mirror of
https://github.com/rn10950/RetroZilla.git
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301 lines
7.9 KiB
C
301 lines
7.9 KiB
C
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape security libraries.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1994-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifdef FREEBL_NO_DEPEND
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#include "stubs.h"
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#endif
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#include "prerr.h"
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#include "secerr.h"
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#include "prtypes.h"
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#include "blapi.h"
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#define MD2_DIGEST_LEN 16
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#define MD2_BUFSIZE 16
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#define MD2_X_SIZE 48 /* The X array, [CV | INPUT | TMP VARS] */
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#define MD2_CV 0 /* index into X for chaining variables */
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#define MD2_INPUT 16 /* index into X for input */
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#define MD2_TMPVARS 32 /* index into X for temporary variables */
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#define MD2_CHECKSUM_SIZE 16
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struct MD2ContextStr {
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unsigned char checksum[MD2_BUFSIZE];
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unsigned char X[MD2_X_SIZE];
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PRUint8 unusedBuffer;
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};
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static const PRUint8 MD2S[256] = {
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0051, 0056, 0103, 0311, 0242, 0330, 0174, 0001,
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0075, 0066, 0124, 0241, 0354, 0360, 0006, 0023,
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0142, 0247, 0005, 0363, 0300, 0307, 0163, 0214,
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0230, 0223, 0053, 0331, 0274, 0114, 0202, 0312,
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0036, 0233, 0127, 0074, 0375, 0324, 0340, 0026,
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0147, 0102, 0157, 0030, 0212, 0027, 0345, 0022,
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0276, 0116, 0304, 0326, 0332, 0236, 0336, 0111,
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0240, 0373, 0365, 0216, 0273, 0057, 0356, 0172,
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0251, 0150, 0171, 0221, 0025, 0262, 0007, 0077,
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0224, 0302, 0020, 0211, 0013, 0042, 0137, 0041,
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0200, 0177, 0135, 0232, 0132, 0220, 0062, 0047,
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0065, 0076, 0314, 0347, 0277, 0367, 0227, 0003,
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0377, 0031, 0060, 0263, 0110, 0245, 0265, 0321,
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0327, 0136, 0222, 0052, 0254, 0126, 0252, 0306,
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0117, 0270, 0070, 0322, 0226, 0244, 0175, 0266,
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0166, 0374, 0153, 0342, 0234, 0164, 0004, 0361,
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0105, 0235, 0160, 0131, 0144, 0161, 0207, 0040,
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0206, 0133, 0317, 0145, 0346, 0055, 0250, 0002,
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0033, 0140, 0045, 0255, 0256, 0260, 0271, 0366,
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0034, 0106, 0141, 0151, 0064, 0100, 0176, 0017,
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0125, 0107, 0243, 0043, 0335, 0121, 0257, 0072,
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0303, 0134, 0371, 0316, 0272, 0305, 0352, 0046,
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0054, 0123, 0015, 0156, 0205, 0050, 0204, 0011,
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0323, 0337, 0315, 0364, 0101, 0201, 0115, 0122,
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0152, 0334, 0067, 0310, 0154, 0301, 0253, 0372,
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0044, 0341, 0173, 0010, 0014, 0275, 0261, 0112,
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0170, 0210, 0225, 0213, 0343, 0143, 0350, 0155,
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0351, 0313, 0325, 0376, 0073, 0000, 0035, 0071,
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0362, 0357, 0267, 0016, 0146, 0130, 0320, 0344,
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0246, 0167, 0162, 0370, 0353, 0165, 0113, 0012,
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0061, 0104, 0120, 0264, 0217, 0355, 0037, 0032,
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0333, 0231, 0215, 0063, 0237, 0021, 0203, 0024
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};
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SECStatus
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MD2_Hash(unsigned char *dest, const char *src)
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{
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unsigned int len;
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MD2Context *cx = MD2_NewContext();
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if (!cx) {
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PORT_SetError(PR_OUT_OF_MEMORY_ERROR);
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return SECFailure;
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}
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MD2_Begin(cx);
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MD2_Update(cx, (const unsigned char *)src, PORT_Strlen(src));
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MD2_End(cx, dest, &len, MD2_DIGEST_LEN);
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MD2_DestroyContext(cx, PR_TRUE);
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return SECSuccess;
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}
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MD2Context *
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MD2_NewContext(void)
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{
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MD2Context *cx = (MD2Context *)PORT_ZAlloc(sizeof(MD2Context));
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if (cx == NULL) {
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PORT_SetError(PR_OUT_OF_MEMORY_ERROR);
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return NULL;
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}
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return cx;
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}
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void
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MD2_DestroyContext(MD2Context *cx, PRBool freeit)
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{
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if (freeit)
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PORT_ZFree(cx, sizeof(*cx));
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}
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void
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MD2_Begin(MD2Context *cx)
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{
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memset(cx, 0, sizeof(*cx));
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cx->unusedBuffer = MD2_BUFSIZE;
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}
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static void
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md2_compress(MD2Context *cx)
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{
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int j;
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unsigned char P;
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P = cx->checksum[MD2_CHECKSUM_SIZE-1];
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/* Compute the running checksum, and set the tmp variables to be
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* CV[i] XOR input[i]
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*/
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#define CKSUMFN(n) \
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P = cx->checksum[n] ^ MD2S[cx->X[MD2_INPUT+n] ^ P]; \
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cx->checksum[n] = P; \
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cx->X[MD2_TMPVARS+n] = cx->X[n] ^ cx->X[MD2_INPUT+n];
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CKSUMFN(0);
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CKSUMFN(1);
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CKSUMFN(2);
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CKSUMFN(3);
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CKSUMFN(4);
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CKSUMFN(5);
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CKSUMFN(6);
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CKSUMFN(7);
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CKSUMFN(8);
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CKSUMFN(9);
