{
  "kind": "open-flow-workflow",
  "version": 1,
  "name": "Validate a TOTP Code",
  "content": {
    "modelVersion": 14,
    "document": {
      "bindings": {},
      "graph": {
        "nodes": {
          "n_84c77d81a9bc3199": {
            "name": "Enter the code",
            "kind": "start",
            "inputDefs": [
              {
                "jsonSchema": {
                  "type": "string"
                },
                "nullable": false,
                "handle": "code"
              }
            ]
          },
          "n_ee081add5ca48aa0": {
            "inputs": {
              "secret": {
                "kind": "unset"
              },
              "code": {
                "kind": "sources",
                "sources": [
                  {
                    "kind": "node",
                    "nodeId": "n_84c77d81a9bc3199",
                    "output": "code"
                  }
                ]
              }
            },
            "name": "Validate current TOTP",
            "kind": "task",
            "task": {
              "inputs": [
                {
                  "jsonSchema": {
                    "type": "string"
                  },
                  "nullable": false,
                  "handle": "secret"
                },
                {
                  "jsonSchema": {
                    "type": "string"
                  },
                  "nullable": false,
                  "handle": "code"
                }
              ],
              "outputs": [
                {
                  "jsonSchema": {
                    "type": "integer",
                    "enum": [
                      0,
                      1
                    ]
                  },
                  "nullable": false,
                  "handle": "status"
                }
              ],
              "name": "Validate current TOTP",
              "moduleId": "n_77e6e8b9caaeeb8b",
              "capabilities": [
                {
                  "kind": "connector",
                  "mode": "independent",
                  "actions": []
                }
              ]
            }
          },
          "n_918338017350a09c": {
            "name": "Validation result",
            "kind": "outputs",
            "outputDefs": [
              {
                "jsonSchema": {
                  "type": "integer",
                  "enum": [
                    0,
                    1
                  ]
                },
                "nullable": false,
                "handle": "status"
              }
            ],
            "outputMappings": {
              "status": {
                "kind": "sources",
                "sources": [
                  {
                    "kind": "node",
                    "nodeId": "n_ee081add5ca48aa0",
                    "output": "status"
                  }
                ]
              }
            }
          }
        },
        "edges": [
          {
            "source": "n_84c77d81a9bc3199",
            "target": "n_ee081add5ca48aa0"
          },
          {
            "source": "n_ee081add5ca48aa0",
            "target": "n_918338017350a09c"
          }
        ]
      }
    },
    "modules": {
      "n_77e6e8b9caaeeb8b": {
        "name": "Validate current TOTP",
        "imports": [],
        "source": "import{createHmac}from'node:crypto';import{Buffer}from'node:buffer';\nexport default function verify({secret,code}){const alphabet='ABCDEFGHIJKLMNOPQRSTUVWXYZ234567',s=secret.toUpperCase().replace(/=+$/,'');if(!s||!/^[A-Z2-7]+$/.test(s)||![0,2,4,5,7].includes(s.length%8))throw Error('Invalid Base32 secret');let bits=0,v=0,bytes=[];for(const c of s){v=(v<<5)|alphabet.indexOf(c);bits+=5;if(bits>=8){bits-=8;bytes.push((v>>>bits)&255)}}const counter=BigInt(Math.floor(Date.now()/30000)),buffer=Buffer.alloc(8);for(let i=0;i<8;i++)buffer[7-i]=Number((counter>>BigInt(i*8))&255n);const digest=createHmac('sha1',Buffer.from(bytes)).update(buffer).digest(),off=digest[digest.length-1]&15,n=(((digest[off]&127)<<24)|(digest[off+1]<<16)|(digest[off+2]<<8)|digest[off+3])%1000000;return{status:String(n).padStart(6,'0')===code?1:0}}\n"
      }
    }
  },
  "presentation": {
    "designer": {
      "version": 1,
      "flow": {
        "direction": "vertical"
      }
    }
  }
}