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-rw-r--r--src/lib/libcrypto/evp/bio_b64.c547
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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
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1/* crypto/evp/bio_b64.c */
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 <stdio.h>
60#include <errno.h>
61#include "cryptlib.h"
62#include <openssl/buffer.h>
63#include <openssl/evp.h>
64
65static int b64_write(BIO *h, const char *buf, int num);
66static int b64_read(BIO *h, char *buf, int size);
67/*static int b64_puts(BIO *h, const char *str); */
68/*static int b64_gets(BIO *h, char *str, int size); */
69static long b64_ctrl(BIO *h, int cmd, long arg1, void *arg2);
70static int b64_new(BIO *h);
71static int b64_free(BIO *data);
72static long b64_callback_ctrl(BIO *h,int cmd,bio_info_cb *fp);
73#define B64_BLOCK_SIZE 1024
74#define B64_BLOCK_SIZE2 768
75#define B64_NONE 0
76#define B64_ENCODE 1
77#define B64_DECODE 2
78
79typedef struct b64_struct
80 {
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 {
96 BIO_TYPE_BASE64,"base64 encoding",
97 b64_write,
98 b64_read,
99 NULL, /* b64_puts, */
100 NULL, /* b64_gets, */
101 b64_ctrl,
102 b64_new,
103 b64_free,
104 b64_callback_ctrl,
105 };
106
107BIO_METHOD *BIO_f_base64(void)
108 {
109 return(&methods_b64);
110 }
111
112static int b64_new(BIO *bi)
113 {
114 BIO_B64_CTX *ctx;
115
116 ctx=(BIO_B64_CTX *)OPENSSL_malloc(sizeof(BIO_B64_CTX));
117 if (ctx == NULL) return(0);
118
119 ctx->buf_len=0;
120 ctx->tmp_len=0;
121 ctx->tmp_nl=0;
122 ctx->buf_off=0;
123 ctx->cont=1;
124 ctx->start=1;
125 ctx->encode=0;
126
127 bi->init=1;
128 bi->ptr=(char *)ctx;
129 bi->flags=0;
130 return(1);
131 }
132
133static int b64_free(BIO *a)
134 {
135 if (a == NULL) return(0);
136 OPENSSL_free(a->ptr);
137 a->ptr=NULL;
138 a->init=0;
139 a->flags=0;
140 return(1);
141 }
142
143static int b64_read(BIO *b, char *out, int outl)
144 {
145 int ret=0,i,ii,j,k,x,n,num,ret_code=0;
146 BIO_B64_CTX *ctx;
147 unsigned char *p,*q;
148
149 if (out == NULL) return(0);
150 ctx=(BIO_B64_CTX *)b->ptr;
151
152 if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
153
154 if (ctx->encode != B64_DECODE)
155 {
156 ctx->encode=B64_DECODE;
157 ctx->buf_len=0;
158 ctx->buf_off=0;
159 ctx->tmp_len=0;
160 EVP_DecodeInit(&(ctx->base64));
161 }
162
163 /* First check if there are bytes decoded/encoded */
164 if (ctx->buf_len > 0)
165 {
166 i=ctx->buf_len-ctx->buf_off;
167 if (i > outl) i=outl;
168 memcpy(out,&(ctx->buf[ctx->buf_off]),i);
169 ret=i;
170 out+=i;
171 outl-=i;
172 ctx->buf_off+=i;
173 if (ctx->buf_len == ctx->buf_off)
174 {
175 ctx->buf_len=0;
176 ctx->buf_off=0;
177 }
178 }
179
180 /* At this point, we have room of outl bytes and an empty
181 * buffer, so we should read in some more. */
182
183 ret_code=0;
184 while (outl > 0)
185 {
186 if (ctx->cont <= 0) break;
187
188 i=BIO_read(b->next_bio,&(ctx->tmp[ctx->tmp_len]),
189 B64_BLOCK_SIZE-ctx->tmp_len);
190
191 if (i <= 0)
192 {
193 ret_code=i;
194
195 /* Should be continue next time we are called? */
196 if (!BIO_should_retry(b->next_bio))
197 ctx->cont=i;
198 /* else we should continue when called again */
199 break;
200 }
201 i+=ctx->tmp_len;
202
203 /* We need to scan, a line at a time until we
204 * have a valid line if we are starting. */
205 if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL))
206 {
207 /* ctx->start=1; */
208 ctx->tmp_len=0;
209 }
210 else if (ctx->start)
