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The following specifies the format and field descriptions for the key derivation function (KDF) parameters structure.
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1 |
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2 |
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3 |
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0x00 |
0x00 |
0x00 |
0x00 |
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0x01 |
0x00 |
0x00 |
0x00 |
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Length of hash name |
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0x00 |
0x00 |
0x00 |
0x00 |
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Hash algorithm name (variable) |
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... |
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... |
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Length of hash name (4 bytes): A 32-bit unsigned integer. This field MUST be the length, in bytes, of the Hash algorithm name field. This field is encoded using little-endian format.
Hash algorithm name (variable): A null-terminated Unicode string containing the name of the hash algorithm to be used with the default KDF [SP800-108]. Valid values for this field are as follows.
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Value
Meaning
L"SHA256"
The SHA-256 algorithm, as specified in [FIPS180-3].
L"SHA384"
The SHA-384 algorithm, as specified in [FIPS180-3].
L"SHA512"
The SHA-512 algorithm, as specified in [FIPS180-3].
L"SHA1"
The SHA-1 algorithm, as specified in [FIPS180-3].