Added password encryption client-side using SHA256.

1 files changed, 699 insertions, 0 deletions

diff --git a/src/utils/sha2.cpp b/src/utils/sha2.cpp
new file mode 100644
index 00000000..aba6a532
--- /dev/null
+++ b/src/utils/sha2.cpp
@@ -0,0 +1,699 @@
+/*

+ *  The Mana World

+ *  Copyright 2008 The Mana World Development Team

+ *

+ *  This file is part of The Mana World.

+ *

+ *  The Mana World is free software; you can redistribute it and/or modify

+ *  it under the terms of the GNU General Public License as published by

+ *  the Free Software Foundation; either version 2 of the License, or

+ *  any later version.

+ *

+ *  The Mana World is distributed in the hope that it will be useful,

+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of

+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+ *  GNU General Public License for more details.

+ *

+ *  You should have received a copy of the GNU General Public License

+ *  along with The Mana World; if not, write to the Free Software

+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

+ *

+ *  Additional information about this file can be read below:

+ *  $Id:$

+ */

+

+/*************************************************************

+

+    This program is a C++ implementation of the Secure Hash Algorithm (SHA)

+    that handles the variations from the original 160 bit to 224, 256, 384

+    and 512 bit.  The program is intended to be platform independant and

+    has been tested on little-endian (Intel) and big-endian (Sun) machines.

+

+    This program is based on a C version written by Aaron D. Gifford

+    (as of 11/22/2004 his code could be found at http://www.adg.us/computers/sha.html).

+    Attempts to contact him were unsuccessful.  I greatly condensed his version

+    and shared as much code and data as I could think of.  I also inlined

+    a lot of code that were macros in his version.  My version detects

+    endian-ness automatically and adjusts itself accordingly.  This program

+    has been tested with Visual C++ versions 6/7 and Dev-C++ on Windows, 

+    g++ on Linux and CC on Solaris (g++ on Solaris gave a bus error).

+

+    While I did make half-hearted attempts to optimize as I went along

+    (testing on Wintel), any serious attempt at fast implementation is

+    probably going to need to make use of in-lined assembly which is not

+    very portable.

+

+    The goal of this implementation is ease of use.  As much as possible

+    I tried to hide implementation details while making it trivial to change

+    the size of the hash and get the results.  The string and charactar

+    array value of the hash is supplied as human-readable hex; the raw value

+    can also be obtained.

+

+    If you use this implementation somewhere I would like to be credited

+    with my work (a link to my page below is fine).  I add no license

+    restriction beyond any that is made by the original author.  This

+    code comes with no warrenty expressed or implied, use at your own

+    risk!

+

+    Keith Oxenrider

+    koxenrider[at]sol[dash]biotech[dot]com

+    The latest version of this code should be available via the page

+    sol-biotech.com/code.

+

+*************************************************************/

+

+#include "sha2.h"

+

+#include <iostream>

+

+using namespace std;

+

+// Hash constant words K for SHA-1:

+const sha_word32 K1_0_TO_19  = 0x5a827999UL;

+const sha_word32 K1_20_TO_39 = 0x6ed9eba1UL;

+const sha_word32 K1_40_TO_59 = 0x8f1bbcdcUL;

+const sha_word32 K1_60_TO_79 = 0xca62c1d6UL;

+

+

+

+//** SHA2 INITIAL HASH VALUES AND CONSTANTS **************************

+

+// Initial hash value H for SHA-1: 

+const static sha_word32 sha1_initial_hash_value[5] = {

+    0x67452301UL, 0xefcdab89UL, 0x98badcfeUL, 0x10325476UL,

+    0xc3d2e1f0UL

+};

+

+// Hash constant words K for SHA-224 and SHA-256: 

+const static sha_word32 K256[64] = {

+    0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,

+    0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,

+    0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,

+    0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,

+    0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,

+    0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,

+    0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,

+    0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,

+    0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,

+    0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,

+    0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,

+    0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,

+    0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,

+    0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,

+    0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,

+    0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL

+};

