mirror of
https://github.com/tenrok/Rfid-Credential-Provider.git
synced 2026-05-27 14:49:05 +03:00
Tyler Menezes
250 lines
6.6 KiB
C++
250 lines
6.6 KiB
C++
#define _CRT_SECURE_NO_WARNINGS
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#include "SHA1.h"
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#ifdef SHA1_UTILITY_FUNCTIONS
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#define SHA1_MAX_FILE_BUFFER 8000
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#endif
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// Rotate x bits to the left
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#ifndef ROL32
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#ifdef _MSC_VER
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#define ROL32(_val32,_nBits) _rotl(_val32,_nBits)
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#else
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#define ROL32(_val32,_nBits) (((_val32)<<(_nBits))|((_val32)>>(32-(_nBits))))
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#endif
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#endif
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#ifdef SHA1_LITTLE_ENDIAN
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#define SHABLK0(i) (m_block->l[i] = \
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(ROL32(m_block->l[i],24) & 0xFF00FF00) | (ROL32(m_block->l[i],8) & 0x00FF00FF))
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#else
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#define SHABLK0(i) (m_block->l[i])
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#endif
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#define SHABLK(i) (m_block->l[i&15] = ROL32(m_block->l[(i+13)&15] ^ m_block->l[(i+8)&15] \
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^ m_block->l[(i+2)&15] ^ m_block->l[i&15],1))
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// SHA-1 rounds
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#define _R0(v,w,x,y,z,i) {z+=((w&(x^y))^y)+SHABLK0(i)+0x5A827999+ROL32(v,5);w=ROL32(w,30);}
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#define _R1(v,w,x,y,z,i) {z+=((w&(x^y))^y)+SHABLK(i)+0x5A827999+ROL32(v,5);w=ROL32(w,30);}
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#define _R2(v,w,x,y,z,i) {z+=(w^x^y)+SHABLK(i)+0x6ED9EBA1+ROL32(v,5);w=ROL32(w,30);}
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#define _R3(v,w,x,y,z,i) {z+=(((w|x)&y)|(w&x))+SHABLK(i)+0x8F1BBCDC+ROL32(v,5);w=ROL32(w,30);}
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#define _R4(v,w,x,y,z,i) {z+=(w^x^y)+SHABLK(i)+0xCA62C1D6+ROL32(v,5);w=ROL32(w,30);}
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CSHA1::CSHA1()
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{
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m_block = (SHA1_WORKSPACE_BLOCK*)m_workspace;
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Reset();
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}
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CSHA1::~CSHA1()
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{
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Reset();
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}
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void CSHA1::Reset()
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{
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// SHA1 initialization constants
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m_state[0] = 0x67452301;
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m_state[1] = 0xEFCDAB89;
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m_state[2] = 0x98BADCFE;
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m_state[3] = 0x10325476;
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m_state[4] = 0xC3D2E1F0;
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m_count[0] = 0;
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m_count[1] = 0;
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}
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void CSHA1::Transform(UINT_32* pState, const UINT_8* pBuffer)
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{
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UINT_32 a = pState[0], b = pState[1], c = pState[2], d = pState[3], e = pState[4];
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memcpy(m_block, pBuffer, 64);
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// 4 rounds of 20 operations each. Loop unrolled.
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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_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);
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// Add the working vars back into state
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pState[0] += a;
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pState[1] += b;
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pState[2] += c;
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pState[3] += d;
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pState[4] += e;
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// Wipe variables
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#ifdef SHA1_WIPE_VARIABLES
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a = b = c = d = e = 0;
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#endif
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}
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// Use this function to hash in binary data and strings
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void CSHA1::Update(const UINT_8* pbData, UINT_32 uLen)
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{
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UINT_32 j = ((m_count[0] >> 3) & 0x3F);
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if((m_count[0] += (uLen << 3)) < (uLen << 3))
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++m_count[1]; // Overflow
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m_count[1] += (uLen >> 29);
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UINT_32 i;
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if((j + uLen) > 63)
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{
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i = 64 - j;
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memcpy(&m_buffer[j], pbData, i);
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Transform(m_state, m_buffer);
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for( ; (i + 63) < uLen; i += 64)
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Transform(m_state, &pbData[i]);
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j = 0;
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}
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else i = 0;
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if((uLen - i) != 0)
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memcpy(&m_buffer[j], &pbData[i], uLen - i);
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}
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#ifdef SHA1_UTILITY_FUNCTIONS
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// Hash in file contents
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bool CSHA1::HashFile(const TCHAR* tszFileName)
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{
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if(tszFileName == NULL) return false;
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FILE* fpIn = _tfopen(tszFileName, _T("rb"));
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if(fpIn == NULL) return false;
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_fseeki64(fpIn, 0, SEEK_END);
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const INT_64 lFileSize = _ftelli64(fpIn);
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_fseeki64(fpIn, 0, SEEK_SET);
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const INT_64 lMaxBuf = SHA1_MAX_FILE_BUFFER;
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UINT_8 vData[SHA1_MAX_FILE_BUFFER];
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INT_64 lRemaining = lFileSize;
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while(lRemaining > 0)
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{
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const size_t uMaxRead = static_cast<size_t>((lRemaining > lMaxBuf) ?
