publicKeys.json

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "2017.09.01.0",
  "parameters": {
    "path": {
      "type": "string",
      "metadata": {
        "description": "Specifies the full path on the created VM where ssh public key is stored. If the file already exists, the specified key is appended to the file."
      }
    },
    "keyData": {
      "type": "string",
      "metadata": {
        "description": "SSH public key certificate used to authenticate with the VM through ssh. The key needs to be at least 2048-bit and in ssh-rsa format."
      }
    }
  },
  "variables": {
    "comments": {
      "definition": "https://docs.microsoft.com/en-us/rest/api/compute/virtualmachines/virtualmachines-create-or-update#bk_publicKeys"
    },
    "publicKeys": {
      "path": "[parameters('path')]",
      "keyData": "[parameters('keyData')]"
    }
  },
  "resources": [
  ],
  "outputs": {
    "publicKeys": {
      "type": "object",
      "value": "[variables('publicKeys')]"
    }
  }
}