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Commit | Line | Data |
---|---|---|
62867571 | 1 | /* |
38fc02a7 | 2 | * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
11 | #include <errno.h> | |
b39fc560 | 12 | #include "internal/cryptlib.h" |
ec577822 BM |
13 | #include <openssl/buffer.h> |
14 | #include <openssl/evp.h> | |
a146ae55 | 15 | #include "internal/bio.h" |
d02b48c6 | 16 | |
0e1c0612 UM |
17 | static int b64_write(BIO *h, const char *buf, int num); |
18 | static int b64_read(BIO *h, char *buf, int size); | |
cb877ccb | 19 | static int b64_puts(BIO *h, const char *str); |
0e1c0612 | 20 | static long b64_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
d02b48c6 RE |
21 | static int b64_new(BIO *h); |
22 | static int b64_free(BIO *data); | |
fce78bd4 | 23 | static long b64_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp); |
0f113f3e MC |
24 | #define B64_BLOCK_SIZE 1024 |
25 | #define B64_BLOCK_SIZE2 768 | |
26 | #define B64_NONE 0 | |
27 | #define B64_ENCODE 1 | |
28 | #define B64_DECODE 2 | |
29 | ||
30 | typedef struct b64_struct { | |
31 | /* | |
32 | * BIO *bio; moved to the BIO structure | |
33 | */ | |
34 | int buf_len; | |
35 | int buf_off; | |
36 | int tmp_len; /* used to find the start when decoding */ | |
37 | int tmp_nl; /* If true, scan until '\n' */ | |
38 | int encode; | |
39 | int start; /* have we started decoding yet? */ | |
40 | int cont; /* <= 0 when finished */ | |
b518d2d5 | 41 | EVP_ENCODE_CTX *base64; |
f95fec29 DDO |
42 | unsigned char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE) + 10]; |
43 | unsigned char tmp[B64_BLOCK_SIZE]; | |
0f113f3e MC |
44 | } BIO_B64_CTX; |
45 | ||
04f6b0fd | 46 | static const BIO_METHOD methods_b64 = { |
27ab9195 DB |
47 | BIO_TYPE_BASE64, |
48 | "base64 encoding", | |
3befffa3 | 49 | bwrite_conv, |
0f113f3e | 50 | b64_write, |
d07aee2c | 51 | bread_conv, |
0f113f3e MC |
52 | b64_read, |
53 | b64_puts, | |
54 | NULL, /* b64_gets, */ | |
55 | b64_ctrl, | |
56 | b64_new, | |
57 | b64_free, | |
58 | b64_callback_ctrl, | |
59 | }; | |
d02b48c6 | 60 | |
04f6b0fd | 61 | const BIO_METHOD *BIO_f_base64(void) |
0f113f3e | 62 | { |
a146ae55 | 63 | return &methods_b64; |
0f113f3e | 64 | } |
d02b48c6 | 65 | |
6b691a5c | 66 | static int b64_new(BIO *bi) |
0f113f3e MC |
67 | { |
68 | BIO_B64_CTX *ctx; | |
69 | ||
e077455e | 70 | if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) |
cb1d435c | 71 | return 0; |
0f113f3e | 72 | |
0f113f3e MC |
73 | ctx->cont = 1; |
74 | ctx->start = 1; | |
e0d32e98 | 75 | ctx->base64 = EVP_ENCODE_CTX_new(); |
cb1d435c MRA |
76 | if (ctx->base64 == NULL) { |
77 | OPENSSL_free(ctx); | |
78 | return 0; | |
79 | } | |
80 | ||
a146ae55 MC |
81 | BIO_set_data(bi, ctx); |
82 | BIO_set_init(bi, 1); | |
83 | ||
84 | return 1; | |
0f113f3e | 85 | } |
d02b48c6 | 86 | |
6b691a5c | 87 | static int b64_free(BIO *a) |
0f113f3e | 88 | { |
a146ae55 | 89 | BIO_B64_CTX *ctx; |
f95fec29 | 90 | |
0f113f3e | 91 | if (a == NULL) |
a146ae55 MC |
92 | return 0; |
93 | ||
94 | ctx = BIO_get_data(a); | |
95 | if (ctx == NULL) | |
96 | return 0; | |
97 | ||
98 | EVP_ENCODE_CTX_free(ctx->base64); | |
99 | OPENSSL_free(ctx); | |
100 | BIO_set_data(a, NULL); | |
101 | BIO_set_init(a, 0); | |
102 | ||
103 | return 1; | |
