Xuyi Wang / wolfSSL

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wolfcrypt/src/coding.c@0:d92f9d21154c, 2015-06-26 (annotated)

Committer:
wolfSSL
Date:
Fri Jun 26 00:39:20 2015 +0000
Revision:
0:d92f9d21154c
wolfSSL 3.6.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 0:d92f9d21154c 1 /* coding.c
wolfSSL 0:d92f9d21154c 2 *
wolfSSL 0:d92f9d21154c 3 * Copyright (C) 2006-2015 wolfSSL Inc.
wolfSSL 0:d92f9d21154c 4 *
wolfSSL 0:d92f9d21154c 5 * This file is part of wolfSSL. (formerly known as CyaSSL)
wolfSSL 0:d92f9d21154c 6 *
wolfSSL 0:d92f9d21154c 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 0:d92f9d21154c 8 * it under the terms of the GNU General Public License as published by
wolfSSL 0:d92f9d21154c 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 0:d92f9d21154c 10 * (at your option) any later version.
wolfSSL 0:d92f9d21154c 11 *
wolfSSL 0:d92f9d21154c 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 0:d92f9d21154c 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 0:d92f9d21154c 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 0:d92f9d21154c 15 * GNU General Public License for more details.
wolfSSL 0:d92f9d21154c 16 *
wolfSSL 0:d92f9d21154c 17 * You should have received a copy of the GNU General Public License
wolfSSL 0:d92f9d21154c 18 * along with this program; if not, write to the Free Software
wolfSSL 0:d92f9d21154c 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
wolfSSL 0:d92f9d21154c 20 */
wolfSSL 0:d92f9d21154c 21
wolfSSL 0:d92f9d21154c 22 #ifdef HAVE_CONFIG_H
wolfSSL 0:d92f9d21154c 23 #include <config.h>
wolfSSL 0:d92f9d21154c 24 #endif
wolfSSL 0:d92f9d21154c 25
wolfSSL 0:d92f9d21154c 26 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 0:d92f9d21154c 27
wolfSSL 0:d92f9d21154c 28 #ifndef NO_CODING
wolfSSL 0:d92f9d21154c 29
wolfSSL 0:d92f9d21154c 30 #include <wolfssl/wolfcrypt/coding.h>
wolfSSL 0:d92f9d21154c 31 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 0:d92f9d21154c 32 #include <wolfssl/wolfcrypt/logging.h>
wolfSSL 0:d92f9d21154c 33
wolfSSL 0:d92f9d21154c 34
wolfSSL 0:d92f9d21154c 35 enum {
wolfSSL 0:d92f9d21154c 36 BAD = 0xFF, /* invalid encoding */
wolfSSL 0:d92f9d21154c 37 PAD = '=',
wolfSSL 0:d92f9d21154c 38 PEM_LINE_SZ = 64
wolfSSL 0:d92f9d21154c 39 };
wolfSSL 0:d92f9d21154c 40
wolfSSL 0:d92f9d21154c 41
wolfSSL 0:d92f9d21154c 42 static
wolfSSL 0:d92f9d21154c 43 const byte base64Decode[] = { 62, BAD, BAD, BAD, 63, /* + starts at 0x2B */
wolfSSL 0:d92f9d21154c 44 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
wolfSSL 0:d92f9d21154c 45 BAD, BAD, BAD, BAD, BAD, BAD, BAD,
wolfSSL 0:d92f9d21154c 46 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
wolfSSL 0:d92f9d21154c 47 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
