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update CMakeLists to correctly compile sources - update readme to reflect that

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factor out reused functions to shared.cpp/shared.h
This commit is contained in:
Neo
2023-05-30 12:37:13 -07:00
parent ac47a88f7e
commit 05ee5eb933
9 changed files with 159 additions and 188 deletions
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70
server_algorithm.cpp
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@@ -1,12 +1,4 @@
#include <stdio.h>
#include <string.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/sha.h>
#include <openssl/rand.h>
#include <assert.h>
uint8_t cset[] = "BCDFGHJKMPQRTVWXY2346789";
#include "shared.h"
#define FIELD_BITS_2003 512
#define FIELD_BYTES_2003 64
@@ -28,66 +20,6 @@ void pack2003(uint32_t *raw, uint32_t *osfamily, uint32_t *hash, uint32_t *sig,
raw[3] = (sig[1] >> 22) | (prefix[0] << 8);
}
static void endian(uint8_t *x, int n)
{
int i;
for (i = 0; i < n/2; i++) {
uint8_t t;
t = x[i];
x[i] = x[n-i-1];
x[n-i-1] = t;
}
}
void unbase24(uint32_t *x, uint8_t *c)
{
memset(x, 0, 16);
int i, n;
BIGNUM *y = BN_new();
BN_zero(y);
for (i = 0; i < 25; i++)
{
BN_mul_word(y, 24);
BN_add_word(y, c[i]);
}
n = BN_num_bytes(y);
BN_bn2bin(y, (uint8_t *)x);
BN_free(y);
endian((uint8_t *)x, n);
}
void base24(uint8_t *c, uint32_t *x)
{
uint8_t y[16];
int i;
BIGNUM *z;
memcpy(y, x, sizeof(y));
for (i = 15; y[i] == 0; i--) {} i++;
endian(y, i);
z = BN_bin2bn(y, i, NULL);
c[25] = 0;
for (i = 24; i >= 0; i--) {
uint8_t t = BN_div_word(z, 24);
c[i] = cset[t];
}
BN_free(z);
}
void print_product_key(uint8_t *pk)
{
int i;
assert(strlen((const char *)pk) == 25);
for (i = 0; i < 25; i++) {
putchar(pk[i]);
if (i != 24 && i % 5 == 4) putchar('-');
}
}
int verify2003(EC_GROUP *ec, EC_POINT *generator, EC_POINT *public_key, char *cdkey)
{
uint8_t key[25];