0f113f3e MC |
104 | } |
105 | ||
6b691a5c | 106 | static int b64_read(BIO *b, char *out, int outl) |
0f113f3e MC |
107 | { |
108 | int ret = 0, i, ii, j, k, x, n, num, ret_code = 0; | |
109 | BIO_B64_CTX *ctx; | |
110 | unsigned char *p, *q; | |
a146ae55 | 111 | BIO *next; |
0f113f3e MC |
112 | |
113 | if (out == NULL) | |
26a7d938 | 114 | return 0; |
a146ae55 | 115 | ctx = (BIO_B64_CTX *)BIO_get_data(b); |
0f113f3e | 116 | |
a146ae55 | 117 | next = BIO_next(b); |
f95fec29 | 118 | if (ctx == NULL || next == NULL) |
a146ae55 | 119 | return 0; |
0f113f3e MC |
120 | |
121 | BIO_clear_retry_flags(b); | |
122 | ||
123 | if (ctx->encode != B64_DECODE) { | |
124 | ctx->encode = B64_DECODE; | |
125 | ctx->buf_len = 0; | |
126 | ctx->buf_off = 0; | |
127 | ctx->tmp_len = 0; | |
b518d2d5 | 128 | EVP_DecodeInit(ctx->base64); |
0f113f3e MC |
129 | } |
130 | ||
131 | /* First check if there are bytes decoded/encoded */ | |
132 | if (ctx->buf_len > 0) { | |
133 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
134 | i = ctx->buf_len - ctx->buf_off; | |
135 | if (i > outl) | |
136 | i = outl; | |
137 | OPENSSL_assert(ctx->buf_off + i < (int)sizeof(ctx->buf)); | |
138 | memcpy(out, &(ctx->buf[ctx->buf_off]), i); | |
139 | ret = i; | |
140 | out += i; | |
141 | outl -= i; | |
142 | ctx->buf_off += i; | |
143 | if (ctx->buf_len == ctx->buf_off) { | |
144 | ctx->buf_len = 0; | |
145 | ctx->buf_off = 0; | |
146 | } | |
147 | } | |
148 | ||
149 | /* | |
150 | * At this point, we have room of outl bytes and an empty buffer, so we | |
151 | * should read in some more. | |
152 | */ | |
153 | ||
154 | ret_code = 0; | |
155 | while (outl > 0) { | |
156 | if (ctx->cont <= 0) | |
157 | break; | |
158 | ||
a146ae55 | 159 | i = BIO_read(next, &(ctx->tmp[ctx->tmp_len]), |
0f113f3e MC |
160 | B64_BLOCK_SIZE - ctx->tmp_len); |
161 | ||
162 | if (i <= 0) { | |
163 | ret_code = i; | |
164 | ||
165 | /* Should we continue next time we are called? */ | |
a146ae55 | 166 | if (!BIO_should_retry(next)) { |
0f113f3e MC |
167 | ctx->cont = i; |
168 | /* If buffer empty break */ | |
169 | if (ctx->tmp_len == 0) | |
170 | break; | |
171 | /* Fall through and process what we have */ | |
172 | else | |
173 | i = 0; | |
174 | } | |
175 | /* else we retry and add more data to buffer */ | |
176 | else | |
177 | break; | |
178 | } | |
179 | i += ctx->tmp_len; | |
180 | ctx->tmp_len = i; | |
181 | ||
182 | /* | |
183 | * We need to scan, a line at a time until we have a valid line if we | |
184 | * are starting. | |
185 | */ | |
f95fec29 | 186 | if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) != 0) { |
0f113f3e MC |
187 | ctx->tmp_len = 0; |
188 | } else if (ctx->start) { | |
f95fec29 | 189 | q = p = ctx->tmp; |
0f113f3e MC |
190 | num = 0; |
191 | for (j = 0; j < i; j++) { | |
192 | if (*(q++) != '\n') | |
193 | continue; | |
194 | ||
195 | /* | |
196 | * due to a previous very long line, we need to keep on | |
197 | * scanning for a '\n' before we even start looking for | |
198 | * base64 encoded stuff. | |
199 | */ | |
200 | if (ctx->tmp_nl) { | |
201 | p = q; | |
202 | ctx->tmp_nl = 0; | |
203 | continue; | |
204 | } | |
205 | ||
f95fec29 DDO |
206 | k = EVP_DecodeUpdate(ctx->base64, ctx->buf, &num, p, q - p); |
