| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* GATE PROJECT LICENSE: | ||
| 2 | +----------------------------------------------------------------------------+ | ||
| 3 | | Copyright (c) 2018-2026, Stefan Meislinger <sm@opengate.at> | | ||
| 4 | | All rights reserved. | | ||
| 5 | | | | ||
| 6 | | Redistribution and use in source and binary forms, with or without | | ||
| 7 | | modification, are permitted provided that the following conditions are met:| | ||
| 8 | | | | ||
| 9 | | 1. Redistributions of source code must retain the above copyright notice, | | ||
| 10 | | this list of conditions and the following disclaimer. | | ||
| 11 | | 2. Redistributions in binary form must reproduce the above copyright | | ||
| 12 | | notice, this list of conditions and the following disclaimer in the | | ||
| 13 | | documentation and/or other materials provided with the distribution. | | ||
| 14 | | | | ||
| 15 | | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"| | ||
| 16 | | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | | ||
| 17 | | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | | ||
| 18 | | ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | | ||
| 19 | | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | | ||
| 20 | | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | | ||
| 21 | | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | | ||
| 22 | | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | | ||
| 23 | | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | | ||
| 24 | | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | | ||
| 25 | | THE POSSIBILITY OF SUCH DAMAGE. | | ||
| 26 | +----------------------------------------------------------------------------+ | ||
| 27 | */ | ||
| 28 | |||
| 29 | #include "gate/encode/base64.h" | ||
| 30 | #include "gate/strings.h" | ||
| 31 | #include "gate/results.h" | ||
| 32 | #include "gate/debugging.h" | ||
| 33 | |||
| 34 | static char const* const base64_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; | ||
| 35 | static char const base64_nullchar = '='; | ||
| 36 | |||
| 37 | 84 | void gate_base64_enc3(char const* inputTriple, char* outputQuad) | |
| 38 | { | ||
| 39 | 84 | outputQuad[0] = base64_chars[((gate_uint8_t)inputTriple[0] >> 2) & 0x3f]; | |
| 40 | 84 | outputQuad[1] = base64_chars[(((gate_uint8_t)inputTriple[0] & 0x03) << 4) | (((gate_uint8_t)inputTriple[1] >> 4) & 0x0f)]; | |
| 41 | 84 | outputQuad[2] = base64_chars[(((gate_uint8_t)inputTriple[1] & 0x0f) << 2) | (((gate_uint8_t)inputTriple[2] >> 6) & 0x03)]; | |
| 42 | 84 | outputQuad[3] = base64_chars[(gate_uint8_t)inputTriple[2] & 0x3f]; | |
| 43 | 84 | } | |
| 44 | |||
| 45 | 6 | void gate_base64_enc2(char const* inputTuple, char* outputQuad) | |
| 46 | { | ||
| 47 | 6 | outputQuad[0] = base64_chars[((gate_uint8_t)inputTuple[0] >> 2) & 0x3f]; | |
| 48 | 6 | outputQuad[1] = base64_chars[(((gate_uint8_t)inputTuple[0] & 0x03) << 4) | (((gate_uint8_t)inputTuple[1] >> 4) & 0x0f)]; | |
| 49 | 6 | outputQuad[2] = base64_chars[((gate_uint8_t)inputTuple[1] & 0x0f) << 2]; | |
| 50 | 6 | outputQuad[3] = base64_nullchar; | |
| 51 | 6 | } | |
| 52 | |||
| 53 | 3 | void gate_base64_enc1(char const* inputByte, char* outputQuad) | |
| 54 | { | ||
| 55 | 3 | outputQuad[0] = base64_chars[((gate_uint8_t)inputByte[0] >> 2) & 0x3f]; | |