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CKSUMFN(10);
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CKSUMFN(11);
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CKSUMFN(12);
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CKSUMFN(13);
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CKSUMFN(14);
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CKSUMFN(15);
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/* The compression function. */
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#define COMPRESS(n) \
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P = cx->X[n] ^ MD2S[P]; \
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cx->X[n] = P;
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P = 0x00;
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for (j=0; j<18; j++) {
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COMPRESS(0);
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COMPRESS(1);
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COMPRESS(2);
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COMPRESS(3);
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COMPRESS(4);
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COMPRESS(5);
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COMPRESS(6);
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COMPRESS(7);
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COMPRESS(8);
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COMPRESS(9);
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COMPRESS(10);
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COMPRESS(11);
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COMPRESS(12);
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COMPRESS(13);
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COMPRESS(14);
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COMPRESS(15);
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COMPRESS(16);
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COMPRESS(17);
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COMPRESS(18);
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COMPRESS(19);
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COMPRESS(20);
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COMPRESS(21);
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COMPRESS(22);
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COMPRESS(23);
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COMPRESS(24);
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COMPRESS(25);
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COMPRESS(26);
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COMPRESS(27);
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COMPRESS(28);
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COMPRESS(29);
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COMPRESS(30);
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COMPRESS(31);
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COMPRESS(32);
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COMPRESS(33);
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COMPRESS(34);
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COMPRESS(35);
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COMPRESS(36);
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COMPRESS(37);
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COMPRESS(38);
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COMPRESS(39);
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COMPRESS(40);
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COMPRESS(41);
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COMPRESS(42);
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COMPRESS(43);
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COMPRESS(44);
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COMPRESS(45);
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COMPRESS(46);
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COMPRESS(47);
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P = (P + j) % 256;
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}
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cx->unusedBuffer = MD2_BUFSIZE;
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}
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void
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MD2_Update(MD2Context *cx, const unsigned char *input, unsigned int inputLen)
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{
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PRUint32 bytesToConsume;
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/* Fill the remaining input buffer. */
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if (cx->unusedBuffer != MD2_BUFSIZE) {
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bytesToConsume = PR_MIN(inputLen, cx->unusedBuffer);
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memcpy(&cx->X[MD2_INPUT + (MD2_BUFSIZE - cx->unusedBuffer)],
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input, bytesToConsume);
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if (cx->unusedBuffer + bytesToConsume >= MD2_BUFSIZE)
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md2_compress(cx);
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inputLen -= bytesToConsume;
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input += bytesToConsume;
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}
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/* Iterate over 16-byte chunks of the input. */
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while (inputLen >= MD2_BUFSIZE) {
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memcpy(&cx->X[MD2_INPUT], input, MD2_BUFSIZE);
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md2_compress(cx);
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inputLen -= MD2_BUFSIZE;
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input += MD2_BUFSIZE;
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}
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/* Copy any input that remains into the buffer. */
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if (inputLen)
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memcpy(&cx->X[MD2_INPUT], input, inputLen);
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cx->unusedBuffer = MD2_BUFSIZE - inputLen;
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}
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void
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MD2_End(MD2Context *cx, unsigned char *digest,
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unsigned int *digestLen, unsigned int maxDigestLen)
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{
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PRUint8 padStart;
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if (maxDigestLen < MD2_BUFSIZE) {
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PORT_SetError(SEC_ERROR_INVALID_ARGS);
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return;
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}
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padStart = MD2_BUFSIZE - cx->unusedBuffer;
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memset(&cx->X[MD2_INPUT + padStart], cx->unusedBuffer,
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cx->unusedBuffer);
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md2_compress(cx);
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memcpy(&cx->X[MD2_INPUT], cx->checksum, MD2_BUFSIZE);
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md2_compress(cx);
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*digestLen = MD2_DIGEST_LEN;
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memcpy(digest, &cx->X[MD2_CV], MD2_DIGEST_LEN);
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}
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unsigned int
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MD2_FlattenSize(MD2Context *cx)
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{
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return sizeof(*cx);
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}
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SECStatus
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MD2_Flatten(MD2Context *cx, unsigned char *space)
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{
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memcpy(space, cx, sizeof(*cx));
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return SECSuccess;
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}
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MD2Context *
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MD2_Resurrect(unsigned char *space, void *arg)
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{
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MD2Context *cx = MD2_NewContext();
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if (cx)
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memcpy(cx, space, sizeof(*cx));
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return cx;
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}
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void MD2_Clone(MD2Context *dest, MD2Context *src)
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{
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memcpy(dest, src, sizeof *dest);
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}
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