BCRYPT_ECCKEY_BLOB structure (bcrypt.h)
The BCRYPT_ECCKEY_BLOB structure is used as a header for an elliptic curve public key or private key BLOB in memory.
typedef struct _BCRYPT_ECCKEY_BLOB {
ULONG dwMagic;
ULONG cbKey;
} BCRYPT_ECCKEY_BLOB, *PBCRYPT_ECCKEY_BLOB;
dwMagic
Specifies the type of key this BLOB represents. The possible values for this member depend on the type of BLOB this structure represents. The following keys use the NIST 256-bit prime curve defined in FIPS 186-2.
cbKey
The length, in bytes, of the key.
This structure is used as a header for a larger buffer. An elliptic curve public key BLOB (BCRYPT_ECCPUBLIC_BLOB) has the following format in contiguous memory. The X and Y coordinates are unsigned integers encoded in big-endian format.
BCRYPT_ECCKEY_BLOB
BYTE X[cbKey] // Big-endian.
BYTE Y[cbKey] // Big-endian.
An elliptic curve private key BLOB (BCRYPT_ECCPRIVATE_BLOB) has the following format in contiguous memory. The X and Y coordinates and d value are unsigned integers encoded in big-endian format.
BCRYPT_ECCKEY_BLOB
BYTE X[cbKey] // Big-endian.
BYTE Y[cbKey] // Big-endian.
BYTE d[cbKey] // Big-endian.
Requirement | Value |
---|---|
Minimum supported client | Windows Vista [desktop apps only] |
Minimum supported server | Windows Server 2008 [desktop apps only] |
Header | bcrypt.h |