-- Module H235-SECURITY-MESSAGES (H.235:08/2003)
-- See also ITU-T H.235 (08/2003)
-- See also the index of all ASN.1 assignments needed in this document
H235-SECURITY-MESSAGES DEFINITIONS AUTOMATIC TAGS ::=
BEGIN
-- EXPORTS All
ChallengeString ::= OCTET STRING(SIZE (8..128))
TimeStamp ::= INTEGER(1..4294967295) -- seconds since 00:00 1/1/1970 UTC
RandomVal ::= INTEGER -- 32-bit Integer
Password ::= BMPString(SIZE (1..128))
Identifier ::= BMPString(SIZE (1..128))
KeyMaterial ::= BIT STRING(SIZE (1..2048))
NonStandardParameter ::= SEQUENCE {
nonStandardIdentifier OBJECT IDENTIFIER,
data OCTET STRING
}
-- if local octet representations of these bit strings are used they shall
-- utilize standard Network Octet ordering (e.g. Big Endian)
DHset ::= SEQUENCE {
halfkey BIT STRING(SIZE (0..2048)), -- = g^x mod n
modSize BIT STRING(SIZE (0..2048)), -- n
generator BIT STRING(SIZE (0..2048)), -- g
...
}
ECpoint ::=
SEQUENCE -- uncompressed (x, y) affine coordinate representation of an elliptic curve point
{
x BIT STRING(SIZE (0..511)) OPTIONAL,
y BIT STRING(SIZE (0..511)) OPTIONAL,
...
}
ECKASDH ::=
CHOICE -- parameters for elliptic curve key agreement scheme Diffie-Hellman
{
eckasdhp
SEQUENCE-- parameters for elliptic curves of prime field-- {public-key
ECpoint, -- This field contains representation of the ECKAS-DHp public key value.--
--This field contains the initiator's ECKAS-DHp public key value (aP) when this information
-- element is sent from originator to receiver. This field contains the responder's ECKAS-DHp
-- public key value (bP) when this information element is sent back from receiver
-- to originator.
modulus
BIT STRING
(SIZE (0..
511)), -- This field contains representation of the--
-- ECKAS-DHp public modulus value (p).
base
ECpoint, -- This field contains representation of the ECKAS-DHp public base (P).--
weierstrassA
BIT STRING
(SIZE (0..
511)), --This field contains representation of the--
-- ECKAS-DHp Weierstrass coefficient (a).
weierstrassB
BIT STRING
(SIZE (0..
511))--This field contains representation of the--
-- ECKAS-DHp Weierstrass coefficient (b).
},
eckasdh2
SEQUENCE-- parameters for elliptic curves of characteristic 2 -- {public-key
ECpoint, -- This field contains representation of the ECKAS-DH2 public key value. --
-- This field contains the initiator's ECKAS-DH2 public key value (aP) when this information
-- element is sent from originator to receiver. This field contains the responder's ECKAS-DH2
-- public key value (bP) when this information element is sent back from receiver to originator.
fieldSize
BIT STRING
(SIZE (0..
511)), -- This field contains representation of the--
-- ECKAS-DH2 field size value (m).
base
ECpoint, -- This field contains representation of the ECKAS-DH2 public base (P).--
weierstrassA
BIT STRING
(SIZE (0..
511)), --This field contains representation of the--
-- ECKAS-DH2 Weierstrass coefficient (a).
weierstrassB
BIT STRING
(SIZE (0..
511))--This field contains representation of the--
-- ECKAS-DH2 Weierstrass coefficient (b).
},
...
}
ECGDSASignature ::=
SEQUENCE -- parameters for elliptic curve digital signature algorithm
{
r BIT STRING(SIZE (0..511)), -- This field contains the representation of the r component of the
-- ECGDSA digital signature.
s
BIT STRING
(SIZE (0..511))-- This field contains the representation of the s component of the--
-- ECGDSA digital signature.
}
TypedCertificate ::= SEQUENCE {
type OBJECT IDENTIFIER,
certificate OCTET STRING,
...
}
AuthenticationBES ::= CHOICE {
default NULL, -- encrypted ClearToken
radius NULL, -- RADIUS-challenge/response
...
}
AuthenticationMechanism ::= CHOICE {
dhExch NULL, -- Diffie-Hellman
pwdSymEnc NULL, -- password with symmetric encryption
pwdHash NULL, -- password with hashing
certSign NULL, -- Certificate with signature
ipsec NULL, -- IPSEC based connection
tls NULL,
nonStandard NonStandardParameter, -- something else.
...,
authenticationBES AuthenticationBES -- user authentication for BES
}
ClearToken ::= SEQUENCE -- a "token" may contain multiple value types.
{
tokenOID OBJECT IDENTIFIER,
timeStamp TimeStamp OPTIONAL,
password Password OPTIONAL,
dhkey DHset OPTIONAL,
challenge ChallengeString OPTIONAL,
random RandomVal OPTIONAL,
certificate TypedCertificate OPTIONAL,
generalID Identifier OPTIONAL,
nonStandard NonStandardParameter OPTIONAL,
...,
eckasdhkey ECKASDH OPTIONAL, -- elliptic curve Key Agreement Scheme-Diffie
-- Hellman Analogue (ECKAS-DH)
sendersID Identifier OPTIONAL,
h235Key H235Key OPTIONAL -- central distributed key in V3
}
-- An object identifier should be placed in the tokenOID field when a
-- ClearToken is included directly in a message (as opposed to being
-- encrypted). In all other cases, an application should use the
-- object identifier { 0 0 } to indicate that the tokenOID value is not present.