+

+// Initial hash value H for SHA-224: 

+const static sha_word32 sha224_initial_hash_value[8] = {

+    0xc1059ed8UL, 0x367cd507UL, 0x3070dd17UL, 0xf70e5939UL,

+    0xffc00b31UL, 0x68581511UL, 0x64f98fa7UL, 0xbefa4fa4UL

+};

+

+// Initial hash value H for SHA-256: 

+const static sha_word32 sha256_initial_hash_value[8] = {

+    0x6a09e667UL, 0xbb67ae85UL, 0x3c6ef372UL, 0xa54ff53aUL,

+    0x510e527fUL, 0x9b05688cUL, 0x1f83d9abUL, 0x5be0cd19UL

+};

+

+// ui64 Hash constant words K for SHA-384 and SHA-512: 

+#ifdef _VC6

+    const static sha_word64 K512[80] = {

+        0x428a2f98d728ae22ui64, 0x7137449123ef65cdui64,

+        0xb5c0fbcfec4d3b2fui64, 0xe9b5dba58189dbbcui64,

+        0x3956c25bf348b538ui64, 0x59f111f1b605d019ui64,

+        0x923f82a4af194f9bui64, 0xab1c5ed5da6d8118ui64,

+        0xd807aa98a3030242ui64, 0x12835b0145706fbeui64,

+        0x243185be4ee4b28cui64, 0x550c7dc3d5ffb4e2ui64,

+        0x72be5d74f27b896fui64, 0x80deb1fe3b1696b1ui64,

+        0x9bdc06a725c71235ui64, 0xc19bf174cf692694ui64,

+        0xe49b69c19ef14ad2ui64, 0xefbe4786384f25e3ui64,

+        0x0fc19dc68b8cd5b5ui64, 0x240ca1cc77ac9c65ui64,

+        0x2de92c6f592b0275ui64, 0x4a7484aa6ea6e483ui64,

+        0x5cb0a9dcbd41fbd4ui64, 0x76f988da831153b5ui64,

+        0x983e5152ee66dfabui64, 0xa831c66d2db43210ui64,

+        0xb00327c898fb213fui64, 0xbf597fc7beef0ee4ui64,

+        0xc6e00bf33da88fc2ui64, 0xd5a79147930aa725ui64,

+        0x06ca6351e003826fui64, 0x142929670a0e6e70ui64,

+        0x27b70a8546d22ffcui64, 0x2e1b21385c26c926ui64,

+        0x4d2c6dfc5ac42aedui64, 0x53380d139d95b3dfui64,

+        0x650a73548baf63deui64, 0x766a0abb3c77b2a8ui64,

+        0x81c2c92e47edaee6ui64, 0x92722c851482353bui64,

+        0xa2bfe8a14cf10364ui64, 0xa81a664bbc423001ui64,

+        0xc24b8b70d0f89791ui64, 0xc76c51a30654be30ui64,

+        0xd192e819d6ef5218ui64, 0xd69906245565a910ui64,

+        0xf40e35855771202aui64, 0x106aa07032bbd1b8ui64,

+        0x19a4c116b8d2d0c8ui64, 0x1e376c085141ab53ui64,

+        0x2748774cdf8eeb99ui64, 0x34b0bcb5e19b48a8ui64,

+        0x391c0cb3c5c95a63ui64, 0x4ed8aa4ae3418acbui64,

+        0x5b9cca4f7763e373ui64, 0x682e6ff3d6b2b8a3ui64,

+        0x748f82ee5defb2fcui64, 0x78a5636f43172f60ui64,

+        0x84c87814a1f0ab72ui64, 0x8cc702081a6439ecui64,

+        0x90befffa23631e28ui64, 0xa4506cebde82bde9ui64,

+        0xbef9a3f7b2c67915ui64, 0xc67178f2e372532bui64,

+        0xca273eceea26619cui64, 0xd186b8c721c0c207ui64,

+        0xeada7dd6cde0eb1eui64, 0xf57d4f7fee6ed178ui64,

+        0x06f067aa72176fbaui64, 0x0a637dc5a2c898a6ui64,

+        0x113f9804bef90daeui64, 0x1b710b35131c471bui64,

+        0x28db77f523047d84ui64, 0x32caab7b40c72493ui64,

+        0x3c9ebe0a15c9bebcui64, 0x431d67c49c100d4cui64,

+        0x4cc5d4becb3e42b6ui64, 0x597f299cfc657e2aui64,

+        0x5fcb6fab3ad6faecui64, 0x6c44198c4a475817ui64

+    };

