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#ifndef _IPXE_SHA256_H
#define _IPXE_SHA256_H
/** @file
*
* SHA-256 algorithm
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <ipxe/crypto.h>
/** An SHA-256 digest */
struct sha256_digest {
/** Hash output */
uint32_t h[8];
};
/** An SHA-256 data block */
union sha256_block {
/** Raw bytes */
uint8_t byte[64];
/** Raw dwords */
uint32_t dword[16];
/** Final block structure */
struct {
/** Padding */
uint8_t pad[56];
/** Length in bits */
uint64_t len;
} final;
};
/** SHA-256 digest and data block
*
* The order of fields within this structure is designed to minimise
* code size.
*/
struct sha256_digest_data {
/** Digest of data already processed */
struct sha256_digest digest;
/** Accumulated data */
union sha256_block data;
} __attribute__ (( packed ));
/** SHA-256 digest and data block */
union sha256_digest_data_dwords {
/** Digest and data block */
struct sha256_digest_data dd;
/** Raw dwords */
uint32_t dword[ sizeof ( struct sha256_digest_data ) /
sizeof ( uint32_t ) ];
};
/** An SHA-256 context */
struct sha256_context {
/** Amount of accumulated data */
size_t len;
/** Digest and accumulated data */
union sha256_digest_data_dwords ddd;
} __attribute__ (( packed ));
/** SHA-256 context size */
#define SHA256_CTX_SIZE sizeof ( struct sha256_context )
/** SHA-256 digest size */
#define SHA256_DIGEST_SIZE sizeof ( struct sha256_digest )
extern struct digest_algorithm sha256_algorithm;
#endif /* _IPXE_SHA256_H */
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