Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / Security / Cryptography / SHA512Managed.cs / 1 / SHA512Managed.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // SHA512Managed.cs // // C# implementation of the proposed SHA-512 hash algorithm // namespace System.Security.Cryptography { using System; [System.Runtime.InteropServices.ComVisible(true)] public class SHA512Managed : SHA512 { private byte[] _buffer; private ulong _count; // Number of bytes in the hashed message private UInt64[] _stateSHA512; private UInt64[] _W; // // public constructors // public SHA512Managed() { if (Utils.FipsAlgorithmPolicy == 1) throw new InvalidOperationException(Environment.GetResourceString("Cryptography_NonCompliantFIPSAlgorithm")); _stateSHA512 = new UInt64[8]; _buffer = new byte[128]; _W = new UInt64[80]; InitializeState(); } // // public methods // public override void Initialize() { InitializeState(); // Zeroize potentially sensitive information. Array.Clear(_buffer, 0, _buffer.Length); Array.Clear(_W, 0, _W.Length); } protected override void HashCore(byte[] rgb, int ibStart, int cbSize) { _HashData(rgb, ibStart, cbSize); } protected override byte[] HashFinal() { return _EndHash(); } // // private methods // private void InitializeState() { _count = 0; _stateSHA512[0] = 0x6a09e667f3bcc908; _stateSHA512[1] = 0xbb67ae8584caa73b; _stateSHA512[2] = 0x3c6ef372fe94f82b; _stateSHA512[3] = 0xa54ff53a5f1d36f1; _stateSHA512[4] = 0x510e527fade682d1; _stateSHA512[5] = 0x9b05688c2b3e6c1f; _stateSHA512[6] = 0x1f83d9abfb41bd6b; _stateSHA512[7] = 0x5be0cd19137e2179; } /* SHA512 block update operation. Continues an SHA message-digest operation, processing another message block, and updating the context. */ private unsafe void _HashData(byte[] partIn, int ibStart, int cbSize) { int bufferLen; int partInLen = cbSize; int partInBase = ibStart; /* Compute length of buffer */ bufferLen = (int) (_count & 0x7f); /* Update number of bytes */ _count += (ulong) partInLen; fixed (UInt64* stateSHA512 = _stateSHA512) { fixed (byte* buffer = _buffer) { fixed (UInt64* expandedBuffer = _W) { if ((bufferLen > 0) && (bufferLen + partInLen >= 128)) { Buffer.InternalBlockCopy(partIn, partInBase, _buffer, bufferLen, 128 - bufferLen); partInBase += (128 - bufferLen); partInLen -= (128 - bufferLen); SHATransform(expandedBuffer, stateSHA512, buffer); bufferLen = 0; } /* Copy input to temporary buffer and hash */ while (partInLen >= 128) { Buffer.InternalBlockCopy(partIn, partInBase, _buffer, 0, 128); partInBase += 128; partInLen -= 128; SHATransform(expandedBuffer, stateSHA512, buffer); } if (partInLen > 0) { Buffer.InternalBlockCopy(partIn, partInBase, _buffer, bufferLen, partInLen); } } } } } /* SHA512 finalization. Ends an SHA512 message-digest operation, writing the message digest. */ private byte[] _EndHash() { byte[] pad; int padLen; ulong bitCount; byte[] hash = new byte[64]; // HashSizeValue = 512 /* Compute padding: 80 00 00 ... 