BCRYPT_KEY_LENGTHS_STRUCT Structure

The BCRYPT_KEY_LENGTHS_STRUCT structure defines the range of key sizes that are supported by the provider. This structure is used with the BCRYPT_KEY_LENGTHS property.

This structure is also used with the BCRYPT_AUTH_TAG_LENGTH property to contain the minimum, maximum, and increment size of an authentication tag.

Syntax

typedef struct __BCRYPT_KEY_LENGTHS_STRUCT {
    ULONG dwMinLength;
    ULONG dwMaxLength;
    ULONG dwIncrement;
} BCRYPT_KEY_LENGTHS_STRUCT;  

Members

dwMinLength
The minimum length, in bytes, of a key.

dwMaxLength
The maximum length, in bytes, of a key.

dwIncrement
The number of bytes that the key size can be incremented between dwMinLength and dwMaxLength.

Remarks

The key sizes are given in a range that is inclusive of the minimum and maximum values and are separated by the increment. For example, if the minimum key size is 8 bytes, the maximum key size is 16 bytes, and the increment is 2 bytes, the provider would support key sizes of 8, 10, 12, 14, and 16 bytes.

Requirements

Header: Declared in bcrypt.h.

Library: Use bcrypt.lib.