Added SHA1 class.
This commit is contained in:
plfiorini
parent
926b90a3c5
commit
1644625480
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@ -2,3 +2,4 @@ SubDir TOP libs ;
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# Include all the components.
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# Include all the components.
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SubInclude TOP libs libgloox ;
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SubInclude TOP libs libgloox ;
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SubInclude TOP libs libsupport ;
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@ -0,0 +1,7 @@
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SubDir TOP libs libsupport ;
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SubDirSysHdrs [ FDirName $(TOP) libs ] ;
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StaticLibrary libsupport.a :
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SHA1.cpp
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;
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@ -0,0 +1,222 @@
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/*
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100% free public domain implementation of the SHA-1
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algorithm by Dominik Reichl <Dominik.Reichl@swp-net.de>
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=== Test Vectors (from FIPS PUB 180-1) ===
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"abc"
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A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
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"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
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84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
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A million repetitions of "a"
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34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
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*/
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#include "SHA1.h"
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CSHA1::CSHA1()
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{
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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(unsigned long state[5], unsigned char buffer[64])
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{
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unsigned long a = 0, b = 0, c = 0, d = 0, e = 0;
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SHA1_WORKSPACE_BLOCK* block;
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static unsigned char workspace[64];
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block = (SHA1_WORKSPACE_BLOCK*)workspace;
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memcpy(block, buffer, 64);
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// Copy state[] to working vars
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a = state[0];
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b = state[1];
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c = state[2];
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d = state[3];
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e = state[4];
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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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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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state[4] += e;
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// Wipe variables
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a = 0; b = 0; c = 0; d = 0; e = 0;
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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(unsigned char* data, unsigned int len)
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{
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unsigned long i = 0, j = 0;
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j = (m_count[0] >> 3) & 63;
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if((m_count[0] += len << 3) < (len << 3)) m_count[1]++;
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m_count[1] += (len >> 29);
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if((j + len) > 63)
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{
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memcpy(&m_buffer[j], data, (i = 64 - j));
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Transform(m_state, m_buffer);
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for (; i+63 < len; i += 64)
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{
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Transform(m_state, &data[i]);
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}
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j = 0;
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}
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else i = 0;
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memcpy(&m_buffer[j], &data[i], len - i);
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}
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// Hash in file contents
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bool CSHA1::HashFile(char *szFileName)
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{
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unsigned long ulFileSize = 0, ulRest = 0, ulBlocks = 0;
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unsigned long i = 0;
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unsigned char uData[MAX_FILE_READ_BUFFER];
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FILE *fIn = NULL;
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if((fIn = fopen(szFileName, "rb")) == NULL) return(false);
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fseek(fIn, 0, SEEK_END);
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ulFileSize = ftell(fIn);
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fseek(fIn, 0, SEEK_SET);
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ulRest = ulFileSize % MAX_FILE_READ_BUFFER;
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ulBlocks = ulFileSize / MAX_FILE_READ_BUFFER;
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for(i = 0; i < ulBlocks; i++)
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{
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fread(uData, 1, MAX_FILE_READ_BUFFER, fIn);
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Update(uData, MAX_FILE_READ_BUFFER);
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}
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if(ulRest != 0)
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{
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fread(uData, 1, ulRest, fIn);
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Update(uData, ulRest);
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}
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fclose(fIn);
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fIn = NULL;
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return(true);
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}
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void CSHA1::Final()
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{
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unsigned long i = 0, j = 0;
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unsigned char finalcount[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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for (i = 0; i < 8; i++)
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finalcount[i] = (unsigned char)((m_count[(i >= 4 ? 0 : 1)]
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>> ((3 - (i & 3)) * 8) ) & 255); // Endian independent
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Update((unsigned char *)"\200", 1);
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while ((m_count[0] & 504) != 448)
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Update((unsigned char *)"\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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{
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m_digest[i] = (unsigned char)((m_state[i >> 2] >> ((3 - (i & 3)) * 8) ) & 255);
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}
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// Wipe variables for security reasons
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i = 0; j = 0;
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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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}
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// Get the final hash as a pre-formatted string
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void CSHA1::ReportHash(char *szReport, unsigned char uReportType)
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{
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unsigned char i = 0;
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if(uReportType == REPORT_HEX)
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{
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sprintf(szReport, "%02X", m_digest[0]);
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for(i = 1; i < 20; i++)
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{
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sprintf(szReport, "%s%02X", szReport, m_digest[i]);
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}
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}
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else if(uReportType == REPORT_DIGIT)
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{
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sprintf(szReport, "%u", m_digest[0]);
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for(i = 1; i < 20; i++)
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{
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sprintf(szReport, "%s %u", szReport, m_digest[i]);
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}
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}
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else sprintf(szReport, "Error: Unknown report type!");
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}
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// Get the raw message digest
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void CSHA1::GetHash(unsigned char *uDest)
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{
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unsigned char i = 0;
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for(i = 0; i < 20; i++)
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uDest[i] = m_digest[i];
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}
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@ -0,0 +1,81 @@
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/*
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100% free public domain implementation of the SHA-1
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algorithm by Dominik Reichl <Dominik.Reichl@swp-net.de>
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=== Test Vectors (from FIPS PUB 180-1) ===
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"abc"
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A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
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"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
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84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
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A million repetitions of "a"
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34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
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*/
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#ifndef ___SHA1_H___
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#define ___SHA1_H___
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#include <stdio.h> // Needed for file access
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#include <memory.h> // Needed for memset and memcpy
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//#define LITTLE_ENDIAN
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#define MAX_FILE_READ_BUFFER 8000
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class CSHA1
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{
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public:
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// Rotate x bits to the left
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#define ROL32(value, bits) (((value)<<(bits))|((value)>>(32-(bits))))
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#ifdef LITTLE_ENDIAN
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#define SHABLK0(i) (block->l[i] = (ROL32(block->l[i],24) & 0xFF00FF00) | (ROL32(block->l[i],8) & 0x00FF00FF))
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#else
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#define SHABLK0(i) (block->l[i])
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#endif
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#define SHABLK(i) (block->l[i&15] = ROL32(block->l[(i+13)&15] ^ block->l[(i+8)&15] ^ block->l[(i+2)&15] ^ 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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typedef union {
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unsigned char c[64];
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unsigned long l[16];
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} SHA1_WORKSPACE_BLOCK;
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// Two different formats for ReportHash(...)
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enum { REPORT_HEX = 0, REPORT_DIGIT = 1 };
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// Constructor and Destructor
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CSHA1();
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virtual ~CSHA1();
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unsigned long m_state[5];
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unsigned long m_count[2];
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unsigned char m_buffer[64];
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unsigned char m_digest[20];
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void Reset();
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// Update the hash value
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void Update(unsigned char* data, unsigned int len);
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bool HashFile(char *szFileName);
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// Finalize hash and report
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void Final();
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void ReportHash(char *szReport, unsigned char uReportType = REPORT_HEX);
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void GetHash(unsigned char *uDest);
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private:
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// Private SHA-1 transformation
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void Transform(unsigned long state[5], unsigned char buffer[64]);
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};
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#endif // ___SHA1_H___
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