00 00*/ padLen = 128 - (int)(_count & 0x7f); if (padLen <= 16) padLen += 128; pad = new byte[padLen]; pad[0] = 0x80; // Convert count to bit count bitCount = _count * 8; // If we ever have UInt128 for bitCount, then these need to be uncommented. // Note that C# only looks at the low 6 bits of the shift value for ulongs, // so >>0 and >>64 are equal! //pad[padLen-16] = (byte) ((bitCount >> 120) & 0xff); //pad[padLen-15] = (byte) ((bitCount >> 112) & 0xff); //pad[padLen-14] = (byte) ((bitCount >> 104) & 0xff); //pad[padLen-13] = (byte) ((bitCount >> 96) & 0xff); //pad[padLen-12] = (byte) ((bitCount >> 88) & 0xff); //pad[padLen-11] = (byte) ((bitCount >> 80) & 0xff); //pad[padLen-10] = (byte) ((bitCount >> 72) & 0xff); //pad[padLen-9] = (byte) ((bitCount >> 64) & 0xff); pad[padLen-8] = (byte) ((bitCount >> 56) & 0xff); pad[padLen-7] = (byte) ((bitCount >> 48) & 0xff); pad[padLen-6] = (byte) ((bitCount >> 40) & 0xff); pad[padLen-5] = (byte) ((bitCount >> 32) & 0xff); pad[padLen-4] = (byte) ((bitCount >> 24) & 0xff); pad[padLen-3] = (byte) ((bitCount >> 16) & 0xff); pad[padLen-2] = (byte) ((bitCount >> 8) & 0xff); pad[padLen-1] = (byte) ((bitCount >> 0) & 0xff); /* Digest padding */ _HashData(pad, 0, pad.Length); /* Store digest */ Utils.QuadWordToBigEndian (hash, _stateSHA512, 8); HashValue = hash; return hash; } private readonly static UInt64[] _K = { 0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc, 0x3956c25bf348b538, 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0xd807aa98a3030242, 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, 0xc19bf174cf692694, 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, 0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, 0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f, 0xbf597fc7beef0ee4, 0xc6e00bf33da88fc2, 0xd5a79147930aa725, 0x06ca6351e003826f, 0x142929670a0e6e70, 0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df, 0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, 0x92722c851482353b, 0xa2bfe8a14cf10364, 0xa81a664bbc423001, 0xc24b8b70d0f89791, 0xc76c51a30654be30, 0xd192e819d6ef5218, 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8, 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc, 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec, 0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, 0xc67178f2e372532b, 0xca273eceea26619c, 0xd186b8c721c0c207, 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, 0x06f067aa72176fba, 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b, 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817, }; private static unsafe void SHATransform (UInt64* expandedBuffer, UInt64* state, byte* block) { UInt64 a, b, c, d, e, f, g, h; UInt64 aa, bb, cc, dd, ee, ff, hh, gg; UInt64 T1; a = state[0]; b = state[1]; c = state[2]; d = state[3]; e = state[4]; f = state[5]; g = state[6]; h = state[7]; // fill in the first 16 blocks of W. Utils.QuadWordFromBigEndian (expandedBuffer, 16, block); SHA512Expand (expandedBuffer); /* Apply the SHA512 compression function */ // We are trying to be smart here and avoid as many copies as we can // The perf gain with this method over the straightforward modify and shift // forward is >= 20%, so it's worth the pain for (int j=0; j<80; ) { T1 = h + Sigma_1(e) + Ch(e,f,g) + _K[j] + expandedBuffer[j]; ee = d + T1; aa = T1 + Sigma_0(a) + Maj(a,b,c); j++; T1 = g + Sigma_1(ee) + Ch(ee,e,f) + _K[j] + expandedBuffer[j]; ff = c + T1; bb = T1 + Sigma_0(aa) + Maj(aa,a,b); j++; T1 = f + Sigma_1(ff) + Ch(ff,ee,e) + _K[j] + expandedBuffer[j]; gg = b + T1; cc = T1 + Sigma_0(bb) + Maj(bb,aa,a); j++; T1 = e + Sigma_1(gg) + Ch(gg,ff,ee) + _K[j] + expandedBuffer[j]; hh = a + T1; dd = T1 + Sigma_0(cc) + Maj(cc,bb,aa); j++; T1 = ee + Sigma_1(hh) + Ch(hh,gg,ff) + _K[j] + expandedBuffer[j]; h = aa + T1; d = T1 + Sigma_0(dd) + Maj(dd,cc,bb); j++; T1 = ff + Sigma_1(h) + Ch(h,hh,gg) + _K[j] + expandedBuffer[j]; g = bb + T1; c = T1 + Sigma_0(d) + Maj(d,dd,cc); j++; T1 = gg + Sigma_1(g) + Ch(g,h,hh) + _K[j] + expandedBuffer[j]; f = cc + T1; b = T1 + Sigma_0(c) + Maj(c,d,dd); j++; T1 = hh + Sigma_1(f) + Ch(f,g,h) + _K[j] + expandedBuffer[j]; e = dd + T1; a = T1 + Sigma_0(b) + Maj(b,c,d); j++; } state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e; state[5] += f; state[6] += g; state[7] += h; } private static UInt64 RotateRight(UInt64 x, int n) { return (((x) >> (n)) | ((x) << (64-(n)))); } private static UInt64 Ch(UInt64 x, UInt64 y, UInt64 z) { return ((x & y) ^ ((x ^ 0xffffffffffffffff) & z)); } private static UInt64 Maj(UInt64 x, UInt64 y, UInt64 z) { return ((x & y) ^ (x & z) ^ (y & z)); } private static UInt64 Sigma_0(UInt64 x) { return (RotateRight(x,28) ^ RotateRight(x,34) ^ RotateRight(x,39)); } private static UInt64 Sigma_1(UInt64 x) { return (RotateRight(x,14) ^ RotateRight(x,18) ^ RotateRight(x,41)); } private static UInt64 sigma_0(UInt64 x) { return (RotateRight(x,1) ^ RotateRight(x,8) ^ (x >> 7)); } private static UInt64 sigma_1(UInt64 x) { return (RotateRight(x,19) ^ RotateRight(x,61) ^ (x >> 6)); } /* This function creates W_16,...,W_79 according to the formula W_j <- sigma_1(W_{j-2}) + W_{j-7} + sigma_0(W_{j-15}) + W_{j-16}; */ private static unsafe void SHA512Expand (UInt64* x) { for (int i = 16; i < 80; i++) { x[i] = sigma_1(x[i-2]) + x[i-7] + sigma_0(x[i-15]) + x[i-16]; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // SHA512Managed.cs // // C# implementation of the proposed SHA-512 hash algorithm // namespace System.Security.Cryptography { using System; [System.Runtime.InteropServices.ComVisible(true)] public class SHA512Managed : SHA512 { private byte[] _buffer; private ulong _count; // Number of bytes in the hashed message private UInt64[] _stateSHA512; private UInt64[] _W; // // public constructors // public SHA512Managed() { if (Utils.FipsAlgorithmPolicy == 1) throw new InvalidOperationException(Environment.GetResourceString("Cryptography_NonCompliantFIPSAlgorithm")); _stateSHA512 = new UInt64[8]; _buffer = new byte[128]; _W = new UInt64[80]; InitializeState(); } // // public methods // public override void Initialize() { InitializeState(); // Zeroize potentially sensitive information. Array.Clear(_buffer, 0, _buffer.Length); Array.Clear(_W, 0, _W.Length); } protected override void HashCore(byte[] rgb, int ibStart, int cbSize) { _HashData(rgb, ibStart, cbSize); } protected override byte[] HashFinal() { return _EndHash(); } // // private methods // private void InitializeState() { _count = 0; _stateSHA512[0] = 0x6a09e667f3bcc908; _stateSHA512[1] = 0xbb67ae8584caa73b; _stateSHA512[2] = 0x3c6ef372fe94f82b; _stateSHA512[3] = 0xa54ff53a5f1d36f1; _stateSHA512[4] = 0x510e527fade682d1; _stateSHA512[5] = 0x9b05688c2b3e6c1f; _stateSHA512[6] = 0x1f83d9abfb41bd6b; _stateSHA512[7] = 0x5be0cd19137e2179; } /* SHA512 block update operation. Continues an SHA message-digest operation, processing another message block, and updating the context. */ private unsafe void _HashData(byte[] partIn, int