wolfSSL 0:d92f9d21154c 48 20, 21, 22, 23, 24, 25,
wolfSSL 0:d92f9d21154c 49 BAD, BAD, BAD, BAD, BAD, BAD,
wolfSSL 0:d92f9d21154c 50 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
wolfSSL 0:d92f9d21154c 51 36, 37, 38, 39, 40, 41, 42, 43, 44, 45,
wolfSSL 0:d92f9d21154c 52 46, 47, 48, 49, 50, 51
wolfSSL 0:d92f9d21154c 53 };
wolfSSL 0:d92f9d21154c 54
wolfSSL 0:d92f9d21154c 55
wolfSSL 0:d92f9d21154c 56 int Base64_Decode(const byte* in, word32 inLen, byte* out, word32* outLen)
wolfSSL 0:d92f9d21154c 57 {
wolfSSL 0:d92f9d21154c 58 word32 i = 0;
wolfSSL 0:d92f9d21154c 59 word32 j = 0;
wolfSSL 0:d92f9d21154c 60 word32 plainSz = inLen - ((inLen + (PEM_LINE_SZ - 1)) / PEM_LINE_SZ );
wolfSSL 0:d92f9d21154c 61 const byte maxIdx = (byte)sizeof(base64Decode) + 0x2B - 1;
wolfSSL 0:d92f9d21154c 62
wolfSSL 0:d92f9d21154c 63 plainSz = (plainSz * 3 + 3) / 4;
wolfSSL 0:d92f9d21154c 64 if (plainSz > *outLen) return BAD_FUNC_ARG;
wolfSSL 0:d92f9d21154c 65
wolfSSL 0:d92f9d21154c 66 while (inLen > 3) {
wolfSSL 0:d92f9d21154c 67 byte b1, b2, b3;
wolfSSL 0:d92f9d21154c 68 byte e1 = in[j++];
wolfSSL 0:d92f9d21154c 69 byte e2 = in[j++];
wolfSSL 0:d92f9d21154c 70 byte e3 = in[j++];
wolfSSL 0:d92f9d21154c 71 byte e4 = in[j++];
wolfSSL 0:d92f9d21154c 72
wolfSSL 0:d92f9d21154c 73 int pad3 = 0;
wolfSSL 0:d92f9d21154c 74 int pad4 = 0;
wolfSSL 0:d92f9d21154c 75
wolfSSL 0:d92f9d21154c 76 if (e1 == 0) /* end file 0's */
wolfSSL 0:d92f9d21154c 77 break;
wolfSSL 0:d92f9d21154c 78 if (e3 == PAD)
wolfSSL 0:d92f9d21154c 79 pad3 = 1;
wolfSSL 0:d92f9d21154c 80 if (e4 == PAD)
wolfSSL 0:d92f9d21154c 81 pad4 = 1;
wolfSSL 0:d92f9d21154c 82
wolfSSL 0:d92f9d21154c 83 if (e1 < 0x2B || e2 < 0x2B || e3 < 0x2B || e4 < 0x2B) {
wolfSSL 0:d92f9d21154c 84 WOLFSSL_MSG("Bad Base64 Decode data, too small");
wolfSSL 0:d92f9d21154c 85 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 86 }
wolfSSL 0:d92f9d21154c 87
wolfSSL 0:d92f9d21154c 88 if (e1 > maxIdx || e2 > maxIdx || e3 > maxIdx || e4 > maxIdx) {
wolfSSL 0:d92f9d21154c 89 WOLFSSL_MSG("Bad Base64 Decode data, too big");
wolfSSL 0:d92f9d21154c 90 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 91 }
wolfSSL 0:d92f9d21154c 92
wolfSSL 0:d92f9d21154c 93 e1 = base64Decode[e1 - 0x2B];
wolfSSL 0:d92f9d21154c 94 e2 = base64Decode[e2 - 0x2B];
wolfSSL 0:d92f9d21154c 95 e3 = (e3 == PAD) ? 0 : base64Decode[e3 - 0x2B];
wolfSSL 0:d92f9d21154c 96 e4 = (e4 == PAD) ? 0 : base64Decode[e4 - 0x2B];
wolfSSL 0:d92f9d21154c 97
wolfSSL 0:d92f9d21154c 98 b1 = (byte)((e1 << 2) | (e2 >> 4));
wolfSSL 0:d92f9d21154c 99 b2 = (byte)(((e2 & 0xF) << 4) | (e3 >> 2));
wolfSSL 0:d92f9d21154c 100 b3 = (byte)(((e3 & 0x3) << 6) | e4);
wolfSSL 0:d92f9d21154c 101
wolfSSL 0:d92f9d21154c 102 out[i++] = b1;
wolfSSL 0:d92f9d21154c 103 if (!pad3)
