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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* message_digest.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <me@cacharle.xyz> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/08/01 15:03:39 by charles #+# #+# */
/* Updated: 2020/08/03 12:56:52 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_ssl.h"
char *message_digest(t_message_digest_param *param, uint8_t *message_origin, uint64_t size)
{
size_t i;
uint64_t padding_size;
uint8_t *message;
void *local_state;
char *ret;
local_state = ft_memdup(param->compression_state_init, param->compression_state_size);
if (local_state == NULL)
return (NULL);
padding_size = (param->chunk_size - (size + sizeof(uint64_t)) % param->chunk_size) + sizeof(uint64_t);
if ((message = malloc(size + padding_size)) == NULL)
{
free(local_state);
return (NULL);
}
ft_memcpy(message, message_origin, size);
ft_memset(message + size, 0x0, padding_size);
message[size] |= 1 << 7;
*((uint64_t*)(message + size + padding_size - sizeof(uint64_t))) =
param->big_endian ? reverse_bytes64(size * 8) : (size * 8);
size += padding_size;
for (size_t j = 0; j < size; j++)
{
if (j % 8 == 0)
printf("\n");
printf("%02x ", message[j]);
}
printf("\n");
i = 0;
while (i < size)
{
local_state = param->compression_func(local_state, message + i);
if (local_state == NULL)
{
free(message);
free(local_state);
return (NULL);
}
i += param->chunk_size;
}
free(message);
if (param->big_endian)
{
for (i = 0; i < param->compression_state_size / param->compression_state_stride; i++)
((uint32_t*)local_state)[i] =
param->compression_state_stride == sizeof(uint32_t)
? reverse_bytes32(((uint32_t*)local_state)[i])
: reverse_bytes64(((uint64_t*)local_state)[i]);
}
ret = bytes_to_str(local_state, param->compression_state_size);
free(local_state);
return (ret);
}
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