ibStart, int cbSize) { int bufferLen; int partInLen = cbSize; int partInBase = ibStart; /* Compute length of buffer */ bufferLen = (int) (_count & 0x7f); /* Update number of bytes */ _count += (ulong) partInLen; fixed (UInt64* stateSHA512 = _stateSHA512) { fixed (byte* buffer = _buffer) { fixed (UInt64* expandedBuffer = _W) { if ((bufferLen > 0) && (bufferLen + partInLen >= 128)) { Buffer.InternalBlockCopy(partIn, partInBase, _buffer, bufferLen, 128 - bufferLen); partInBase += (128 - bufferLen); partInLen -= (128 - bufferLen); SHATransform(expandedBuffer, stateSHA512, buffer); bufferLen = 0; } /* Copy input to temporary buffer and hash */ while (partInLen >= 128) { Buffer.InternalBlockCopy(partIn, partInBase, _buffer, 0, 128); partInBase += 128; partInLen -= 128; SHATransform(expandedBuffer, stateSHA512, buffer); } if (partInLen > 0) { Buffer.InternalBlockCopy(partIn, partInBase, _buffer, bufferLen, partInLen); } } } } } /* SHA512 finalization. Ends an SHA512 message-digest operation, writing the message digest. */ private byte[] _EndHash() { byte[] pad; int padLen; ulong bitCount; byte[] hash = new byte[64]; // HashSizeValue = 512 /* Compute padding: 80 00 00 ... 00 00 */ padLen = 128 - (int)(_count & 0x7f); if (padLen <= 16) padLen += 128; pad = new byte[padLen]; pad[0] = 0x80; // Convert count to bit count bitCount = _count * 8; // If we ever have UInt128 for bitCount, then these need to be uncommented. // Note that C# only looks at the low 6 bits of the shift value for ulongs, // so >>0 and >>64 are equal! //pad[padLen-16] = (byte) ((bitCount >> 120) & 0xff); //pad[padLen-15] = (byte) ((bitCount >> 112) & 0xff); //pad[padLen-14] = (byte) ((bitCount >> 104) & 0xff); //pad[padLen-13] = (byte) ((bitCount >> 96) & 0xff); //pad[padLen-12] = (byte) ((bitCount >> 88) & 0xff); //pad[padLen-11] = (byte) ((bitCount >> 80) & 0xff); //pad[padLen-10] = (byte) ((bitCount >> 72) & 0xff); //pad[padLen-9] = (byte) ((bitCount >> 64) & 0xff); pad[padLen-8] = (byte) ((bitCount >> 56) & 0xff); pad[padLen-7] = (byte) ((bitCount >> 48) & 0xff); pad[padLen-6] = (byte) ((bitCount >> 40) & 0xff); pad[padLen-5] = (byte) ((bitCount >> 32) & 0xff); pad[padLen-4] = (byte) ((bitCount >> 24) & 0xff); pad[padLen-3] = (byte) ((bitCount >> 16) & 0xff); pad[padLen-2] = (byte) ((bitCount >> 8) & 0xff); pad[padLen-1] = (byte) ((bitCount >> 0) & 0xff); /* Digest padding */ _HashData(pad, 0, pad.Length); /* Store digest */ Utils.QuadWordToBigEndian (hash, _stateSHA512, 8); HashValue = hash; return hash; } private readonly static UInt64[] _K = { 0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc, 0x3956c25bf348b538, 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0xd807aa98a3030242, 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, 0xc19bf174cf692694, 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, 0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, 0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f, 0xbf597fc7beef0ee4, 0xc6e00bf33da88fc2, 0xd5a79147930aa725, 0x06ca6351e003826f, 0x142929670a0e6e70, 0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df, 0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, 0x92722c851482353b, 0xa2bfe8a14cf10364, 0xa81a664bbc423001, 0xc24b8b70d0f89791, 0xc76c51a30654be30, 0xd192e819d6ef5218, 