wolfSSL 0:d92f9d21154c 104 out[i++] = b2;
wolfSSL 0:d92f9d21154c 105 if (!pad4)
wolfSSL 0:d92f9d21154c 106 out[i++] = b3;
wolfSSL 0:d92f9d21154c 107 else
wolfSSL 0:d92f9d21154c 108 break;
wolfSSL 0:d92f9d21154c 109
wolfSSL 0:d92f9d21154c 110 inLen -= 4;
wolfSSL 0:d92f9d21154c 111 if (inLen && (in[j] == ' ' || in[j] == '\r' || in[j] == '\n')) {
wolfSSL 0:d92f9d21154c 112 byte endLine = in[j++];
wolfSSL 0:d92f9d21154c 113 inLen--;
wolfSSL 0:d92f9d21154c 114 while (inLen && endLine == ' ') { /* allow trailing whitespace */
wolfSSL 0:d92f9d21154c 115 endLine = in[j++];
wolfSSL 0:d92f9d21154c 116 inLen--;
wolfSSL 0:d92f9d21154c 117 }
wolfSSL 0:d92f9d21154c 118 if (endLine == '\r') {
wolfSSL 0:d92f9d21154c 119 if (inLen) {
wolfSSL 0:d92f9d21154c 120 endLine = in[j++];
wolfSSL 0:d92f9d21154c 121 inLen--;
wolfSSL 0:d92f9d21154c 122 }
wolfSSL 0:d92f9d21154c 123 }
wolfSSL 0:d92f9d21154c 124 if (endLine != '\n') {
wolfSSL 0:d92f9d21154c 125 WOLFSSL_MSG("Bad end of line in Base64 Decode");
wolfSSL 0:d92f9d21154c 126 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 127 }
wolfSSL 0:d92f9d21154c 128 }
wolfSSL 0:d92f9d21154c 129 }
wolfSSL 0:d92f9d21154c 130 *outLen = i;
wolfSSL 0:d92f9d21154c 131
wolfSSL 0:d92f9d21154c 132 return 0;
wolfSSL 0:d92f9d21154c 133 }
wolfSSL 0:d92f9d21154c 134
wolfSSL 0:d92f9d21154c 135
wolfSSL 0:d92f9d21154c 136 #if defined(WOLFSSL_BASE64_ENCODE)
wolfSSL 0:d92f9d21154c 137
wolfSSL 0:d92f9d21154c 138 static
wolfSSL 0:d92f9d21154c 139 const byte base64Encode[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
wolfSSL 0:d92f9d21154c 140 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
wolfSSL 0:d92f9d21154c 141 'U', 'V', 'W', 'X', 'Y', 'Z',
wolfSSL 0:d92f9d21154c 142 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
wolfSSL 0:d92f9d21154c 143 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
wolfSSL 0:d92f9d21154c 144 'u', 'v', 'w', 'x', 'y', 'z',
wolfSSL 0:d92f9d21154c 145 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
wolfSSL 0:d92f9d21154c 146 '+', '/'
wolfSSL 0:d92f9d21154c 147 };
wolfSSL 0:d92f9d21154c 148
wolfSSL 0:d92f9d21154c 149
wolfSSL 0:d92f9d21154c 150 /* make sure *i (idx) won't exceed max, store and possibly escape to out,
wolfSSL 0:d92f9d21154c 151 * raw means use e w/o decode, 0 on success */
wolfSSL 0:d92f9d21154c 152 static int CEscape(int escaped, byte e, byte* out, word32* i, word32 max,
wolfSSL 0:d92f9d21154c 153 int raw)
wolfSSL 0:d92f9d21154c 154 {
wolfSSL 0:d92f9d21154c 155 int doEscape = 0;
wolfSSL 0:d92f9d21154c 156 word32 needed = 1;
wolfSSL 0:d92f9d21154c 157 word32 idx = *i;
wolfSSL 0:d92f9d21154c 158
wolfSSL 0:d92f9d21154c 159 byte basic;
wolfSSL 0:d92f9d21154c 160 byte plus = 0;
wolfSSL 0:d92f9d21154c 161 byte equals = 0;
wolfSSL 0:d92f9d21154c 162 byte newline = 0;