| 56 | 3 | outputQuad[1] = base64_chars[((gate_uint8_t)inputByte[0] & 0x3) << 4]; | |
| 57 | 3 | outputQuad[2] = base64_nullchar; | |
| 58 | 3 | outputQuad[3] = base64_nullchar; | |
| 59 | 3 | } | |
| 60 | |||
| 61 | 60 | gate_size_t gate_base64_dec(char const* inputQuad, char* outputTriple) | |
| 62 | { | ||
| 63 | 60 | gate_size_t pos1 = gate_str_char_pos(base64_chars, 64, inputQuad[0], 0); | |
| 64 | 60 | gate_size_t pos2 = gate_str_char_pos(base64_chars, 64, inputQuad[1], 0); | |
| 65 | 60 | gate_size_t pos3 = gate_str_char_pos(base64_chars, 64, inputQuad[2], 0); | |
| 66 | 60 | gate_size_t pos4 = gate_str_char_pos(base64_chars, 64, inputQuad[3], 0); | |
| 67 | 60 | gate_size_t ret = 0; | |
| 68 | 60 | gate_uint32_t quad = 0; | |
| 69 | |||
| 70 | do | ||
| 71 | { | ||
| 72 |
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60 | if (pos1 == GATE_STR_NPOS) |
| 73 | { | ||
| 74 | ✗ | break; | |
| 75 | } | ||
| 76 | 60 | quad |= (gate_uint32_t)pos1 << 18; | |
| 77 | |||
| 78 |
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60 | if (pos2 == GATE_STR_NPOS) |
| 79 | { | ||
| 80 | ✗ | break; | |
| 81 | } | ||
| 82 | 60 | quad |= (gate_uint32_t)pos2 << 12; | |
| 83 | 60 | outputTriple[0] = (char)(gate_uint8_t)((quad >> 16) & 0xff); | |
| 84 | 60 | ++ret; | |
| 85 | |||
| 86 |
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60 | if (pos3 == GATE_STR_NPOS) |
| 87 | { | ||
| 88 | 3 | break; | |
| 89 | } | ||
| 90 | 57 | quad |= (gate_uint32_t)pos3 << 6; | |
| 91 | 57 | outputTriple[1] = (char)(gate_uint8_t)((quad >> 8) & 0xff); | |
| 92 | 57 | ++ret; | |
| 93 | |||
| 94 |
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57 | if (pos4 == GATE_STR_NPOS) |
| 95 | { | ||
| 96 | 3 | break; | |
| 97 | } | ||
| 98 | 54 | quad |= (gate_uint32_t)pos4; | |
| 99 | 54 | outputTriple[2] = (char)(gate_uint8_t)(quad & 0xff); | |
| 100 | 54 | ++ret; | |
| 101 | |||
| 102 | } while (0); | ||
| 103 | |||
| 104 | 60 | return ret; | |
| 105 | } | ||
| 106 | |||
| 107 | |||
| 108 | 5 | gate_result_t gate_base64_encode(gate_string_t const* src, gate_strbuilder_t* dst) | |
| 109 | { | ||
| 110 | 5 | gate_result_t ret = GATE_RESULT_OK; | |
| 111 | 5 | char const* ptr = src->str; | |
| 112 | 5 | gate_size_t len = src->length; | |
| 113 | char buffer[4]; | ||
| 114 | |||
| 115 |
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53 | while (len >= 3) |
| 116 | { | ||
| 117 | 48 | gate_base64_enc3(ptr, buffer); | |
| 118 |
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48 | if (4 != gate_strbuilder_append_text(dst, buffer, 4)) |
| 119 | { | ||
| 120 | ✗ | ret = GATE_RESULT_OUTOFMEMORY; | |
| 121 | ✗ | break; | |
| 122 | } | ||
| 123 | 48 | len -= 3; | |
| 124 | 48 | ptr += 3; | |
| 125 | } | ||
| 126 |
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5 | if (GATE_SUCCEEDED(ret)) |
| 127 | { | ||
| 128 |
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5 | if (len == 1) |
| 129 | { | ||
| 130 | 1 | gate_base64_enc1(ptr, buffer); | |
| 131 |
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1 | if (4 != gate_strbuilder_append_text(dst, buffer, 4)) |
| 132 | { | ||
| 133 | ✗ | ret = GATE_RESULT_OUTOFMEMORY; | |
| 134 | } | ||
| 135 | } | ||
| 136 |
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5 | if (len == 2) |
| 137 | { | ||
| 138 | 4 | gate_base64_enc2(ptr, buffer); | |
| 139 |
