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# AWS::ACMPCA::Certificate ExtendedKeyUsage
<a name="aws-properties-acmpca-certificate-extendedkeyusage"></a>

Specifies additional purposes for which the certified public key may be used other than basic purposes indicated in the `KeyUsage` extension.

## Syntax
<a name="aws-properties-acmpca-certificate-extendedkeyusage-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-acmpca-certificate-extendedkeyusage-syntax.json"></a>

```
{
  "[ExtendedKeyUsageObjectIdentifier](#cfn-acmpca-certificate-extendedkeyusage-extendedkeyusageobjectidentifier)" : String,
  "[ExtendedKeyUsageType](#cfn-acmpca-certificate-extendedkeyusage-extendedkeyusagetype)" : String
}
```

### YAML
<a name="aws-properties-acmpca-certificate-extendedkeyusage-syntax.yaml"></a>

```
  [ExtendedKeyUsageObjectIdentifier](#cfn-acmpca-certificate-extendedkeyusage-extendedkeyusageobjectidentifier): String
  [ExtendedKeyUsageType](#cfn-acmpca-certificate-extendedkeyusage-extendedkeyusagetype): String
```

## Properties
<a name="aws-properties-acmpca-certificate-extendedkeyusage-properties"></a>

`ExtendedKeyUsageObjectIdentifier`  <a name="cfn-acmpca-certificate-extendedkeyusage-extendedkeyusageobjectidentifier"></a>
Specifies a custom `ExtendedKeyUsage` with an object identifier (OID).  
*Required*: No  
*Type*: String  
*Pattern*: `([0-2])\.([0-9]|([0-3][0-9]))((\.([0-9]+)){0,126})`  
*Minimum*: `0`  
*Maximum*: `64`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`ExtendedKeyUsageType`  <a name="cfn-acmpca-certificate-extendedkeyusage-extendedkeyusagetype"></a>
Specifies a standard `ExtendedKeyUsage` as defined as in [RFC 5280](https://datatracker.ietf.org/doc/html/rfc5280#section-4.2.1.12).  
*Required*: No  
*Type*: String  
*Allowed values*: `SERVER_AUTH | CLIENT_AUTH | CODE_SIGNING | EMAIL_PROTECTION | TIME_STAMPING | OCSP_SIGNING | SMART_CARD_LOGIN | DOCUMENT_SIGNING | CERTIFICATE_TRANSPARENCY`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)