wolfSSL 0:d92f9d21154c 163
wolfSSL 0:d92f9d21154c 164 if (raw)
wolfSSL 0:d92f9d21154c 165 basic = e;
wolfSSL 0:d92f9d21154c 166 else
wolfSSL 0:d92f9d21154c 167 basic = base64Encode[e];
wolfSSL 0:d92f9d21154c 168
wolfSSL 0:d92f9d21154c 169 /* check whether to escape */
wolfSSL 0:d92f9d21154c 170 if (escaped) {
wolfSSL 0:d92f9d21154c 171 switch ((char)basic) {
wolfSSL 0:d92f9d21154c 172 case '+' :
wolfSSL 0:d92f9d21154c 173 plus = 1;
wolfSSL 0:d92f9d21154c 174 doEscape = 1;
wolfSSL 0:d92f9d21154c 175 needed += 2;
wolfSSL 0:d92f9d21154c 176 break;
wolfSSL 0:d92f9d21154c 177 case '=' :
wolfSSL 0:d92f9d21154c 178 equals = 1;
wolfSSL 0:d92f9d21154c 179 doEscape = 1;
wolfSSL 0:d92f9d21154c 180 needed += 2;
wolfSSL 0:d92f9d21154c 181 break;
wolfSSL 0:d92f9d21154c 182 case '\n' :
wolfSSL 0:d92f9d21154c 183 newline = 1;
wolfSSL 0:d92f9d21154c 184 doEscape = 1;
wolfSSL 0:d92f9d21154c 185 needed += 2;
wolfSSL 0:d92f9d21154c 186 break;
wolfSSL 0:d92f9d21154c 187 default:
wolfSSL 0:d92f9d21154c 188 /* do nothing */
wolfSSL 0:d92f9d21154c 189 break;
wolfSSL 0:d92f9d21154c 190 }
wolfSSL 0:d92f9d21154c 191 }
wolfSSL 0:d92f9d21154c 192
wolfSSL 0:d92f9d21154c 193 /* check size */
wolfSSL 0:d92f9d21154c 194 if ( (idx+needed) > max) {
wolfSSL 0:d92f9d21154c 195 WOLFSSL_MSG("Escape buffer max too small");
wolfSSL 0:d92f9d21154c 196 return BUFFER_E;
wolfSSL 0:d92f9d21154c 197 }
wolfSSL 0:d92f9d21154c 198
wolfSSL 0:d92f9d21154c 199 /* store it */
wolfSSL 0:d92f9d21154c 200 if (doEscape == 0) {
wolfSSL 0:d92f9d21154c 201 out[idx++] = basic;
wolfSSL 0:d92f9d21154c 202 }
wolfSSL 0:d92f9d21154c 203 else {
wolfSSL 0:d92f9d21154c 204 out[idx++] = '%'; /* start escape */
wolfSSL 0:d92f9d21154c 205
wolfSSL 0:d92f9d21154c 206 if (plus) {
wolfSSL 0:d92f9d21154c 207 out[idx++] = '2';
wolfSSL 0:d92f9d21154c 208 out[idx++] = 'B';
wolfSSL 0:d92f9d21154c 209 }
wolfSSL 0:d92f9d21154c 210 else if (equals) {
wolfSSL 0:d92f9d21154c 211 out[idx++] = '3';
wolfSSL 0:d92f9d21154c 212 out[idx++] = 'D';
wolfSSL 0:d92f9d21154c 213 }
wolfSSL 0:d92f9d21154c 214 else if (newline) {
wolfSSL 0:d92f9d21154c 215 out[idx++] = '0';
wolfSSL 0:d92f9d21154c 216 out[idx++] = 'A';
wolfSSL 0:d92f9d21154c 217 }
wolfSSL 0:d92f9d21154c 218
wolfSSL 0:d92f9d21154c 219 }
wolfSSL 0:d92f9d21154c 220 *i = idx;
wolfSSL 0:d92f9d21154c 221
wolfSSL 0:d92f9d21154c 222 return 0;
wolfSSL 0:d92f9d21154c 223 }
wolfSSL 0:d92f9d21154c 224
wolfSSL 0:d92f9d21154c 225
wolfSSL 0:d92f9d21154c 226 /* internal worker, handles both escaped and normal line endings */
wolfSSL 0:d92f9d21154c 227 static int DoBase64_Encode(const byte* in, word32 inLen, byte* out,
wolfSSL 0:d92f9d21154c 228 word32* outLen, int escaped)
wolfSSL 0:d92f9d21154c 229 {
wolfSSL 0:d92f9d21154c 230 int ret = 0;
wolfSSL 0:d92f9d21154c 231 word32 i = 0,