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4 | if (4 != gate_strbuilder_append_text(dst, buffer, 4)) |
| 140 | { | ||
| 141 | ✗ | ret = GATE_RESULT_OUTOFMEMORY; | |
| 142 | } | ||
| 143 | } | ||
| 144 | } | ||
| 145 | |||
| 146 | 5 | return ret; | |
| 147 | } | ||
| 148 | 4 | gate_result_t gate_base64_encode_stream(gate_stream_t* src, gate_stream_t* dst) | |
| 149 | { | ||
| 150 | gate_result_t ret; | ||
| 151 | char srcbuffer[GATE_MAX_COPYBUFFER_LENGTH * 3 / 4]; | ||
| 152 | char dstbuffer[GATE_MAX_COPYBUFFER_LENGTH]; | ||
| 153 | gate_size_t returned; | ||
| 154 | gate_size_t converted; | ||
| 155 | gate_size_t written; | ||
| 156 | |||
| 157 | for (;;) | ||
| 158 | 2 | { | |
| 159 | 4 | char const* ptrsrc = srcbuffer; | |
| 160 | 4 | char* ptrdst = dstbuffer; | |
| 161 | 4 | ret = gate_stream_read_block(src, srcbuffer, sizeof(srcbuffer), &returned); | |
| 162 |
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4 | if (GATE_FAILED(ret)) |
| 163 | { | ||
| 164 | ✗ | break; | |
| 165 | } | ||
| 166 |
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4 | if (returned == 0) |
| 167 | { | ||
| 168 | 2 | break; | |
| 169 | } | ||
| 170 | 2 | converted = 0; | |
| 171 |
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20 | while (returned >= 3) |
| 172 | { | ||
| 173 | 18 | gate_base64_enc3(ptrsrc, ptrdst); | |
| 174 | 18 | ptrsrc += 3; | |
| 175 | 18 | returned -= 3; | |
| 176 | 18 | ptrdst += 4; | |
| 177 | 18 | converted += 4; | |
| 178 | } | ||
| 179 |
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2 | if (returned == 1) |
| 180 | { | ||
| 181 | 1 | gate_base64_enc1(ptrsrc, ptrdst); | |
| 182 | 1 | converted += 4; | |
| 183 | } | ||
| 184 |
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2 | if (returned == 2) |
| 185 | { | ||
| 186 | 1 | gate_base64_enc2(ptrsrc, ptrdst); | |
| 187 | 1 | converted += 4; | |
| 188 | } | ||
| 189 | |||
| 190 | 2 | ret = gate_stream_write_block(dst, dstbuffer, converted, &written); | |
| 191 |
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2 | if (GATE_FAILED(ret)) |
| 192 | { | ||
| 193 | ✗ | break; | |
| 194 | } | ||
| 195 | } | ||
| 196 | |||
| 197 | 2 | return ret; | |
| 198 | } | ||
| 199 | |||
| 200 | 2 | gate_result_t gate_base64_encode_buffer(char const* src, gate_size_t srclength, char* dst, gate_size_t* dstlength) | |
| 201 | { | ||
| 202 | gate_result_t ret; | ||
| 203 | 2 | gate_size_t b64length = (srclength / 3) * 4; | |
| 204 | 2 | char const* ptrsrc = src; | |
| 205 | 2 | char* ptrdst = dst; | |
| 206 | |||
| 207 | do | ||
| 208 | { | ||
| 209 |
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2 | if ((srclength == 0) || (dstlength == NULL)) |
| 210 | { | ||
| 211 | ✗ | ret = GATE_RESULT_INVALIDARG; | |
| 212 | ✗ | break; | |
| 213 | } | ||
| 214 |
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2 | if ((srclength % 3) != 0) |
| 215 | { | ||
| 216 | 2 | b64length += 4; | |
| 217 | } | ||
| 218 |
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2 | if (*dstlength < b64length) |
| 219 | { | ||
| 220 | ✗ | ret = GATE_RESULT_BUFFERTOOSMALL; | |
| 221 | ✗ | *dstlength = b64length; | |
| 222 | ✗ | break; | |
| 223 | } | ||
| 224 | 2 | *dstlength = b64length; | |
| 225 |
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2 | if ((src == NULL) || (dst == NULL)) |
| 226 | { | ||
| 227 | ✗ | ret = GATE_RESULT_INVALIDARG; | |
| 228 | ✗ | break; | |
