/**
 * @file    myMd5.h
 * @brief   MD5 message digest (RFC 1321)
 * @details Computes 128-bit hash. Supports streaming update.
 */

#ifndef _MY_MD5_H_
#define _MY_MD5_H_
#include <stdint.h>

#ifdef __cplusplus
extern "C"
{
#endif

/**
 * @brief  MD5 context (state + count + pending buffer)
 */
typedef struct
{
	uint32_t      state[4];    /* A, B, C, D */
	uint32_t      count[2];    /* bit count low/high */
	unsigned char buf[64];     /* pending bytes */
} stru_md5_ctx;

/** Initialize context with magic constants */
void md5_start(stru_md5_ctx *ctx);

/** Feed data, callable multiple times */
void md5_update(stru_md5_ctx *ctx, const unsigned char *data, int len);

/** Finalize, get 16-byte digest */
void md5_final(stru_md5_ctx *ctx, unsigned char result[16]);

/** One-shot: compute MD5 of string, output 32-char hex (uppercase) */
void md5_string(const char *input, char output[33]);

#ifdef __cplusplus
}
#endif
#endif