class final Core · roukmoute/pdf 0.6.2
PDF\Specification\Dictionary\AdditionalCryptFilterDictionaryEntriesForPublicKeySecurityHandlersTable27\RecipientsEntryTable 27, /Recipients; PDF type: array or string; Required.Inheritance and contracts
Parent : PDF\Specification\SchemaEntry
Definition in the specification
Table 27 · Additional crypt filter dictionary entries for public-key security handlers
ISO 32000-1:2008, §7.6.5 · PDF page 77 ↗
/Recipients array or string
(Required) If the crypt filter is referenced from StmF or StrF in the encryption dictionary, this entry shall be an array of byte strings, where each string shall be a binary-encoded PKCS#7 object that shall list recipients that have been granted equal access rights to the document. The enveloped data contained in the PKCS#7 object shall include both a 20-byte seed value that shall be used to compute the encryption key (see 7.6.4.3, "Public-Key Encryption Algorithms") followed by 4 bytes of permissions settings (see Table 22) that shall apply to the recipient list. There shall be only one object per unique set of access permissions. If a recipient appears in more than one list, the permissions used shall be those in the first matching list. If the crypt filter is referenced from a Crypt filter decode parameter dictionary (see Table 14), this entry shall be a string that shall be a binary-encoded PKCS#7 object shall contain a list of all recipients who are permitted to access the corresponding encrypted stream. The enveloped data contained in the PKCS#7 object shall be a 20-byte seed value that shall be used to create the encryption key that shall be used by the algorithm in "Algorithm 1: Encryption of data using the RC4 or AES algorithms".
Qualifier: Required
Conditional descriptions remain traceable. A definition alone does not implement a codec, a signature or every format mechanism. Read the coverage.
Construction
__construct()
public function __construct(PDF\Syntax\Object\ArrayType|PDF\Syntax\Object\StringType|PDF\Syntax\Object\IndirectReference $value)Inherited methods
3 methods from parents and contracts
definition()
public function definition(): PDF\Specification\EntryDefinitionkey()
public function key(): PDF\Syntax\Object\NameTypevalue()
public function value(): PDF\Syntax\FileStructure\BasicTypeProperties
| Declaration | Origin and documentation |
|---|---|
public readonly PDF\Syntax\Object\NameType $key | PDF\Syntax\Object\DictionaryObject\Entry |
public readonly PDF\Syntax\FileStructure\BasicType $value | PDF\Syntax\Object\DictionaryObject\Entry |