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-rw-r--r--src/lib/libcrypto/evp/bio_b64.c524
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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,char *buf,int num);
66static int b64_read(BIO *h,char *buf,int size);
67/*static int b64_puts(BIO *h,char *str); */
68/*static int b64_gets(BIO *h,char *str,int size); */
69static long b64_ctrl(BIO *h,int cmd,long arg1,char *arg2);
70static int b64_new(BIO *h);
71static int b64_free(BIO *data);
72#define B64_BLOCK_SIZE 1024
73#define B64_BLOCK_SIZE2 768
74#define B64_NONE 0
75#define B64_ENCODE 1
76#define B64_DECODE 2
77
78typedef struct b64_struct
79 {
80 /*BIO *bio; moved to the BIO structure */
81 int buf_len;
82 int buf_off;
83 int tmp_len; /* used to find the start when decoding */
84 int tmp_nl; /* If true, scan until '\n' */
85 int encode;
86 int start; /* have we started decoding yet? */
87 int cont; /* <= 0 when finished */
88 EVP_ENCODE_CTX base64;
89 char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE)+10];
90 char tmp[B64_BLOCK_SIZE];
91 } BIO_B64_CTX;
92
93static BIO_METHOD methods_b64=
94 {
95 BIO_TYPE_BASE64,"base64 encoding",
96 b64_write,
97 b64_read,
98 NULL, /* b64_puts, */
99 NULL, /* b64_gets, */
100 b64_ctrl,
101 b64_new,
102 b64_free,
103 };
104
105BIO_METHOD *BIO_f_base64(void)
106 {
107 return(&methods_b64);
108 }
109
110static int b64_new(BIO *bi)
111 {
112 BIO_B64_CTX *ctx;
113
114 ctx=(BIO_B64_CTX *)Malloc(sizeof(BIO_B64_CTX));
115 if (ctx == NULL) return(0);
116
117 ctx->buf_len=0;
118 ctx->tmp_len=0;
119 ctx->tmp_nl=0;
120 ctx->buf_off=0;
121 ctx->cont=1;
122 ctx->start=1;
123 ctx->encode=0;
124
125 bi->init=1;
126 bi->ptr=(char *)ctx;
127 bi->flags=0;
128 return(1);
129 }
130
131static int b64_free(BIO *a)
132 {
133 if (a == NULL) return(0);
134 Free(a->ptr);
135 a->ptr=NULL;
136 a->init=0;
137 a->flags=0;
138 return(1);
139 }
140
141static int b64_read(BIO *b, char *out, int outl)
142 {
143 int ret=0,i,ii,j,k,x,n,num,ret_code=0;
144 BIO_B64_CTX *ctx;
145 unsigned char *p,*q;
146
147 if (out == NULL) return(0);
148 ctx=(BIO_B64_CTX *)b->ptr;
149
150 if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
151
152 if (ctx->encode != B64_DECODE)
153 {
154 ctx->encode=B64_DECODE;
155 ctx->buf_len=0;
156 ctx->buf_off=0;
157 ctx->tmp_len=0;
158 EVP_DecodeInit(&(ctx->base64));
159 }
160
161 /* First check if there are bytes decoded/encoded */
162 if (ctx->buf_len > 0)
163 {
164 i=ctx->buf_len-ctx->buf_off;
165 if (i > outl) i=outl;
166 memcpy(out,&(ctx->buf[ctx->buf_off]),i);
167 ret=i;
168 out+=i;
169 outl-=i;
170 ctx->buf_off+=i;
171 if (ctx->buf_len == ctx->buf_off)
172 {
173 ctx->buf_len=0;
174 ctx->buf_off=0;
175 }
176 }
177
178 /* At this point, we have room of outl bytes and an empty
179 * buffer, so we should read in some more. */
180
181 ret_code=0;
182 while (outl > 0)
183 {
184 if (ctx->cont <= 0) break;
185
186 i=BIO_read(b->next_bio,&(ctx->tmp[ctx->tmp_len]),
187 B64_BLOCK_SIZE-ctx->tmp_len);
188
189 if (i <= 0)
190 {
191 ret_code=i;
192
193 /* Should be continue next time we are called? */
194 if (!BIO_should_retry(b->next_bio))
195 ctx->cont=i;
196 /* else we should continue when called again */
197 break;
198 }
199 i+=ctx->tmp_len;
200
201 /* We need to scan, a line at a time until we