wolfSSL 0:d92f9d21154c 232 j = 0,
wolfSSL 0:d92f9d21154c 233 n = 0; /* new line counter */
wolfSSL 0:d92f9d21154c 234
wolfSSL 0:d92f9d21154c 235 word32 outSz = (inLen + 3 - 1) / 3 * 4;
wolfSSL 0:d92f9d21154c 236 word32 addSz = (outSz + PEM_LINE_SZ - 1) / PEM_LINE_SZ; /* new lines */
wolfSSL 0:d92f9d21154c 237
wolfSSL 0:d92f9d21154c 238 if (escaped)
wolfSSL 0:d92f9d21154c 239 addSz *= 3; /* instead of just \n, we're doing %0A triplet */
wolfSSL 0:d92f9d21154c 240
wolfSSL 0:d92f9d21154c 241 outSz += addSz;
wolfSSL 0:d92f9d21154c 242
wolfSSL 0:d92f9d21154c 243 /* if escaped we can't predetermine size for one pass encoding, but
wolfSSL 0:d92f9d21154c 244 * make sure we have enough if no escapes are in input */
wolfSSL 0:d92f9d21154c 245 if (outSz > *outLen) return BAD_FUNC_ARG;
wolfSSL 0:d92f9d21154c 246
wolfSSL 0:d92f9d21154c 247 while (inLen > 2) {
wolfSSL 0:d92f9d21154c 248 byte b1 = in[j++];
wolfSSL 0:d92f9d21154c 249 byte b2 = in[j++];
wolfSSL 0:d92f9d21154c 250 byte b3 = in[j++];
wolfSSL 0:d92f9d21154c 251
wolfSSL 0:d92f9d21154c 252 /* encoded idx */
wolfSSL 0:d92f9d21154c 253 byte e1 = b1 >> 2;
wolfSSL 0:d92f9d21154c 254 byte e2 = (byte)(((b1 & 0x3) << 4) | (b2 >> 4));
wolfSSL 0:d92f9d21154c 255 byte e3 = (byte)(((b2 & 0xF) << 2) | (b3 >> 6));
wolfSSL 0:d92f9d21154c 256 byte e4 = b3 & 0x3F;
wolfSSL 0:d92f9d21154c 257
wolfSSL 0:d92f9d21154c 258 /* store */
wolfSSL 0:d92f9d21154c 259 ret = CEscape(escaped, e1, out, &i, *outLen, 0);
wolfSSL 0:d92f9d21154c 260 if (ret != 0) break;
wolfSSL 0:d92f9d21154c 261 ret = CEscape(escaped, e2, out, &i, *outLen, 0);
wolfSSL 0:d92f9d21154c 262 if (ret != 0) break;
wolfSSL 0:d92f9d21154c 263 ret = CEscape(escaped, e3, out, &i, *outLen, 0);
wolfSSL 0:d92f9d21154c 264 if (ret != 0) break;
wolfSSL 0:d92f9d21154c 265 ret = CEscape(escaped, e4, out, &i, *outLen, 0);
wolfSSL 0:d92f9d21154c 266 if (ret != 0) break;
wolfSSL 0:d92f9d21154c 267
wolfSSL 0:d92f9d21154c 268 inLen -= 3;
wolfSSL 0:d92f9d21154c 269
wolfSSL 0:d92f9d21154c 270 if ((++n % (PEM_LINE_SZ / 4)) == 0 && inLen) {
wolfSSL 0:d92f9d21154c 271 ret = CEscape(escaped, '\n', out, &i, *outLen, 1);
wolfSSL 0:d92f9d21154c 272 if (ret != 0) break;
wolfSSL 0:d92f9d21154c 273 }
wolfSSL 0:d92f9d21154c 274 }
wolfSSL 0:d92f9d21154c 275
wolfSSL 0:d92f9d21154c 276 /* last integral */
wolfSSL 0:d92f9d21154c 277 if (inLen && ret == 0) {
wolfSSL 0:d92f9d21154c 278 int twoBytes = (inLen == 2);
wolfSSL 0:d92f9d21154c 279
wolfSSL 0:d92f9d21154c 280 byte b1 = in[j++];
wolfSSL 0:d92f9d21154c 281 byte b2 = (twoBytes) ? in[j++] : 0;
wolfSSL 0:d92f9d21154c 282
wolfSSL 0:d92f9d21154c 283 byte e1 = b1 >> 2;
wolfSSL 0:d92f9d21154c 284 byte e2 = (byte)(((b1 & 0x3) << 4) | (b2 >> 4));
wolfSSL 0:d92f9d21154c 285 byte e3 = (byte)((b2 & 0xF) << 2);
