annotate hash.c @ 1337:d092c15246a3

Initial stab at horizontal border when VDP test register layer selection is in effect for H40. Extended horizontal borders in Titancade scene and ninja escape scene mostly correct now
author Michael Pavone <pavone@retrodev.com>
date Sat, 29 Apr 2017 16:51:57 -0700
parents 5ceb316c479a
children 0111c8344477
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5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
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1 #include <stdint.h>
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2 #include <string.h>
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3
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4 //NOTE: This is only intended for use in file identification
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5 //Please do not use this in a cryptographic setting as no attempts have been
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6 //made at avoiding side channel attacks
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7
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8 static uint32_t rotleft(uint32_t val, uint32_t shift)
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9 {
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10 return val << shift | val >> (32-shift);
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11 }
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12
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13 static void sha1_step(uint32_t *state, uint32_t f, uint32_t k, uint32_t w)
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14 {
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15 uint32_t tmp = rotleft(state[0], 5) + f + state[4] + k + w;
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16 state[4] = state[3];
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17 state[3] = state[2];
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18 state[2] = rotleft(state[1], 30);
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19 state[1] = state[0];
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20 state[0] = tmp;
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21 }
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22
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23 static void sha1_chunk(uint8_t *chunk, uint32_t *hash)
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24 {
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25 uint32_t state[5], w[80];
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26 memcpy(state, hash, sizeof(state));
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27 for (uint32_t src = 0; src < 64; src += 4)
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28 {
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
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29 w[src >> 2] = chunk[src] << 24 | chunk[src+1] << 16 | chunk[src+2] << 8 | chunk[src+3];
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30 }
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31 for (uint32_t cur = 16; cur < 80; cur++)
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32 {
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33 w[cur] = rotleft(w[cur-3] ^ w[cur-8] ^ w[cur-14] ^ w[cur-16], 1);
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34 }
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35 for (uint32_t cur = 0; cur < 20; cur++)
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36 {
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37 sha1_step(state, (state[1] & state[2]) | ((~state[1]) & state[3]), 0x5A827999, w[cur]);
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38 }
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39 for (uint32_t cur = 20; cur < 40; cur++)
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40 {
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41 sha1_step(state, state[1] ^ state[2] ^ state[3], 0x6ED9EBA1, w[cur]);
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42 }
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
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43 for (uint32_t cur = 40; cur < 60; cur++)
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44 {
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
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45 sha1_step(state, (state[1] & state[2]) | (state[1] & state[3]) | (state[2] & state[3]), 0x8F1BBCDC, w[cur]);
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46 }
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47 for (uint32_t cur = 60; cur < 80; cur++)
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48 {
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49 sha1_step(state, state[1] ^ state[2] ^ state[3], 0xCA62C1D6, w[cur]);
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50 }
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51 for (uint32_t i = 0; i < 5; i++)
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52 {
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53 hash[i] += state[i];
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54 }
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55 }
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56
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57 void sha1(uint8_t *data, uint64_t size, uint8_t *out)
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58 {
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59 uint32_t hash[5] = {0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0};
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60 uint8_t last[128];
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61 uint32_t last_size = 0;
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62 if ((size & 63) != 0) {
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63 for (uint32_t src = size - (size & 63); src < size; src++)
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64 {
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65 last[last_size++] = data[src];
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66 }
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67 }
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68 uint64_t bitsize = size * 8;
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69 size -= last_size;
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70 last[last_size++] = 0x80;
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71 while ((last_size & 63) != 56)
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72 {
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73 last[last_size++] = 0;
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74 }
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75
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76 last[last_size++] = bitsize >> 56;
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77 last[last_size++] = bitsize >> 48;
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78 last[last_size++] = bitsize >> 40;
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79 last[last_size++] = bitsize >> 32;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
80 last[last_size++] = bitsize >> 24;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
81 last[last_size++] = bitsize >> 16;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
82 last[last_size++] = bitsize >> 8;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
83 last[last_size++] = bitsize;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
84
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
85 for (uint64_t cur = 0; cur < size; cur += 64)
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
86 {
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
87 sha1_chunk(data + cur, hash);
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
88 }
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
89 for (uint64_t cur = 0; cur < last_size; cur += 64)
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
90 {
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
91 sha1_chunk(last + cur, hash);
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
92 }
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
93 for (uint32_t cur = 0; cur < 20; cur += 4)
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
94 {
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
95 uint32_t val = hash[cur >> 2];
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
96 out[cur] = val >> 24;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
97 out[cur+1] = val >> 16;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
98 out[cur+2] = val >> 8;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
99 out[cur+3] = val;
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
100 }
5ceb316c479a Allow games to be specified in ROM DB via sha1 instead of product ID. Added a new ROM DB memory map device type fixed for emulating simple fixed value copy protection registers. Used those two features to support Ya Se Chuan Shuo via a ROM DB entry.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
101 }