alfresco-ng2-components/docs/core/services/jwt-helper.service.md
Maurizio Vitale 1fa81962a0
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Co-authored-by: Mikolaj Serwicki <mikolaj.serwicki@hyland.com>
Co-authored-by: Tomasz <tomasz.gnyp@hyland.com>
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Markdown

---
Title: JWT helper service
Added: v3.0.0
Status: Active
Last reviewed: 2019-01-09
---
# [JWT helper service](lib/core/src/lib/services/jwt-helper.service.ts "Defined in jwt-helper.service.ts")
Decodes a JSON Web Token (JWT) to a JavaScript object.
## Class members
### Methods
- **decodeToken**(token: `any`): `any`<br/>
Decodes a JSON web token into a JS object.
- _token:_ `any` - Token in encoded form
- **Returns** `any` - Decoded token data object
- **getAccessToken**(): `string`<br/>
Gets access token
- **Returns** `string` - access token
- **getClientRoles**(clientName: `string`): `string[]`<br/>
Gets Client roles.
- _clientName:_ `string` -
- **Returns** `string[]` - Array of client roles
- **getIdToken**(): `string`<br/>
Gets id token
- **Returns** `string` - id token
- **getRealmRoles**(): `string[]`<br/>
Gets realm roles.
- **Returns** `string[]` - Array of realm roles
- **getValueFromLocalAccessToken**(key: `string`)<br/>
Gets a named value from the user access token.
- _key:_ `string` - Key name of the field to retrieve
- **getValueFromLocalIdToken**(key: `string`)<br/>
Gets a named value from the user id token.
- _key:_ `string` - Key name of the field to retrieve
- **getValueFromLocalToken**(key: `string`)<br/>
Gets a named value from the user access or id token.
- _key:_ `string` - Key name of the field to retrieve
- **getValueFromToken**(token: `string`, key: `string`)<br/>
Gets a named value from the user access token.
- _token:_ `string` -
- _key:_ `string` - Key name of the field to retrieve
- **hasClientRole**(clientName: `string`, role: `string`): `boolean`<br/>
Checks for client role.
- _clientName:_ `string` - Targeted client name
- _role:_ `string` - Role name to check
- **Returns** `boolean` - True if it contains given role, false otherwise
- **hasRealmRole**(role: `string`): `boolean`<br/>
Checks for single realm role.
- _role:_ `string` - Role name to check
- **Returns** `boolean` - True if it contains given role, false otherwise
- **hasRealmRoles**(rolesToCheck: `string[]`): `boolean`<br/>
Checks for realm roles.
- _rolesToCheck:_ `string[]` - List of role names to check
- **Returns** `boolean` - True if it contains at least one of the given roles, false otherwise
- **hasRealmRolesForClientRole**(clientName: `string`, rolesToCheck: `string[]`): `boolean`<br/>
Checks for client roles.
- _clientName:_ `string` - Targeted client name
- _rolesToCheck:_ `string[]` - List of role names to check
- **Returns** `boolean` - True if it contains at least one of the given roles, false otherwise
## Details
JWT is a standard for sending data securely that ADF uses during the
OAuth2 authentication procedure. See the [JWT website](https://jwt.io/)
for full details of the standard and its uses.
## See also
- [Identity user service](identity-user.service.md)