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sha512.c
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/* ************************************************************************** */
/* */
/* :::::::: */
/* sha512.c :+: :+: */
/* +:+ */
/* By: pacovali <pacovali@student.codam.nl> +#+ */
/* +#+ */
/* Created: 2020/09/24 15:33:05 by pacovali #+# #+# */
/* Updated: 2020/10/11 15:29:28 by pacovali ######## odam.nl */
/* */
/* ************************************************************************** */
#include "message_digest.h"
uint64_t g_primes_sha512[] = {
0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f,
0xe9b5dba58189dbbc, 0x3956c25bf348b538, 0x59f111f1b605d019,
0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0xd807aa98a3030242,
0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2,
0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235,
0xc19bf174cf692694, 0xe49b69c19ef14ad2, 0xefbe4786384f25e3,
0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, 0x2de92c6f592b0275,
0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5,
0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f,
0xbf597fc7beef0ee4, 0xc6e00bf33da88fc2, 0xd5a79147930aa725,
0x06ca6351e003826f, 0x142929670a0e6e70, 0x27b70a8546d22ffc,
0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df,
0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6,
0x92722c851482353b, 0xa2bfe8a14cf10364, 0xa81a664bbc423001,
0xc24b8b70d0f89791, 0xc76c51a30654be30, 0xd192e819d6ef5218,
0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8,
0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99,
0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb,
0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc,
0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec,
0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915,
0xc67178f2e372532b, 0xca273eceea26619c, 0xd186b8c721c0c207,
0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, 0x06f067aa72176fba,
0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b,
0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc,
0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a,
0x5fcb6fab3ad6faec, 0x6c44198c4a475817
};
/**
@brief Main compression function for 64-bit version of SHA2 algorithm
@param temporary_hash temporary working array
@param message current message chunk casted to uint_64
@param cycle number of current cycle
@return zero on success
*/
static int compress512(uint64_t *temporary_hash, uint64_t *message, int cycle)
{
uint64_t s[2];
uint64_t tmp[2];
uint64_t ch;
uint64_t maj;
s[1] = ((temporary_hash[4] >> 14) | (temporary_hash[4] << (64 - 14))) ^
((temporary_hash[4] >> 18) | (temporary_hash[4] << (64 - 18))) ^
((temporary_hash[4] >> 41) | (temporary_hash[4] << (64 - 41)));
ch = (temporary_hash[4] & temporary_hash[5]) ^ ((~temporary_hash[4]) & temporary_hash[6]);
tmp[0] = temporary_hash[7] + s[1] + ch + g_primes_sha512[cycle] + message[cycle];
s[0] = ((temporary_hash[0] >> 28) | (temporary_hash[0] << (64 - 28))) ^
((temporary_hash[0] >> 34) | (temporary_hash[0] << (64 - 34))) ^
((temporary_hash[0] >> 39) | (temporary_hash[0] << (64 - 39)));
maj = (temporary_hash[0] & temporary_hash[1]) ^ (temporary_hash[0] & temporary_hash[2]) ^ (temporary_hash[1] & temporary_hash[2]);
tmp[1] = s[0] + maj;
temporary_hash[7] = temporary_hash[6];
temporary_hash[6] = temporary_hash[5];
temporary_hash[5] = temporary_hash[4];
temporary_hash[4] = temporary_hash[3] + (uint64_t)tmp[0];
temporary_hash[3] = temporary_hash[2];
temporary_hash[2] = temporary_hash[1];
temporary_hash[1] = temporary_hash[0];
temporary_hash[0] = (uint64_t)(tmp[0] + tmp[1]);
return (0);
}
/**
