/[dtapublic]/projs/trunk/shared_source/c_datd/esrg_sha512.c
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revision 70 by dashley, Sat Oct 29 01:53:01 2016 UTC revision 71 by dashley, Sat Nov 5 11:07:06 2016 UTC
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1  //$Header$  //$Header$
2  //-------------------------------------------------------------------------------------------------  //-------------------------------------------------------------------------------------------------
3  //This file is part of "David T. Ashley's Shared Source Code", a set of shared components  //This file is part of "David T. Ashley's Shared Source Code", a set of shared components
4  //integrated into many of David T. Ashley's projects.  //integrated into many of David T. Ashley's projects.
5  //-------------------------------------------------------------------------------------------------  //-------------------------------------------------------------------------------------------------
6  //This source code and any program in which it is compiled/used is provided under the MIT License,  //This source code and any program in which it is compiled/used is provided under the MIT License,
7  //reproduced below.  //reproduced below.
8  //-------------------------------------------------------------------------------------------------  //-------------------------------------------------------------------------------------------------
9  //Permission is hereby granted, free of charge, to any person obtaining a copy of  //Permission is hereby granted, free of charge, to any person obtaining a copy of
10  //this software and associated documentation files(the "Software"), to deal in the  //this software and associated documentation files(the "Software"), to deal in the
11  //Software without restriction, including without limitation the rights to use,  //Software without restriction, including without limitation the rights to use,
12  //copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the  //copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the
13  //Software, and to permit persons to whom the Software is furnished to do so,  //Software, and to permit persons to whom the Software is furnished to do so,
14  //subject to the following conditions :  //subject to the following conditions :
15  //  //
16  //The above copyright notice and this permission notice shall be included in all  //The above copyright notice and this permission notice shall be included in all
17  //copies or substantial portions of the Software.  //copies or substantial portions of the Software.
18  //  //
19  //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20  //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21  //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE  //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
22  //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER  //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23  //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,  //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24  //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE  //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25  //SOFTWARE.  //SOFTWARE.
26  //-------------------------------------------------------------------------------------------------  //-------------------------------------------------------------------------------------------------
27  #define MODULE_ESRG_SHA512  #define MODULE_ESRG_SHA512
28    
29  #include <assert.h>  #include <assert.h>
30  #include <stddef.h>  #include <stddef.h>
31  #include <string.h>  #include <string.h>
32    
33  #include "charfunc.h"  #include "charfunc.h"
34  #include "esrg_sha512.h"  #include "esrg_sha512.h"
35    
36  //This is a right rotation macro for efficiency.  This  //This is a right rotation macro for efficiency.  This
37  //macro rotates a 64-bit quantity x right (cyclically) by  //macro rotates a 64-bit quantity x right (cyclically) by
38  //n bits.  Nomenclature from FIPS 180-3.  //n bits.  Nomenclature from FIPS 180-3.
39  #define ESRG_SHA512_FUNC_ROTR(x, n) (((x) >> (n)) | ((x) << (64-(n))))  #define ESRG_SHA512_FUNC_ROTR(x, n) (((x) >> (n)) | ((x) << (64-(n))))
40    
41  //This is a right shift macro for efficiency.  This  //This is a right shift macro for efficiency.  This
42  //macro shifts a 64-bit quantity x right by  //macro shifts a 64-bit quantity x right by
43  //n bits.  Nomenclature from FIPS 180-3.  //n bits.  Nomenclature from FIPS 180-3.
44  #define ESRG_SHA512_FUNC_SHR(x, n) ((x) >> (n))  #define ESRG_SHA512_FUNC_SHR(x, n) ((x) >> (n))
45    
46  //These functions come directly from FIPS 180-3.  //These functions come directly from FIPS 180-3.
