Quelle  cryptohash.h

/*-------------------------------------------------------------------------
 *
 * cryptohash.h
 *   Generic headers for cryptographic hash functions.
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * IDENTIFICATION
 *    src/include/common/cryptohash.h
 *
 *-------------------------------------------------------------------------
 */

#ifndef PG_CRYPTOHASH_H
#define PG_CRYPTOHASH_H

/* Context Structures for each hash function */
typedef enum
{
 PG_MD5 = 0,
 PG_SHA1,
 PG_SHA224,
 PG_SHA256,
 PG_SHA384,
 PG_SHA512,
} pg_cryptohash_type;

/* opaque context, private to each cryptohash implementation */
typedef struct pg_cryptohash_ctx pg_cryptohash_ctx;

extern pg_cryptohash_ctx *pg_cryptohash_create(pg_cryptohash_type type);
extern int pg_cryptohash_init(pg_cryptohash_ctx *ctx);
extern int pg_cryptohash_update(pg_cryptohash_ctx *ctx, const uint8 *data, size_t len);
extern int pg_cryptohash_final(pg_cryptohash_ctx *ctx, uint8 *dest, size_t len);
extern void pg_cryptohash_free(pg_cryptohash_ctx *ctx);
extern const char *pg_cryptohash_error(pg_cryptohash_ctx *ctx);

#endif       /* PG_CRYPTOHASH_H */