2.2.2.9.2 BCRYPT RSA Private Key BLOB
The following is the diagram of elements in the RSA private key BLOB that MUST be passed to the CA.
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2 |
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Magic |
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BitLength |
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PubExpLength |
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ModulusLength |
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PLength |
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QLength |
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PubExp (variable) |
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... |
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Modulus (variable) |
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P (variable) |
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Q (variable) |
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Magic (4 bytes): Length MUST be 4 bytes.
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This field MUST be present as an unsigned long in big-endian format.
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The value of this field MUST be 0x32415352 (RSA2).
BitLength (4 bytes): Length MUST be 4 bytes.
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This field MUST be present as an unsigned long in big-endian format.
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The value of this field is the size, in bits, of the RSA key.
PubExpLength (4 bytes): Length MUST be 4 bytes.
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This field MUST be present as an unsigned long in big-endian format.
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The value of this field is the size, in bytes, of the RSA key exponent.
ModulusLength (4 bytes): Length MUST be 4 bytes.
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The field MUST be present as an unsigned long in big-endian format.
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The value of this field is the size, in bytes, of the modulus of the key.
PLength (4 bytes): Length MUST be 4 bytes.
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This field MUST be present as an unsigned long in big-endian format.
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The value of this field is the size, in bytes, of the first prime number of the private key.
QLength (4 bytes): Length MUST be 4 bytes.
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This field MUST be present as an unsigned long in big-endian format.
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The value of this field is the size, in bytes, of the second prime number of the private key.
PubExp (variable): The exponent of the key with a length defined by PubExpLength.
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This field MUST be present as a byte string in big-endian format.
Modulus (variable): The modulus of the key with a length defined by ModulusLength.
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This field MUST be present as a byte string in big-endian format.
P (variable): The first prime number of the private key with a length defined by PLength.
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This field MUST be present as a byte string in big-endian format.
Q (variable): The second prime number of the private key with a length defined by QLength.
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This field MUST be present as a byte string in big-endian format.