47  #define ESRG_SHA512_FUNC_CH(x, y, z)  (((x) & (y)) ^ (~(x) & (z)))  #define ESRG_SHA512_FUNC_CH(x, y, z)  (((x) & (y)) ^ (~(x) & (z)))
48  #define ESRG_SHA512_FUNC_MAJ(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))  #define ESRG_SHA512_FUNC_MAJ(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
49  #define ESRG_SHA512_FUNC_SIGMABIG_0(x) (ESRG_SHA512_FUNC_ROTR(x, 28) ^ ESRG_SHA512_FUNC_ROTR(x, 34) ^ ESRG_SHA512_FUNC_ROTR(x, 39))  #define ESRG_SHA512_FUNC_SIGMABIG_0(x) (ESRG_SHA512_FUNC_ROTR(x, 28) ^ ESRG_SHA512_FUNC_ROTR(x, 34) ^ ESRG_SHA512_FUNC_ROTR(x, 39))
50  #define ESRG_SHA512_FUNC_SIGMABIG_1(x) (ESRG_SHA512_FUNC_ROTR(x, 14) ^ ESRG_SHA512_FUNC_ROTR(x, 18) ^ ESRG_SHA512_FUNC_ROTR(x, 41))  #define ESRG_SHA512_FUNC_SIGMABIG_1(x) (ESRG_SHA512_FUNC_ROTR(x, 14) ^ ESRG_SHA512_FUNC_ROTR(x, 18) ^ ESRG_SHA512_FUNC_ROTR(x, 41))
51  #define ESRG_SHA512_FUNC_SIGMASMALL_0(x) (ESRG_SHA512_FUNC_ROTR(x,  1) ^ ESRG_SHA512_FUNC_ROTR(x,  8) ^ ESRG_SHA512_FUNC_SHR(x,  7))  #define ESRG_SHA512_FUNC_SIGMASMALL_0(x) (ESRG_SHA512_FUNC_ROTR(x,  1) ^ ESRG_SHA512_FUNC_ROTR(x,  8) ^ ESRG_SHA512_FUNC_SHR(x,  7))
52  #define ESRG_SHA512_FUNC_SIGMASMALL_1(x) (ESRG_SHA512_FUNC_ROTR(x, 19) ^ ESRG_SHA512_FUNC_ROTR(x, 61) ^ ESRG_SHA512_FUNC_SHR(x,  6))  #define ESRG_SHA512_FUNC_SIGMASMALL_1(x) (ESRG_SHA512_FUNC_ROTR(x, 19) ^ ESRG_SHA512_FUNC_ROTR(x, 61) ^ ESRG_SHA512_FUNC_SHR(x,  6))
53    
54  //Constants, from FIPS 180-3.  //Constants, from FIPS 180-3.
55  const unsigned __int64 ESRG_SHA512_K[80] =  const unsigned __int64 ESRG_SHA512_K[80] =
56              {0x428a2f98d728ae22UL, 0x7137449123ef65cdUL,              {0x428a2f98d728ae22UL, 0x7137449123ef65cdUL,
57               0xb5c0fbcfec4d3b2fUL, 0xe9b5dba58189dbbcUL,               0xb5c0fbcfec4d3b2fUL, 0xe9b5dba58189dbbcUL,
58               0x3956c25bf348b538UL, 0x59f111f1b605d019UL,               0x3956c25bf348b538UL, 0x59f111f1b605d019UL,
59               0x923f82a4af194f9bUL, 0xab1c5ed5da6d8118UL,               0x923f82a4af194f9bUL, 0xab1c5ed5da6d8118UL,
60               0xd807aa98a3030242UL, 0x12835b0145706fbeUL,               0xd807aa98a3030242UL, 0x12835b0145706fbeUL,
61               0x243185be4ee4b28cUL, 0x550c7dc3d5ffb4e2UL,               0x243185be4ee4b28cUL, 0x550c7dc3d5ffb4e2UL,
62               0x72be5d74f27b896fUL, 0x80deb1fe3b1696b1UL,               0x72be5d74f27b896fUL, 0x80deb1fe3b1696b1UL,
63               0x9bdc06a725c71235UL, 0xc19bf174cf692694UL,               0x9bdc06a725c71235UL, 0xc19bf174cf692694UL,
64               0xe49b69c19ef14ad2UL, 0xefbe4786384f25e3UL,               0xe49b69c19ef14ad2UL, 0xefbe4786384f25e3UL,
65               0x0fc19dc68b8cd5b5UL, 0x240ca1cc77ac9c65UL,               0x0fc19dc68b8cd5b5UL, 0x240ca1cc77ac9c65UL,
66               0x2de92c6f592b0275UL, 0x4a7484aa6ea6e483UL,               0x2de92c6f592b0275UL, 0x4a7484aa6ea6e483UL,
67               0x5cb0a9dcbd41fbd4UL, 0x76f988da831153b5UL,               0x5cb0a9dcbd41fbd4UL, 0x76f988da831153b5UL,
68               0x983e5152ee66dfabUL, 0xa831c66d2db43210UL,               0x983e5152ee66dfabUL, 0xa831c66d2db43210UL,
69               0xb00327c898fb213fUL, 0xbf597fc7beef0ee4UL,               0xb00327c898fb213fUL, 0xbf597fc7beef0ee4UL,
70               0xc6e00bf33da88fc2UL, 0xd5a79147930aa725UL,               0xc6e00bf33da88fc2UL, 0xd5a79147930aa725UL,
71               0x06ca6351e003826fUL, 0x142929670a0e6e70UL,               0x06ca6351e003826fUL, 0x142929670a0e6e70UL,
72               0x27b70a8546d22ffcUL, 0x2e1b21385c26c926UL,               0x27b70a8546d22ffcUL, 0x2e1b21385c26c926UL,
73               0x4d2c6dfc5ac42aedUL, 0x53380d139d95b3dfUL,               0x4d2c6dfc5ac42aedUL, 0x53380d139d95b3dfUL,
74               0x650a73548baf63deUL, 0x766a0abb3c77b2a8UL,               0x650a73548baf63deUL, 0x766a0abb3c77b2a8UL,
75               0x81c2c92e47edaee6UL, 0x92722c851482353bUL,               0x81c2c92e47edaee6UL, 0x92722c851482353bUL,
