diff options
Diffstat (limited to 'mp/src/tier1/checksum_sha1.cpp')
| -rw-r--r-- | mp/src/tier1/checksum_sha1.cpp | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/mp/src/tier1/checksum_sha1.cpp b/mp/src/tier1/checksum_sha1.cpp new file mode 100644 index 00000000..97996a63 --- /dev/null +++ b/mp/src/tier1/checksum_sha1.cpp @@ -0,0 +1,299 @@ +//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Implementation of SHA-1
+//
+//=============================================================================
+
+/*
+ 100% free public domain implementation of the SHA-1
+ algorithm by Dominik Reichl <[email protected]>
+
+
+ === Test Vectors (from FIPS PUB 180-1) ===
+
+ SHA1("abc") =
+ A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
+
+ SHA1("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq") =
+ 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
+
+ SHA1(A million repetitions of "a") =
+ 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
+*/
+
+#if !defined(_MINIMUM_BUILD_)
+#include "checksum_sha1.h"
+#else
+//
+// This path is build in the CEG/DRM projects where we require that no CRT references are made !
+//
+#include <intrin.h> // memcpy, memset etc... will be inlined.
+#include "tier1/checksum_sha1.h"
+#endif
+
+#define MAX_FILE_READ_BUFFER 8000
+
+// Rotate x bits to the left
+#ifndef ROL32
+#define ROL32(_val32, _nBits) (((_val32)<<(_nBits))|((_val32)>>(32-(_nBits))))
+#endif
+
+#ifdef SHA1_LITTLE_ENDIAN
+ #define SHABLK0(i) (m_block->l[i] = \
+ (ROL32(m_block->l[i],24) & 0xFF00FF00) | (ROL32(m_block->l[i],8) & 0x00FF00FF))
+#else
+ #define SHABLK0(i) (m_block->l[i])
+#endif
+
+#define SHABLK(i) (m_block->l[i&15] = ROL32(m_block->l[(i+13)&15] ^ m_block->l[(i+8)&15] \
+ ^ m_block->l[(i+2)&15] ^ m_block->l[i&15],1))
+
+// SHA-1 rounds
+#define _R0(v,w,x,y,z,i) { z+=((w&(x^y))^y)+SHABLK0(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
+#define _R1(v,w,x,y,z,i) { z+=((w&(x^y))^y)+SHABLK(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
+#define _R2(v,w,x,y,z,i) { z+=(w^x^y)+SHABLK(i)+0x6ED9EBA1+ROL32(v,5); w=ROL32(w,30); }
+#define _R3(v,w,x,y,z,i) { z+=(((w|x)&y)|(w&x))+SHABLK(i)+0x8F1BBCDC+ROL32(v,5); w=ROL32(w,30); }
+#define _R4(v,w,x,y,z,i) { z+=(w^x^y)+SHABLK(i)+0xCA62C1D6+ROL32(v,5); w=ROL32(w,30); }
+
+#ifdef _MINIMUM_BUILD_
+Minimum_CSHA1::Minimum_CSHA1()
+#else
+CSHA1::CSHA1()
+#endif
+{
+ m_block = (SHA1_WORKSPACE_BLOCK *)m_workspace;
+
+ Reset();
+}
+#ifdef _MINIMUM_BUILD_
+Minimum_CSHA1::~Minimum_CSHA1()
+#else
+CSHA1::~CSHA1()
+#endif
+{
+ // Reset();
+}
+#ifdef _MINIMUM_BUILD_
+void Minimum_CSHA1::Reset()
+#else
+void CSHA1::Reset()
+#endif
+{
+ // SHA1 initialization constants
+ m_state[0] = 0x67452301;
+ m_state[1] = 0xEFCDAB89;
+ m_state[2] = 0x98BADCFE;
+ m_state[3] = 0x10325476;
+ m_state[4] = 0xC3D2E1F0;
+
+ m_count[0] = 0;
+ m_count[1] = 0;
+}
+
+#ifdef _MINIMUM_BUILD_
+void Minimum_CSHA1::Transform(unsigned long state[5], unsigned char buffer[64])
+#else
+void CSHA1::Transform(unsigned long state[5], unsigned char buffer[64])
+#endif
+{
+ unsigned long a = 0, b = 0, c = 0, d = 0, e = 0;
+
+ memcpy(m_block, buffer, 64);
+
+ // Copy state[] to working vars
+ a = state[0];
+ b = state[1];
+ c = state[2];
+ d = state[3];
+ e = state[4];
+
+ // 4 rounds of 20 operations each. Loop unrolled.
