diff options
Diffstat (limited to 'security/nss/lib/freebl/alg2268.c')
| -rw-r--r-- | security/nss/lib/freebl/alg2268.c | 491 |
1 files changed, 0 insertions, 491 deletions
diff --git a/security/nss/lib/freebl/alg2268.c b/security/nss/lib/freebl/alg2268.c deleted file mode 100644 index 86e110871..000000000 --- a/security/nss/lib/freebl/alg2268.c +++ /dev/null @@ -1,491 +0,0 @@ -/* - * alg2268.c - implementation of the algorithm in RFC 2268 - * - * The contents of this file are subject to the Mozilla Public - * License Version 1.1 (the "License"); you may not use this file - * except in compliance with the License. You may obtain a copy of - * the License at http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS - * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or - * implied. See the License for the specific language governing - * rights and limitations under the License. - * - * The Original Code is the Netscape security libraries. - * - * The Initial Developer of the Original Code is Netscape - * Communications Corporation. Portions created by Netscape are - * Copyright (C) 1994-2000 Netscape Communications Corporation. All - * Rights Reserved. - * - * Contributor(s): - * - * Alternatively, the contents of this file may be used under the - * terms of the GNU General Public License Version 2 or later (the - * "GPL"), in which case the provisions of the GPL are applicable - * instead of those above. If you wish to allow use of your - * version of this file only under the terms of the GPL and not to - * allow others to use your version of this file under the MPL, - * indicate your decision by deleting the provisions above and - * replace them with the notice and other provisions required by - * the GPL. If you do not delete the provisions above, a recipient - * may use your version of this file under either the MPL or the - * GPL. - * - * $Id$ - */ - - -#include "blapi.h" -#include "secerr.h" -#ifdef XP_UNIX_XXX -#include <stddef.h> /* for ptrdiff_t */ -#endif - -/* -** RC2 symmetric block cypher -*/ - -typedef SECStatus (rc2Func)(RC2Context *cx, unsigned char *output, - const unsigned char *input, unsigned int inputLen); - -/* forward declarations */ -static rc2Func rc2_EncryptECB; -static rc2Func rc2_DecryptECB; -static rc2Func rc2_EncryptCBC; -static rc2Func rc2_DecryptCBC; - -typedef union { - PRUint32 l[2]; - PRUint16 s[4]; - PRUint8 b[8]; -} RC2Block; - -struct RC2ContextStr { - union { - PRUint8 Kb[128]; - PRUint16 Kw[64]; - } u; - RC2Block iv; - rc2Func *enc; - rc2Func *dec; -}; - -#define B u.Kb -#define K u.Kw -#define BYTESWAP(x) ((x) << 8 | (x) >> 8) -#define SWAPK(i) cx->K[i] = (tmpS = cx->K[i], BYTESWAP(tmpS)) -#define RC2_BLOCK_SIZE 8 - -#define LOAD_HARD(R) \ - R[0] = (PRUint16)input[1] << 8 | input[0]; \ - R[1] = (PRUint16)input[3] << 8 | input[2]; \ - R[2] = (PRUint16)input[5] << 8 | input[4]; \ - R[3] = (PRUint16)input[7] << 8 | input[6]; -#define LOAD_EASY(R) \ - R[0] = ((PRUint16 *)input)[0]; \ - R[1] = ((PRUint16 *)input)[1]; \ - R[2] = ((PRUint16 *)input)[2]; \ - R[3] = ((PRUint16 *)input)[3]; -#define STORE_HARD(R) \ - output[0] = (PRUint8)(R[0]); output[1] = (PRUint8)(R[0] >> 8); \ - output[2] = (PRUint8)(R[1]); output[3] = (PRUint8)(R[1] >> 8); \ - output[4] = (PRUint8)(R[2]); output[5] = (PRUint8)(R[2] >> 8); \ - output[6] = (PRUint8)(R[3]); output[7] = (PRUint8)(R[3] >> 8); -#define