76               0xa2bfe8a14cf10364UL, 0xa81a664bbc423001UL,               0xa2bfe8a14cf10364UL, 0xa81a664bbc423001UL,
77               0xc24b8b70d0f89791UL, 0xc76c51a30654be30UL,               0xc24b8b70d0f89791UL, 0xc76c51a30654be30UL,
78               0xd192e819d6ef5218UL, 0xd69906245565a910UL,               0xd192e819d6ef5218UL, 0xd69906245565a910UL,
79               0xf40e35855771202aUL, 0x106aa07032bbd1b8UL,               0xf40e35855771202aUL, 0x106aa07032bbd1b8UL,
80               0x19a4c116b8d2d0c8UL, 0x1e376c085141ab53UL,               0x19a4c116b8d2d0c8UL, 0x1e376c085141ab53UL,
81               0x2748774cdf8eeb99UL, 0x34b0bcb5e19b48a8UL,               0x2748774cdf8eeb99UL, 0x34b0bcb5e19b48a8UL,
82               0x391c0cb3c5c95a63UL, 0x4ed8aa4ae3418acbUL,               0x391c0cb3c5c95a63UL, 0x4ed8aa4ae3418acbUL,
83               0x5b9cca4f7763e373UL, 0x682e6ff3d6b2b8a3UL,               0x5b9cca4f7763e373UL, 0x682e6ff3d6b2b8a3UL,
84               0x748f82ee5defb2fcUL, 0x78a5636f43172f60UL,               0x748f82ee5defb2fcUL, 0x78a5636f43172f60UL,
85               0x84c87814a1f0ab72UL, 0x8cc702081a6439ecUL,               0x84c87814a1f0ab72UL, 0x8cc702081a6439ecUL,
86               0x90befffa23631e28UL, 0xa4506cebde82bde9UL,               0x90befffa23631e28UL, 0xa4506cebde82bde9UL,
87               0xbef9a3f7b2c67915UL, 0xc67178f2e372532bUL,               0xbef9a3f7b2c67915UL, 0xc67178f2e372532bUL,
88               0xca273eceea26619cUL, 0xd186b8c721c0c207UL,               0xca273eceea26619cUL, 0xd186b8c721c0c207UL,
89               0xeada7dd6cde0eb1eUL, 0xf57d4f7fee6ed178UL,               0xeada7dd6cde0eb1eUL, 0xf57d4f7fee6ed178UL,
90               0x06f067aa72176fbaUL, 0x0a637dc5a2c898a6UL,               0x06f067aa72176fbaUL, 0x0a637dc5a2c898a6UL,
91               0x113f9804bef90daeUL, 0x1b710b35131c471bUL,               0x113f9804bef90daeUL, 0x1b710b35131c471bUL,
92               0x28db77f523047d84UL, 0x32caab7b40c72493UL,               0x28db77f523047d84UL, 0x32caab7b40c72493UL,
93               0x3c9ebe0a15c9bebcUL, 0x431d67c49c100d4cUL,               0x3c9ebe0a15c9bebcUL, 0x431d67c49c100d4cUL,
94               0x4cc5d4becb3e42b6UL, 0x597f299cfc657e2aUL,               0x4cc5d4becb3e42b6UL, 0x597f299cfc657e2aUL,
95               0x5fcb6fab3ad6faecUL, 0x6c44198c4a475817UL};               0x5fcb6fab3ad6faecUL, 0x6c44198c4a475817UL};
96    
97    
98  void ESRG_SHA512_Sha512StateStructOpen(struct ESRG_SHA512_Sha512StateStruct *arg)  void ESRG_SHA512_Sha512StateStructOpen(struct ESRG_SHA512_Sha512StateStruct *arg)
99     {     {
100     assert(arg != NULL);     assert(arg != NULL);
101    
102     memset(arg, 0, sizeof(struct ESRG_SHA512_Sha512StateStruct));     memset(arg, 0, sizeof(struct ESRG_SHA512_Sha512StateStruct));
103        //Everything to zero, processed bitcount automatically set to zero.        //Everything to zero, processed bitcount automatically set to zero.
104    
105     //This assignment comes directly from FIPS 180-3.     //This assignment comes directly from FIPS 180-3.
106     arg->H0 = 0x6a09e667f3bcc908UL;     arg->H0 = 0x6a09e667f3bcc908UL;
107     arg->H1 = 0xbb67ae8584caa73bUL;     arg->H1 = 0xbb67ae8584caa73bUL;
108     arg->H2 = 0x3c6ef372fe94f82bUL;     arg->H2 = 0x3c6ef372fe94f82bUL;
109     arg->H3 = 0xa54ff53a5f1d36f1UL;     arg->H3 = 0xa54ff53a5f1d36f1UL;
110     arg->H4 = 0x510e527fade682d1UL;     arg->H4 = 0x510e527fade682d1UL;
111     arg->H5 = 0x9b05688c2b3e6c1fUL;     arg->H5 = 0x9b05688c2b3e6c1fUL;
112     arg->H6 = 0x1f83d9abfb41bd6bUL;     arg->H6 = 0x1f83d9abfb41bd6bUL;
113     arg->H7 = 0x5be0cd19137e2179UL;     arg->H7 = 0x5be0cd19137e2179UL;
114     }     }
115    
116    
117  //Copies the byte buffer to the word buffer within the state block.  //Copies the byte buffer to the word buffer within the state block.
