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doc: describe magic numbers

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lohhiiccc 2026-05-19 14:50:36 +02:00
parent 08bc228d19
commit a9a76d67f9
3 changed files with 18 additions and 0 deletions
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5
src/md5/md5.c
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@ -13,6 +13,11 @@ const uint32_t g_md5_s[64] = {
#undef S_ROUND #undef S_ROUND
/*
* import math
* for i in range(0, 64):
* hex(math.floor(math.pow(2, 32) * abs(math.sin(i+1))))
*/
const uint32_t g_md5_T[64] = { const uint32_t g_md5_T[64] = {
0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,

7
src/sha256/sha256.c
View file

@ -1,5 +1,12 @@
#include "sha256.h" #include "sha256.h"
/*
* for i in range(0, 64):
* p = nth_prime(i + 1)
* value = math.floor((2**32) * ((p ** (1/3)) % 1))
* print(hex(int(value)))
*/
const uint32_t g_sha256_K[64] = { const uint32_t g_sha256_K[64] = {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,

6
src/sha256/sha256_init.c
View file

@ -1,5 +1,11 @@
#include "sha256.h" #include "sha256.h"
/*
* for i in range(0,8):
* p = nth_prime(i + 1)
* frac = math.sqrt(p) % 1
* print(hex(int(frac * 2**32)))
*/
void sha256_init(void *ctx) void sha256_init(void *ctx)
{ {
struct sha256_ctx *local_ctx = ctx; struct sha256_ctx *local_ctx = ctx;