STORE_EASY(R) \ - ((PRUint16 *)output)[0] = R[0]; \ - ((PRUint16 *)output)[1] = R[1]; \ - ((PRUint16 *)output)[2] = R[2]; \ - ((PRUint16 *)output)[3] = R[3]; - -#if defined (_X86_) -#define LOAD(R) LOAD_EASY(R) -#define STORE(R) STORE_EASY(R) -#elif !defined(IS_LITTLE_ENDIAN) -#define LOAD(R) LOAD_HARD(R) -#define STORE(R) STORE_HARD(R) -#else -#define LOAD(R) if ((ptrdiff_t)input & 1) { LOAD_HARD(R) } else { LOAD_EASY(R) } -#define STORE(R) if ((ptrdiff_t)input & 1) { STORE_HARD(R) } else { STORE_EASY(R) } -#endif - -static const PRUint8 S[256] = { -0331,0170,0371,0304,0031,0335,0265,0355,0050,0351,0375,0171,0112,0240,0330,0235, -0306,0176,0067,0203,0053,0166,0123,0216,0142,0114,0144,0210,0104,0213,0373,0242, -0027,0232,0131,0365,0207,0263,0117,0023,0141,0105,0155,0215,0011,0201,0175,0062, -0275,0217,0100,0353,0206,0267,0173,0013,0360,0225,0041,0042,0134,0153,0116,0202, -0124,0326,0145,0223,0316,0140,0262,0034,0163,0126,0300,0024,0247,0214,0361,0334, -0022,0165,0312,0037,0073,0276,0344,0321,0102,0075,0324,0060,0243,0074,0266,0046, -0157,0277,0016,0332,0106,0151,0007,0127,0047,0362,0035,0233,0274,0224,0103,0003, -0370,0021,0307,0366,0220,0357,0076,0347,0006,0303,0325,0057,0310,0146,0036,0327, -0010,0350,0352,0336,0200,0122,0356,0367,0204,0252,0162,0254,0065,0115,0152,0052, -0226,0032,0322,0161,0132,0025,0111,0164,0113,0237,0320,0136,0004,0030,0244,0354, -0302,0340,0101,0156,0017,0121,0313,0314,0044,0221,0257,0120,0241,0364,0160,0071, -0231,0174,0072,0205,0043,0270,0264,0172,0374,0002,0066,0133,0045,0125,0227,0061, -0055,0135,0372,0230,0343,0212,0222,0256,0005,0337,0051,0020,0147,0154,0272,0311, -0323,0000,0346,0317,0341,0236,0250,0054,0143,0026,0001,0077,0130,0342,0211,0251, -0015,0070,0064,0033,0253,0063,0377,0260,0273,0110,0014,0137,0271,0261,0315,0056, -0305,0363,0333,0107,0345,0245,0234,0167,0012,0246,0040,0150,0376,0177,0301,0255 -}; - -/* -** Create a new RC2 context suitable for RC2 encryption/decryption. -** "key" raw key data -** "len" the number of bytes of key data -** "iv" is the CBC initialization vector (if mode is NSS_RC2_CBC) -** "mode" one of NSS_RC2 or NSS_RC2_CBC -** "effectiveKeyLen" in bytes, not bits. -** -** When mode is set to NSS_RC2_CBC the RC2 cipher is run in "cipher block -** chaining" mode. -*/ -RC2Context * -RC2_CreateContext(unsigned char *key, unsigned int len, - unsigned char *input, int mode, unsigned efLen8) -{ - RC2Context *cx; - PRUint8 *L,*L2; - int i; - PRUint16 tmpS; - PRUint8 tmpB; - - if (!key || len == 0 || len > (sizeof cx->B) || efLen8 > (sizeof cx->B)) { - return NULL; - } - if (mode == NSS_RC2) { - /* groovy */ - } else if (mode == NSS_RC2_CBC) { - if (!input) { - return NULL; /* not groovy */ - } - } else { - return NULL; - } - - cx = PORT_ZNew(RC2Context); - if (!cx) - return cx; - - if (mode == NSS_RC2_CBC) { - cx->enc = & rc2_EncryptCBC; - cx->dec = & rc2_DecryptCBC; - LOAD(cx->iv.s); - } else { - cx->enc = & rc2_EncryptECB; - cx->dec = & rc2_DecryptECB; - } - - /* Step 0. Copy key into table. */ - memcpy(cx->B, key, len); - - /* Step 1. Compute all values to the right of the key. */ - L2 = cx->B; - L = L2 + len; - tmpB = L[-1]; - for (i = (sizeof cx->B) - len; i > 0; --i) { - *L++ = tmpB = S[ (PRUint8)(tmpB + *L2++) ]; - } - - /* step 2. Adjust left most byte of effective key. */ - i = (sizeof cx->B) - efLen8; - L = cx->B + i; - *L = tmpB = S[*L]; /* mask is always 0xff */ - - /* step 3. Recompute all values to the left of effective key. */ - L2 = --L + efLen8; - while(L >= cx->B) { - *L-- = tmpB = S[ tmpB ^ *L2-- ]; - } - -#if !defined(IS_LITTLE_ENDIAN) - for (i = 63; i >= 0; --i) { - SWAPK(i); /* candidate for unrolling */ - } -#endif - return cx; -} - -/* -** Destroy an RC2 encryption/decryption context. -** "cx" the context -** "freeit" if PR_TRUE then free the object as well as its sub-objects -*/ -void -RC2_DestroyContext(RC2Context *cx, PRBool freeit) -{ - if (cx) { - memset(cx, 0, sizeof *cx); - if (freeit) { - PORT_Free(cx); - } - } -} - -#define ROL(x,k) (x << k | x >> (16-k)) -#define MIX(j) \ - R0 = R0 + cx->K[ 4*j+0] + (R3 & R2) + (~R3 & R1); R0 = ROL(R0,1);\ - R1 = R1 + cx->K[ 4*j+1] + (R0 & R3) + (~R0 & R2); R1 = ROL(R1,2);\ - R2 = R2 + cx->K[ 4*j+2] + (R1 & R0) + (~R1 & R3); R2 = ROL(R2,3);\ - R3 = R3 + cx->K[ 4*j+3] + (R2 & R1) + (~R2 & R0); R3 = ROL(R3,5) -#define MASH \ - R0 = R0 + cx->K[R3 & 63];\ - R1 = R1 + cx->K[R0 & 63];\ - R2 = R2 + cx->K[R1 & 63];\ - R3 = R3 + cx->K[R2 & 63] - -/* Encrypt one block */ -static void -rc2_Encrypt1Block(RC2Context *cx, RC2Block *output, RC2Block *input) -{ - register PRUint16 R0, R1, R2, R3; - - /* step 1. Initialize input. */ - R0 = input->s[0]; - R1 = input->s[1]; - R2 = input->s[2]; - R3 = input->s[3]; - - /* step 2. Expand Key (already done, in context) */ - /* step 3. j = 0 */ - /* step 4. Perform 5 mixing rounds. */ - - MIX(0); - MIX(1); - MIX(2); - MIX(3); - MIX(4); - - /* step 5. Perform 1 mashing round. */ - MASH; - - /* step 6. Perform 6 mixing rounds. */ - - MIX(5); - MIX(6); - MIX(7); - MIX(8); - MIX(9); - MIX(10); - - /* step 7. Perform 1 mashing round. */ - MASH; - - /* step 8. Perform 5 mixing rounds. */ - - MIX(11); - MIX(12); - MIX(13); - MIX(14); - MIX(15); - - /* output results */ - output->s[0] = R0; - output->s[1] = R1; - output->s[2] = R2; - output->s[3] = R3; -} - -#define ROR(x,k) (x >> k | x << (16-k)) -#define R_MIX(j) \ - R3 = ROR(R3,5); R3 = R3 - cx->K[ 4*j+3] - (R2 & R1) - (~R2 & R0); \ - R2 = ROR(R2,3); R2 = R2 - cx->K[ 4*j+2] - (R1 & R0) - (~R1 & R3); \ - R1 = ROR(R1,2); R1 = R1 - cx->K[ 4*j+1] - (R0 & R3) - (~R0 & R2); \ - R0 = ROR(R0,1); R0 = R0 - cx->K[ 4*j+0] - (R3 & R2) - (~R3 & R1) -#define R_MASH \ - R3 = R3 - cx->K[R2 & 63];\ - R2 = R2 - cx->K[R1 & 63];\ - R1 = R1 - cx->K[R0 & 63];\ - R0 = R0 - cx->K[R3 & 63] - -/* Encrypt one block */ -static void -rc2_Decrypt1Block(RC2Context *cx, RC2Block *output, RC2Block *input) -{ - register PRUint16 R0, R1, R2, R3; - - /* step 1. Initialize input. */ - R0 = input->s[0]; - R1 = input->s[1]; - R2 = input->s[2]; - R3 = input->s[3]; - - /* step 2. Expand Key (already done, in context) */ - /* step 3. j = 63 */ - /* step 4. Perform 5 r_mixing rounds. */ - R_MIX(15); - R_MIX(14); - R_MIX(13); - R_MIX(12); - R_MIX(11); - - /* step 5. Perform 1 r_mashing round. */ - R_MASH; - - /* step 6. Perform 6 r_mixing rounds. */ - R_MIX(10); - R_MIX(9); - R_MIX(8); - R_MIX(7); - R_MIX(6); - R_MIX(5); - - /* step 7. Perform 1 r_mashing round. */ - R_MASH; - - /* step 8. Perform 5 r_mixing rounds. */ - R_MIX(4); - R_MIX(3); - R_MIX(2); - R_MIX(1); - R_MIX(0); - - /* output results */ - output->s[0] = R0; - output->s[1] = R1; - output->s[2] = R2; - output->s[3] = R3; -} - -static SECStatus -rc2_EncryptECB(RC2Context *cx, unsigned char *output, - const unsigned char *input, unsigned