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Added Authentication to Gateway (not finished and tested yet)
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34 changes: 34 additions & 0 deletions
34
gateway-service/src/main/kotlin/com/michibaum/gatewayservice/AuthenticationFilter.kt
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package com.michibaum.gatewayservice | ||
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import org.springframework.cloud.gateway.filter.GatewayFilter | ||
import org.springframework.cloud.gateway.filter.GatewayFilterChain | ||
import org.springframework.http.HttpStatus | ||
import org.springframework.http.server.reactive.ServerHttpResponse | ||
import org.springframework.stereotype.Component | ||
import org.springframework.web.server.ServerWebExchange | ||
import reactor.core.publisher.Mono | ||
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@Component | ||
class AuthenticationFilter(private val authenticationValidator: AuthenticationValidator): GatewayFilter { | ||
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override fun filter(exchange: ServerWebExchange?, chain: GatewayFilterChain?): Mono<Void> { | ||
exchange?.let { | ||
val authHeaders = it.request.headers["Authorization"] | ||
val headerExists = (authHeaders?.size ?: 0) == 1 | ||
if(headerExists){ | ||
val authHeader = authHeaders!![0] | ||
val valid = authenticationValidator.valid(authHeader) | ||
if(valid) { | ||
return chain!!.filter(exchange); // Forward to route | ||
} | ||
} | ||
} | ||
return exchange!!.let { this.onError(it) } | ||
} | ||
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private fun onError(exchange: ServerWebExchange): Mono<Void> { | ||
val response: ServerHttpResponse = exchange.response | ||
response.setStatusCode(HttpStatus.FORBIDDEN) | ||
return response.setComplete() | ||
} | ||
} |
16 changes: 16 additions & 0 deletions
16
gateway-service/src/main/kotlin/com/michibaum/gatewayservice/AuthenticationValidator.kt
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package com.michibaum.gatewayservice | ||
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import com.michibaum.authentication_library.JWSValidator | ||
import org.springframework.stereotype.Component | ||
import java.security.interfaces.RSAPublicKey | ||
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@Component | ||
class AuthenticationValidator: JWSValidator() { | ||
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var publicKey: RSAPublicKey? = null | ||
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fun valid(token: String): Boolean { | ||
return this.validate(token, publicKey) | ||
} | ||
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} |
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