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did/fmgp/fmgp.did/fmgp.did.comm

fmgp.did.comm

package fmgp.did.comm

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package fmgp.did.comm.extension
package fmgp.did.comm.protocol

Type members

Classlikes

object APU

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class Object
trait Matchable
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APU.type
object APV

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class Object
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APV.type
case class AnonHeaderBuilder(apv: APV, enc: ENCAlgorithm, alg: KWAlgorithm) extends ProtectedHeaderTMP

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case class AnonProtectedHeader(epk: PublicKey, apv: APV, typ: Option[MediaTypes], enc: ENCAlgorithm, alg: KWAlgorithm) extends ProtectedHeader

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object AnonProtectedHeader

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case class Attachment(id: Option[String], description: Option[String], filename: Option[String], media_type: Option[String], format: Option[String], lastmod_time: Option[String], data: AttachmentData, byte_count: Option[String])

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object Attachment

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sealed trait AttachmentData

A JSON object that gives access to the actual content of the attachment.

A JSON object that gives access to the actual content of the attachment.

This MUST contain at least one of the following subfields, and enough of them to allow access to the data:

Value parameters

base64

OPTIONAL. Base64url-encoded data, when representing arbitrary content inline instead of via links.

hash

OPTIONAL. The hash of the content encoded in multi-hash format. Used as an integrity check for the attachment, and MUST be used if the data is referenced via the links data attribute.

json

OPTIONAL. Directly embedded JSON data, when representing content inline instead of via links, and when the content is natively conveyable as JSON.

jws

OPTIONAL. A JWS in detached content mode, where the payload field of the JWS maps to base64 or to something fetchable via links. This allows attachments to be signed. The signature need not come from the author of the message.

links

OPTIONAL. A list of zero or more locations at which the content may be fetched. This allows content to be attached by reference instead of by value.

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object AttachmentData

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case class AttachmentDataAny(jws: Option[JWS_WithOutPayload], hash: Option[String], links: Option[Seq[String]], base64: Option[Base64], json: Option[Json]) extends AttachmentData

This class is not intended to be used. (Is just a fallback to be fully compatible with the specification)

This class is not intended to be used. (Is just a fallback to be fully compatible with the specification)

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object AttachmentDataAny

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case class AttachmentDataBase64(base64: Base64) extends AttachmentData

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object AttachmentDataBase64

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case class AttachmentDataJWS(jws: JWS_WithOutPayload, links: Option[Seq[String]]) extends AttachmentData

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object AttachmentDataJWS

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case class AttachmentDataJson(json: Json) extends AttachmentData

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object AttachmentDataJson

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case class AttachmentDataLinks(links: Seq[String], hash: Required[String]) extends AttachmentData

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object AttachmentDataLinks

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case class AuthHeaderBuilder(apv: APV, skid: VerificationMethodReferenced, apu: APU, enc: ENCAlgorithm, alg: KWAlgorithm) extends ProtectedHeaderTMP

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case class AuthProtectedHeader(epk: PublicKey, apv: APV, skid: VerificationMethodReferenced, apu: APU, typ: Option[MediaTypes], enc: ENCAlgorithm, alg: KWAlgorithm) extends ProtectedHeader

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object AuthProtectedHeader

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object CipherText

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CipherText.type
enum ContentEncryptionAlgorithms

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enum ENCAlgorithm

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object ENCAlgorithm

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trait EncryptedMessage extends Message

DIDComm messaging

DIDComm messaging

The encrypted form of a JWM is a JWE in General JSON Format.

DIDComm messaging support only a subset of the supported algorithms of JWAs

Types:

Content Encryption Algorithms: (with a AES 256-bit keys, or with an optional implementation using XC20P algorithm) https://identity.foundation/didcomm-messaging/spec/#curves-and-content-encryption-algorithms

  • X25519
  • P-384
  • P-256 (deprecated in favor of P-384)
  • P-521 (Optional)

JWE protected header enc MUST be one of:

  • A256CBC-HS512
  • A256GCM
  • XC20P (XChaCha20Poly1305 with a 256 bit key)

JWE protected header alg can be one of: https://identity.foundation/didcomm-messaging/spec/#key-wrapping-algorithms

  • ECDH-ES+A256KW (with P-256; P-384; P-521; X25519) for "anoncrypt" messages
  • ECDH-1PU+A256KW (with P-256; P-384; P-521; X25519) for "authcrypt" messages

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trait Message
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object EncryptedMessage

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case class EncryptedMessageGeneric(ciphertext: CipherText, `protected`: Base64Obj[ProtectedHeader], recipients: Seq[Recipient], tag: TAG, iv: IV) extends EncryptedMessage

TODO - To prevent invalid curve and weak point attacks, implementations that decrypt messages from a NIST curve MUST verify that the received public key (contained in the JWE protected header) is on the curve in question. This check may already be done by some JOSE libraries, but developers should not assume this is the case. See this explanation of the risk, and this practical guide for how to perform the verification correctly. https://neilmadden.blog/2017/05/17/so-how-do-you-validate-nist-ecdh-public-keys/

TODO - To prevent invalid curve and weak point attacks, implementations that decrypt messages from a NIST curve MUST verify that the received public key (contained in the JWE protected header) is on the curve in question. This check may already be done by some JOSE libraries, but developers should not assume this is the case. See this explanation of the risk, and this practical guide for how to perform the verification correctly. https://neilmadden.blog/2017/05/17/so-how-do-you-validate-nist-ecdh-public-keys/

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object EncryptedMessageGeneric

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object FROM

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object FROMTO

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class Object
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object IV

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object JSON_RFC7159

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case class JWMHeader(kid: String)

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object JWMHeader

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case class JWMSignatureObj(`protected`: JWM_PROTECTED, signature: JWM_SIGNATURE, header: Option[JWMHeader])

