(Objective-C) Azure Key Vault Get Certificates

See more Azure Key Vault Examples

Demonstrates how to list the certificates in an Azure Key Vault.

Note: This example requires Chilkat v9.5.0.96 or later.

For more information, see https://learn.microsoft.com/en-us/rest/api/keyvault/certificates/get-certificates/get-certificates?tabs=HTTP

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#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <CkoStringBuilder.h>
#import <NSString.h>

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// We demonstrated how to get an access token for your Azure Key Vault
// in this example: Azure Key Vault Get OAuth2 Access Token using Client Credentials

// However.. starting in Chilkat v9.5.0.96, instead of directly providing Chilkat with the OAuth2 access token,
// you can instead provide the means for Chilkat to automatically get the OAuth2 access token,
// and in addition, Chilkat will automatically re-fetch a new OAuth2 access token as needed, such as shortly 
// prior to or after expiration.

// You do this by setting the AuthToken property to a JSON string that contains the required information.

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"client_id" value: @"APP_ID"];

// The APP_PASSWORD is the "password" returned by the Azure CLI command: az ad sp create-for-rbac --name http://example.com --role Contributor
// See Azure Key Vault Get OAuth2 Access Token using Client Credentials
[json UpdateString: @"client_secret" value: @"APP_PASSWORD"];

// The access token will be for Azure Key Vault operations.
[json UpdateString: @"resource" value: @"https://vault.azure.net"];

// Specify the token endpoint which includes your tenant ID.
[json UpdateString: @"token_endpoint" value: @"https://login.microsoftonline.com/TENANT_ID/oauth2/token"];

CkoHttp *http = [[CkoHttp alloc] init];

// Instead of providing an actual access token, we give Chilkat the information that allows it to 
// automatically fetch the access token using the OAuth2 client credentials flow.
http.AuthToken = [json Emit];

// Replace key_vault_name with the name of your Azure Key Vault.
CkoStringBuilder *sbResponse = [[CkoStringBuilder alloc] init];
BOOL success = [http QuickGetSb: @"https://key_vault_name.vault.azure.net/certificates?api-version=7.4" sbContent: sbResponse];
if (success == NO) {

    int statusCode = [http.LastStatus intValue];
    if (statusCode == 0) {
        // We did not get a response from the server..
        NSLog(@"%@",http.LastErrorText);
    }
    else {
        // We received a response, but it was an error.
        NSLog(@"%@%d",@"Error response status code: ",statusCode);
        NSLog(@"%@",@"Error response:");
        NSLog(@"%@",[sbResponse GetAsString]);
    }

    return;
}

CkoJsonObject *jsonResp = [[CkoJsonObject alloc] init];
[jsonResp LoadSb: sbResponse];
jsonResp.EmitCompact = NO;

NSLog(@"%@",[jsonResp Emit]);

// The output looks like this:

// {
//   "value": [
//     {
//       "id": "https://kvchilkat.vault.azure.net/certificates/BadSSL",
//       "x5t": "U04xLnb8Ww7BKkW9dD7P1cCHNDY",
//       "attributes": {
//         "enabled": true,
//         "nbf": 1674409014,
//         "exp": 1737481014,
//         "created": 1697294224,
//         "updated": 1697294224
//       },
//       "subject": ""
//     },
//     {
//       "id": "https://kvchilkat.vault.azure.net/certificates/Brasil",
//       "x5t": "ayF5eBtlA35xPMivusE0wpmFjnA",
//       "attributes": {
//         "enabled": true,
//         "nbf": 1667830002,
//         "exp": 1699366002,
//         "created": 1697294090,
//         "updated": 1697294090
//       },
//       "subject": ""
//     }
//   ],
//   "nextLink": null
// }

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

NSString *id = 0;
NSString *x5t = 0;
BOOL Enabled;
int Nbf;
int Exp;
int Created;
int Updated;
NSString *subject = 0;

int i = 0;
int count_i = [[jsonResp SizeOfArray: @"value"] intValue];
while (i < count_i) {
    jsonResp.I = [NSNumber numberWithInt: i];
    id = [jsonResp StringOf: @"value[i].id"];
    x5t = [jsonResp StringOf: @"value[i].x5t"];
    Enabled = [jsonResp BoolOf: @"value[i].attributes.enabled"];
    Nbf = [[jsonResp IntOf: @"value[i].attributes.nbf"] intValue];
    Exp = [[jsonResp IntOf: @"value[i].attributes.exp"] intValue];
    Created = [[jsonResp IntOf: @"value[i].attributes.created"] intValue];
    Updated = [[jsonResp IntOf: @"value[i].attributes.updated"] intValue];
    subject = [jsonResp StringOf: @"value[i].subject"];
    i = i + 1;
}