Enum lucky_commit::Sha256

pub enum Sha256 {}

The hash type used for Sha256 git repositories. This type is uninhabited, and is only intended to be used as a type parameter.

Trait Implementations

impl Clone for Sha256

fn clone(&self) -> Sha256

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Sha256

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl GitHashFn for Sha256

type State = [u32; 8]

The type of the output and intermediate state of this hash function. For sha1 and sha256, this is [u32; N] for some N. Ideally this trait would just have an associated const for the length of the state vector, and then State would be defined as [u32; N], but this isn’t possible due to https://github.com/rust-lang/rust/issues/60551.

const INITIAL_STATE: Self::State = _

The initial value of the state vector for the given algorithm

type Block = GenericArray<u8, <CoreWrapper<CtVariableCoreWrapper<Sha256VarCore, UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>, OidSha256>> as BlockSizeUser>::BlockSize>

The datatype representing a block for this algorithm. This must be layout-equivalent to [u8; 64], although the nominal type that gets used might be different on a per-library basis due to const generic limitations.

fn compress(state: &mut Self::State, blocks: &[Self::Block])

Processes a set of blocks using the given algorithm

const KERNEL: &'static str = "// Note: A lot of code is duplicated between this file and sha1_matcher.cl.\nuint16 arrange_padding_block(ulong padding_specifier, uint4 padding_block_ending);\nvoid sha256_compress(__private uint* h, uint16 w);\n\n__constant uint PADDING_CHUNKS[16] = {\n 0x20202020, 0x20202009, 0x20200920, 0x20200909,\n 0x20092020, 0x20092009, 0x20090920, 0x20090909,\n 0x09202020, 0x09202009, 0x09200920, 0x09200909,\n 0x09092020, 0x09092009, 0x09090920, 0x09090909,\n};\n\n__kernel void scatter_padding_and_find_match(\n __global uint* hash_spec_data,\n __global uint* hash_spec_mask,\n __global uint* h,\n ulong base_padding_specifier,\n __global uint16* dynamic_blocks,\n ulong num_dynamic_blocks,\n __global uint* successful_match_receiver\n) {\n uint finalized_hash[8] = {h[0], h[1], h[2], h[3], h[4], h[5], h[6], h[7]};\n sha256_compress(\n finalized_hash,\n arrange_padding_block(\n base_padding_specifier + get_global_id(0),\n dynamic_blocks[0].sCDEF\n )\n );\n for (size_t i = 1; i < num_dynamic_blocks; i++) {\n sha256_compress(finalized_hash, dynamic_blocks[i]);\n }\n\n if (\n (finalized_hash[0] & hash_spec_mask[0]) == hash_spec_data[0] &&\n (finalized_hash[1] & hash_spec_mask[1]) == hash_spec_data[1] &&\n (finalized_hash[2] & hash_spec_mask[2]) == hash_spec_data[2] &&\n (finalized_hash[3] & hash_spec_mask[3]) == hash_spec_data[3] &&\n (finalized_hash[4] & hash_spec_mask[4]) == hash_spec_data[4] &&\n (finalized_hash[5] & hash_spec_mask[5]) == hash_spec_data[5] &&\n (finalized_hash[6] & hash_spec_mask[6]) == hash_spec_data[6] &&\n (finalized_hash[7] & hash_spec_mask[7]) == hash_spec_data[7]\n ) {\n atomic_cmpxchg(successful_match_receiver, UINT_MAX, get_global_id(0));\n }\n}\n\nuint16 arrange_padding_block(ulong padding_specifier, uint4 padding_block_ending) {\n return (uint16)(\n PADDING_CHUNKS[(padding_specifier >> 4) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 0) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 12) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 8) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 20) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 16) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 28) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 24) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 36) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 32) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 44) & 0xf],\n PADDING_CHUNKS[(padding_specifier >> 40) & 0xf],\n padding_block_ending.s0,\n padding_block_ending.s1,\n padding_block_ending.s2,\n padding_block_ending.s3\n );\n}\n\n/*\nThe sha256 implementation below is mostly adapted from hashcat (https://hashcat.net/hashcat).