wolfSSL 0:d92f9d21154c 286
wolfSSL 0:d92f9d21154c 287 ret = CEscape(escaped, e1, out, &i, *outLen, 0);
wolfSSL 0:d92f9d21154c 288 if (ret == 0)
wolfSSL 0:d92f9d21154c 289 ret = CEscape(escaped, e2, out, &i, *outLen, 0);
wolfSSL 0:d92f9d21154c 290 if (ret == 0) {
wolfSSL 0:d92f9d21154c 291 /* third */
wolfSSL 0:d92f9d21154c 292 if (twoBytes)
wolfSSL 0:d92f9d21154c 293 ret = CEscape(escaped, e3, out, &i, *outLen, 0);
wolfSSL 0:d92f9d21154c 294 else
wolfSSL 0:d92f9d21154c 295 ret = CEscape(escaped, '=', out, &i, *outLen, 1);
wolfSSL 0:d92f9d21154c 296 }
wolfSSL 0:d92f9d21154c 297 /* fourth always pad */
wolfSSL 0:d92f9d21154c 298 if (ret == 0)
wolfSSL 0:d92f9d21154c 299 ret = CEscape(escaped, '=', out, &i, *outLen, 1);
wolfSSL 0:d92f9d21154c 300 }
wolfSSL 0:d92f9d21154c 301
wolfSSL 0:d92f9d21154c 302 if (ret == 0)
wolfSSL 0:d92f9d21154c 303 ret = CEscape(escaped, '\n', out, &i, *outLen, 1);
wolfSSL 0:d92f9d21154c 304
wolfSSL 0:d92f9d21154c 305 if (i != outSz && escaped == 0 && ret == 0)
wolfSSL 0:d92f9d21154c 306 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 307
wolfSSL 0:d92f9d21154c 308 *outLen = i;
wolfSSL 0:d92f9d21154c 309 return ret;
wolfSSL 0:d92f9d21154c 310 }
wolfSSL 0:d92f9d21154c 311
wolfSSL 0:d92f9d21154c 312
wolfSSL 0:d92f9d21154c 313 /* Base64 Encode, PEM style, with \n line endings */
wolfSSL 0:d92f9d21154c 314 int Base64_Encode(const byte* in, word32 inLen, byte* out, word32* outLen)
wolfSSL 0:d92f9d21154c 315 {
wolfSSL 0:d92f9d21154c 316 return DoBase64_Encode(in, inLen, out, outLen, 0);
wolfSSL 0:d92f9d21154c 317 }
wolfSSL 0:d92f9d21154c 318
wolfSSL 0:d92f9d21154c 319
wolfSSL 0:d92f9d21154c 320 /* Base64 Encode, with %0A esacped line endings instead of \n */
wolfSSL 0:d92f9d21154c 321 int Base64_EncodeEsc(const byte* in, word32 inLen, byte* out, word32* outLen)
wolfSSL 0:d92f9d21154c 322 {
wolfSSL 0:d92f9d21154c 323 return DoBase64_Encode(in, inLen, out, outLen, 1);
wolfSSL 0:d92f9d21154c 324 }
wolfSSL 0:d92f9d21154c 325
wolfSSL 0:d92f9d21154c 326
wolfSSL 0:d92f9d21154c 327 #endif /* defined(WOLFSSL_BASE64_ENCODE) */
wolfSSL 0:d92f9d21154c 328
wolfSSL 0:d92f9d21154c 329
wolfSSL 0:d92f9d21154c 330 #if defined(OPENSSL_EXTRA) || defined(HAVE_WEBSERVER) || defined(HAVE_FIPS)
wolfSSL 0:d92f9d21154c 331
wolfSSL 0:d92f9d21154c 332 static
wolfSSL 0:d92f9d21154c 333 const byte hexDecode[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
wolfSSL 0:d92f9d21154c 334 BAD, BAD, BAD, BAD, BAD, BAD, BAD,
wolfSSL 0:d92f9d21154c 335 10, 11, 12, 13, 14, 15, /* upper case A-F */
wolfSSL 0:d92f9d21154c 336 BAD, BAD, BAD, BAD, BAD, BAD, BAD, BAD,
wolfSSL 0:d92f9d21154c 337 BAD, BAD, BAD, BAD, BAD, BAD, BAD, BAD,
wolfSSL 0:d92f9d21154c 338 BAD, BAD, BAD, BAD, BAD, BAD, BAD, BAD,
wolfSSL 0:d92f9d21154c 339 BAD, BAD, /* G - ` */