+ _R0(a,b,c,d,e, 0); _R0(e,a,b,c,d, 1); _R0(d,e,a,b,c, 2); _R0(c,d,e,a,b, 3);
+ _R0(b,c,d,e,a, 4); _R0(a,b,c,d,e, 5); _R0(e,a,b,c,d, 6); _R0(d,e,a,b,c, 7);
+ _R0(c,d,e,a,b, 8); _R0(b,c,d,e,a, 9); _R0(a,b,c,d,e,10); _R0(e,a,b,c,d,11);
+ _R0(d,e,a,b,c,12); _R0(c,d,e,a,b,13); _R0(b,c,d,e,a,14); _R0(a,b,c,d,e,15);
+ _R1(e,a,b,c,d,16); _R1(d,e,a,b,c,17); _R1(c,d,e,a,b,18); _R1(b,c,d,e,a,19);
+ _R2(a,b,c,d,e,20); _R2(e,a,b,c,d,21); _R2(d,e,a,b,c,22); _R2(c,d,e,a,b,23);
+ _R2(b,c,d,e,a,24); _R2(a,b,c,d,e,25); _R2(e,a,b,c,d,26); _R2(d,e,a,b,c,27);
+ _R2(c,d,e,a,b,28); _R2(b,c,d,e,a,29); _R2(a,b,c,d,e,30); _R2(e,a,b,c,d,31);
+ _R2(d,e,a,b,c,32); _R2(c,d,e,a,b,33); _R2(b,c,d,e,a,34); _R2(a,b,c,d,e,35);
+ _R2(e,a,b,c,d,36); _R2(d,e,a,b,c,37); _R2(c,d,e,a,b,38); _R2(b,c,d,e,a,39);
+ _R3(a,b,c,d,e,40); _R3(e,a,b,c,d,41); _R3(d,e,a,b,c,42); _R3(c,d,e,a,b,43);
+ _R3(b,c,d,e,a,44); _R3(a,b,c,d,e,45); _R3(e,a,b,c,d,46); _R3(d,e,a,b,c,47);
+ _R3(c,d,e,a,b,48); _R3(b,c,d,e,a,49); _R3(a,b,c,d,e,50); _R3(e,a,b,c,d,51);
+ _R3(d,e,a,b,c,52); _R3(c,d,e,a,b,53); _R3(b,c,d,e,a,54); _R3(a,b,c,d,e,55);
+ _R3(e,a,b,c,d,56); _R3(d,e,a,b,c,57); _R3(c,d,e,a,b,58); _R3(b,c,d,e,a,59);
+ _R4(a,b,c,d,e,60); _R4(e,a,b,c,d,61); _R4(d,e,a,b,c,62); _R4(c,d,e,a,b,63);
+ _R4(b,c,d,e,a,64); _R4(a,b,c,d,e,65); _R4(e,a,b,c,d,66); _R4(d,e,a,b,c,67);
+ _R4(c,d,e,a,b,68); _R4(b,c,d,e,a,69); _R4(a,b,c,d,e,70); _R4(e,a,b,c,d,71);
+ _R4(d,e,a,b,c,72); _R4(c,d,e,a,b,73); _R4(b,c,d,e,a,74); _R4(a,b,c,d,e,75);
+ _R4(e,a,b,c,d,76); _R4(d,e,a,b,c,77); _R4(c,d,e,a,b,78); _R4(b,c,d,e,a,79);
+
+ // Add the working vars back into state[]
+ state[0] += a;
+ state[1] += b;
+ state[2] += c;
+ state[3] += d;
+ state[4] += e;
+
+ // Wipe variables
+ a = b = c = d = e = 0;
+}
+
+// Use this function to hash in binary data and strings
+#ifdef _MINIMUM_BUILD_
+void Minimum_CSHA1::Update(unsigned char *data, unsigned int len)
+#else
+void CSHA1::Update(unsigned char *data, unsigned int len)
+#endif
+{
+ unsigned long i = 0, j;
+
+ j = (m_count[0] >> 3) & 63;
+
+ if((m_count[0] += len << 3) < (len << 3)) m_count[1]++;
+
+ m_count[1] += (len >> 29);
+
+ if((j + len) > 63)
+ {
+ memcpy(&m_buffer[j], data, (i = 64 - j));
+ Transform(m_state, m_buffer);
+
+ for (; i+63 < len; i += 64)
+ Transform(m_state, &data[i]);
+
+ j = 0;
+ }
+ else i = 0;
+
+ memcpy(&m_buffer[j], &data[i], len - i);
+}
+
+#if !defined(_MINIMUM_BUILD_)
+// Hash in file contents
+bool CSHA1::HashFile(char *szFileName)
+{
+ unsigned long ulFileSize = 0, ulRest = 0, ulBlocks = 0;
+ unsigned long i = 0;
+ unsigned char uData[MAX_FILE_READ_BUFFER];
+ FILE *fIn = NULL;
+
+ if(szFileName == NULL) return(false);
+