\n\nThe MIT License (MIT)\n\nCopyright (c) 2015-2021 Jens Steube\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n*/\n\n__constant uint k_sha256[64] = {\n 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,\n 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,\n 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,\n 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,\n\n 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,\n 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,\n 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,\n 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,\n\n 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,\n 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,\n 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,\n 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,\n\n 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,\n 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,\n 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,\n 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2\n};\n\n#define hc_rotl32_S rotate\n#define SHA256_S0_S(x) (rotate((x), 25u) ^ rotate((x), 14u) ^ ((x) >> 3u))\n#define SHA256_S1_S(x) (rotate((x), 15u) ^ rotate((x), 13u) ^ ((x) >> 10u))\n#define SHA256_S2_S(x) (rotate((x), 30u) ^ rotate((x), 19u) ^ rotate((x), 10u))\n#define SHA256_S3_S(x) (rotate((x), 26u) ^ rotate((x), 21u) ^ rotate((x), 7u))\n\n#define SHA256_F0o(x,y,z) (bitselect ((x), (y), ((x) ^ (z))))\n#define SHA256_F1o(x,y,z) (bitselect ((z), (y), (x)))\n\n#define SHA256_STEP_S(F0,F1,a,b,c,d,e,f,g,h,x,K) \\\n{ \\\n h += K + x + SHA256_S3_S (e) + F1 (e,f,g); \\\n d += h; \\\n h += SHA256_S2_S (a) + F0 (a,b,c); \\\n}\n#define SHA256_EXPAND_S(x,y,z,w) (SHA256_S1_S (x) + y + SHA256_S0_S (z) + w)\n\nvoid sha256_compress(__private uint* hash, uint16 w) {\n uint a = hash[0];\n uint b = hash[1];\n uint c = hash[2];\n uint d = hash[3];\n uint e = hash[4];\n uint f = hash[5];\n uint g = hash[6];\n uint h = hash[7];\n\n uint w0_t = w.s0;\n uint w1_t = w.s1;\n uint w2_t = w.s2;\n uint w3_t = w.s3;\n uint w4_t = w.s4;\n uint w5_t = w.s5;\n uint w6_t = w.s6;\n uint w7_t = w.s7;\n uint w8_t = w.s8;\n uint w9_t = w.s9;\n uint wa_t = w.sA;\n uint wb_t = w.sB;\n uint wc_t = w.sC;\n uint wd_t = w.sD;\n uint we_t = w.sE;\n uint wf_t = w.sF;\n\n #define ROUND_EXPAND_S() \\\n { \\\n w0_t = SHA256_EXPAND_S (we_t, w9_t, w1_t, w0_t); \\\n w1_t = SHA256_EXPAND_S (wf_t, wa_t, w2_t, w1_t); \\\n w2_t = SHA256_EXPAND_S (w0_t, wb_t, w3_t, w2_t); \\\n w3_t = SHA256_EXPAND_S (w1_t, wc_t, w4_t, w3_t); \\\n w4_t = SHA256_EXPAND_S (w2_t, wd_t, w5_t, w4_t); \\\n w5_t = SHA256_EXPAND_S (w3_t, we_t, w6_t, w5_t); \\\n w6_t = SHA256_EXPAND_S (w4_t, wf_t, w7_t, w6_t); \\\n w7_t = SHA256_EXPAND_S (w5_t, w0_t, w8_t, w7_t); \\\n w8_t = SHA256_EXPAND_S (w6_t, w1_t, w9_t, w8_t); \\\n w9_t = SHA256_EXPAND_S (w7_t, w2_t, wa_t, w9_t); \\\n wa_t = SHA256_EXPAND_S (w8_t, w3_t, wb_t, wa_t); \\\n wb_t = SHA256_EXPAND_S (w9_t, w4_t, wc_t, wb_t); \\\n wc_t = SHA256_EXPAND_S (wa_t, w5_t, wd_t, wc_t); \\\n wd_t = SHA256_EXPAND_S (wb_t, w6_t, we_t, wd_t); \\\n we_t = SHA256_EXPAND_S (wc_t, w7_t, wf_t, we_t); \\\n wf_t = SHA256_EXPAND_S (wd_t, w8_t, w0_t, wf_t); \\\n }\n\n #define ROUND_STEP_S(i) \\\n { \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, a, b, c, d, e, f, g, h, w0_t, k_sha256[i + 0]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, h, a, b, c, d, e, f, g, w1_t, k_sha256[i + 1]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, g, h, a, b, c, d, e, f, w2_t, k_sha256[i + 2]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, f, g, h, a, b, c, d, e, w3_t, k_sha256[i + 3]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, e, f, g, h, a, b, c, d, w4_t, k_sha256[i + 4]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, d, e, f, g, h, a, b, c, w5_t, k_sha256[i + 5]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, c, d, e, f, g, h, a, b, w6_t, k_sha256[i + 6]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, b, c, d, e, f, g, h, a, w7_t, k_sha256[i + 7]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, a, b, c, d, e, f, g, h, w8_t, k_sha256[i + 8]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, h, a, b, c, d, e, f, g, w9_t, k_sha256[i + 9]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, g, h, a, b, c, d, e, f, wa_t, k_sha256[i + 10]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, f, g, h, a, b, c, d, e, wb_t, k_sha256[i + 11]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, e, f, g, h, a, b, c, d, wc_t, k_sha256[i + 12]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, d, e, f, g, h, a, b, c, wd_t, k_sha256[i + 13]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, c, d, e, f, g, h, a, b, we_t, k_sha256[i + 14]); \\\n SHA256_STEP_S (SHA256_F0o, SHA256_F1o, b, c, d, e, f, g, h, a, wf_t, k_sha256[i + 15]); \\\n }\n\n ROUND_STEP_S (0);\n\n for (int i = 16; i < 64; i += 16) {\n ROUND_EXPAND_S (); ROUND_STEP_S (i);\n }\n\n hash[0] += a;\n hash[1] += b;\n hash[2] += c;\n hash[3] += d;\n hash[4] += e;\n hash[5] += f;\n hash[6] += g;\n hash[7] += h;\n}\n"

Source code of an OpenCL shader kernel finding hash matches for the given algorithm. The kernel should have a function scatter_padding_and_find_match, which accepts the following parameters:

impl PartialEq for Sha256

fn eq(&self, other: &Sha256) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Sha256

impl StructuralPartialEq for Sha256