@brief Set 128-byte long message from 2x 64-byte chunks for SHA512
@param message message string
@param chunk address of current head of chunks linked list
*/
static void set_message(uint64_t *message, t_message **chunk)
{
int part;
part = 0;
ft_memset(message, 0, 128);
while (part < 2)
{
ft_memcpy(&message[part * 8], chunk[0]->string, 64);
part++;
if (part < 2 && chunk[0]->next == NULL)
{
message[15] = message[7];
message[7] = 0;
break ;
}
if (part < 2)
chunk[0] = chunk[0]->next;
}
}
/**
@brief Set temporary working array of 64-bit words
@param w temporary working array
@param message current message chunk casted to uint_64
@return temporary working array
*/
static uint64_t *set_work(uint64_t *w, uint64_t *message)
{
int cycle;
uint64_t s0;
uint64_t s1;
ft_memset(w, 0, sizeof(uint64_t) * 16);
set_vars64(w, (uint64_t*)message, 16, !ADD);
cycle = 16;
while (cycle < 80)
{
s0 = ((w[cycle - 15] >> 1) | (w[cycle - 15] << (64 - 1))) ^
((w[cycle - 15] >> 8) | (w[cycle - 15] << (64 - 8))) ^ (w[cycle - 15] >> 7);
s1 = ((w[cycle - 2] >> 19) | (w[cycle - 2] << (64 - 19))) ^
((w[cycle - 2] >> 61) | (w[cycle - 2] << (64 - 61))) ^ (w[cycle - 2] >> 6);
w[cycle] = w[cycle - 16] + s0 + w[cycle - 7] + s1;
cycle++;
}
return (w);
}
/**
@brief Main loop of 64-bit version of SHA2 algorithm
@param function_name function name
@param hash array of 64-bit hash words
@param head beginning of linked list of message chunks
@return zero on success, error number otherwise
*/
static int main_loop(char *function_name, uint64_t *hash, t_message *head)
{
uint64_t temporary_hash[8];
uint64_t work[80];
int cycle;
unsigned char message[128];
while (head)
{
set_message((uint64_t*)message, &head);
change_endian64((uint64_t*)message, head->next == NULL);
set_work(work, (uint64_t*)message);
set_vars64(temporary_hash, hash, 8, !ADD);
cycle = 0;
while (cycle < 80)
{
if (compress512(temporary_hash, work, cycle))
print_error(function_name, "", NULL, COMPRESSION_ERROR);
cycle++;
}
set_vars64(hash, temporary_hash, 8, ADD);
head = head->next;
}
return (0);
}
t_data *sha512(int message_flag, int file_descr, char *string)
{
static t_data data;
ft_memset(&data, 0, sizeof(data));
if (file_descr >= 0 ? read_fd(&data, file_descr) : read_str(&data, string))
print_error("sha512", "", NULL, NO_PERMISSION);
data.is_file = file_descr > 0;
data.filename = file_descr > 0 ? string : NULL;
data.is_string = file_descr < 0;
data.string = file_descr < 0 ? string : NULL;
set_vars64(data.hash, (uint64_t[]){0x6a09e667f3bcc908,
0xbb67ae8584caa73b, 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1,
0x510e527fade682d1, 0x9b05688c2b3e6c1f, 0x1f83d9abfb41bd6b,
0x5be0cd19137e2179}, 8, !ADD);
if (main_loop("sha512", (uint64_t*)data.hash, data.chunk))
print_error("sha512", "", NULL, MAIN_LOOP_ERROR);
if (message_flag)
print_message(data.chunk);
free_data(data.chunk);
return (&data);
}
t_data *sha384(int message_flag, int file_descr, char *string)
{
static t_data data;
ft_memset(&data, 0, sizeof(data));
if (file_descr >= 0 ? read_fd(&data, file_descr) : read_str(&data, string))
print_error("sha384", "", NULL, NO_PERMISSION);
data.is_file = file_descr > 0;
data.filename = file_descr > 0 ? string : NULL;
data.is_string = file_descr < 0;
data.string = file_descr < 0 ? string : NULL;
set_vars64(data.hash, (uint64_t[]){0xcbbb9d5dc1059ed8,
0x629a292a367cd507, 0x9159015a3070dd17, 0x152fecd8f70e5939,
0x67332667ffc00b31, 0x8eb44a8768581511, 0xdb0c2e0d64f98fa7,
0x47b5481dbefa4fa4}, 8, !ADD);
if (main_loop("sha384", (uint64_t*)data.hash, data.chunk))
print_error("sha384", "", NULL, MAIN_LOOP_ERROR);
if (message_flag)
print_message(data.chunk);
free_data(data.chunk);
return (&data);
}