CMS OID Constants

All OID constants in synta.cms are ObjectIdentifier instances (frozen, hashable).

Content-type OIDs (RFC 5652 §14)

Constant	OID	Name
`ID_DATA`	`1.2.840.113549.1.7.1`	id-data
`ID_SIGNED_DATA`	`1.2.840.113549.1.7.2`	id-signedData
`ID_ENVELOPED_DATA`	`1.2.840.113549.1.7.3`	id-envelopedData
`ID_DIGESTED_DATA`	`1.2.840.113549.1.7.5`	id-digestedData
`ID_ENCRYPTED_DATA`	`1.2.840.113549.1.7.6`	id-encryptedData
`ID_CT_AUTH_DATA`	`1.2.840.113549.1.9.16.1.2`	id-ct-authData

Content-encryption algorithm OIDs (RFC 3565)

Passed as algorithm_oid to EncryptedData.create; also returned by the content_encryption_algorithm_oid property.

Constant	OID	Key length
`ID_AES128_CBC`	`2.16.840.1.101.3.4.1.2`	16 bytes
`ID_AES192_CBC`	`2.16.840.1.101.3.4.1.22`	24 bytes
`ID_AES256_CBC`	`2.16.840.1.101.3.4.1.42`	32 bytes

Key-transport algorithm OIDs (RFC 8017)

Passed as key_wrap_oid to EnvelopedDataBuilder.

Constant	OID	Notes
`ID_RSAES_OAEP`	`1.2.840.113549.1.1.7`	RSA-OAEP with SHA-256 (recommended)
`ID_RSA_ENCRYPTION`	`1.2.840.113549.1.1.1`	RSA PKCS#1 v1.5 (legacy)

CMS-KEM OtherRecipientInfo OIDs (RFC 9629 §6.2)

Constant	OID	Description
`ID_ORI`	`1.2.840.113549.1.9.16.13`	Root arc for OtherRecipientInfo alternatives
`ID_ORI_KEM`	`1.2.840.113549.1.9.16.13.3`	Identifies a `KEMRecipientInfo`

Import

from synta.cms import (
    ID_DATA, ID_SIGNED_DATA, ID_ENVELOPED_DATA,
    ID_DIGESTED_DATA, ID_ENCRYPTED_DATA, ID_CT_AUTH_DATA,
    ID_AES128_CBC, ID_AES192_CBC, ID_AES256_CBC,
    ID_RSAES_OAEP, ID_RSA_ENCRYPTION,
    ID_ORI, ID_ORI_KEM,
)

ML-KEM OID constants (ID_ML_KEM_512, ID_ML_KEM_768, ID_ML_KEM_1024) are in synta.kem; see CMS-KEM.

See also Well-known OIDs for the full synta.oids catalog which includes the CMS content-type OIDs as CMS_DATA, CMS_SIGNED_DATA, etc.