md5.h

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#ifndef _IPXE_MD5_H
#define _IPXE_MD5_H

/** @file
 *
 * MD5 algorithm
 *
 */

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
FILE_SECBOOT ( PERMITTED );

#include <stdint.h>
#include <ipxe/crypto.h>

/** An MD5 digest */
struct md5_digest {
        /** Hash output */
        uint32_t h[4];
};

/** An MD5 data block */
union md5_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;
};

/** MD5 digest and data block
 *
 * The order of fields within this structure is designed to minimise
 * code size.
 */
struct md5_digest_data {
        /** Digest of data already processed */
        struct md5_digest digest;
        /** Accumulated data */
        union md5_block data;
} __attribute__ (( packed ));

/** MD5 digest and data block */
union md5_digest_data_dwords {
        /** Digest and data block */
        struct md5_digest_data dd;
        /** Raw dwords */
        uint32_t dword[ sizeof ( struct md5_digest_data ) /
                        sizeof ( uint32_t ) ];
};

/** An MD5 context */
struct md5_context {
        /** Amount of accumulated data */
        size_t len;
        /** Digest and accumulated data */
        union md5_digest_data_dwords ddd;
} __attribute__ (( packed ));

/** MD5 context size */
#define MD5_CTX_SIZE sizeof ( struct md5_context )

/** MD5 block size */
#define MD5_BLOCK_SIZE sizeof ( union md5_block )

/** MD5 digest size */
#define MD5_DIGEST_SIZE sizeof ( struct md5_digest )

extern struct digest_algorithm md5_algorithm;

#endif /* _IPXE_MD5_H */