207 | if (k <= 0 && num == 0 && ctx->start) { | |
b518d2d5 | 208 | EVP_DecodeInit(ctx->base64); |
f95fec29 DDO |
209 | } else { |
210 | if (p != ctx->tmp) { | |
211 | i -= p - ctx->tmp; | |
0f113f3e MC |
212 | for (x = 0; x < i; x++) |
213 | ctx->tmp[x] = p[x]; | |
214 | } | |
b518d2d5 | 215 | EVP_DecodeInit(ctx->base64); |
0f113f3e MC |
216 | ctx->start = 0; |
217 | break; | |
218 | } | |
219 | p = q; | |
220 | } | |
221 | ||
222 | /* we fell off the end without starting */ | |
f95fec29 | 223 | if (j == i && num == 0) { |
0f113f3e MC |
224 | /* |
225 | * Is this is one long chunk?, if so, keep on reading until a | |
226 | * new line. | |
227 | */ | |
f95fec29 | 228 | if (p == ctx->tmp) { |
0f113f3e MC |
229 | /* Check buffer full */ |
230 | if (i == B64_BLOCK_SIZE) { | |
231 | ctx->tmp_nl = 1; | |
232 | ctx->tmp_len = 0; | |
233 | } | |
234 | } else if (p != q) { /* finished on a '\n' */ | |
235 | n = q - p; | |
236 | for (ii = 0; ii < n; ii++) | |
237 | ctx->tmp[ii] = p[ii]; | |
238 | ctx->tmp_len = n; | |
239 | } | |
240 | /* else finished on a '\n' */ | |
241 | continue; | |
242 | } else { | |
243 | ctx->tmp_len = 0; | |
244 | } | |
f95fec29 | 245 | } else if (i < B64_BLOCK_SIZE && ctx->cont > 0) { |
0f113f3e MC |
246 | /* |
247 | * If buffer isn't full and we can retry then restart to read in | |
248 | * more data. | |
249 | */ | |
250 | continue; | |
251 | } | |
252 | ||
f95fec29 | 253 | if ((BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) != 0) { |
0f113f3e | 254 | int z, jj; |
58964a49 | 255 | |
0f113f3e | 256 | jj = i & ~3; /* process per 4 */ |
f95fec29 | 257 | z = EVP_DecodeBlock(ctx->buf, ctx->tmp, jj); |
0f113f3e MC |
258 | if (jj > 2) { |
259 | if (ctx->tmp[jj - 1] == '=') { | |
260 | z--; | |
261 | if (ctx->tmp[jj - 2] == '=') | |
262 | z--; | |
263 | } | |
264 | } | |
265 | /* | |
266 | * z is now number of output bytes and jj is the number consumed | |
267 | */ | |
268 | if (jj != i) { | |
269 | memmove(ctx->tmp, &ctx->tmp[jj], i - jj); | |
270 | ctx->tmp_len = i - jj; | |
271 | } | |
272 | ctx->buf_len = 0; | |
273 | if (z > 0) { | |
274 | ctx->buf_len = z; | |
275 | } | |
276 | i = z; | |
277 | } else { | |
f95fec29 DDO |
278 | i = EVP_DecodeUpdate(ctx->base64, ctx->buf, &ctx->buf_len, |
279 | ctx->tmp, i); | |
0f113f3e MC |
280 | ctx->tmp_len = 0; |
281 | } | |
d070b4ae DMSP |
282 | /* |
283 | * If eof or an error was signalled, then the condition | |
284 | * 'ctx->cont <= 0' will prevent b64_read() from reading | |
285 | * more data on subsequent calls. This assignment was | |
286 | * deleted accidentally in commit 5562cfaca4f3. | |
287 | */ | |
288 | ctx->cont = i; | |
289 | ||
0f113f3e MC |
290 | ctx->buf_off = 0; |
291 | if (i < 0) { | |
292 | ret_code = 0; | |
293 | ctx->buf_len = 0; | |
294 | break; | |
295 | } | |
296 | ||
297 | if (ctx->buf_len <= outl) | |
298 | i = ctx->buf_len; | |
299 | else | |
300 | i = outl; | |
301 | ||
302 | memcpy(out, ctx->buf, i); | |
303 | ret += i; | |
304 | ctx->buf_off = i; | |
305 | if (ctx->buf_off == ctx->buf_len) { | |
306 | ctx->buf_len = 0; | |
307 | ctx->buf_off = 0; | |
308 | } | |
309 | outl -= i; | |
310 | out += i; | |
311 | } | |
312 | /* BIO_clear_retry_flags(b); */ | |
313 | BIO_copy_next_retry(b); | |