+    // Initial hash value H for SHA-384 

+    const static sha_word64 sha384_initial_hash_value[8] = {

+        0xcbbb9d5dc1059ed8ui64, 0x629a292a367cd507ui64,

+        0x9159015a3070dd17ui64, 0x152fecd8f70e5939ui64,

+        0x67332667ffc00b31ui64, 0x8eb44a8768581511ui64,

+        0xdb0c2e0d64f98fa7ui64, 0x47b5481dbefa4fa4ui64

+    };

+

+    // Initial hash value H for SHA-512 

+    const static sha_word64 sha512_initial_hash_value[8] = {

+        0x6a09e667f3bcc908ui64, 0xbb67ae8584caa73bui64,

+        0x3c6ef372fe94f82bui64, 0xa54ff53a5f1d36f1ui64,

+        0x510e527fade682d1ui64, 0x9b05688c2b3e6c1fui64,

+        0x1f83d9abfb41bd6bui64, 0x5be0cd19137e2179ui64

+    };

+#else

+    const static sha_word64 K512[80] = {

+        0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,

+        0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,

+        0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,

+        0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,

+        0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,

+        0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,

+        0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,

+        0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,

+        0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,

+        0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,

+        0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,

+        0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,

+        0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,

+        0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,

+        0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,

+        0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,

+        0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,

+        0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,

+        0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,

+        0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,

+        0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,

+        0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,

+        0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,

+        0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,

+        0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,

+        0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,

+        0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,

+        0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,

+        0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,

+        0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,

+        0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,

+        0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,

+        0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,

+        0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,

+        0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,

+        0x113f9804bef90daeULL, 0x1b710b35131c471bULL,

+        0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,

+        0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,

+        0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,

+        0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL

+    };

+    // Initial hash value H for SHA-384 

+    const static sha_word64 sha384_initial_hash_value[8] = {

+        0xcbbb9d5dc1059ed8ULL, 0x629a292a367cd507ULL,

+        0x9159015a3070dd17ULL, 0x152fecd8f70e5939ULL,

+        0x67332667ffc00b31ULL, 0x8eb44a8768581511ULL,

+        0xdb0c2e0d64f98fa7ULL, 0x47b5481dbefa4fa4ULL

+    };

+

+    // Initial hash value H for SHA-512 

+    const static sha_word64 sha512_initial_hash_value[8] = {

+        0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,

+        0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,

+        0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,

+        0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL

+    };

+#endif

+

+/*

+ * Constant used by SHA224/256/384/512_End() functions for converting the

+ * digest to a readable hexadecimal character string:

+ */

+static const char *sha_hex_digits = "0123456789abcdef";

+

+

+void sha2::SHA1_Internal_Transform(const sha_word32 *data) {

+    sha_word32  a, b, c, d, e;

+    sha_word32 *state = (sha_word32*)ctx.state;

+    sha_word32  T1, T2, *W1=(sha_word32*)ctx.buffer;

+    int j;

+

+// Initialize registers with the prev. intermediate value 

+    a = state[0];

+    b = state[1];

+    c = state[2];

+    d = state[3];

+    e = state[4];

+    j = 0;

+    do {

+        if (m_boolIsBigEndian) W1[j] = *data++;

+        else REVERSE32(*data++, W1[j]);// Copy data while converting to host byte order

+        T1 = ROTL32(5, a) + Ch(b, c, d) + e + K1_0_TO_19 + W1[j];

+        e = d;

+        d = c;