int inputLen) -{ - RC2Block iBlock; - - while (inputLen > 0) { - LOAD(iBlock.s) - rc2_Encrypt1Block(cx, &iBlock, &iBlock); - STORE(iBlock.s) - output += RC2_BLOCK_SIZE; - input += RC2_BLOCK_SIZE; - inputLen -= RC2_BLOCK_SIZE; - } - return SECSuccess; -} - -static SECStatus -rc2_DecryptECB(RC2Context *cx, unsigned char *output, - const unsigned char *input, unsigned int inputLen) -{ - RC2Block iBlock; - - while (inputLen > 0) { - LOAD(iBlock.s) - rc2_Decrypt1Block(cx, &iBlock, &iBlock); - STORE(iBlock.s) - output += RC2_BLOCK_SIZE; - input += RC2_BLOCK_SIZE; - inputLen -= RC2_BLOCK_SIZE; - } - return SECSuccess; -} - -static SECStatus -rc2_EncryptCBC(RC2Context *cx, unsigned char *output, - const unsigned char *input, unsigned int inputLen) -{ - RC2Block iBlock; - - while (inputLen > 0) { - - LOAD(iBlock.s) - iBlock.l[0] ^= cx->iv.l[0]; - iBlock.l[1] ^= cx->iv.l[1]; - rc2_Encrypt1Block(cx, &iBlock, &iBlock); - cx->iv = iBlock; - STORE(iBlock.s) - output += RC2_BLOCK_SIZE; - input += RC2_BLOCK_SIZE; - inputLen -= RC2_BLOCK_SIZE; - } - return SECSuccess; -} - -static SECStatus -rc2_DecryptCBC(RC2Context *cx, unsigned char *output, - const unsigned char *input, unsigned int inputLen) -{ - RC2Block iBlock; - RC2Block oBlock; - - while (inputLen > 0) { - LOAD(iBlock.s) - rc2_Decrypt1Block(cx, &oBlock, &iBlock); - oBlock.l[0] ^= cx->iv.l[0]; - oBlock.l[1] ^= cx->iv.l[1]; - cx->iv = iBlock; - STORE(oBlock.s) - output += RC2_BLOCK_SIZE; - input += RC2_BLOCK_SIZE; - inputLen -= RC2_BLOCK_SIZE; - } - return SECSuccess; -} - - -/* -** Perform RC2 encryption. -** "cx" the context -** "output" the output buffer to store the encrypted data. -** "outputLen" how much data is stored in "output". Set by the routine -** after some data is stored in output. -** "maxOutputLen" the maximum amount of data that can ever be -** stored in "output" -** "input" the input data -** "inputLen" the amount of input data -*/ -SECStatus RC2_Encrypt(RC2Context *cx, unsigned char *output, - unsigned int *outputLen, unsigned int maxOutputLen, - const unsigned char *input, unsigned int inputLen) -{ - SECStatus rv = SECSuccess; - if (inputLen) { - if (inputLen % RC2_BLOCK_SIZE) { - PORT_SetError(SEC_ERROR_INPUT_LEN); - return SECFailure; - } - if (maxOutputLen < inputLen) { - PORT_SetError(SEC_ERROR_OUTPUT_LEN); - return SECFailure; - } - rv = (*cx->enc)(cx, output, input, inputLen); - } - if (rv == SECSuccess) { - *outputLen = inputLen; - } - return rv; -} - -/* -** Perform RC2 decryption. -** "cx" the context -** "output" the output buffer to store the decrypted data. -** "outputLen" how much data is stored in "output". Set by the routine -** after some data is stored in output. -** "maxOutputLen" the maximum amount of data that can ever be -** stored in "output" -** "input" the input data -** "inputLen" the amount of input data -*/ -SECStatus RC2_Decrypt(RC2Context *cx, unsigned char *output, - unsigned int *outputLen, unsigned int maxOutputLen, - const unsigned char *input, unsigned int inputLen) -{ - SECStatus rv = SECSuccess; - if (inputLen) { - if (inputLen % RC2_BLOCK_SIZE) { - PORT_SetError(SEC_ERROR_INPUT_LEN); - return SECFailure; - } - if (maxOutputLen < inputLen) { - PORT_SetError(SEC_ERROR_OUTPUT_LEN); - return SECFailure; - } - rv = (*cx->dec)(cx, output, input, inputLen); - } - if (rv == SECSuccess) { - *outputLen = inputLen; - } - return rv; -} - |