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-rw-r--r--src/lib/libcrypto/evp/bio_b64.c567
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diff --git a/src/lib/libcrypto/evp/bio_b64.c b/src/lib/libcrypto/evp/bio_b64.c
deleted file mode 100644
index b54e8793ec..0000000000
--- a/src/lib/libcrypto/evp/bio_b64.c
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1/* $OpenBSD: bio_b64.c,v 1.20 2015/02/07 13:19:15 doug Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <errno.h>
60#include <stdio.h>
61#include <string.h>
62
63#include <openssl/buffer.h>
64#include <openssl/evp.h>
65
66static int b64_write(BIO *h, const char *buf, int num);
67static int b64_read(BIO *h, char *buf, int size);
68static int b64_puts(BIO *h, const char *str);
69/*static int b64_gets(BIO *h, char *str, int size); */
70static long b64_ctrl(BIO *h, int cmd, long arg1, void *arg2);
71static int b64_new(BIO *h);
72static int b64_free(BIO *data);
73static long b64_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
74#define B64_BLOCK_SIZE 1024
75#define B64_BLOCK_SIZE2 768
76#define B64_NONE 0
77#define B64_ENCODE 1
78#define B64_DECODE 2
79
80typedef struct b64_struct {
81 /*BIO *bio; moved to the BIO structure */
82 int buf_len;
83 int buf_off;
84 int tmp_len; /* used to find the start when decoding */
85 int tmp_nl; /* If true, scan until '\n' */
86 int encode;
87 int start; /* have we started decoding yet? */
88 int cont; /* <= 0 when finished */
89 EVP_ENCODE_CTX base64;
90 char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE) + 10];
91 char tmp[B64_BLOCK_SIZE];
92} BIO_B64_CTX;
93
94static BIO_METHOD methods_b64 = {
95 .type = BIO_TYPE_BASE64,
96 .name = "base64 encoding",
97 .bwrite = b64_write,
98 .bread = b64_read,
99 .bputs = b64_puts,
100 .ctrl = b64_ctrl,
101 .create = b64_new,
102 .destroy = b64_free,
103 .callback_ctrl = b64_callback_ctrl
104};
105
106BIO_METHOD *
107BIO_f_base64(void)
108{
109 return (&methods_b64);
110}
111
112static int
113b64_new(BIO *bi)
114{
115 BIO_B64_CTX *ctx;
116
117 ctx = malloc(sizeof(BIO_B64_CTX));
118 if (ctx == NULL)
119 return (0);
120
121 ctx->buf_len = 0;
122 ctx->tmp_len = 0;
123 ctx->tmp_nl = 0;
124 ctx->buf_off = 0;
125 ctx->cont = 1;
126 ctx->start = 1;
127 ctx->encode = 0;
128
129 bi->init = 1;
130 bi->ptr = (char *)ctx;
131 bi->flags = 0;
132 bi->num = 0;
133 return (1);
134}
135
136static int
137b64_free(BIO *a)
138{
139 if (a == NULL)
140 return (0);
141 free(a->ptr);
142 a->ptr = NULL;
143 a->init = 0;
144 a->flags = 0;
145 return (1);
146}
147
148static int
149b64_read(BIO *b, char *out, int outl)
150{
151 int ret = 0, i, ii, j, k, x, n, num, ret_code = 0;
152 BIO_B64_CTX *ctx;
153 unsigned char *p, *q;
154
155 if (out == NULL)
156 return (0);
157 ctx = (BIO_B64_CTX *)b->ptr;
158
159 if ((ctx == NULL) || (b->next_bio == NULL))
160 return (0);
161
162 BIO_clear_retry_flags(b);
163
164 if (ctx->encode != B64_DECODE) {
165 ctx->encode = B64_DECODE;
166 ctx->buf_len = 0;
167 ctx->buf_off = 0;
168 ctx->tmp_len = 0;