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object JWMSignatureObj

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enum KWAlgorithm

Key Wrapping Algorithms

Key Wrapping Algorithms

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object KWAlgorithm

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enum MediaTypes(val typ: String)

IANA Media Types

IANA Media Types

https://identity.foundation/didcomm-messaging/spec/#iana-media-types

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object MediaTypes

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sealed trait Message

DID Comm Message

DID Comm Message

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object Message

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object MsgID

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trait Operations

DID Comm operations

DID Comm operations

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object Operations

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Operations.type
object OperationsImp

TODO Fix all FIXME

TODO Fix all FIXME

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class OperationsImp(cryptoOperations: CryptoOperations) extends Operations

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sealed trait OutOfBand

OutOfBand make more type safe for OOB with SignedMessage or PlaintextMessage

OutOfBand make more type safe for OOB with SignedMessage or PlaintextMessage

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object OutOfBand

OOB - OutOfBand

OOB - OutOfBand

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case class OutOfBandPlaintext extends OutOfBand

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object OutOfBandPlaintext

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case class OutOfBandSigned extends OutOfBand

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object OutOfBandSigned

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object PIURI

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object Payload

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trait PlaintextMessage extends Message

https://identity.foundation/didcomm-messaging/spec/#message-headers

https://identity.foundation/didcomm-messaging/spec/#message-headers

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object PlaintextMessage

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case class PlaintextMessageClass(id: Required[MsgID], `type`: PIURI, to: Option[Set[TO]], from: Option[FROM], thid: Option[MsgID], created_time: Option[UTCEpoch], expires_time: Option[UTCEpoch], body: Option[JSON_RFC7159], attachments: Option[Seq[Attachment]], from_prior: Option[JWTToken], return_route: Option[ReturnRoute], accept-lang: Option[Seq[LanguageCodeIANA]], lang: Option[LanguageCodeIANA], l10n: Option[L10n], sender_order: Option[SenderOrder], sent_count: Option[SentCount], received_orders: Option[Seq[ReceivedOrdersElement]], typ: Option[String]) extends PlaintextMessage

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object PlaintextMessageClass

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enum Profiles(val name: String)

https://identity.foundation/didcomm-messaging/spec/#message-headers

https://identity.foundation/didcomm-messaging/spec/#message-headers

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sealed trait ProtectedHeader extends ProtectedHeaderTMP 
"epk": {"kty":"OKP","crv":"X25519","x":"JHjsmIRZAaB0zRG_wNXLV2rPggF00hdHbW5rj8g0I24"},
"apv":"NcsuAnrRfPK69A-rkZ0L9XWUG4jMvNC3Zg74BPz53PA",
"typ":"application/didcomm-encrypted+json",
"enc":"XC20P",
"alg":"ECDH-ES+A256KW"

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object ProtectedHeader

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sealed trait ProtectedHeaderTMP

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case class Recipient(encrypted_key: Base64, header: RecipientHeader)

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object Recipient

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case class RecipientHeader(kid: VerificationMethodReferenced)

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object RecipientHeader

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enum ReturnRoute

https://github.com/decentralized-identity/didcomm-messaging/blob/main/extensions/return_route/main.md

https://github.com/decentralized-identity/didcomm-messaging/blob/main/extensions/return_route/main.md

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object ReturnRoute

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case class SignedMessage(payload: Payload, signatures: Seq[JWMSignatureObj]) extends Message

SignedMessage is a JSON Web Message (JWM)

SignedMessage is a JSON Web Message (JWM)

JWM is a flexible way to encode application-level messages in JSON for transfer over a variety of transport protocols. JWMs use JSON Web Encryption (JWE) to protect integrity, achieve confidentiality, and achieve repudiable authentication; alternatively or in addition, they use JSON Web Signatures (JWS) to associate messages with a non-repudiable digital signature.

https://datatracker.ietf.org/doc/html/draft-looker-jwm-01

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object SignedMessage

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object TAG

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object TO

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Types

opaque type APU

APU is a Base64 url encode

APU is a Base64 url encode

Attributes

opaque type APV

APV is a Base64 url encode

APV is a Base64 url encode

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opaque type CipherText

CipherText is a Base64 url encode

CipherText is a Base64 url encode

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opaque type FROM

FROM is a DID URL with Path and Query parameter (that can be missing) (no-fragment)

FROM is a DID URL with Path and Query parameter (that can be missing) (no-fragment)

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Note

the class TO is just a copy of this class and replace FROM with TO

opaque type FROMTO
opaque type IV

InitializationVector is a Base64 url encode

InitializationVector is a Base64 url encode

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type JSON_RFC7159 = Obj
type JWM_PROTECTED = String
type JWM_SIGNATURE = String
type JWS_WithOutPayload = Json
type JWTToken = Json
opaque type MsgID

The Value is a short (<=32 bytes) string consisting entirely of unreserved URI characters.

The Value is a short (<=32 bytes) string consisting entirely of unreserved URI characters.

unreserved URI characters - https://datatracker.ietf.org/doc/html/rfc3986/#section-2.3:

  • Characters that are allowed in a URI but do not have a reserved purpose are called unreserved. These include uppercase and lowercase letters, decimal digits, hyphen, period, underscore, and tilde:
  • unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"

Attributes

opaque type PIURI
opaque type Payload
opaque type TAG

AuthenticationTag is a Base64 url encode

AuthenticationTag is a Base64 url encode

Attributes

opaque type TO

TO is a DID URL with Path and Query parameter (that can be missing) (no-fragment)

TO is a DID URL with Path and Query parameter (that can be missing) (no-fragment)

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Note

the class FROM is just a copy of this class and replace TO with FROM

type UTCEpoch = Long

Extensions

Extensions

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