+        c = ROTL32(30, b);

+        b = a;

+        a = T1;

+        j++;

+    } while (j < 16);

+

+    do {

+        T1 = W1[(j+13)&0x0f] ^ W1[(j+8)&0x0f] ^ W1[(j+2)&0x0f] ^ W1[j&0x0f];

+        if (j < 20)      T2 = Ch(b,c,d)     + K1_0_TO_19;

+        else if (j < 40) T2 = Parity(b,c,d) + K1_20_TO_39;

+        else if (j < 60) T2 = Maj(b,c,d)    + K1_40_TO_59;

+        else             T2 = Parity(b,c,d) + K1_60_TO_79;

+        T1 = ROTL32(5, a) + T2 + e + (W1[j&0x0f] = ROTL32(1, T1));

+        e = d;

+        d = c;

+        c = ROTL32(30, b);

+        b = a;

+        a = T1;

+        j++;

+    } while (j < 80);

+

+    state[0] += a;

+    state[1] += b;

+    state[2] += c;

+    state[3] += d;

+    state[4] += e;

+}

+

+

+

+///* SHA-256: ********************************************************

+

+void sha2::SHA256_Internal_Transform(const sha_word32* data) {

+    sha_word32  a, b, c, d, e, f, g, h, s0, s1;

+    sha_word32 *state = (sha_word32*)ctx.state;

+    sha_word32  T1, T2, *W256=(sha_word32*)ctx.buffer;;

+    int j;

+

+// Initialize registers with the prev. intermediate value 

+    a = state[0];

+    b = state[1];

+    c = state[2];

+    d = state[3];

+    e = state[4];

+    f = state[5];

+    g = state[6];

+    h = state[7];

+

+    j = 0;

+    do {

+        if (m_boolIsBigEndian) W256[j] = *data++;

+        else REVERSE32(*data++,W256[j]);// Copy data while converting to host byte order

+

+        T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];

+        T2 = Sigma0_256(a) + Maj(a, b, c);

+        h = g;

+        g = f;

+        f = e;

+        e = d + T1;

+        d = c;

+        c = b;

+        b = a;

+        a = T1 + T2;

+

+        j++;

+    } while (j < 16);

+

+    do {

+// Part of the message block expansion: 

+        s0 = W256[(j+1)&0x0f];

+        s0 = sigma0_256(s0);

+        s1 = W256[(j+14)&0x0f];

+        s1 = sigma1_256(s1);

+

+// Apply the SHA-256 compression function to update a..h 

+        T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +

+        (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);

+        T2 = Sigma0_256(a) + Maj(a, b, c);

+        h = g;

+        g = f;

+        f = e;

+        e = d + T1;

+        d = c;

+        c = b;

+        b = a;

+        a = T1 + T2;

+

+        j++;

+    } while (j < 64);

+

+// Compute the current intermediate hash value 

+    state[0] += a;

+    state[1] += b;

+    state[2] += c;

+    state[3] += d;

+    state[4] += e;

+    state[5] += f;

+    state[6] += g;

+    state[7] += h;

+}

+

+//** SHA-512: ********************************************************

+

+void sha2::SHA512_Internal_Transform(const sha_word64* data) {

+    sha_word64  a, b, c, d, e, f, g, h, s0, s1;

+    sha_word64 *state = (sha_word64 *)ctx.state;

+    sha_word64  T1, T2, *W512 = (sha_word64*)ctx.buffer;

+    int j;

+

+// Initialize registers with the prev. intermediate value 

+    a = state[0];

+    b = state[1];

+    c = state[2];

+    d = state[3];

+    e = state[4];

+    f = state[5];

+    g = state[6];

+    h = state[7];

+

+    j = 0;

+

+    do {

+

+        if (m_boolIsBigEndian){

+            W512[j] = *data;

+            data++;

+        }else{

+            REVERSE64(*data++, W512[j]);// copy and convert TO host byte order

+        }

+

+        T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];

+        T2 = Sigma0_512(a) + Maj(a, b, c);