169 EVP_DecodeInit(&(ctx->base64));
170 }
171
172 /* First check if there are bytes decoded/encoded */
173 if (ctx->buf_len > 0) {
174 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
175 i = ctx->buf_len - ctx->buf_off;
176 if (i > outl)
177 i = outl;
178 OPENSSL_assert(ctx->buf_off + i < (int)sizeof(ctx->buf));
179 memcpy(out, &(ctx->buf[ctx->buf_off]), i);
180 ret = i;
181 out += i;
182 outl -= i;
183 ctx->buf_off += i;
184 if (ctx->buf_len == ctx->buf_off) {
185 ctx->buf_len = 0;
186 ctx->buf_off = 0;
187 }
188 }
189
190 /* At this point, we have room of outl bytes and an empty
191 * buffer, so we should read in some more. */
192
193 ret_code = 0;
194 while (outl > 0) {
195 if (ctx->cont <= 0)
196 break;
197
198 i = BIO_read(b->next_bio, &(ctx->tmp[ctx->tmp_len]),
199 B64_BLOCK_SIZE - ctx->tmp_len);
200
201 if (i <= 0) {
202 ret_code = i;
203
204 /* Should we continue next time we are called? */
205 if (!BIO_should_retry(b->next_bio)) {
206 ctx->cont = i;
207 /* If buffer empty break */
208 if (ctx->tmp_len == 0)
209 break;
210 /* Fall through and process what we have */
211 else
212 i = 0;
213 }
214 /* else we retry and add more data to buffer */
215 else
216 break;
217 }
218 i += ctx->tmp_len;
219 ctx->tmp_len = i;
220
221 /* We need to scan, a line at a time until we
222 * have a valid line if we are starting. */
223 if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)) {
224 /* ctx->start=1; */
225 ctx->tmp_len = 0;
226 } else if (ctx->start) {
227 q = p =(unsigned char *)ctx->tmp;
228 num = 0;
229 for (j = 0; j < i; j++) {
230 if (*(q++) != '\n')
231 continue;
232
233 /* due to a previous very long line,
234 * we need to keep on scanning for a '\n'
235 * before we even start looking for
236 * base64 encoded stuff. */
237 if (ctx->tmp_nl) {
238 p = q;
239 ctx->tmp_nl = 0;
240 continue;
241 }
242
243 k = EVP_DecodeUpdate(&(ctx->base64),
244 (unsigned char *)ctx->buf,
245 &num, p, q - p);
246 if ((k <= 0) && (num == 0) && (ctx->start))
247 EVP_DecodeInit(&ctx->base64);
248 else {
249 if (p != (unsigned char *)
250 &(ctx->tmp[0])) {
251 i -= (p - (unsigned char *)
252 &(ctx->tmp[0]));
253 for (x = 0; x < i; x++)
254 ctx->tmp[x] = p[x];
255 }
256 EVP_DecodeInit(&ctx->base64);
257 ctx->start = 0;
258 break;
259 }
260 p = q;
261 }
262
263 /* we fell off the end without starting */
264 if ((j == i) && (num == 0)) {
265 /* Is this is one long chunk?, if so, keep on
266 * reading until a new line. */
267 if (p == (unsigned char *)&(ctx->tmp[0])) {
268 /* Check buffer full */
269 if (i == B64_BLOCK_SIZE) {
270 ctx->tmp_nl = 1;
271 ctx->tmp_len = 0;
272 }
273 }
274 else if (p != q) /* finished on a '\n' */
275 {
276 n = q - p;
277 for (ii = 0; ii < n; ii++)
278 ctx->tmp[ii] = p[ii];
279 ctx->tmp_len = n;
280 }
281 /* else finished on a '\n' */
282 continue;
283 } else {
284 ctx->tmp_len = 0;
285 }
286 } else if ((i < B64_BLOCK_SIZE) && (ctx->cont > 0)) {
287 /* If buffer isn't full and we can retry then
288 * restart to read in more data.
