The BCRYPT_DSA_KEY_BLOB_V2 structure is used as a header for a Digital Signature Algorithm (DSA) public key or private keyBLOB in memory.
typedef struct _BCRYPT_DSA_KEY_BLOB_V2 {
ULONG dwMagic;
ULONG cbKey;
HASHALGORITHM_ENUM hashAlgorithm;
DSAFIPSVERSION_ENUM standardVersion;
ULONG cbSeedLength;
ULONG cbGroupSize;
UCHAR Count[4];
} BCRYPT_DSA_KEY_BLOB_V2, *PBCRYPT_DSA_KEY_BLOB_V2;
dwMagic
Determines the type of key this structure represents. This can be one of the following values.
cbKey
The length, in bytes, of the key.
hashAlgorithm
A HASHALGORITHM_ENUM enumeration value that specifies the hashing algorithm to use.
standardVersion
A DSAFIPSVERSION_ENUM enumeration value that specifies the Federal Information Processing Standard(FIPS) to apply.
cbSeedLength
Length of the seed used to generate the prime number q.
cbGroupSize
Size of the prime number q . Currently, if the key is less than 128 bits, q is 20 bytes long. If the key exceeds 256 bits, q is 32 bytes long.
Count
The number of iterations performed to generate the prime number q from the seed. For more information, see NIST standard FIPS186-3.
The structure applies to DSA keys that exceed 1024 bits in length but are less than or equal to 3072 bits.
This structure is used as a header for a larger buffer. A DSA public key BLOB (BCRYPT_DSA_PUBLIC_BLOB) has the following format in contiguous memory. The Modulus, Generator, and Public numbers are in big-endian format.
BCRYPT_DSA_KEY_BLOB_V2
Modulus[cbKey] // Big-endian.
Generator[cbKey] // Big-endian.
Public[cbKey] // Big-endian.
A DSA private key BLOB (BCRYPT_DSA_PRIVATE_BLOB) has the following format in contiguous memory. The Modulus, Generator, Public, and PrivateExponent numbers are in big-endian format.
BCRYPT_DSA_KEY_BLOB_V2
Modulus[cbKey] // Big-endian.
Generator[cbKey] // Big-endian.
Public[cbKey] // Big-endian.
PrivateExponent[20] // Big-endian.
Header: Declared in bcrypt.h.
Library: Use bcrypt.lib.