--
-- Start all the cryptographic parameterized types here...
--
SIGNED{ToBeSigned} ::= SEQUENCE {
toBeSigned ToBeSigned,
algorithmOID OBJECT IDENTIFIER,
paramS Params, -- any "runtime" parameters
signature BIT STRING -- could be an RSA or an ASN.1 coded ECGDSASignature
}(CONSTRAINED BY { -- Verify or Sign Certificate --})
ENCRYPTED{ToBeEncrypted} ::= SEQUENCE {
algorithmOID OBJECT IDENTIFIER,
paramS Params, -- any "runtime" parameters
encryptedData OCTET STRING
}(CONSTRAINED BY { -- Encrypt or Decrypt --ToBeEncrypted})
HASHED{ToBeHashed} ::= SEQUENCE {
algorithmOID OBJECT IDENTIFIER,
paramS Params, -- any "runtime" parameters
hash BIT STRING
}(CONSTRAINED BY { -- Hash --ToBeHashed})
IV8 ::= OCTET STRING(SIZE (8)) -- initial value for 64-bit block ciphers
IV16 ::= OCTET STRING(SIZE (16)) -- initial value for 128-bit block ciphers
-- signing algorithm used must select one of these types of parameters
-- needed by receiving end of signature.
Params ::= SEQUENCE {
ranInt INTEGER OPTIONAL, -- some integer value
iv8 IV8 OPTIONAL, -- 8 octet initialization vector
...,
iv16 IV16 OPTIONAL, -- 16 octet initialization vector
iv OCTET STRING OPTIONAL, -- arbitrary length initialization vector
clearSalt OCTET STRING OPTIONAL -- unencrypted salting key for encryption
}
EncodedGeneralToken ::=
TYPE-IDENTIFIER.&Type(ClearToken -- general usage token --)
PwdCertToken ::=
ClearToken(WITH COMPONENTS {
...,
timeStamp PRESENT,
generalID PRESENT
})
EncodedPwdCertToken ::= TYPE-IDENTIFIER.&Type(PwdCertToken)
CryptoToken ::= CHOICE {
cryptoEncryptedToken
SEQUENCE-- General purpose/application specific token-- {tokenOID
OBJECT
IDENTIFIER,
token
ENCRYPTED
{EncodedGeneralToken}
},
cryptoSignedToken
SEQUENCE-- General purpose/application specific token-- {tokenOID
OBJECT
IDENTIFIER,
token
SIGNED
{EncodedGeneralToken}
},
cryptoHashedToken
SEQUENCE-- General purpose/application specific token-- {tokenOID
OBJECT
IDENTIFIER,
hashedVals
ClearToken,
token
HASHED
{EncodedGeneralToken}
},
cryptoPwdEncr ENCRYPTED{EncodedPwdCertToken},
...
}
-- These allow the passing of session keys within the H.245 OLC structure.
-- They are encoded as standalone ASN.1 and based as an OCTET STRING within H.245
H235Key ::=
CHOICE -- this is used with the H.245 or ClearToken "h235Key" field
{
secureChannel KeyMaterial,
sharedSecret ENCRYPTED{EncodedKeySyncMaterial},
certProtectedKey SIGNED{EncodedKeySignedMaterial},
...,
secureSharedSecret V3KeySyncMaterial -- for H.235 V3 end points
}
KeySignedMaterial ::= SEQUENCE {
generalId Identifier, -- slave's alias
mrandom RandomVal, -- master's random value
srandom RandomVal OPTIONAL, -- slave's random value
timeStamp TimeStamp OPTIONAL, -- master's timestamp for unsolicited EU
encrptval ENCRYPTED{EncodedKeySyncMaterial}
}
EncodedKeySignedMaterial ::= TYPE-IDENTIFIER.&Type(KeySignedMaterial)
H235CertificateSignature ::= SEQUENCE {
certificate TypedCertificate,
responseRandom RandomVal,
requesterRandom RandomVal OPTIONAL,
signature SIGNED{EncodedReturnSig},
...
}
ReturnSig ::= SEQUENCE {
generalId Identifier, -- slave's alias
responseRandom RandomVal,
requestRandom RandomVal OPTIONAL,
certificate TypedCertificate OPTIONAL -- requested certificate
}
EncodedReturnSig ::= TYPE-IDENTIFIER.&Type(ReturnSig)
KeySyncMaterial ::= SEQUENCE {
generalID Identifier,
keyMaterial KeyMaterial,
...
}
EncodedKeySyncMaterial ::= TYPE-IDENTIFIER.&Type(KeySyncMaterial)
V3KeySyncMaterial ::= SEQUENCE {
generalID Identifier OPTIONAL, -- peer terminal ID
algorithmOID OBJECT IDENTIFIER OPTIONAL, -- encryption algorithm
paramS Params, -- IV
encryptedSessionKey OCTET STRING OPTIONAL, -- encrypted session key
encryptedSaltingKey OCTET STRING OPTIONAL, -- encrypted media salting key
clearSaltingKey OCTET STRING OPTIONAL, -- unencrypted media salting key
paramSsalt Params OPTIONAL, -- IV (and clear salt) for salting key encryption
keyDerivationOID OBJECT IDENTIFIER OPTIONAL, -- key derivation method
...
}
END -- End of H235-SECURITY-MESSAGES DEFINITIONS
-- Generated by Asnp, the ASN.1 pretty-printer of France Telecom R&D