289 */
290 continue;
291 }
292
293 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
294 int z, jj;
295
296 jj = i & ~3; /* process per 4 */
297 z = EVP_DecodeBlock((unsigned char *)ctx->buf,
298 (unsigned char *)ctx->tmp, jj);
299 if (jj > 2) {
300 if (ctx->tmp[jj-1] == '=') {
301 z--;
302 if (ctx->tmp[jj-2] == '=')
303 z--;
304 }
305 }
306 /* z is now number of output bytes and jj is the
307 * number consumed */
308 if (jj != i) {
309 memmove(ctx->tmp, &ctx->tmp[jj], i - jj);
310 ctx->tmp_len = i - jj;
311 }
312 ctx->buf_len = 0;
313 if (z > 0) {
314 ctx->buf_len = z;
315 }
316 i = z;
317 } else {
318 i = EVP_DecodeUpdate(&(ctx->base64),
319 (unsigned char *)ctx->buf, &ctx->buf_len,
320 (unsigned char *)ctx->tmp, i);
321 ctx->tmp_len = 0;
322 }
323 ctx->buf_off = 0;
324 if (i < 0) {
325 ret_code = 0;
326 ctx->buf_len = 0;
327 break;
328 }
329
330 if (ctx->buf_len <= outl)
331 i = ctx->buf_len;
332 else
333 i = outl;
334
335 memcpy(out, ctx->buf, i);
336 ret += i;
337 ctx->buf_off = i;
338 if (ctx->buf_off == ctx->buf_len) {
339 ctx->buf_len = 0;
340 ctx->buf_off = 0;
341 }
342 outl -= i;
343 out += i;
344 }
345 /* BIO_clear_retry_flags(b); */
346 BIO_copy_next_retry(b);
347 return ((ret == 0) ? ret_code : ret);
348}
349
350static int
351b64_write(BIO *b, const char *in, int inl)
352{
353 int ret = 0;
354 int n;
355 int i;
356 BIO_B64_CTX *ctx;
357
358 ctx = (BIO_B64_CTX *)b->ptr;
359 BIO_clear_retry_flags(b);
360
361 if (ctx->encode != B64_ENCODE) {
362 ctx->encode = B64_ENCODE;
363 ctx->buf_len = 0;
364 ctx->buf_off = 0;
365 ctx->tmp_len = 0;
366 EVP_EncodeInit(&(ctx->base64));
367 }
368
369 OPENSSL_assert(ctx->buf_off < (int)sizeof(ctx->buf));
370 OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
371 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
372 n = ctx->buf_len - ctx->buf_off;
373 while (n > 0) {
374 i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
375 if (i <= 0) {
376 BIO_copy_next_retry(b);
377 return (i);
378 }
379 OPENSSL_assert(i <= n);
380 ctx->buf_off += i;
381 OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf));
382 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
383 n -= i;
384 }
385 /* at this point all pending data has been written */
386 ctx->buf_off = 0;
387 ctx->buf_len = 0;
388
389 if ((in == NULL) || (inl <= 0))
390 return (0);
391
392 while (inl > 0) {
393 n = (inl > B64_BLOCK_SIZE) ? B64_BLOCK_SIZE : inl;
394
395 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
396 if (ctx->tmp_len > 0) {
397 OPENSSL_assert(ctx->tmp_len <= 3);
398 n = 3 - ctx->tmp_len;
399 /* There's a theoretical possibility for this */
400 if (n > inl)
401 n = inl;
402 memcpy(&(ctx->tmp[ctx->tmp_len]), in, n);
403 ctx->tmp_len += n;
404 ret += n;
405 if (ctx->tmp_len < 3)
406 break;
407 ctx->buf_len = EVP_EncodeBlock(
408 (unsigned char *)ctx->buf,
409 (unsigned char *)ctx->tmp, ctx->tmp_len);
410 OPENSSL_assert(ctx->buf_len <=
411 (int)sizeof(ctx->buf));
412 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
413 /* Since we're now done using the temporary
414 buffer, the length should be 0'd */
415 ctx->tmp_len = 0;
416 } else {
417 if (n < 3) {
418 memcpy(ctx->tmp, in, n);
419 ctx->tmp_len = n;
420 ret += n;
421 break;
422 }
423 n -= n % 3;
424 ctx->buf_len = EVP_EncodeBlock(
425 (unsigned char *)ctx->buf,
426 (const unsigned char *)in, n);
427 OPENSSL_assert(ctx->buf_len <=
428 (int)sizeof(ctx->buf));
429 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
430 ret += n;