+ if((fIn = fopen(szFileName, "rb")) == NULL) return(false);
+
+ fseek(fIn, 0, SEEK_END);
+ ulFileSize = ftell(fIn);
+ fseek(fIn, 0, SEEK_SET);
+
+ ulRest = ulFileSize % MAX_FILE_READ_BUFFER;
+ ulBlocks = ulFileSize / MAX_FILE_READ_BUFFER;
+
+ for(i = 0; i < ulBlocks; i++)
+ {
+ fread(uData, 1, MAX_FILE_READ_BUFFER, fIn);
+ Update(uData, MAX_FILE_READ_BUFFER);
+ }
+
+ if(ulRest != 0)
+ {
+ fread(uData, 1, ulRest, fIn);
+ Update(uData, ulRest);
+ }
+
+ fclose(fIn);
+ fIn = NULL;
+
+ return(true);
+}
+#endif
+
+#ifdef _MINIMUM_BUILD_
+void Minimum_CSHA1::Final()
+#else
+void CSHA1::Final()
+#endif
+{
+ unsigned long i = 0;
+ unsigned char finalcount[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+
+ for (i = 0; i < 8; i++)
+ finalcount[i] = (unsigned char)((m_count[(i >= 4 ? 0 : 1)]
+ >> ((3 - (i & 3)) * 8) ) & 255); // Endian independent
+
+ Update((unsigned char *)"\200", 1);
+
+ while ((m_count[0] & 504) != 448)
+ Update((unsigned char *)"\0", 1);
+
+ Update(finalcount, 8); // Cause a SHA1Transform()
+
+ for (i = 0; i < k_cubHash; i++)
+ {
+ m_digest[i] = (unsigned char)((m_state[i >> 2] >> ((3 - (i & 3)) * 8) ) & 255);
+ }
+
+ // Wipe variables for security reasons
+ i = 0;
+ memset(m_buffer, 0, sizeof(m_buffer) );
+ memset(m_state, 0, sizeof(m_state) );
+ memset(m_count, 0, sizeof(m_count) );
+ memset(finalcount, 0, sizeof( finalcount) );
+
+ Transform(m_state, m_buffer);
+}
+
+#if !defined(_MINIMUM_BUILD_)
+// Get the final hash as a pre-formatted string
+void CSHA1::ReportHash(char *szReport, unsigned char uReportType)
+{
+ unsigned char i = 0;
+ char szTemp[12];
+
+ if(szReport == NULL) return;
+
+ if(uReportType == REPORT_HEX)
+ {
+ sprintf(szTemp, "%02X", m_digest[0]);
+ strcat(szReport, szTemp);
+
+ for(i = 1; i < k_cubHash; i++)
+ {
+ sprintf(szTemp, " %02X", m_digest[i]);
+ strcat(szReport, szTemp);
+ }
+ }
+ else if(uReportType == REPORT_DIGIT)
+ {
+ sprintf(szTemp, "%u", m_digest[0]);
+ strcat(szReport, szTemp);
+
+ for(i = 1; i < k_cubHash; i++)
+ {
+ sprintf(szTemp, " %u", m_digest[i]);
+ strcat(szReport, szTemp);
+ }
+ }
+ else strcpy(szReport, "Error: Unknown report type!");
+}
+#endif // _MINIMUM_BUILD_
+
+// Get the raw message digest
+#ifdef _MINIMUM_BUILD_
+void Minimum_CSHA1::GetHash(unsigned char *uDest)
+#else
+void CSHA1::GetHash(unsigned char *uDest)
+#endif
+{
+ memcpy(uDest, m_digest, k_cubHash);
+}
+
+#ifndef _MINIMUM_BUILD_
+// utility hash comparison function
+bool HashLessFunc( SHADigest_t const &lhs, SHADigest_t const &rhs )
+{
+ int iRes = memcmp( &lhs, &rhs, sizeof( SHADigest_t ) );
+ return ( iRes < 0 );
+}
+#endif
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