+        h = g;

+        g = f;

+        f = e;

+        e = d + T1;

+        d = c;

+        c = b;

+        b = a;

+        a = T1 + T2;

+

+        j++;

+    } while (j < 16);

+

+    do {

+// Part of the message block expansion: 

+        s0 = W512[(j+1)&0x0f];

+        s0 = sigma0_512(s0);

+        s1 = W512[(j+14)&0x0f];

+        s1 =  sigma1_512(s1);

+

+// Apply the SHA-512 compression function to update a..h 

+        T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +

+        (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);

+        T2 = Sigma0_512(a) + Maj(a, b, c);

+        h = g;

+        g = f;

+        f = e;

+        e = d + T1;

+        d = c;

+        c = b;

+        b = a;

+        a = T1 + T2;

+

+        j++;

+    } while (j < 80);

+

+// Compute the current intermediate hash value 

+    state[0] += a;

+    state[1] += b;

+    state[2] += c;

+    state[3] += d;

+    state[4] += e;

+    state[5] += f;

+    state[6] += g;

+    state[7] += h;

+}

+

+

+void sha2::SHA256_Internal_Last(bool isSha1) {

+    sha_word32    usedspace;

+

+    usedspace = (sha_word32)(ctx.bitcount[0] >> 3) % 64;

+    if (usedspace == 0) {

+        MEMSET_BZERO(ctx.buffer, 56);

+        ctx.buffer[0] = 0x80;

+    }else {

+        ctx.buffer[usedspace++] = 0x80;

+        if (usedspace <= 56) {

+            MEMSET_BZERO(&ctx.buffer[usedspace], 56 - usedspace);

+        }else {

+            if (usedspace < 64) {

+                MEMSET_BZERO(&ctx.buffer[usedspace], 64 - usedspace);

+            }

+            if (isSha1) SHA1_Internal_Transform((sha_word32*)ctx.buffer);

+            else SHA256_Internal_Transform((sha_word32*)ctx.buffer);

+            MEMSET_BZERO(ctx.buffer, 56);

+        }

+    }

+

+    if (!m_boolIsBigEndian) REVERSE64(ctx.bitcount[0],ctx.bitcount[0]);

+    *(sha_word64*)&ctx.buffer[56] = ctx.bitcount[0];

+    if (isSha1) SHA1_Internal_Transform((sha_word32*)ctx.buffer);

+    else SHA256_Internal_Transform((sha_word32*)ctx.buffer);

+}

+

+

+void sha2::SHA512_Internal_Last() {

+    sha_word32    usedspace;

+

+    usedspace = (sha_word32)(ctx.bitcount[0] >> 3) % 128;

+    if (usedspace == 0) {

+        MEMSET_BZERO(ctx.buffer, 112);

+        ctx.buffer[0] = 0x80;

+    }else{

+        ctx.buffer[usedspace++] = 0x80;

+        if (usedspace <= 112) {

+            MEMSET_BZERO(&ctx.buffer[usedspace], 112 - usedspace);

+        }else {

+            if (usedspace < 128) {

+                MEMSET_BZERO(&ctx.buffer[usedspace], 128 - usedspace);

+            }

+            SHA512_Internal_Transform((sha_word64*)ctx.buffer);

+            MEMSET_BZERO(ctx.buffer, 112);

+        }

+        usedspace = 0;

+    }

+

+    if (!m_boolIsBigEndian){

+        REVERSE64(ctx.bitcount[0],ctx.bitcount[0]);

+        REVERSE64(ctx.bitcount[1],ctx.bitcount[1]);

+    }

+

+    *(sha_word64*)&ctx.buffer[112] = ctx.bitcount[1];

+    *(sha_word64*)&ctx.buffer[120] = ctx.bitcount[0];

+    SHA512_Internal_Transform((sha_word64*)ctx.buffer);

+}

+

+

+

+void sha2::SHA32bit_Update(const sha_byte *data, size_t len, bool isSha1) {

+    sha_word32 freespace, usedspace;

