diff options
| -rw-r--r-- | static/solver.c | 2 | ||||
| -rw-r--r-- | wasm/sha256.c | 22 | ||||
| -rw-r--r-- | wasm/sha256.h | 14 | ||||
| -rw-r--r-- | wasm/solver.c | 14 |
4 files changed, 13 insertions, 39 deletions
diff --git a/static/solver.c b/static/solver.c index a06140e..73fb98f 100644 --- a/static/solver.c +++ b/static/solver.c @@ -106,7 +106,7 @@ int main(int argc, char **argv) unsigned char digest[len]; size_t next = 0; - while (1) { + for (;;) { if (EVP_DigestInit_ex(mdctx, EVP_sha256(), NULL) != 1) { fprintf(stderr, "EVP_DigestInit_ex\n"); EVP_MD_CTX_free(mdctx); diff --git a/wasm/sha256.c b/wasm/sha256.c index 3d6e9f1..f641cbd 100644 --- a/wasm/sha256.c +++ b/wasm/sha256.c @@ -1,21 +1,9 @@ -/********************************************************************* -* Filename: sha256.c -* Author: Brad Conte (brad AT bradconte.com) -* Copyright: Identified to be public domain by ducky -* Disclaimer: This code is presented "as is" without any guarantees. -* Details: Implementation of the SHA-256 hashing algorithm. - SHA-256 is one of the three algorithms in the SHA2 - specification. The others, SHA-384 and SHA-512, are not - offered in this implementation. - Algorithm specification can be found here: - * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2withchangenotice.pdf - This implementation uses little endian byte order. -*********************************************************************/ - -/*************************** HEADER FILES ***************************/ +// SPDX-FileContributor: Brad Conte <brad@bradconte.com> +// Identified to be public domain by ducky +// Disclaimer: This code is presented "as is" without any guarantees. + #include "sha256.h" -/****************************** MACROS ******************************/ #define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b)))) #define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b)))) @@ -32,7 +20,6 @@ ((unsigned char *)(ptr))[i] = (unsigned char)(value); \ } while (0) -/**************************** VARIABLES *****************************/ static const WORD k[64] = { 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, @@ -44,7 +31,6 @@ static const WORD k[64] = { 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 }; -/*********************** FUNCTION DEFINITIONS ***********************/ void sha256_transform(SHA256_CTX *ctx, const BYTE data[]) { WORD a, b, c, d, e, f, g, h, i, j, t1, t2, m[64]; diff --git a/wasm/sha256.h b/wasm/sha256.h index bbf9abc..659a5ad 100644 --- a/wasm/sha256.h +++ b/wasm/sha256.h @@ -1,21 +1,14 @@ -/********************************************************************* -* Filename: sha256.h -* Author: Brad Conte (brad AT bradconte.com) -* Copyright: Identified to be public domain by ducky -* Disclaimer: This code is presented "as is" without any guarantees. -* Details: Defines the API for the corresponding SHA1 implementation. -*********************************************************************/ +// SPDX-FileContributor: Brad Conte <brad@bradconte.com> +// Identified to be public domain by ducky +// Disclaimer: This code is presented "as is" without any guarantees. #ifndef SHA256_H #define SHA256_H -/*************************** HEADER FILES ***************************/ #include <stddef.h> -/****************************** MACROS ******************************/ #define SHA256_BLOCK_SIZE 32 // SHA256 outputs a 32 byte digest -/**************************** DATA TYPES ****************************/ typedef unsigned char BYTE; // 8-bit byte typedef unsigned int WORD; // 32-bit word, change to "long" for 16-bit machines @@ -26,7 +19,6 @@ typedef struct { WORD state[8]; } SHA256_CTX; -/*********************** FUNCTION DECLARATIONS **********************/ void sha256_init(SHA256_CTX * ctx); void sha256_update(SHA256_CTX * ctx, const BYTE data[], size_t len); void sha256_final(SHA256_CTX * ctx, BYTE hash[]); diff --git a/wasm/solver.c b/wasm/solver.c index 890a34c..2eb39c5 100644 --- a/wasm/solver.c +++ b/wasm/solver.c @@ -11,16 +11,13 @@ char validate_hash(unsigned char *hash, unsigned char zero_bit_count) unsigned char q = zero_bit_count / 8; unsigned char r = zero_bit_count % 8; - for (unsigned char i = 0; i < q; i++) { - if (hash[i] != 0) { + for (unsigned char i = 0; i < q; i++) + if (hash[i] != 0) return 0; - } - } if (r > 0) { unsigned char mask = (unsigned char)(0xFF << (8 - r)); - if (hash[q] & mask) { + if (hash[q] & mask) return 0; - } } return 1; @@ -40,16 +37,15 @@ unsigned long long solve(unsigned char difficulty) nonce = 0; - while (1) { + for (;;) { sha256_init(&context); sha256_update(&context, challenge, sizeof(challenge)); sha256_update(&context, (unsigned char *)(&nonce), sizeof(nonce)); sha256_final(&context, hash); - if (validate_hash(hash, difficulty)) { + if (validate_hash(hash, difficulty)) break; - } nonce++; } |