431 }
432 } else {
433 EVP_EncodeUpdate(&(ctx->base64),
434 (unsigned char *)ctx->buf, &ctx->buf_len,
435 (unsigned char *)in, n);
436 OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
437 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
438 ret += n;
439 }
440 inl -= n;
441 in += n;
442
443 ctx->buf_off = 0;
444 n = ctx->buf_len;
445 while (n > 0) {
446 i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n);
447 if (i <= 0) {
448 BIO_copy_next_retry(b);
449 return ((ret == 0) ? i : ret);
450 }
451 OPENSSL_assert(i <= n);
452 n -= i;
453 ctx->buf_off += i;
454 OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf));
455 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
456 }
457 ctx->buf_len = 0;
458 ctx->buf_off = 0;
459 }
460 return (ret);
461}
462
463static long
464b64_ctrl(BIO *b, int cmd, long num, void *ptr)
465{
466 BIO_B64_CTX *ctx;
467 long ret = 1;
468 int i;
469
470 ctx = (BIO_B64_CTX *)b->ptr;
471
472 switch (cmd) {
473 case BIO_CTRL_RESET:
474 ctx->cont = 1;
475 ctx->start = 1;
476 ctx->encode = B64_NONE;
477 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
478 break;
479 case BIO_CTRL_EOF: /* More to read */
480 if (ctx->cont <= 0)
481 ret = 1;
482 else
483 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
484 break;
485 case BIO_CTRL_WPENDING: /* More to write in buffer */
486 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
487 ret = ctx->buf_len - ctx->buf_off;
488 if ((ret == 0) && (ctx->encode != B64_NONE) &&
489 (ctx->base64.num != 0))
490 ret = 1;
491 else if (ret <= 0)
492 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
493 break;
494 case BIO_CTRL_PENDING: /* More to read in buffer */
495 OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
496 ret = ctx->buf_len - ctx->buf_off;
497 if (ret <= 0)
498 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
499 break;
500 case BIO_CTRL_FLUSH:
501 /* do a final write */
502again:
503 while (ctx->buf_len != ctx->buf_off) {
504 i = b64_write(b, NULL, 0);
505 if (i < 0)
506 return i;
507 }
508 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
509 if (ctx->tmp_len != 0) {
510 ctx->buf_len = EVP_EncodeBlock(
511 (unsigned char *)ctx->buf,
512 (unsigned char *)ctx->tmp,
513 ctx->tmp_len);
514 ctx->buf_off = 0;
515 ctx->tmp_len = 0;
516 goto again;
517 }
518 } else if (ctx->encode != B64_NONE && ctx->base64.num != 0) {
519 ctx->buf_off = 0;
520 EVP_EncodeFinal(&(ctx->base64),
521 (unsigned char *)ctx->buf,
522 &(ctx->buf_len));
523 /* push out the bytes */
524 goto again;
525 }
526 /* Finally flush the underlying BIO */
527 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
528 break;
529
530 case BIO_C_DO_STATE_MACHINE:
531 BIO_clear_retry_flags(b);
532 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
533 BIO_copy_next_retry(b);
534 break;
535
536 case BIO_CTRL_DUP:
537 break;
538 case BIO_CTRL_INFO:
539 case BIO_CTRL_GET:
540 case BIO_CTRL_SET:
541 default:
542 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
543 break;
544 }
545 return (ret);
546}
547
548static long
549b64_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
550{
551 long ret = 1;
552
553 if (b->next_bio == NULL)
554 return (0);
555 switch (cmd) {
556 default:
557 ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
558 break;
559 }
560 return (ret);
561}
562
563static int
564b64_puts(BIO *b, const char *str)
565{
566 return b64_write(b, str, strlen(str));
567}
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