118  //This is done in a way which hides big-endian/little-endian concerns.  //This is done in a way which hides big-endian/little-endian concerns.
119  //  //
120  static void ESRG_SHA512_CopyBytesToWords(struct ESRG_SHA512_Sha512StateStruct *arg)  static void ESRG_SHA512_CopyBytesToWords(struct ESRG_SHA512_Sha512StateStruct *arg)
121     {     {
122     unsigned int i;     unsigned int i;
123    
124     assert(arg != NULL);     assert(arg != NULL);
125    
126     //Copy the buffer contents into the words.  We need to be careful     //Copy the buffer contents into the words.  We need to be careful
127     //to do this correctly, because of big-endian/little-endian concerns.     //to do this correctly, because of big-endian/little-endian concerns.
128     //From FIPS 180-3 (alluded to, not really stated), the message is     //From FIPS 180-3 (alluded to, not really stated), the message is
129     //loaded in from M[0] down to M[15].  Additionally, per the other     //loaded in from M[0] down to M[15].  Additionally, per the other
130     //conventions in the document, the first byte is uppermost in each     //conventions in the document, the first byte is uppermost in each
131     //word.     //word.
132     for (i=0; i<16; i++)     for (i=0; i<16; i++)
133        {        {
134        assert((i * 8 + 3) < 128);        assert((i * 8 + 3) < 128);
135        arg->M[i] = (((unsigned __int64)(arg->buf[i*8+0])) << 56)        arg->M[i] = (((unsigned __int64)(arg->buf[i*8+0])) << 56)
136                    +                    +
137                    (((unsigned __int64)(arg->buf[i*8+1])) << 48)                    (((unsigned __int64)(arg->buf[i*8+1])) << 48)
138                    +                    +
139                    (((unsigned __int64)(arg->buf[i*8+2])) << 40)                    (((unsigned __int64)(arg->buf[i*8+2])) << 40)
140                    +                    +
141                    (((unsigned __int64)(arg->buf[i*8+3])) << 32)                    (((unsigned __int64)(arg->buf[i*8+3])) << 32)
142                    +                    +
143                    (((unsigned __int64)(arg->buf[i*8+4])) << 24)                    (((unsigned __int64)(arg->buf[i*8+4])) << 24)
144                    +                    +
145                    (((unsigned __int64)(arg->buf[i*8+5])) << 16)                    (((unsigned __int64)(arg->buf[i*8+5])) << 16)
146                    +                    +
147                    (((unsigned __int64)(arg->buf[i*8+6])) <<  8)                    (((unsigned __int64)(arg->buf[i*8+6])) <<  8)
148                    +                    +
149                    (((unsigned __int64)(arg->buf[i*8+7])));                    (((unsigned __int64)(arg->buf[i*8+7])));
150        }        }
151     }     }
152    
153    
154  //Copies the buffer of words into a string buffer of string length 128, and also places  //Copies the buffer of words into a string buffer of string length 128, and also places
155  //the zero terminator, which means that the string supplied by the caller must be of size  //the zero terminator, which means that the string supplied by the caller must be of size
156  //129 or larger.  //129 or larger.
157  //  //
158  static void ESRG_SHA512_CopyWordsToStringBuffer(struct ESRG_SHA512_Sha512ResultStruct *arg)  static void ESRG_SHA512_CopyWordsToStringBuffer(struct ESRG_SHA512_Sha512ResultStruct *arg)
159     {     {
160     unsigned int i, j;     unsigned int i, j;
161     unsigned char *puc;     unsigned char *puc;
162     unsigned __int64 woi;     unsigned __int64 woi;
163    
164     assert(arg != NULL);     assert(arg != NULL);
165    
166     //Copy the buffer contents into the words.  We need to be careful     //Copy the buffer contents into the words.  We need to be careful
167     //to do this correctly, because of big-endian/little-endian concerns.     //to do this correctly, because of big-endian/little-endian concerns.
168     //From FIPS 180-3 (alluded to, not really stated), the message is     //From FIPS 180-3 (alluded to, not really stated), the message is
169     //loaded in from M[0] down to M[15].  Additionally, per the other     //loaded in from M[0] down to M[15].  Additionally, per the other
170     //conventions in the document, the first byte is uppermost in each     //conventions in the document, the first byte is uppermost in each
171     //word.     //word.
172     for (i=0; i<8; i++)     for (i=0; i<8; i++)
173        {        {
174        woi = arg->sha512_words[i];        woi = arg->sha512_words[i];
175    
176            //Form a pointer to the buffer location of interest.  We work            //Form a pointer to the buffer location of interest.  We work
177            //backwards.            //backwards.