| 229 | } | ||
| 230 | |||
| 231 |
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20 | while (srclength >= 3) |
| 232 | { | ||
| 233 | 18 | gate_base64_enc3(ptrsrc, ptrdst); | |
| 234 | 18 | ptrsrc += 3; | |
| 235 | 18 | srclength -= 3; | |
| 236 | 18 | ptrdst += 4; | |
| 237 | } | ||
| 238 |
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2 | if (srclength == 1) |
| 239 | { | ||
| 240 | 1 | gate_base64_enc1(ptrsrc, ptrdst); | |
| 241 | } | ||
| 242 |
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1 | else if (srclength == 2) |
| 243 | { | ||
| 244 | 1 | gate_base64_enc2(ptrsrc, ptrdst); | |
| 245 | } | ||
| 246 | 2 | ret = GATE_RESULT_OK; | |
| 247 | } while (0); | ||
| 248 | |||
| 249 | 2 | return ret; | |
| 250 | } | ||
| 251 | |||
| 252 | |||
| 253 | 2 | static gate_size_t gate_base64_decode_block(char const* src, gate_size_t srclength, char* dst, gate_size_t dstlength) | |
| 254 | { | ||
| 255 | 2 | gate_size_t ret = 0; | |
| 256 | gate_size_t tmp; | ||
| 257 | |||
| 258 |
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22 | while ((srclength >= 4) && (dstlength >= 3)) |
| 259 | { | ||
| 260 | 20 | tmp = gate_base64_dec(src, dst); | |
| 261 |
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20 | if (tmp == 0) |
| 262 | { | ||
| 263 | ✗ | break; | |
| 264 | } | ||
| 265 | 20 | ret += tmp; | |
| 266 | 20 | src += 4; | |
| 267 | 20 | srclength -= 4; | |
| 268 | 20 | dst += tmp; | |
| 269 | 20 | dstlength -= tmp; | |
| 270 | } | ||
| 271 | |||
| 272 | 2 | return ret; | |
| 273 | } | ||
| 274 | |||
| 275 | 2 | gate_result_t gate_base64_decode(gate_string_t const* src, gate_strbuilder_t* dst) | |
| 276 | { | ||
| 277 | gate_result_t ret; | ||
| 278 | char const* ptrsrc; | ||
| 279 | gate_size_t length; | ||
| 280 | |||
| 281 |
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2 | GATE_DEBUG_ASSERT(src != NULL); |
| 282 |
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2 | GATE_DEBUG_ASSERT(dst != NULL); |
| 283 | |||
| 284 | 2 | ptrsrc = src->str; | |
| 285 | 2 | length = src->length; | |
| 286 | |||
| 287 |
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2 | if ((length % 4) != 0) |
| 288 | { | ||
| 289 | ✗ | ret = GATE_RESULT_INVALIDINPUT; | |
| 290 | } | ||
| 291 | else | ||
| 292 | { | ||
| 293 | 2 | ret = GATE_RESULT_OK; | |
| 294 |
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20 | while (length != 0) |
| 295 | { | ||
| 296 | char buffer[3]; | ||
| 297 | 20 | gate_size_t declength = gate_base64_dec(ptrsrc, buffer); | |
| 298 |
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20 | if (declength == 0) |
| 299 | { | ||
| 300 | ✗ | ret = GATE_RESULT_INVALIDINPUT; | |
| 301 | 2 | break; | |
| 302 | } | ||
| 303 | 20 | length -= 4; | |
| 304 | 20 | ptrsrc += 4; | |
| 305 |
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20 | if (declength != gate_strbuilder_append_text(dst, buffer, declength)) |
| 306 | { | ||
| 307 | ✗ | ret = GATE_RESULT_OUTOFMEMORY; | |
| 308 | ✗ | break; | |
| 309 | } | ||
| 310 |
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20 | if (declength < 3) |
| 311 | { | ||
| 312 | 2 | break; | |
| 313 | } | ||
| 314 | } | ||
| 315 | } | ||
| 316 | |||
| 317 | 2 | return ret; | |
| 318 | } | ||
| 319 | 2 | gate_result_t gate_base64_decode_stream(gate_stream_t* src, gate_stream_t* dst) | |
| 320 | { | ||
