Error on commands manager arguments parsing

[GGP1]

Description

During wazuh/wazuh#27765, I've modified the commands action args field to use an object instead of a list. However, when I tried sending commands with the new format, the commands manager failed to parse them.

gasti@gasti:~/work/wazuh/apis/tools/env$ curl -H "Content-Type: application/json" -ksu admin:admin -X POST https://localhost:9200/_plugins/_command_manager/commands -d '{"commands": [{"source": "Users/Services", "user": "Management API", "target": {"id": "0a96a0ab-5bef-415c-bb3c-ea3e294215a0", "type": "agent"}, "action": {"name": "set-group","version": "5.0.0", "args": {"groups": ["group1"]}}, "timeout": 100}]}' | jq
{
  "error": {
    "root_cause": [
      {
        "type": "illegal_state_exception",
        "reason": "Can't get text on a START_ARRAY at 1:215"
      }
    ],
    "type": "illegal_state_exception",
    "reason": "Can't get text on a START_ARRAY at 1:215"
  },
  "status": 500
}

As the error message indicates, the parser is expecting args.groups to have a string value instead of an array.

I tried replacing the array with a string and the commands manager parsed it successfully

String value

gasti@gasti:~/work/wazuh/apis/tools/env$ curl -H "Content-Type: application/json" -ksu admin:admin -X POST https://localhost:9200/_plugins/_command_manager/commands -d '{"commands": [{"source": "Users/Services", "user": "Management API", "target": {"id": "0a96a0ab-5bef-415c-bb3c-ea3e294215a0", "type": "agent"}, "action": {"name": "set-group","version": "5.0.0", "args": {"groups": "group1"}}, "timeout": 100}]}' | jq
{
  "_index": ".commands",
  "_documents": [
    {
      "_id": "QSoYk5QBINEOAlt36j7M"
    }
  ],
  "result": "OK"
}

I also tried indexing the command directly to see if there was an issue with the template. It didn't fail, so the issue must be in the commands manager parsing

Index command

gasti@gasti:~/work/wazuh/apis/tools/env$ curl -H "Content-Type: application/json" -ksu admin:admin -X POST https://localhost:9200/.commands/_doc -d '{"source": "Users/Services", "user": "Management API", "target": {"id": "0a96a0ab-5bef-415c-bb3c-ea3e294215a0", "type": "agent"}, "action": {"name": "set-group","version": "5.0.0", "args": {"groups": ["group1"]}}, "timeout": 100}' | jq
{                         
  "_index": ".commands",                         
  "_id": "PioSk5QBINEOAlt3WD5H",                         
  "_version": 1,                         
  "result": "created",                         
  "_shards": {                         
    "total": 1,                         
    "successful": 1,                         
    "failed": 0                         
  },                         
  "_seq_no": 0,                         
  "_primary_term": 1                         
}

The same error was received when I tried using another object as the groups key value

Object value

gasti@gasti:~/work/wazuh/apis/tools/env$ curl -H "Content-Type: application/json" -ksu admin:admin -X POST https://localhost:9200/_plugins/_command_manager/commands -d '{"commands": [{"source": "Users/Services", "user": "Management API", "target": {"id": "0a96a0ab-5bef-415c-bb3c-ea3e294215a0", "type": "agent"}, "action": {"name": "set-group","version":
 "5.0.0", "args": {"groups": {"1": "group1"}}}, "timeout": 100}]}' | jq
{
  "error": {
    "root_cause": [
      {
        "type": "illegal_state_exception",
        "reason": "Can't get text on a START_OBJECT at 1:215"
      }
    ],
    "type": "illegal_state_exception",
    "reason": "Can't get text on a START_OBJECT at 1:215"
  },
  "status": 500
}

This issue aims at fixing the parsing for it to accept any kind of nested values.