVATE KEY'},\n    publicPEMOptions: {label: 'PUBLIC KEY'},\n    curve: new EC('secp256k1')\n}\nvar keyEncoder = new KeyEncoder(encoderOptions)\n```\n\n#### Declaring Raw Keys\n\n```js\nvar rawPrivateKey = '844055cca13efd78ce79a4c3a4c5aba5db0ebeb7ae9d56906c03d333c5668d5b',\n    rawPublicKey = '04147b79e9e1dd3324ceea115ff4037b6c877c73777131418bfb2b713effd0f502327b923861581bd5535eeae006765269f404f5f5c52214e9721b04aa7d040a75'\n```\n\n### Encoding Private Keys\n\nEncode to and from raw, PEM, and DER formats.\n\n#### Encoding Private Keys as PEMs\n\n```js\nvar pemPrivateKey = keyEncoder.encodePrivate(rawPrivateKey, 'raw', 'pem')\n```\n\nExample output:\n\n```\n-----BEGIN EC PRIVATE KEY-----\nMHQCAQEEIIRAVcyhPv14znmkw6TFq6XbDr63rp1WkGwD0zPFZo1boAcGBSuBBAAK\noUQDQgAEFHt56eHdMyTO6hFf9AN7bId8c3dxMUGL+ytxPv/Q9QIye5I4YVgb1VNe\n6uAGdlJp9AT19cUiFOlyGwSqfQQKdQ==\n-----END EC PRIVATE KEY-----\n```\n\n#### Encoding Private Keys to DER Format\n\n```js\nvar derPrivateKey = keyEncoder.encodePrivate(rawPrivateKey, 'raw', 'der')\n```\n\nExample output:\n\n```\n30740201010420844055cca13efd78ce79a4c3a4c5aba5db0ebeb7ae9d56906c03d333c5668d5ba00706052b8104000aa14403420004147b79e9e1dd3324ceea115ff4037b6c877c73777131418bfb2b713effd0f502327b923861581bd5535eeae006765269f404f5f5c52214e9721b04aa7d040a75\n```\n\n### Encoding Public Keys\n\nEncode to and from raw, PEM, and DER formats.\n\n#### Encoding Public Keys as PEMs\n\n```js\nvar pemPublicKey = keyEncoder.encodePublic(rawPublicKey, 'raw', 'pem')\n```\n\nExample output:\n\n```\n-----BEGIN PUBLIC KEY-----\nMFYwEAYHKoZIzj0CAQYFK4EEAAoDQgAEFHt56eHdMyTO6hFf9AN7bId8c3dxMUGL\n+ytxPv/Q9QIye5I4YVgb1VNe6uAGdlJp9AT19cUiFOlyGwSqfQQKdQ==\n-----END PUBLIC KEY-----\n```\n\n#### Encoding Public Keys to DER Format\n\n```js\nvar derPublicKey = keyEncoder.encodePublic(rawPublicKey, 'raw', 'der')\n```\n\nExample output:\n\n```\n3056301006072a8648ce3d020106052b8104000a03420004147b79e9e1dd3324ceea115ff4037b6c877c73777131418bfb2b713effd0f502327b923861581bd5535eeae006765269f404f5f5c52214e9721b04aa7d040a75\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ftsirysndr%2Freact-native-key-encoder","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ftsirysndr%2Freact-native-key-encoder","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ftsirysndr%2Freact-native-key-encoder/lists"}