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createDecipheriv - node__crypto.d.ts - Node documentation
function createDecipheriv

Usage in Deno

```typescript import { createDecipheriv } from "node:node__crypto.d.ts"; ```
createDecipheriv(
algorithm: CipherCCMTypes,
key: CipherKey,
): DecipherCCM
Creates and returns a `Decipher` object that uses the given `algorithm`, `key` and initialization vector (`iv`). The `options` argument controls stream behavior and is optional except when a cipher in CCM or OCB mode (e.g. `'aes-128-ccm'`) is used. In that case, the `authTagLength` option is required and specifies the length of the authentication tag in bytes, see `CCM mode`. In GCM mode, the `authTagLength` option is not required but can be used to restrict accepted authentication tags to those with the specified length. For `chacha20-poly1305`, the `authTagLength` option defaults to 16 bytes. The `algorithm` is dependent on OpenSSL, examples are `'aes192'`, etc. On recent OpenSSL releases, `openssl list -cipher-algorithms` will display the available cipher algorithms. The `key` is the raw key used by the `algorithm` and `iv` is an [initialization vector](https://en.wikipedia.org/wiki/Initialization_vector). Both arguments must be `'utf8'` encoded strings,`Buffers`, `TypedArray`, or `DataView`s. The `key` may optionally be a `KeyObject` of type `secret`. If the cipher does not need an initialization vector, `iv` may be `null`. When passing strings for `key` or `iv`, please consider `caveats when using strings as inputs to cryptographic APIs`. Initialization vectors should be unpredictable and unique; ideally, they will be cryptographically random. They do not have to be secret: IVs are typically just added to ciphertext messages unencrypted. It may sound contradictory that something has to be unpredictable and unique, but does not have to be secret; remember that an attacker must not be able to predict ahead of time what a given IV will be.

Parameters

algorithm: CipherCCMTypes
`stream.transform` options

Return Type

createDecipheriv(
algorithm: CipherOCBTypes,
key: CipherKey,
): DecipherOCB

Parameters

Return Type

createDecipheriv(
algorithm: CipherGCMTypes,
key: CipherKey,
options?: CipherGCMOptions,
): DecipherGCM

Parameters

algorithm: CipherGCMTypes
optional
options: CipherGCMOptions

Return Type

createDecipheriv(
algorithm: string,
key: CipherKey,
iv: BinaryLike | null,
options?: stream.TransformOptions,
): Decipher

Parameters

algorithm: string
iv: BinaryLike | null
optional
options: stream.TransformOptions

Return Type