202 * have a valid line if we are starting. */
203 if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL))
204 {
205 /* ctx->start=1; */
206 ctx->tmp_len=0;
207 }
208 else if (ctx->start)
209 {
210 q=p=(unsigned char *)ctx->tmp;
211 for (j=0; j<i; j++)
212 {
213 if (*(q++) != '\n') continue;
214
215 /* due to a previous very long line,
216 * we need to keep on scanning for a '\n'
217 * before we even start looking for
218 * base64 encoded stuff. */
219 if (ctx->tmp_nl)
220 {
221 p=q;
222 ctx->tmp_nl=0;
223 continue;
224 }
225
226 k=EVP_DecodeUpdate(&(ctx->base64),
227 (unsigned char *)ctx->buf,
228 &num,p,q-p);
229 if ((k <= 0) && (num == 0) && (ctx->start))
230 EVP_DecodeInit(&ctx->base64);
231 else
232 {
233 if (p != (unsigned char *)
234 &(ctx->tmp[0]))
235 {
236 i-=(p- (unsigned char *)
237 &(ctx->tmp[0]));
238 for (x=0; x < i; x++)
239 ctx->tmp[x]=p[x];
240 EVP_DecodeInit(&ctx->base64);
241 }
242 ctx->start=0;
243 break;
244 }
245 p=q;
246 }
247
248 /* we fell off the end without starting */
249 if (j == i)
250 {
251 /* Is this is one long chunk?, if so, keep on
252 * reading until a new line. */
253 if (p == (unsigned char *)&(ctx->tmp[0]))
254 {
255 ctx->tmp_nl=1;
256 ctx->tmp_len=0;
257 }
258 else if (p != q) /* finished on a '\n' */
259 {
260 n=q-p;
261 for (ii=0; ii<n; ii++)
262 ctx->tmp[ii]=p[ii];
263 ctx->tmp_len=n;
264 }
265 /* else finished on a '\n' */
266 continue;
267 }
268 else
269 ctx->tmp_len=0;
270 }
271
272 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
273 {
274 int z,jj;
275
276 jj=(i>>2)<<2;
277 z=EVP_DecodeBlock((unsigned char *)ctx->buf,
278 (unsigned char *)ctx->tmp,jj);
279 if (jj > 2)
280 {
281 if (ctx->tmp[jj-1] == '=')
282 {
283 z--;
284 if (ctx->tmp[jj-2] == '=')
285 z--;
286 }
287 }
288 /* z is now number of output bytes and jj is the
289 * number consumed */
290 if (jj != i)
291 {
292 memcpy((unsigned char *)ctx->tmp,
293 (unsigned char *)&(ctx->tmp[jj]),i-jj);
294 ctx->tmp_len=i-jj;
295 }
296 ctx->buf_len=0;
297 if (z > 0)
298 {
299 ctx->buf_len=z;
300 i=1;
301 }
302 else
303 i=z;
304 }
305 else
306 {
307 i=EVP_DecodeUpdate(&(ctx->base64),
308 (unsigned char *)ctx->buf,&ctx->buf_len,
309 (unsigned char *)ctx->tmp,i);
310 }
311 ctx->cont=i;
312 ctx->buf_off=0;
313 if (i < 0)
314 {
315 ret_code=0;
316 ctx->buf_len=0;
317 break;
318 }
319
320 if (ctx->buf_len <= outl)
321 i=ctx->buf_len;
322 else
323 i=outl;
324
325 memcpy(out,ctx->buf,i);
326 ret+=i;
327 ctx->buf_off=i;
328 if (ctx->buf_off == ctx->buf_len)
329 {
330 ctx->buf_len=0;
331 ctx->buf_off=0;
332 }
333 outl-=i;
334 out+=i;
335 }
336 BIO_clear_retry_flags(b);
337 BIO_copy_next_retry(b);
338 return((ret == 0)?ret_code:ret);
339 }
340
341static int b64_write(BIO *b, char *in, int inl)
342 {
343 int ret=inl,n,i;
344 BIO_B64_CTX *ctx;
345
346 ctx=(BIO_B64_CTX *)b->ptr;
347 BIO_clear_retry_flags(b);
348
349 if (ctx->encode != B64_ENCODE)
350 {
351 ctx->encode=B64_ENCODE;
352 ctx->buf_len=0;
353 ctx->buf_off=0;
354 ctx->tmp_len=0;
355 EVP_EncodeInit(&(ctx->base64));
356 }
357
358 n=ctx->buf_len-ctx->buf_off;
359 while (n > 0)
360 {
361 i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
362 if (i <= 0)
363 {
364 BIO_copy_next_retry(b);
365 return(i);
366 }
367 ctx->buf_off+=i;
368 n-=i;
369 }
370 /* at this point all pending data has been written */
371