wolfSSL 0:d92f9d21154c 340 10, 11, 12, 13, 14, 15 /* lower case a-f */
wolfSSL 0:d92f9d21154c 341 }; /* A starts at 0x41 not 0x3A */
wolfSSL 0:d92f9d21154c 342
wolfSSL 0:d92f9d21154c 343 int Base16_Decode(const byte* in, word32 inLen, byte* out, word32* outLen)
wolfSSL 0:d92f9d21154c 344 {
wolfSSL 0:d92f9d21154c 345 word32 inIdx = 0;
wolfSSL 0:d92f9d21154c 346 word32 outIdx = 0;
wolfSSL 0:d92f9d21154c 347
wolfSSL 0:d92f9d21154c 348 if (inLen == 1 && *outLen && in) {
wolfSSL 0:d92f9d21154c 349 byte b = in[inIdx++] - 0x30; /* 0 starts at 0x30 */
wolfSSL 0:d92f9d21154c 350
wolfSSL 0:d92f9d21154c 351 /* sanity check */
wolfSSL 0:d92f9d21154c 352 if (b >= sizeof(hexDecode)/sizeof(hexDecode[0]))
wolfSSL 0:d92f9d21154c 353 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 354
wolfSSL 0:d92f9d21154c 355 b = hexDecode[b];
wolfSSL 0:d92f9d21154c 356
wolfSSL 0:d92f9d21154c 357 if (b == BAD)
wolfSSL 0:d92f9d21154c 358 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 359
wolfSSL 0:d92f9d21154c 360 out[outIdx++] = b;
wolfSSL 0:d92f9d21154c 361
wolfSSL 0:d92f9d21154c 362 *outLen = outIdx;
wolfSSL 0:d92f9d21154c 363 return 0;
wolfSSL 0:d92f9d21154c 364 }
wolfSSL 0:d92f9d21154c 365
wolfSSL 0:d92f9d21154c 366 if (inLen % 2)
wolfSSL 0:d92f9d21154c 367 return BAD_FUNC_ARG;
wolfSSL 0:d92f9d21154c 368
wolfSSL 0:d92f9d21154c 369 if (*outLen < (inLen / 2))
wolfSSL 0:d92f9d21154c 370 return BAD_FUNC_ARG;
wolfSSL 0:d92f9d21154c 371
wolfSSL 0:d92f9d21154c 372 while (inLen) {
wolfSSL 0:d92f9d21154c 373 byte b = in[inIdx++] - 0x30; /* 0 starts at 0x30 */
wolfSSL 0:d92f9d21154c 374 byte b2 = in[inIdx++] - 0x30;
wolfSSL 0:d92f9d21154c 375
wolfSSL 0:d92f9d21154c 376 /* sanity checks */
wolfSSL 0:d92f9d21154c 377 if (b >= sizeof(hexDecode)/sizeof(hexDecode[0]))
wolfSSL 0:d92f9d21154c 378 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 379 if (b2 >= sizeof(hexDecode)/sizeof(hexDecode[0]))
wolfSSL 0:d92f9d21154c 380 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 381
wolfSSL 0:d92f9d21154c 382 b = hexDecode[b];
wolfSSL 0:d92f9d21154c 383 b2 = hexDecode[b2];
wolfSSL 0:d92f9d21154c 384
wolfSSL 0:d92f9d21154c 385 if (b == BAD || b2 == BAD)
wolfSSL 0:d92f9d21154c 386 return ASN_INPUT_E;
wolfSSL 0:d92f9d21154c 387
wolfSSL 0:d92f9d21154c 388 out[outIdx++] = (byte)((b << 4) | b2);
wolfSSL 0:d92f9d21154c 389 inLen -= 2;
wolfSSL 0:d92f9d21154c 390 }
wolfSSL 0:d92f9d21154c 391
wolfSSL 0:d92f9d21154c 392 *outLen = outIdx;
wolfSSL 0:d92f9d21154c 393 return 0;
wolfSSL 0:d92f9d21154c 394 }
wolfSSL 0:d92f9d21154c 395
wolfSSL 0:d92f9d21154c 396
wolfSSL 0:d92f9d21154c 397 #endif /* (OPENSSL_EXTRA) || (HAVE_WEBSERVER) || (HAVE_FIPS) */
wolfSSL 0:d92f9d21154c 398
wolfSSL 0:d92f9d21154c 399 #endif /* NO_CODING */
wolfSSL 0:d92f9d21154c 400