unwrap Key - unwrap Key

Service:

Key Vault

API Version:

7.4

Unwraps a symmetric key using the specified key that was initially used for wrapping that key.
The UNWRAP operation supports decryption of a symmetric key using the target key encryption key. This operation is the reverse of the WRAP operation. The UNWRAP operation applies to asymmetric and symmetric keys stored in Azure Key Vault since it uses the private portion of the key. This operation requires the keys/unwrapKey permission.

POST {vaultBaseUrl}/keys/{key-name}/{key-version}/unwrapkey?api-version=7.4

URI Parameters

Name	In	Required	Type	Description
key-name	path	True	string	The name of the key.
key-version	path	True	string	The version of the key.
vaultBaseUrl	path	True	string	The vault name, for example https://myvault.vault.azure.net.
api-version	query	True	string	Client API version.

Request Body

Name	Required	Type	Description
alg	True	JsonWebKeyEncryptionAlgorithm minLength: 1	algorithm identifier
value	True	string (base64url)
aad		string (base64url)	Additional data to authenticate but not encrypt/decrypt when using authenticated crypto algorithms.
iv		string (base64url)	Cryptographically random, non-repeating initialization vector for symmetric algorithms.
tag		string (base64url)	The tag to authenticate when performing decryption with an authenticated algorithm.

Responses

Name	Type	Description
200 OK	KeyOperationResult	The unwrapped symmetric key.
Other Status Codes	KeyVaultError	Key Vault error response describing why the operation failed.

Examples

Unwrapkey

Sample request

HTTP

POST https://myvault.vault.azure.net//keys/sdktestkey/0698c2156c1a4e1da5b6bab6f6422fd6/unwrapkey?api-version=7.4

{
  "alg": "RSA1_5",
  "value": "khwIe26NuAZazS7upywDBpGRmRNMW5-4h_JQKxOdB78nYVxZWnBXwCxOv7a3Sr_mCjiVzKsoQQZwL-CJzhYa0512tfYem56zls5a44y5QsdcfvuSzOvpthVhA9XkEfCJSqSY_sip5d8BelT_w_ikvd_8KqiQ_0H54RqYUN8svCpu28paHgBocHFNXTQ9NtU9ec2qgESXk7Jp4OTy9HJtQJavKDUqTJ3YmtLxUgsgBCe0FNMHUSEYC0Ys6PavYzdTwIzYCq84idmAxJOj-O_6eALJFH2sDTOQYHjzOae2t8eFmw6C-t55qjrCI91a9mUJEGPhYixiG4gR4PaEJ7wGvw"
}

Sample response

Status code:

200

{
  "kid": "https://myvault.vault.azure.net/keys/sdktestkey/0698c2156c1a4e1da5b6bab6f6422fd6",
  "value": "ovQIlbB0DgWhZA7sgkPxbg9H-Ly-VlNGPSgGrrZvlIo"
}

Definitions

Name	Description
Error	The key vault server error.
JsonWebKeyEncryptionAlgorithm	algorithm identifier
KeyOperationResult	The key operation result.
KeyOperationsParameters	The key operations parameters.
KeyVaultError	The key vault error exception.

Error

Object

The key vault server error.

Name	Type	Description
code	string	The error code.
innererror	Error	The key vault server error.
message	string	The error message.

JsonWebKeyEncryptionAlgorithm

Enumeration

algorithm identifier

Value	Description
RSA-OAEP
RSA-OAEP-256
RSA1_5
A128GCM
A192GCM
A256GCM
A128KW
A192KW
A256KW
A128CBC
A192CBC
A256CBC
A128CBCPAD
A192CBCPAD
A256CBCPAD

KeyOperationResult

Object

The key operation result.

Name	Type	Description
aad	string (base64url)
iv	string (base64url)
kid	string	Key identifier
tag	string (base64url)
value	string (base64url)

KeyOperationsParameters

Object

The key operations parameters.

Name	Type	Description
aad	string (base64url)	Additional data to authenticate but not encrypt/decrypt when using authenticated crypto algorithms.
alg	JsonWebKeyEncryptionAlgorithm minLength: 1	algorithm identifier
iv	string (base64url)	Cryptographically random, non-repeating initialization vector for symmetric algorithms.
tag	string (base64url)	The tag to authenticate when performing decryption with an authenticated algorithm.
value	string (base64url)

KeyVaultError

Object

The key vault error exception.

Name	Type	Description
error	Error	The key vault server error.