178            puc = (unsigned char *)(arg->sha512_chars) + (i * 16) + 15;            puc = (unsigned char *)(arg->sha512_chars) + (i * 16) + 15;
179    
180            //Fill in the buffer.            //Fill in the buffer.
181        for (j=0; j<16; j++)        for (j=0; j<16; j++)
182              {              {
183          *puc = (unsigned char)CHARFUNC_nibble_to_lc_hex_digit((int)(woi & 0xF));          *puc = (unsigned char)CHARFUNC_nibble_to_lc_hex_digit((int)(woi & 0xF));
184                  woi >>= 4;                  woi >>= 4;
185                  puc--;                  puc--;
186              }              }
187        }        }
188    
189     //Place the zero string terminator.     //Place the zero string terminator.
190     arg->sha512_chars[128] = 0;     arg->sha512_chars[128] = 0;
191     }     }
192    
193    
194  //Does the SHA-512 rounds as specified by FIPS 180-3.  //Does the SHA-512 rounds as specified by FIPS 180-3.
195    
196  static void ESRG_SHA512_DoSha512Rounds(struct ESRG_SHA512_Sha512StateStruct *arg)  static void ESRG_SHA512_DoSha512Rounds(struct ESRG_SHA512_Sha512StateStruct *arg)
197     {     {
198     int i;     int i;
199        //Iteration variable.        //Iteration variable.
200     unsigned __int64 T1, T2;     unsigned __int64 T1, T2;
201        //Temporary variables.  Nomenclature is from FIPS 180-3.        //Temporary variables.  Nomenclature is from FIPS 180-3.
202     unsigned __int64 M[16];     unsigned __int64 M[16];
203        //Buffer of message block to avoid repeated dereferences.        //Buffer of message block to avoid repeated dereferences.
204     unsigned __int64 H[8];     unsigned __int64 H[8];
205        //Buffer of hash state to avoid repeated dereferences.        //Buffer of hash state to avoid repeated dereferences.
206     unsigned __int64 W[80];     unsigned __int64 W[80];
207        //Working variable.  Nomenclature directly from FIPS 180-3.        //Working variable.  Nomenclature directly from FIPS 180-3.
208     unsigned __int64 a, b, c, d, e, f, g, h;     unsigned __int64 a, b, c, d, e, f, g, h;
209        //Nomenclature above directly from FIPS 180-3.        //Nomenclature above directly from FIPS 180-3.
210    
211     assert(arg != NULL);     assert(arg != NULL);
212    
213     //Copy bytes into words.     //Copy bytes into words.
214     ESRG_SHA512_CopyBytesToWords(arg);     ESRG_SHA512_CopyBytesToWords(arg);
215    
216     //Copy out the message buffer for speed.  This should avoid repeated     //Copy out the message buffer for speed.  This should avoid repeated
217     //dereferences.     //dereferences.
218     M[ 0] = arg->M[ 0];     M[ 0] = arg->M[ 0];
219     M[ 1] = arg->M[ 1];     M[ 1] = arg->M[ 1];
220     M[ 2] = arg->M[ 2];     M[ 2] = arg->M[ 2];
221     M[ 3] = arg->M[ 3];     M[ 3] = arg->M[ 3];
222     M[ 4] = arg->M[ 4];     M[ 4] = arg->M[ 4];
223     M[ 5] = arg->M[ 5];     M[ 5] = arg->M[ 5];
224     M[ 6] = arg->M[ 6];     M[ 6] = arg->M[ 6];
225     M[ 7] = arg->M[ 7];     M[ 7] = arg->M[ 7];
226     M[ 8] = arg->M[ 8];     M[ 8] = arg->M[ 8];
227     M[ 9] = arg->M[ 9];     M[ 9] = arg->M[ 9];
228     M[10] = arg->M[10];     M[10] = arg->M[10];
229     M[11] = arg->M[11];     M[11] = arg->M[11];
230     M[12] = arg->M[12];     M[12] = arg->M[12];
231     M[13] = arg->M[13];     M[13] = arg->M[13];
232     M[14] = arg->M[14];     M[14] = arg->M[14];
233     M[15] = arg->M[15];     M[15] = arg->M[15];
234    
235     //Copy out the hash state for speed.  This should avoid repeated dereferences.     //Copy out the hash state for speed.  This should avoid repeated dereferences.
236     H[0]  = arg->H0;     H[0]  = arg->H0;
237     H[1]  = arg->H1;     H[1]  = arg->H1;
238     H[2]  = arg->H2;     H[2]  = arg->H2;
239     H[3]  = arg->H3;     H[3]  = arg->H3;
240     H[4]  = arg->H4;     H[4]  = arg->H4;
241     H[5]  = arg->H5;     H[5]  = arg->H5;
242     H[6]  = arg->H6;     H[6]  = arg->H6;
243     H[7]  = arg->H7;     H[7]  = arg->H7;
244    
245     //Prepare the message schedule.  The nomenclature comes directly from FIPS 180-3.     //Prepare the message schedule.  The nomenclature comes directly from FIPS 180-3.