+    

+    if (len<1){return;}// Calling with no data is valid - we do nothing 

+

+    usedspace = (sha_word32)(ctx.bitcount[0] >> 3) % 64;

+    if (usedspace > 0) {// Calculate how much free space is available in the buffer 

+        freespace = 64 - usedspace;

+        if (len >= freespace) {// Fill the buffer completely and process it 

+            MEMCPY_BCOPY(&ctx.buffer[usedspace], data, freespace);

+            ctx.bitcount[0] += freespace << 3;

+            len -= freespace;

+            data += freespace;

+            if (isSha1) SHA1_Internal_Transform((sha_word32 *)ctx.buffer);

+            else SHA256_Internal_Transform((sha_word32 *)ctx.buffer);

+        }else {// The buffer is not yet full

+            MEMCPY_BCOPY(&ctx.buffer[usedspace], data, len);

+            ctx.bitcount[0] += len << 3;

+            return;

+        }

+    }

+    while (len >= 64) {// Process as many complete blocks as we can

+        if (isSha1) SHA1_Internal_Transform((sha_word32*)data);

+        else SHA256_Internal_Transform((sha_word32*)data);

+        ctx.bitcount[0] += 512;

+        len -= 64;

+        data += 64;

+    }

+    if (len > 0) {// There's left-overs, so save 'em

+        MEMCPY_BCOPY(&ctx.buffer, data, len);

+        ctx.bitcount[0] += len << 3;

+    }

+}

+

+

+

+void sha2::SHA64bit_Update(const sha_byte *data, size_t len) {

+    sha_word32 freespace, usedspace;

+

+    if (len < 1){return;}// Calling with no data is valid - we do nothing 

+

+    usedspace = (sha_word32)(ctx.bitcount[0] >> 3) % 128;

+    if (usedspace > 0) {// Calculate how much free space is available in the buffer 

+        freespace = 128 - usedspace;

+        if (len >= freespace) {// Fill the buffer completely and process it 

+            MEMCPY_BCOPY(&ctx.buffer[usedspace], data, freespace);

+            ADDINC128(ctx.bitcount, freespace << 3);

+            len -= freespace;

+            data += freespace;

+            SHA512_Internal_Transform((sha_word64*)ctx.buffer);

+        }else {// The buffer is not yet full 

+            MEMCPY_BCOPY(&ctx.buffer[usedspace], data, len);

+            ADDINC128(ctx.bitcount, len << 3);

+            return;

+        }

+    }

+    while (len >= 128) {// Process as many complete blocks as we can 

+        SHA512_Internal_Transform((sha_word64*)data);

+        ADDINC128(ctx.bitcount, 1024);

+        len -= 128;

+        data += 128;

+    }

+    if (len > 0) {// There's left-overs, so save 'em 

+        MEMCPY_BCOPY(ctx.buffer, data, len);

+        ADDINC128(ctx.bitcount, len << 3);

+    }

+}

+

+

+/*

+ *

+ *

+ *

+ *  Public interfaces...

+ *

+ *

+ *

+ */

+

+void sha2::Init(SHA_TYPE type){

+    m_Type = type;

+    m_boolEnded = false;

+    MEMSET_BZERO(&ctx, sizeof(SHA_CTX));

+    switch (m_Type){

+        case enuSHA1   : MEMCPY_BCOPY(ctx.state, sha1_initial_hash_value, sizeof(sha_word32) * 5); break;

+        case enuSHA224 : MEMCPY_BCOPY(ctx.state, sha224_initial_hash_value, sizeof(sha_word32) * 8); break;

+        case enuSHA256 : MEMCPY_BCOPY(ctx.state, sha256_initial_hash_value, sizeof(sha_word32) * 8); break;

+        case enuSHA384 : MEMCPY_BCOPY(ctx.state, sha384_initial_hash_value, sizeof(sha_word64) * 8); break;

+        case enuSHA512 : MEMCPY_BCOPY(ctx.state, sha512_initial_hash_value, sizeof(sha_word64) * 8); break;