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8, 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc, 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec, 0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, 0xc67178f2e372532b, 0xca273eceea26619c, 0xd186b8c721c0c207, 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, 0x06f067aa72176fba, 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b, 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817, }; private static unsafe void SHATransform (UInt64* expandedBuffer, UInt64* state, byte* block) { UInt64 a, b, c, d, e, f, g, h; UInt64 aa, bb, cc, dd, ee, ff, hh, gg; UInt64 T1; a = state[0]; b = state[1]; c = state[2]; d = state[3]; e = state[4]; f = state[5]; g = state[6]; h = state[7]; // fill in the first 16 blocks of W. Utils.QuadWordFromBigEndian (expandedBuffer, 16, block); SHA512Expand (expandedBuffer); /* Apply the SHA512 compression function */ // We are trying to be smart here and avoid as many copies as we can // The perf gain with this method over the straightforward modify and shift // forward is >= 20%, so it's worth the pain for (int j=0; j<80; ) { T1 = h + Sigma_1(e) + Ch(e,f,g) + _K[j] + expandedBuffer[j]; ee = d + T1; aa = T1 + Sigma_0(a) + Maj(a,b,c); j++; T1 = g + Sigma_1(ee) + Ch(ee,e,f) + _K[j] + expandedBuffer[j]; ff = c + T1; bb = T1 + Sigma_0(aa) + Maj(aa,a,b); j++; T1 = f + Sigma_1(ff) + Ch(ff,ee,e) + _K[j] + expandedBuffer[j]; gg = b + T1; cc = T1 + Sigma_0(bb) + Maj(bb,aa,a); j++; T1 = e + Sigma_1(gg) + Ch(gg,ff,ee) + _K[j] + expandedBuffer[j]; hh = a + T1; dd = T1 + Sigma_0(cc) + Maj(cc,bb,aa); j++; T1 = ee + Sigma_1(hh) + Ch(hh,gg,ff) + _K[j] + expandedBuffer[j]; h = aa + T1; d = T1 + Sigma_0(dd) + Maj(dd,cc,bb); j++; T1 = ff + Sigma_1(h) + Ch(h,hh,gg) + _K[j] + expandedBuffer[j]; g = bb + T1; c = T1 + Sigma_0(d) + Maj(d,dd,cc); j++; T1 = gg + Sigma_1(g) + Ch(g,h,hh) + _K[j] + expandedBuffer[j]; f = cc + T1; b = T1 + Sigma_0(c) + Maj(c,d,dd); j++; T1 = hh + Sigma_1(f) + Ch(f,g,h) + _K[j] + expandedBuffer[j]; e = dd + T1; a = T1 + Sigma_0(b) + Maj(b,c,d); j++; } state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e; state[5] += f; state[6] += g; state[7] += h; } private static UInt64 RotateRight(UInt64 x, int n) { return (((x) >> (n)) | ((x) << (64-(n)))); } private static UInt64 Ch(UInt64 x, UInt64 y, UInt64 z) { return ((x & y) ^ ((x ^ 0xffffffffffffffff) & z)); } private static UInt64 Maj(UInt64 x, UInt64 y, UInt64 z) { return ((x & y) ^ (x & z) ^ (y & z)); } private static UInt64 Sigma_0(UInt64 x) { return (RotateRight(x,28) ^ RotateRight(x,34) ^ RotateRight(x,39)); } private static UInt64 Sigma_1(UInt64 x) { return (RotateRight(x,14) ^ RotateRight(x,18) ^ RotateRight(x,41)); } private static UInt64 sigma_0(UInt64 x) { return (RotateRight(x,1) ^ RotateRight(x,8) ^ (x >> 7)); } private static UInt64 sigma_1(UInt64 x) { return (RotateRight(x,19) ^ RotateRight(x,61) ^ (x >> 6)); } /* This function creates W_16,...,W_79 according to the formula W_j <- sigma_1(W_{j-2}) + W_{j-7} + sigma_0(W_{j-15}) + W_{j-16}; */ private static unsafe void SHA512Expand (UInt64* x) { for (int i = 16; i < 80; i++) { x[i] = sigma_1(x[i-2]) + x[i-7] + sigma_0(x[i-15]) + x[i-16]; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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