246     W[ 0] = M[ 0];     W[ 0] = M[ 0];
247     W[ 1] = M[ 1];     W[ 1] = M[ 1];
248     W[ 2] = M[ 2];     W[ 2] = M[ 2];
249     W[ 3] = M[ 3];     W[ 3] = M[ 3];
250     W[ 4] = M[ 4];     W[ 4] = M[ 4];
251     W[ 5] = M[ 5];     W[ 5] = M[ 5];
252     W[ 6] = M[ 6];     W[ 6] = M[ 6];
253     W[ 7] = M[ 7];     W[ 7] = M[ 7];
254     W[ 8] = M[ 8];     W[ 8] = M[ 8];
255     W[ 9] = M[ 9];     W[ 9] = M[ 9];
256     W[10] = M[10];     W[10] = M[10];
257     W[11] = M[11];     W[11] = M[11];
258     W[12] = M[12];     W[12] = M[12];
259     W[13] = M[13];     W[13] = M[13];
260     W[14] = M[14];     W[14] = M[14];
261     W[15] = M[15];     W[15] = M[15];
262    
263     for (i=16; i<80; i++)     for (i=16; i<80; i++)
264        {        {
265        W[i] =    ESRG_SHA512_FUNC_SIGMASMALL_1(W[i-2])        W[i] =    ESRG_SHA512_FUNC_SIGMASMALL_1(W[i-2])
266                       +  W[i-7]                       +  W[i-7]
267                   +  ESRG_SHA512_FUNC_SIGMASMALL_0(W[i-15])                   +  ESRG_SHA512_FUNC_SIGMASMALL_0(W[i-15])
268                           +  W[i-16];                           +  W[i-16];
269        }        }
270    
271     //Initialize the 8 working variables as specified in FIPS 180-3.     //Initialize the 8 working variables as specified in FIPS 180-3.
272     a = H[0];     a = H[0];
273     b = H[1];     b = H[1];
274     c = H[2];     c = H[2];
275     d = H[3];     d = H[3];
276     e = H[4];     e = H[4];
277     f = H[5];     f = H[5];
278     g = H[6];     g = H[6];
279     h = H[7];     h = H[7];
280    
281     //Perform the rounds as specified in FIPS 180-3.  Nomenclature below comes from     //Perform the rounds as specified in FIPS 180-3.  Nomenclature below comes from
282     //FIPS 180-3.     //FIPS 180-3.
283     for (i=0; i<80; i++)     for (i=0; i<80; i++)
284        {        {
285        T1 =    h        T1 =    h
286                      + ESRG_SHA512_FUNC_SIGMABIG_1(e)                      + ESRG_SHA512_FUNC_SIGMABIG_1(e)
287                          + ESRG_SHA512_FUNC_CH(e, f, g)                          + ESRG_SHA512_FUNC_CH(e, f, g)
288                          + ESRG_SHA512_K[i]                          + ESRG_SHA512_K[i]
289                  + W[i];                  + W[i];
290            //            //
291        T2 =    ESRG_SHA512_FUNC_SIGMABIG_0(a)        T2 =    ESRG_SHA512_FUNC_SIGMABIG_0(a)
292              + ESRG_SHA512_FUNC_MAJ(a, b, c);              + ESRG_SHA512_FUNC_MAJ(a, b, c);
293        //        //
294            h = g;            h = g;
295            //            //
296            g = f;            g = f;
297            //            //
298            f = e;            f = e;
299            //            //
300            e = d + T1;            e = d + T1;
301            //            //
302            d = c;            d = c;
303            //            //
304            c = b;            c = b;
305            //            //
306            b = a;            b = a;
307            //            //
308            a = T1 + T2;            a = T1 + T2;
309        }        }
310    
311     //Compute the next hash value.  The nomenclature comes from FIPS 180-3.     //Compute the next hash value.  The nomenclature comes from FIPS 180-3.
312     H[0] = a + H[0];     H[0] = a + H[0];
313     H[1] = b + H[1];     H[1] = b + H[1];
314     H[2] = c + H[2];     H[2] = c + H[2];
315     H[3] = d + H[3];     H[3] = d + H[3];
316     H[4] = e + H[4];     H[4] = e + H[4];
317     H[5] = f + H[5];     H[5] = f + H[5];
318     H[6] = g + H[6];     H[6] = g + H[6];
319     H[7] = h + H[7];     H[7] = h + H[7];
320    
321     //Place the local variables back in the structure.  This the only state that     //Place the local variables back in the structure.  This the only state that
322     //gets preserved between the operation of doing the rounds.     //gets preserved between the operation of doing the rounds.