211 {
212 q=p=(unsigned char *)ctx->tmp;
213 for (j=0; j<i; j++)
214 {
215 if (*(q++) != '\n') continue;
216
217 /* due to a previous very long line,
218 * we need to keep on scanning for a '\n'
219 * before we even start looking for
220 * base64 encoded stuff. */
221 if (ctx->tmp_nl)
222 {
223 p=q;
224 ctx->tmp_nl=0;
225 continue;
226 }
227
228 k=EVP_DecodeUpdate(&(ctx->base64),
229 (unsigned char *)ctx->buf,
230 &num,p,q-p);
231 if ((k <= 0) && (num == 0) && (ctx->start))
232 EVP_DecodeInit(&ctx->base64);
233 else
234 {
235 if (p != (unsigned char *)
236 &(ctx->tmp[0]))
237 {
238 i-=(p- (unsigned char *)
239 &(ctx->tmp[0]));
240 for (x=0; x < i; x++)
241 ctx->tmp[x]=p[x];
242 }
243 EVP_DecodeInit(&ctx->base64);
244 ctx->start=0;
245 break;
246 }
247 p=q;
248 }
249
250 /* we fell off the end without starting */
251 if (j == i)
252 {
253 /* Is this is one long chunk?, if so, keep on
254 * reading until a new line. */
255 if (p == (unsigned char *)&(ctx->tmp[0]))
256 {
257 ctx->tmp_nl=1;
258 ctx->tmp_len=0;
259 }
260 else if (p != q) /* finished on a '\n' */
261 {
262 n=q-p;
263 for (ii=0; ii<n; ii++)
264 ctx->tmp[ii]=p[ii];
265 ctx->tmp_len=n;
266 }
267 /* else finished on a '\n' */
268 continue;
269 }
270 else
271 ctx->tmp_len=0;
272 }
273
274 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
275 {
276 int z,jj;
277
278 jj=(i>>2)<<2;
279 z=EVP_DecodeBlock((unsigned char *)ctx->buf,
280 (unsigned char *)ctx->tmp,jj);
281 if (jj > 2)
282 {
283 if (ctx->tmp[jj-1] == '=')
284 {
285 z--;
286 if (ctx->tmp[jj-2] == '=')
287 z--;
288 }
289 }
290 /* z is now number of output bytes and jj is the
291 * number consumed */
292 if (jj != i)
293 {
294 memcpy((unsigned char *)ctx->tmp,
295 (unsigned char *)&(ctx->tmp[jj]),i-jj);
296 ctx->tmp_len=i-jj;
297 }
298 ctx->buf_len=0;
299 if (z > 0)
300 {
301 ctx->buf_len=z;
302 i=1;
303 }
304 else
305 i=z;
306 }
307 else
308 {
309 i=EVP_DecodeUpdate(&(ctx->base64),
310 (unsigned char *)ctx->buf,&ctx->buf_len,
311 (unsigned char *)ctx->tmp,i);
312 }
313 ctx->cont=i;
314 ctx->buf_off=0;
315 if (i < 0)
316 {
317 ret_code=0;
318 ctx->buf_len=0;
319 break;
320 }
321
322 if (ctx->buf_len <= outl)
323 i=ctx->buf_len;
324 else
325 i=outl;
326
327 memcpy(out,ctx->buf,i);
328 ret+=i;
329 ctx->buf_off=i;
330 if (ctx->buf_off == ctx->buf_len)
331 {
332 ctx->buf_len=0;
333 ctx->buf_off=0;
334 }
335 outl-=i;
336 out+=i;
337 }
338 BIO_clear_retry_flags(b);
339 BIO_copy_next_retry(b);
340 return((ret == 0)?ret_code:ret);
341 }
342
343static int b64_write(BIO *b, const char *in, int inl)
344 {
345 int ret=inl,n,i;
346 BIO_B64_CTX *ctx;
347
348 ctx=(BIO_B64_CTX *)b->ptr;
349 BIO_clear_retry_flags(b);
350
351 if (ctx->encode != B64_ENCODE)
352 {
353 ctx->encode=B64_ENCODE;
354 ctx->buf_len=0;
355 ctx->buf_off=0;
356 ctx->tmp_len=0;
357 EVP_EncodeInit(&(ctx->base64));
358 }
359
360 n=ctx->buf_len-ctx->buf_off;
361 while (n > 0)
362 {
363 i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
364 if (i <= 0)
365 {
366 BIO_copy_next_retry(b);
367 return(i);
368 }
369 ctx->buf_off+=i;
370 n-=i;
371 }
372 /* at this point all pending data has been written */
373 ctx->buf_off=0;
374 ctx->buf_len=0;
375
376 if ((in == NULL) || (inl <= 0)) return(0);
377
378 while (inl > 0)
379 {
380 n=(inl > B64_BLOCK_SIZE)?B64_BLOCK_SIZE:inl;
381
382 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
383 {
384 if (ctx->tmp_len > 0)
385 {
386 n=3-ctx->tmp_len;
387 /* There's a teoretical possibility for this */
