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refactoring/simplification: use b58check_enc () when possible

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philsmd 2022-06-18 11:24:12 +02:00
parent 500cbc8571
commit 59838fa27c
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GPG Key ID: 4F25D016D9D6A8AF
2 changed files with 6 additions and 94 deletions
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50
src/modules/module_28501.c
View File

@ -11,7 +11,6 @@
#include "shared.h"
#include "memory.h"
#include "emu_inc_hash_sha256.h"
#include "emu_inc_hash_base58.h"
static const u32 ATTACK_EXEC = ATTACK_EXEC_INSIDE_KERNEL;
@ -122,54 +121,11 @@ int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
{
u8 *digest = (u8 *) digest_buf;
u8 bin[64] = { 0 };
// add 00 byte at front indicating BTC PubKey Hash160
for (u32 i = 0; i < 20; i++)
{
bin[i + 1] = digest[i]; // + 1 because we have \x00 at the start
}
// calculate sha256 twice
u32 *bin32 = (u32 *) bin;
sha256_ctx_t ctx;
sha256_init (&ctx);
sha256_update_swap (&ctx, bin32, 21);
sha256_final (&ctx);
u32 data[16] = { 0 };
for (u32 i = 0; i < 8; i++) // 8 * 4 = 32 bytes
{
data[i] = ctx.h[i];
}
sha256_init (&ctx);
sha256_update (&ctx, data, 32);
sha256_final (&ctx);
ctx.h[0] = byte_swap_32 (ctx.h[0]);
// put sha256 after pub key hash160
u8 *hash = &bin[21];
for (u32 i = 0; i < 4; i++)
{
((u8*) hash)[i] = ((u8*) ctx.h)[i];
}
// base58 encode
u32 bufsz = 41;
u8 buf[64] = { 0 };
b58enc (buf, &bufsz, bin, 25);
u32 len = 64;
b58check_enc (buf, &len, 0, digest, 20);
return snprintf (line_buf, line_size, "%s", buf);
}

50
src/modules/module_28502.c
View File

@ -11,7 +11,6 @@
#include "shared.h"
#include "memory.h"
#include "emu_inc_hash_sha256.h"
#include "emu_inc_hash_base58.h"
static const u32 ATTACK_EXEC = ATTACK_EXEC_INSIDE_KERNEL;
@ -122,54 +121,11 @@ int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
{
u8 *digest = (u8 *) digest_buf;
u8 bin[64] = { 0 };
// add 00 byte at front indicating BTC PubKey Hash160
for (u32 i = 0; i < 20; i++)
{
bin[i + 1] = digest[i]; // + 1 because we have \x00 at the start
}
// calculate sha256 twice
u32 *bin32 = (u32 *) bin;
sha256_ctx_t ctx;
sha256_init (&ctx);
sha256_update_swap (&ctx, bin32, 21);
sha256_final (&ctx);
u32 data[16] = { 0 };
for (u32 i = 0; i < 8; i++) // 8 * 4 = 32 bytes
{
data[i] = ctx.h[i];
}
sha256_init (&ctx);
sha256_update (&ctx, data, 32);
sha256_final (&ctx);
ctx.h[0] = byte_swap_32 (ctx.h[0]);
// put sha256 after pub key hash160
u8 *hash = &bin[21];
for (u32 i = 0; i < 4; i++)
{
((u8*) hash)[i] = ((u8*) ctx.h)[i];
}
// base58 encode
u32 bufsz = 41;
u8 buf[64] = { 0 };
b58enc (buf, &bufsz, bin, 25);
u32 len = 64;
b58check_enc (buf, &len, 0, digest, 20);
return snprintf (line_buf, line_size, "%s", buf);
}