| 321 | 2 | gate_result_t ret = GATE_RESULT_OK; | |
| 322 | char srcbuffer[GATE_MAX_COPYBUFFER_LENGTH]; | ||
| 323 | char dstbuffer[GATE_MAX_COPYBUFFER_LENGTH * 3 / 4]; | ||
| 324 | gate_size_t returned; | ||
| 325 | gate_size_t converted; | ||
| 326 | gate_size_t written; | ||
| 327 | |||
| 328 |
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4 | while (GATE_SUCCEEDED(ret)) |
| 329 | { | ||
| 330 | 4 | ret = gate_stream_read_block(src, srcbuffer, sizeof(srcbuffer), &returned); | |
| 331 |
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4 | if (GATE_FAILED(ret)) |
| 332 | { | ||
| 333 | ✗ | break; | |
| 334 | } | ||
| 335 |
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4 | if (returned == 0) |
| 336 | { | ||
| 337 | 2 | break; | |
| 338 | } | ||
| 339 | |||
| 340 | 2 | converted = gate_base64_decode_block(srcbuffer, returned, dstbuffer, sizeof(dstbuffer)); | |
| 341 |
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2 | if (converted == 0) |
| 342 | { | ||
| 343 | ✗ | ret = GATE_RESULT_INVALIDINPUT; | |
| 344 | ✗ | break; | |
| 345 | } | ||
| 346 | |||
| 347 | 2 | ret = gate_stream_write_block(dst, dstbuffer, converted, &written); | |
| 348 |
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2 | if (GATE_FAILED(ret)) |
| 349 | { | ||
| 350 | ✗ | break; | |
| 351 | } | ||
| 352 | } | ||
| 353 | |||
| 354 | 2 | return ret; | |
| 355 | } | ||
| 356 | |||
| 357 | 2 | gate_result_t gate_base64_decode_buffer(char const* src, gate_size_t srclength, char* dst, gate_size_t* dstlength) | |
| 358 | { | ||
| 359 | gate_result_t ret; | ||
| 360 | gate_size_t outlength; | ||
| 361 | gate_size_t lendecoded; | ||
| 362 | 2 | char const* ptrsrc = src; | |
| 363 | 2 | char* ptrdst = dst; | |
| 364 | |||
| 365 | do | ||
| 366 | { | ||
| 367 |
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2 | if ((srclength == 0) || (dstlength == NULL)) |
| 368 | { | ||
| 369 | ✗ | ret = GATE_RESULT_INVALIDARG; | |
| 370 | ✗ | break; | |
| 371 | } | ||
| 372 |
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2 | if ((srclength % 4) != 0) |
| 373 | { | ||
| 374 | ✗ | srclength -= (srclength % 4); | |
| 375 | } | ||
| 376 | 2 | outlength = (srclength / 4) * 3; | |
| 377 | |||
| 378 |
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2 | if (*dstlength < outlength) |
| 379 | { | ||
| 380 | ✗ | ret = GATE_RESULT_BUFFERTOOSMALL; | |
| 381 | ✗ | *dstlength = outlength; | |
| 382 | ✗ | break; | |
| 383 | } | ||
| 384 |
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2 | if ((src == NULL) || (dst == NULL)) |
| 385 | { | ||
| 386 | ✗ | ret = GATE_RESULT_INVALIDARG; | |
| 387 | ✗ | break; | |
| 388 | } | ||
| 389 | |||
| 390 | 2 | ret = GATE_RESULT_OK; | |
| 391 | 2 | outlength = 0; | |
| 392 |
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22 | while (srclength >= 4) |
| 393 | { | ||
| 394 | 20 | lendecoded = gate_base64_dec(ptrsrc, ptrdst); | |
| 395 |
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20 | if (lendecoded == 0) |
| 396 | { | ||
| 397 | ✗ | ret = GATE_RESULT_INVALIDINPUT; | |
| 398 | ✗ | break; | |
| 399 | } | ||
| 400 | 20 | ptrsrc += 4; | |
| 401 | 20 | srclength -= 4; | |
| 402 | 20 | ptrdst += lendecoded; | |
| 403 | 20 | outlength += lendecoded; | |
| 404 | } | ||
| 405 | 2 | *dstlength = outlength; | |
| 406 | } while (0); | ||
| 407 | |||
| 408 | 2 | return ret; | |
| 409 | } | ||
| 410 |