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Unified Diff: nss/lib/freebl/alg2268.c

Issue 2078763002: Delete bundled copy of NSS and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/nss@master
Patch Set: Delete bundled copy of NSS and replace with README. Created 4 years, 6 months ago
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Index: nss/lib/freebl/alg2268.c
diff --git a/nss/lib/freebl/alg2268.c b/nss/lib/freebl/alg2268.c
deleted file mode 100644
index ea97f52a654b34ab4ed7784227b0ad6b64072cc4..0000000000000000000000000000000000000000
--- a/nss/lib/freebl/alg2268.c
+++ /dev/null
@@ -1,485 +0,0 @@
-/*
- * alg2268.c - implementation of the algorithm in RFC 2268
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifdef FREEBL_NO_DEPEND
-#include "stubs.h"
-#endif
-
-#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 (NSS_X86_OR_X64)
-#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
-};
-
-RC2Context * RC2_AllocateContext(void)
-{
- return PORT_ZNew(RC2Context);
-}
-SECStatus
-RC2_InitContext(RC2Context *cx, const unsigned char *key, unsigned int len,
- const unsigned char *input, int mode, unsigned int efLen8,
- unsigned int unused)
-{
- PRUint8 *L,*L2;
- int i;
-#if !defined(IS_LITTLE_ENDIAN)
- PRUint16 tmpS;
-#endif
- PRUint8 tmpB;
-
- if (!key || !cx || !len || len > (sizeof cx->B) ||
- efLen8 > (sizeof cx->B)) {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
- if (mode == NSS_RC2) {
- /* groovy */
- } else if (mode == NSS_RC2_CBC) {
- if (!input) {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
- } else {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
-
- 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 SECSuccess;
-}
-
-/*
-** 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(const unsigned char *key, unsigned int len,
- const unsigned char *iv, int mode, unsigned efLen8)
-{
- RC2Context *cx = PORT_ZNew(RC2Context);
- if (cx) {
- SECStatus rv = RC2_InitContext(cx, key, len, iv, mode, efLen8, 0);
- if (rv != SECSuccess) {
- RC2_DestroyContext(cx, PR_TRUE);
- cx = NULL;
- }
- }
- 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;
-}
-
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