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require('uxp').storage.secureStorage

SecureStorage provides a protected storage which can be used to store sensitive data per plugin. SecureStorage takes a key-value pair and encrypts the value before being stored. After encryption, it stores the key and the encrypted value pair. When the value is requested with an associated key, it's retrieved after being decrypted. Please note that the key is not encrypted thus it's not protected by the cryptographic operation.

Caveats for SecureStorage are as follows:

  1. SecureStorage is not an appropriate storage for sensitive data which wants to keep secret from the current user. SecureStorage is protected under the current user's account credential. It means the encrypted data can be at risk of being decrypted with the current user's privilege.
  2. Data in SecureStorage can be lost for various reasons. For an example, the user could uninstall the host application and delete the secure storage. Or, the cryptographic information used by the secure storage could be damaged by the user accidentally, and it will result in loss of data without the secure storage being removed. SecureStorage should be regarded as a cache rather than a persistent storage. Data in SecureStorage should be able to be regenerated from plugins after the time of loss.

length ⇒ int

Read only Returns number of items stored in the secure storage.

Returns: int - returns the number of items

setItem(key, value)

Store a key and value pair after the value is encrypted in a secure storage

Returns: Promise<void> - : resolved when the value is stored. rejected when the value is empty or not stored.
Throws:

  • TypeError : thrown when either key or value doesn't have one of acceptable types.
ParamTypeDescription
key
string
: a key to set value
value
string | ArrayBuffer | TypedArray
: a value for a key.

getItem(key)

Retrieve a value associated with a provided key after the value is being decrypted from a secure storage.

Returns: Promise<Uint8Array> - : a value as buffer
Throws:

  • TypeError : thrown when a key doesn't have an acceptable type.
ParamTypeDescription
key
string
: a key to get value

removeItem(key)

Remove a value associated with a provided key

Returns: Promise<void> - : resolved when the value associated with the key is removed. rejected when the value is neither removed nor found.
Throws:

  • TypeError : thrown when a key doesn't have an acceptable type.
ParamTypeDescription
key
string
: a key to remove value

key()

Returns a key which is stored at the given index

Returns: int - Returns the key which is stored at the given index.

ParamType
index.
number

clear()

Clear all values in a secure storage.

Returns: Promise<void> - : resolved when all the items are cleared. rejected when there is no item to clear or clear failed.

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