323     arg->H0 = H[0];     arg->H0 = H[0];
324     arg->H1 = H[1];     arg->H1 = H[1];
325     arg->H2 = H[2];     arg->H2 = H[2];
326     arg->H3 = H[3];     arg->H3 = H[3];
327     arg->H4 = H[4];     arg->H4 = H[4];
328     arg->H5 = H[5];     arg->H5 = H[5];
329     arg->H6 = H[6];     arg->H6 = H[6];
330     arg->H7 = H[7];     arg->H7 = H[7];
331     }     }
332    
333    
334  void ESRG_SHA512_Sha512StateStructAddData(struct    ESRG_SHA512_Sha512StateStruct *arg,  void ESRG_SHA512_Sha512StateStructAddData(struct    ESRG_SHA512_Sha512StateStruct *arg,
335                                            void      *pointer_in,                                            void      *pointer_in,
336                                            unsigned  len)                                            unsigned  len)
337     {     {
338     unsigned int   low_32;     unsigned int   low_32;
339     unsigned int   byte_offset;     unsigned int   byte_offset;
340     unsigned char *data;     unsigned char *data;
341    
342     assert(arg        != NULL);     assert(arg        != NULL);
343     assert(pointer_in != NULL);     assert(pointer_in != NULL);
344    
345     data = (unsigned char *)pointer_in;     data = (unsigned char *)pointer_in;
346        //It is easier to do it this way, rather than cast all the time.        //It is easier to do it this way, rather than cast all the time.
347    
348     low_32 = (unsigned int)arg->bit_count;     low_32 = (unsigned int)arg->bit_count;
349        //Copy off the least significant bits.  Easier to do once.  We only        //Copy off the least significant bits.  Easier to do once.  We only
350        //need the 32 least significant because the block size is 0 modulo 1024.        //need the 32 least significant because the block size is 0 modulo 1024.
351    
352     byte_offset = low_32 >> 3;     byte_offset = low_32 >> 3;
353        //This gives our byte offset, up to 500+Mb or so.        //This gives our byte offset, up to 500+Mb or so.
354    
355     while(len--)     while(len--)
356        {        {
357        //We process rounds AFTER a byte is added to the buffer.  So        //We process rounds AFTER a byte is added to the buffer.  So
358        //it is always safe to add a byte first.        //it is always safe to add a byte first.
359        arg->buf[byte_offset & 0x7F] = *data;        arg->buf[byte_offset & 0x7F] = *data;
360    
361        //Nothing to do unless this was the final byte of the buffer.        //Nothing to do unless this was the final byte of the buffer.
362        if ((byte_offset & 0x7F) == 127)        if ((byte_offset & 0x7F) == 127)
363           {           {
364           ESRG_SHA512_DoSha512Rounds(arg);           ESRG_SHA512_DoSha512Rounds(arg);
365           }           }
366    
367        //Increment.        //Increment.
368        data++;        data++;
369        byte_offset++;        byte_offset++;
370        arg->bit_count += 8;        arg->bit_count += 8;
371        }        }
372     }     }
373    
374    
375  void ESRG_SHA512_Sha512StateStructClose(struct ESRG_SHA512_Sha512StateStruct  *state,  void ESRG_SHA512_Sha512StateStructClose(struct ESRG_SHA512_Sha512StateStruct  *state,
376                                          struct ESRG_SHA512_Sha512ResultStruct *result)                                          struct ESRG_SHA512_Sha512ResultStruct *result)
377     {     {
378     unsigned __int64 msglen;     unsigned __int64 msglen;
379        //Used to hold message length before we pad the message.        //Used to hold message length before we pad the message.
380     unsigned char c80 = 0x80;     unsigned char c80 = 0x80;
381        //Used to append the "1" per FIPS 180-3.        //Used to append the "1" per FIPS 180-3.
382     unsigned char c00 = 0x00;     unsigned char c00 = 0x00;
383        //Used to add 0's per FIPS 180-3.        //Used to add 0's per FIPS 180-3.
384     unsigned char  length_buf[16];     unsigned char  length_buf[16];
385        //Buffer used to form the message length and append it to the message per FIPS 180-3.        //Buffer used to form the message length and append it to the message per FIPS 180-3.
386    
387     //Be sure the input pointers aren't obviously invalid.     //Be sure the input pointers aren't obviously invalid.
388     assert(state  != NULL);     assert(state  != NULL);
389     assert(result != NULL);     assert(result != NULL);
390    
391     //Snapshot the message length.  We'll be changing it when we pad the message.     //Snapshot the message length.  We'll be changing it when we pad the message.
392     msglen = state->bit_count;     msglen = state->bit_count;
393    
394     //Add the required "1" to the end of the message, per FIPS 180-3.  Because     //Add the required "1" to the end of the message, per FIPS 180-3.  Because
395     //this software module only allows the addition of bytes (not bits), adding the     //this software module only allows the addition of bytes (not bits), adding the
396     //"1" will always involve adding the byte 0x80.     //"1" will always involve adding the byte 0x80.
397     ESRG_SHA512_Sha512StateStructAddData(state, &c80, 1);     ESRG_SHA512_Sha512StateStructAddData(state, &c80, 1);
398    
399     //Add enough 0's to the message so that we have exactly room for 16 bytes (128 bits)     //Add enough 0's to the message so that we have exactly room for 16 bytes (128 bits)
400     //of length information at the end of the message.     //of length information at the end of the message.
