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h235.asn
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2001-08-05
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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
...
}
ECKASDH::= CHOICE -- parameters for elliptic curve key agreement scheme Diffie-Hellman
{
eckasdhp SEQUENCE -- parameters for elliptic curves of prime field
{
public-key BIT STRING (SIZE(0..511)),
-- This field contains octet string representation of
-- the compressed ECKAS-DHp public key value. This field contains the initiator's compressed
-- ECKAS-DHp public key value (aP) when this information element is sent from originator to
-- receiver. This field contains the responder's compressed 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 octet string representation of
-- the ECKAS-DHp public modulus value (p).
base BIT STRING (SIZE(0..511)),
-- This field contains octet string representation of
-- the compressed ECKAS-DHp public base (P).
weierstrassA BIT STRING (SIZE(0..511)),
--This field contains octet string representation of
-- the ECKAS-DHp Weierstrass coefficient (a).
weierstrassB BIT STRING (SIZE(0..511))
--This field contains octet string representation of
-- the ECKAS-DHp Weierstrass coefficient (b).
},
eckasdh2 SEQUENCE -- parameters for elliptic curves of characteristic 2
{
public-key BIT STRING (SIZE(0..511)),
-- This field contains octet string representation of
-- the compressed ECKAS-DH2 public key value. This field contains the initiator's compressed
-- ECKAS-DH2 public key value (aP) when this information element is sent from originator to
-- receiver. This field contains the responder's compressed 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 octet string representation of
-- the ECKAS-DH2 field size value (m).
base BIT STRING (SIZE(0..511)),
-- This field contains octet string representation of
-- the compressed ECKAS-DH2 public base (P).
weierstrassA BIT STRING (SIZE(0..511)),
--This field contains octet string representation of
-- the ECKAS-DH2 Weierstrass coefficient (a).
weierstrassB BIT STRING (SIZE(0..511))
--This field contains octet string representation of
-- the ECKAS-DH2 Weierstrass coefficient (b).
},
...
}
ECDSAlikeSignature::= SEQUENCE -- parameters for elliptic curve digital signature algorithm
{
r BIT STRING (SIZE(0..511)),
-- This field contains the octet string representation of the
-- r component of the ECDSA-like digital signature.
s BIT STRING (SIZE(0..511))
-- This field contains the octet string representation of the
-- s component of the ECDSA-like 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, -- Diffe-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
}
-- 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 ECDSAlikeSignature
} ( 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
}
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 "h235Key" field
{
secureChannel KeyMaterial,
sharedSecret ENCRYPTED {EncodedKeySyncMaterial},
certProtectedKey SIGNED { EncodedKeySignedMaterial },
...
}
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)
END -- End of H235-SECURITY-MESSAGES DEFINITIONS