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README.md
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README.md
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# DGCServerVerifier
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## what is it?
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This web server takes a post request on /api/green with a json object as body.
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Verifies if the data are correct:
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* Downloads the last rules released on https://get.dgc.gov.it/v1/dgc/settings
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* Downloads the valid keys on https://get.dgc.gov.it/v1/dgc/signercertificate/status and https://get.dgc.gov.it/v1/dgc/signercertificate/update.
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* Verifies that the certificate is correctly encoded, as per standard.
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* Verifies signature on the certificate is still valid as the day of the request.
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* Verifies that DGC provided is still valid as today using the setting in the first point.
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## how does it work?
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To perform a request to the endpoint, preferably behind a reverse proxy in HTTPS, you should
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build a JSON object with this structure:
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{key:'HC1:6BFOXN%TS3DHPVO13J /G-/2YRVA.Q/R8VRU2FC1J9M$DI9C3K9$:L44HRJPC%OQHIZC4.OI1RM8ZA.A5:S9MKN4NN3F85QNCY0O%0VZ001HOC9JU0D0HT0HB2PL/IB*09B9LW4T*8+DC9I0%YB/VM$*SBAKYE9*FJ7ID$0HY84Q:GY3LV2LW 2C0IO$571IL+9J2P6%24.8P+5E/HW.CV2L%3L%*8PHN6D7LLK*2HG%89UV-0LZ 2ZJJ %C4IJZJJBY43%8 C1VHLEC78G1TFHM*K2ILS-O:S9UZ4+FJE 4Y3LO78L:P...ecc'}
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The string is the raw value read from a QR code reader app.
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## what does it returns?
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When the request is complete, the server returns a JSON object with this structure:
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{
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"signature": {
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"valid": true,
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},
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"valid": {
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"valid": true,
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"message": "Certificate is valid"
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}
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}
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## third party copyright notice
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This software uses the library [DCC Utils](https://github.com/ministero-salute/dcc-utils) written by ministero-salute
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@ -5,7 +5,6 @@ import timezone from 'dayjs/plugin/timezone';
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interface checkResult {
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valid: boolean;
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message: string;
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type: string;
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}
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export class VaccineVerifier {
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@ -33,7 +32,7 @@ export class VaccineVerifier {
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const vaccineDiff = payload.sd - payload.dn;
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const baseRuleIndex = validRulesSet.findIndex((elem:any)=>{ return elem.name == this.vaccineEndDayComplete;});
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if( baseRuleIndex == -1)
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return {valid:false, message:'Invaild set of rules check with operator', type:'vaccine'};
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return {valid:false, message:'Invaild set of rules check with operator'};
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if(vaccineDiff <= 0){
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return this.getLogicValidityDays(validRulesSet, this.vaccineStartDayComplete, this.vaccineEndDayComplete,inoculationDate);
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} else {
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@ -46,16 +45,16 @@ export class VaccineVerifier {
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const dateFrom = dayjs(payload.df);
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const dateEnd = dayjs(payload.du);
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if(now.isAfter(dateFrom) && now.isBefore(dateEnd)){
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return{valid:true, message:'Certificate is valid', type:'recovery'};
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return{valid:true, message:'Certificate is valid'};
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}
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return {valid:false, message:'toimplement', type:'recovery'};
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return {valid:false, message:'toimplement'};
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}
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private checkTest = (payload:any):checkResult => {
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const validRulesSet = this.getRulesSet('GENERIC');
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const testType = payload.tt;
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if(payload.tr === this.positiveTest)
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return {valid:false, message:'The test detected the virus',type:'test'};
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return {valid:false, message:'The test detected the virus'};
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const collectionDateTime = dayjs.tz(payload.sc,'UTC').tz(dayjs.tz.guess());
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if(testType == this.rapidTest){
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return this.getLogicValidityHours(validRulesSet,this.rapidTestStartHour,this.rapidTestEndHour,collectionDateTime);
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@ -63,7 +62,7 @@ export class VaccineVerifier {
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if(testType == this.molecularTest){
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return this.getLogicValidityHours(validRulesSet,this.molecularTestStartHour,this.molecularTestEndHour,collectionDateTime);
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}
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return {valid:false, message:'unknown test type',type:'test'};
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return {valid:false, message:'unknown test type'};
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}
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private functionSelector = {
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@ -110,9 +109,9 @@ export class VaccineVerifier {
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const ruleEnd = validRulesSet.find((elem:any)=>{return elem.name == endKey;});
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const startValidity = inoculationDate.add(parseInt(ruleStart['value']),'days');
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const endValidity = inoculationDate.add(parseInt(ruleEnd['value']),'days');
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if(startValidity.isAfter(now)) return {valid:false, message:'Certificate not yet valid', type:'vaccine'};
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if(now.isAfter(endValidity)) return {valid:false, message:'Certificate not more valid', type:'vaccine'};
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return {valid:true, message:'Certificate is valid', type:'vaccine'};
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if(startValidity.isAfter(now)) return {valid:false, message:'Certificate not yet valid'};
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if(now.isAfter(endValidity)) return {valid:false, message:'Certificate not more valid'};
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return {valid:true, message:'Certificate is valid'};
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}
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private getLogicValidityHours(validRulesSet:unknown[],startKey:string, endKey:string, inoculationDate: dayjs.Dayjs): checkResult {
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@ -121,9 +120,9 @@ export class VaccineVerifier {
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const ruleEnd = validRulesSet.find((elem:any)=>{return elem.name == endKey;});
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const startValidity = inoculationDate.add(parseInt(ruleStart['value']),'hours');
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const endValidity = inoculationDate.add(parseInt(ruleEnd['value']),'hours');
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if(startValidity.isAfter(now)) return {valid:false, message:'Certificate not yet valid', type:'test'};
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if(now.isAfter(endValidity)) return {valid:false, message:'Certificate not more valid', type:'test'};
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return {valid:true, message:'Certificate is valid', type:'test'};
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if(startValidity.isAfter(now)) return {valid:false, message:'Certificate not yet valid'};
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if(now.isAfter(endValidity)) return {valid:false, message:'Certificate not more valid'};
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return {valid:true, message:'Certificate is valid'};
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}
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}
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@ -25,7 +25,7 @@ export default class Verifier {
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async checkCertificate(certificate:string): Promise<unknown>{
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const dcc = await DCC.fromRaw(certificate);
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let result:unknown = {};
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result = await this.checkKey(dcc);
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result = await (await this.checkKey(dcc)).valid;
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const vaccineVerifier = new VaccineVerifier(await this.ruleDownloader.getRules());
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result = {signature: result, valid: vaccineVerifier.checkCertifcate(dcc.payload)};
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return result;
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