Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
The following specifies the format and field descriptions for the FFC DH Key structure.
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
2 |
|
|
|
|
|
|
|
|
|
3 |
|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0x44 |
0x48 |
0x50 |
0x42 |
||||||||||||||||||||||||||||
Key length |
|||||||||||||||||||||||||||||||
Field order (variable) |
|||||||||||||||||||||||||||||||
... |
|||||||||||||||||||||||||||||||
... |
|||||||||||||||||||||||||||||||
Generator (variable) |
|||||||||||||||||||||||||||||||
... |
|||||||||||||||||||||||||||||||
... |
|||||||||||||||||||||||||||||||
Public key (variable) |
|||||||||||||||||||||||||||||||
... |
|||||||||||||||||||||||||||||||
... |
Key length (4 bytes): A 32-bit unsigned integer. The value in this field MUST be equal to the length, in bytes, of the Public key field. This parameter is encoded using little-endian format.
Field order (variable): This is the large prime field order, and is a domain parameter for the FFC DH algorithm ([SP800-56A] section 5.7.1). This field parameter is referred to as p in [SP800-56A] section 3.2. It MUST be encoded in big-endian format. The length of this field, in bytes, MUST be equal to the value in the Key length field.
Generator (variable): The generator of the subgroup, a domain parameter for the FFC DH algorithm ([SP800-56A] section 5.7.1). This field parameter is referred to as g in [SP800-56A] section 3.2. It MUST be encoded in big-endian format. The length of this field, in bytes, MUST be equal to the value in the Key length field.
Public key (variable): The public key for the FFC DH algorithm ([SP800-56A] section 5.7.1). This field parameter is referred to as y in [SP800-56A] section 3.2. It MUST be encoded in big-endian format. The length of this field, in bytes, MUST be equal to the value of the Key length field.