372 if ((in == NULL) || (inl <= 0)) return(0);
373
374 ctx->buf_off=0;
375 while (inl > 0)
376 {
377 n=(inl > B64_BLOCK_SIZE)?B64_BLOCK_SIZE:inl;
378
379 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
380 {
381 if (ctx->tmp_len > 0)
382 {
383 n=3-ctx->tmp_len;
384 memcpy(&(ctx->tmp[ctx->tmp_len]),in,n);
385 ctx->tmp_len+=n;
386 n=ctx->tmp_len;
387 if (n < 3)
388 break;
389 ctx->buf_len=EVP_EncodeBlock(
390 (unsigned char *)ctx->buf,
391 (unsigned char *)ctx->tmp,n);
392 }
393 else
394 {
395 if (n < 3)
396 {
397 memcpy(&(ctx->tmp[0]),in,n);
398 ctx->tmp_len=n;
399 break;
400 }
401 n-=n%3;
402 ctx->buf_len=EVP_EncodeBlock(
403 (unsigned char *)ctx->buf,
404 (unsigned char *)in,n);
405 }
406 }
407 else
408 {
409 EVP_EncodeUpdate(&(ctx->base64),
410 (unsigned char *)ctx->buf,&ctx->buf_len,
411 (unsigned char *)in,n);
412 }
413 inl-=n;
414 in+=n;
415
416 ctx->buf_off=0;
417 n=ctx->buf_len;
418 while (n > 0)
419 {
420 i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
421 if (i <= 0)
422 {
423 BIO_copy_next_retry(b);
424 return((ret == 0)?i:ret);
425 }
426 n-=i;
427 ctx->buf_off+=i;
428 }
429 ctx->buf_len=0;
430 ctx->buf_off=0;
431 }
432 return(ret);
433 }
434
435static long b64_ctrl(BIO *b, int cmd, long num, char *ptr)
436 {
437 BIO_B64_CTX *ctx;
438 long ret=1;
439 int i;
440
441 ctx=(BIO_B64_CTX *)b->ptr;
442
443 switch (cmd)
444 {
445 case BIO_CTRL_RESET:
446 ctx->cont=1;
447 ctx->start=1;
448 ctx->encode=B64_NONE;
449 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
450 break;
451 case BIO_CTRL_EOF: /* More to read */
452 if (ctx->cont <= 0)
453 ret=1;
454 else
455 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
456 break;
457 case BIO_CTRL_WPENDING: /* More to write in buffer */
458 ret=ctx->buf_len-ctx->buf_off;
459 if ((ret == 0) && (ctx->base64.num != 0))
460 ret=1;
461 else if (ret <= 0)
462 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
463 break;
464 case BIO_CTRL_PENDING: /* More to read in buffer */
465 ret=ctx->buf_len-ctx->buf_off;
466 if (ret <= 0)
467 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
468 break;
469 case BIO_CTRL_FLUSH:
470 /* do a final write */
471again:
472 while (ctx->buf_len != ctx->buf_off)
473 {
474 i=b64_write(b,NULL,0);
475 if (i < 0)
476 {
477 ret=i;
478 break;
479 }
480 }
481 if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
482 {
483 if (ctx->tmp_len != 0)
484 {
485 ctx->buf_len=EVP_EncodeBlock(
486 (unsigned char *)ctx->buf,
487 (unsigned char *)ctx->tmp,
488 ctx->tmp_len);
489 ctx->buf_off=0;
490 ctx->tmp_len=0;
491 goto again;
492 }
493 }
494 else if (ctx->base64.num != 0)
495 {
496 ctx->buf_off=0;
497 EVP_EncodeFinal(&(ctx->base64),
498 (unsigned char *)ctx->buf,
499 &(ctx->buf_len));
500 /* push out the bytes */
501 goto again;
502 }
503 /* Finally flush the underlying BIO */
504 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
505 break;
506
507 case BIO_C_DO_STATE_MACHINE:
508 BIO_clear_retry_flags(b);
509 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
510 BIO_copy_next_retry(b);
511 break;
512
513 case BIO_CTRL_DUP:
514 break;
515 case BIO_CTRL_INFO:
516 case BIO_CTRL_GET:
517 case BIO_CTRL_SET:
518 default:
519 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
520 break;
521 }
522 return(ret);
523 }
524
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