CYPHER_BLOCK - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTSAM_H

typedef struct _CYPHER_BLOCK
{
    CHAR data[CYPHER_BLOCK_LENGTH];
} CYPHER_BLOCK, *PCYPHER_BLOCK;

#endif

View code on GitHub

This structure is documented in Windows SDK.