401     while ((state->bit_count & 0x3FF) != 896)     while ((state->bit_count & 0x3FF) != 896)
402        ESRG_SHA512_Sha512StateStructAddData(state, &c00, 1);        ESRG_SHA512_Sha512StateStructAddData(state, &c00, 1);
403    
404     //Calculate the length as a series of bytes.     //Calculate the length as a series of bytes.
405     length_buf[ 0] = 0;     length_buf[ 0] = 0;
406     length_buf[ 1] = 0;     length_buf[ 1] = 0;
407     length_buf[ 2] = 0;     length_buf[ 2] = 0;
408     length_buf[ 3] = 0;     length_buf[ 3] = 0;
409     length_buf[ 4] = 0;     length_buf[ 4] = 0;
410     length_buf[ 5] = 0;     length_buf[ 5] = 0;
411     length_buf[ 6] = 0;     length_buf[ 6] = 0;
412     length_buf[ 7] = 0;     length_buf[ 7] = 0;
413     length_buf[ 8] = (unsigned char)((msglen >> 56) & 0xFF);     length_buf[ 8] = (unsigned char)((msglen >> 56) & 0xFF);
414     length_buf[ 9] = (unsigned char)((msglen >> 48) & 0xFF);     length_buf[ 9] = (unsigned char)((msglen >> 48) & 0xFF);
415     length_buf[10] = (unsigned char)((msglen >> 40) & 0xFF);     length_buf[10] = (unsigned char)((msglen >> 40) & 0xFF);
416     length_buf[11] = (unsigned char)((msglen >> 32) & 0xFF);     length_buf[11] = (unsigned char)((msglen >> 32) & 0xFF);
417     length_buf[12] = (unsigned char)((msglen >> 24) & 0xFF);     length_buf[12] = (unsigned char)((msglen >> 24) & 0xFF);
418     length_buf[13] = (unsigned char)((msglen >> 16) & 0xFF);     length_buf[13] = (unsigned char)((msglen >> 16) & 0xFF);
419     length_buf[14] = (unsigned char)((msglen >>  8) & 0xFF);     length_buf[14] = (unsigned char)((msglen >>  8) & 0xFF);
420     length_buf[15] = (unsigned char)((msglen) & 0xFF);     length_buf[15] = (unsigned char)((msglen) & 0xFF);
421    
422     //Add the length to the message.  This should work out to generate the     //Add the length to the message.  This should work out to generate the
423     //final manipulation round.     //final manipulation round.
424     ESRG_SHA512_Sha512StateStructAddData(state, length_buf, 16);     ESRG_SHA512_Sha512StateStructAddData(state, length_buf, 16);
425    
426     //Copy the words from the state vector to the result vector.     //Copy the words from the state vector to the result vector.
427     result->sha512_words[0] = state->H0;     result->sha512_words[0] = state->H0;
428     result->sha512_words[1] = state->H1;     result->sha512_words[1] = state->H1;
429     result->sha512_words[2] = state->H2;     result->sha512_words[2] = state->H2;
430     result->sha512_words[3] = state->H3;     result->sha512_words[3] = state->H3;
431     result->sha512_words[4] = state->H4;     result->sha512_words[4] = state->H4;
432     result->sha512_words[5] = state->H5;     result->sha512_words[5] = state->H5;
433     result->sha512_words[6] = state->H6;     result->sha512_words[6] = state->H6;
434     result->sha512_words[7] = state->H7;     result->sha512_words[7] = state->H7;
435    
436     //Form a string from the hash vector.     //Form a string from the hash vector.
437     ESRG_SHA512_CopyWordsToStringBuffer(result);     ESRG_SHA512_CopyWordsToStringBuffer(result);
438    
439     //Destroy the state, which may contain sensitive information.     //Destroy the state, which may contain sensitive information.
440     //This idea came from Rivest's sample code.     //This idea came from Rivest's sample code.
441     memset(state, 0, sizeof(struct ESRG_SHA512_Sha512StateStruct));     memset(state, 0, sizeof(struct ESRG_SHA512_Sha512StateStruct));
442     }     }
443    
444    
445  //Returns version control string for file.  //Returns version control string for file.
446  //  //
447  const char *ESRG_SHA512_cvcinfo(void)  const char *ESRG_SHA512_cvcinfo(void)
448     {       {  
449     return ("$Header$");     return ("$Header$");
450     }     }
451    
452    
453  //Returns version control string for associated .H file.  //Returns version control string for associated .H file.
454  //  //
455  const char *ESRG_SHA512_hvcinfo(void)  const char *ESRG_SHA512_hvcinfo(void)
456     {       {  
457     return (ESRG_SHA512_H_VERSION);     return (ESRG_SHA512_H_VERSION);
458     }     }
459    
460  //End of esrg_sha512.c.  //End of esrg_sha512.c.

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