+        default : throw std::runtime_error("Invalid SHA_TYPE type!");

+    }

+}

+

+

+void sha2::Update(const sha_byte* data, size_t len){

+    switch (m_Type){

+        case enuSHA1   : SHA32bit_Update(data, len, true); break;

+        case enuSHA224 : SHA32bit_Update(data, len); break;

+        case enuSHA256 : SHA32bit_Update(data, len); break;

+        case enuSHA384 : SHA64bit_Update(data, len); break;

+        case enuSHA512 : SHA64bit_Update(data, len); break;

+        default : throw std::runtime_error("Invalid SHA_TYPE type!");

+    }

+}

+

+

+void sha2::End(){

+    sha_byte *d = m_digest;

+    char *buf = m_chrHexHash;

+    int i, j, diglen, statecnt=8;

+    bool is64bit=false;

+    sha_word32 *state32=(sha_word32 *)ctx.state;

+    sha_word64 *state64=(sha_word64 *)ctx.state;

+

+    switch (m_Type){

+        case enuSHA1   : {

+            SHA256_Internal_Last(true);

+            statecnt = 5;

+            diglen = SHA1_DIGESTC_LENGTH;

+            break;

+        }

+        case enuSHA224 : {

+            SHA256_Internal_Last();

+            diglen = SHA224_DIGESTC_LENGTH;

+            break;

+        }

+        case enuSHA256 : {

+            SHA256_Internal_Last();

+            diglen = SHA256_DIGESTC_LENGTH;

+            break;

+        }

+        case enuSHA384 : {

+            SHA512_Internal_Last();

+            is64bit = true;

+            diglen = SHA384_DIGESTC_LENGTH;

+            break;

+        }

+        case enuSHA512 : {

+            SHA512_Internal_Last();

+            is64bit = true;

+            diglen = SHA512_DIGESTC_LENGTH;

+            break;

+        }

+        default : throw std::runtime_error("Invalid SHA_TYPE type!");

+    }

+    if (m_boolIsBigEndian){

+        MEMCPY_BCOPY(&m_digest, &ctx.state, diglen);

+    }else{

+        sha_byte *dp = m_digest, *ptr;

+        for (i=0; i<statecnt; i++){

+            if (is64bit) ptr = (sha_byte *)&state64[i];

+            else ptr = (sha_byte *)&state32[i];

+            for (j = is64bit ? 7 : 3; j>-1; --j) *dp++ = ptr[j];

+        }

+    }

+

+    for (i=0; i<diglen; i++) {

+        *buf++ = sha_hex_digits[(*d & 0xf0) >> 4];

+        *buf++ = sha_hex_digits[*d & 0x0f];

+        d++;

+    }

+    *buf = (char)0;

+    m_strHash = m_chrHexHash;

+    m_boolEnded = true;

+}

+

+const string &sha2::GetHash(SHA_TYPE type, const sha_byte* data, size_t len){

+    Init(type);

+    Update(data, len);

+    End();

+    return m_strHash;

+}

+

+

+

+const char *sha2::HexHash(){

+    if (!m_boolEnded) throw std::runtime_error("Unfinished execution!");

+    return m_strHash.c_str();

+}

+const string &sha2::StringHash(){

+    if (!m_boolEnded) throw std::runtime_error("Unfinished execution!");

+    return m_strHash;

+}

+const char *sha2::RawHash(int &length){

+    if (!m_boolEnded) throw std::runtime_error("Unfinished execution!");

+    switch (m_Type){

+        case enuSHA1   : length = SHA1_DIGESTC_LENGTH;   break;

+        case enuSHA224 : length = SHA224_DIGESTC_LENGTH; break;

+        case enuSHA256 : length = SHA256_DIGESTC_LENGTH; break;

+        case enuSHA384 : length = SHA384_DIGESTC_LENGTH; break;

+        case enuSHA512 : length = SHA512_DIGESTC_LENGTH; break;

+        default : length = 0;

+    }

+    return (const char *)m_digest;

+}

+