388 if (n > inl)
389 n=inl;
390 memcpy(&(ctx->tmp[ctx->tmp_len]),in,n);
391 ctx->tmp_len+=n;
392 if (ctx->tmp_len < 3)
393 break;
394 ctx->buf_len=EVP_EncodeBlock(
395 (unsigned char *)ctx->buf,
396 (unsigned char *)ctx->tmp,
397 ctx->tmp_len);
398 /* Since we're now done using the temporary
399 buffer, the length should be 0'd */
400 ctx->tmp_len=0;
401 }
402 else
403 {
404 if (n < 3)
405 {
406 memcpy(&(ctx->tmp[0]),in,n);
407 ctx->tmp_len=n;
408 break;
409 }
410 n-=n%3;
411 ctx->buf_len=EVP_EncodeBlock(
412 (unsigned char *)ctx->buf,
413 (unsigned char *)in,n);
414 }
415 }
416 else
417 {
418 EVP_EncodeUpdate(&(ctx->base64),
419 (unsigned char *)ctx->buf,&ctx->buf_len,
420 (unsigned char *)in,n);
421 }
422 inl-=n;
423 in+=n;
424
425 ctx->buf_off=0;
426 n=ctx->buf_len;
427 while (n > 0)
428 {
429 i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
430 if (i <= 0)
431 {
432 BIO_copy_next_retry(b);
433 return((ret == 0)?i:ret);
434 }
435 n-=i;
436 ctx->buf_off+=i;
437 }
438 ctx->buf_len=0;
439 ctx->buf_off=0;
440 }
441 return(ret);
442 }
443
444static long b64_ctrl(BIO *b, int cmd, long num, void *ptr)
445 {
446 BIO_B64_CTX *ctx;
447 long ret=1;
448 int i;
449
450 ctx=(BIO_B64_CTX *)b->ptr;
451
452 switch (cmd)
453 {
454 case BIO_CTRL_RESET:
455 ctx->cont=1;
456 ctx->start=1;
457 ctx->encode=B64_NONE;
458 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
459 break;
460 case BIO_CTRL_EOF: /* More to read */
461 if (ctx->cont <= 0)
462 ret=1;
463 else
464 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
465 break;
466 case BIO_CTRL_WPENDING: /* More to write in buffer */
467 ret=ctx->buf_len-ctx->buf_off;
468 if ((ret == 0) && (ctx->base64.num != 0))
469 ret=1;
470 else if (ret <= 0)
471 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
472 break;
473 case BIO_CTRL_PENDING: /* More to read in buffer */
474 ret=ctx->buf_len-ctx->buf_off;
475 if (ret <= 0)
476 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
477 break;
478 case BIO_CTRL_FLUSH:
479 /* do a final write */
480again:
481 while (ctx->buf_len != ctx->buf_off)
482 {
483 i=b64_write(b,NULL,0);
484 if (i < 0)
485 {
486 ret=i;
487 break;
488 }
489 }
490 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
491 {
492 if (ctx->tmp_len != 0)
493 {
494 ctx->buf_len=EVP_EncodeBlock(
495 (unsigned char *)ctx->buf,
496 (unsigned char *)ctx->tmp,
497 ctx->tmp_len);
498 ctx->buf_off=0;
499 ctx->tmp_len=0;
500 goto again;
501 }
502 }
503 else if (ctx->base64.num != 0)
504 {
505 ctx->buf_off=0;
506 EVP_EncodeFinal(&(ctx->base64),
507 (unsigned char *)ctx->buf,
508 &(ctx->buf_len));
509 /* push out the bytes */
510 goto again;
511 }
512 /* Finally flush the underlying BIO */
513 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
514 break;
515
516 case BIO_C_DO_STATE_MACHINE:
517 BIO_clear_retry_flags(b);
518 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
519 BIO_copy_next_retry(b);
520 break;
521
522 case BIO_CTRL_DUP:
523 break;
524 case BIO_CTRL_INFO:
525 case BIO_CTRL_GET:
526 case BIO_CTRL_SET:
527 default:
528 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
529 break;
530 }
531 return(ret);
532 }
533
534static long b64_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
535 {
536 long ret=1;
537
538 if (b->next_bio == NULL) return(0);
539 switch (cmd)
540 {
541 default:
542 ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
543 break;
544 }
545 return(ret);
546 }
547
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