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lMaxBuf : lRemaining);
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const size_t uRead = fread(vData, 1, uMaxRead, fpIn);
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if(uRead == 0)
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{
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fclose(fpIn);
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return false;
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}
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Update(vData, static_cast<UINT_32>(uRead));
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lRemaining -= static_cast<INT_64>(uRead);
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}
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fclose(fpIn);
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return (lRemaining == 0);
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}
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#endif
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void CSHA1::Final()
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{
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UINT_32 i;
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UINT_8 finalcount[8];
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for(i = 0; i < 8; ++i)
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finalcount[i] = (UINT_8)((m_count[((i >= 4) ? 0 : 1)]
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>> ((3 - (i & 3)) * 8) ) & 255); // Endian independent
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Update((UINT_8*)"\200", 1);
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while ((m_count[0] & 504) != 448)
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Update((UINT_8*)"\0", 1);
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Update(finalcount, 8); // Cause a SHA1Transform()
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for(i = 0; i < 20; ++i)
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m_digest[i] = (UINT_8)((m_state[i >> 2] >> ((3 - (i & 3)) * 8)) & 0xFF);
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// Wipe variables for security reasons
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#ifdef SHA1_WIPE_VARIABLES
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memset(m_buffer, 0, 64);
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memset(m_state, 0, 20);
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memset(m_count, 0, 8);
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memset(finalcount, 0, 8);
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Transform(m_state, m_buffer);
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#endif
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}
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#ifdef SHA1_UTILITY_FUNCTIONS
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// Get the final hash as a pre-formatted string
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bool CSHA1::ReportHash(TCHAR* tszReport, REPORT_TYPE rtReportType) const
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{
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if(tszReport == NULL) return false;
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TCHAR tszTemp[16];
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if((rtReportType == REPORT_HEX) || (rtReportType == REPORT_HEX_SHORT))
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{
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_sntprintf(tszTemp, 15, _T("%02X"), m_digest[0]);
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_tcscpy(tszReport, tszTemp);
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const TCHAR* lpFmt = ((rtReportType == REPORT_HEX) ? _T(" %02X") : _T("%02X"));
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for(size_t i = 1; i < 20; ++i)
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{
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_sntprintf(tszTemp, 15, lpFmt, m_digest[i]);
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_tcscat(tszReport, tszTemp);
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}
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}
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else if(rtReportType == REPORT_DIGIT)
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{
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_sntprintf(tszTemp, 15, _T("%u"), m_digest[0]);
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_tcscpy(tszReport, tszTemp);
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for(size_t i = 1; i < 20; ++i)
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{
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_sntprintf(tszTemp, 15, _T(" %u"), m_digest[i]);
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_tcscat(tszReport, tszTemp);
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}
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}
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else return false;
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return true;
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}
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#endif
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#ifdef SHA1_STL_FUNCTIONS
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bool CSHA1::ReportHashStl(std::basic_string<TCHAR>& strOut, REPORT_TYPE rtReportType) const
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{
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TCHAR tszOut[84];
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const bool bResult = ReportHash(tszOut, rtReportType);
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if(bResult) strOut = tszOut;
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return bResult;
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}
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#endif
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// Get the raw message digest
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bool CSHA1::GetHash(UINT_8* pbDest) const
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{
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if(pbDest == NULL) return false;
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memcpy(pbDest, m_digest, 20);
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return true;
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}
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