package com.example.authorization.config; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import java.math.BigInteger; import java.security.KeyFactory; import java.security.KeyPair; import java.security.spec.RSAPrivateKeySpec; import java.security.spec.RSAPublicKeySpec; /** * An Authorization Server will more typically have a key rotation strategy, and the keys will not * be hard-coded into the application code. * * For simplicity, though, this sample doesn't demonstrate key rotation. */ @Configuration public class KeyConfig { @Bean KeyPair keyPair() { try { String privateExponent = "3851612021791312596791631935569878540203393691253311342052463788814433805390794604753109719790052408607029530149004451377846406736413270923596916756321977922303381344613407820854322190592787335193581632323728135479679928871596911841005827348430783250026013354350760878678723915119966019947072651782000702927096735228356171563532131162414366310012554312756036441054404004920678199077822575051043273088621405687950081861819700809912238863867947415641838115425624808671834312114785499017269379478439158796130804789241476050832773822038351367878951389438751088021113551495469440016698505614123035099067172660197922333993"; String modulus = "18044398961479537755088511127417480155072543594514852056908450877656126120801808993616738273349107491806340290040410660515399239279742407357192875363433659810851147557504389760192273458065587503508596714389889971758652047927503525007076910925306186421971180013159326306810174367375596043267660331677530921991343349336096643043840224352451615452251387611820750171352353189973315443889352557807329336576421211370350554195530374360110583327093711721857129170040527236951522127488980970085401773781530555922385755722534685479501240842392531455355164896023070459024737908929308707435474197069199421373363801477026083786683"; String exponent = "65537"; RSAPublicKeySpec publicSpec = new RSAPublicKeySpec(new BigInteger(modulus), new BigInteger(exponent)); RSAPrivateKeySpec privateSpec = new RSAPrivateKeySpec(new BigInteger(modulus), new BigInteger(privateExponent)); KeyFactory factory = KeyFactory.getInstance("RSA"); return new KeyPair(factory.generatePublic(publicSpec), factory.generatePrivate(privateSpec)); } catch ( Exception e ) { throw new IllegalArgumentException(e); } } }