f95fec29 | 314 | return ret == 0 ? ret_code : ret; |
0f113f3e | 315 | } |
d02b48c6 | 316 | |
0e1c0612 | 317 | static int b64_write(BIO *b, const char *in, int inl) |
0f113f3e MC |
318 | { |
319 | int ret = 0; | |
320 | int n; | |
321 | int i; | |
322 | BIO_B64_CTX *ctx; | |
a146ae55 MC |
323 | BIO *next; |
324 | ||
325 | ctx = (BIO_B64_CTX *)BIO_get_data(b); | |
326 | next = BIO_next(b); | |
f95fec29 | 327 | if (ctx == NULL || next == NULL) |
a146ae55 | 328 | return 0; |
0f113f3e | 329 | |
0f113f3e MC |
330 | BIO_clear_retry_flags(b); |
331 | ||
332 | if (ctx->encode != B64_ENCODE) { | |
333 | ctx->encode = B64_ENCODE; | |
334 | ctx->buf_len = 0; | |
335 | ctx->buf_off = 0; | |
336 | ctx->tmp_len = 0; | |
b518d2d5 | 337 | EVP_EncodeInit(ctx->base64); |
0f113f3e MC |
338 | } |
339 | ||
340 | OPENSSL_assert(ctx->buf_off < (int)sizeof(ctx->buf)); | |
341 | OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf)); | |
342 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
343 | n = ctx->buf_len - ctx->buf_off; | |
344 | while (n > 0) { | |
a146ae55 | 345 | i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n); |
0f113f3e MC |
346 | if (i <= 0) { |
347 | BIO_copy_next_retry(b); | |
26a7d938 | 348 | return i; |
0f113f3e MC |
349 | } |
350 | OPENSSL_assert(i <= n); | |
351 | ctx->buf_off += i; | |
352 | OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf)); | |
353 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
354 | n -= i; | |
355 | } | |
356 | /* at this point all pending data has been written */ | |
357 | ctx->buf_off = 0; | |
358 | ctx->buf_len = 0; | |
359 | ||
f95fec29 | 360 | if (in == NULL || inl <= 0) |
26a7d938 | 361 | return 0; |
0f113f3e MC |
362 | |
363 | while (inl > 0) { | |
f95fec29 | 364 | n = inl > B64_BLOCK_SIZE ? B64_BLOCK_SIZE : inl; |
0f113f3e | 365 | |
f95fec29 | 366 | if ((BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) != 0) { |
0f113f3e MC |
367 | if (ctx->tmp_len > 0) { |
368 | OPENSSL_assert(ctx->tmp_len <= 3); | |
369 | n = 3 - ctx->tmp_len; | |
370 | /* | |
371 | * There's a theoretical possibility for this | |
372 | */ | |
373 | if (n > inl) | |
374 | n = inl; | |
375 | memcpy(&(ctx->tmp[ctx->tmp_len]), in, n); | |
376 | ctx->tmp_len += n; | |
377 | ret += n; | |
378 | if (ctx->tmp_len < 3) | |
379 | break; | |
380 | ctx->buf_len = | |
f95fec29 | 381 | EVP_EncodeBlock(ctx->buf, ctx->tmp, ctx->tmp_len); |
0f113f3e MC |
382 | OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf)); |
383 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
384 | /* | |
385 | * Since we're now done using the temporary buffer, the | |
386 | * length should be 0'd | |
387 | */ | |
388 | ctx->tmp_len = 0; | |
389 | } else { | |
390 | if (n < 3) { | |
391 | memcpy(ctx->tmp, in, n); | |
392 | ctx->tmp_len = n; | |
393 | ret += n; | |
394 | break; | |
395 | } | |
396 | n -= n % 3; | |
397 | ctx->buf_len = | |
f95fec29 | 398 | EVP_EncodeBlock(ctx->buf, (unsigned char *)in, n); |
0f113f3e MC |
399 | OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf)); |
400 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
401 | ret += n; | |
402 | } | |
403 | } else { | |
f95fec29 DDO |
404 | if (!EVP_EncodeUpdate(ctx->base64, ctx->buf, &ctx->buf_len, |
405 | (unsigned char *)in, n)) | |
406 | return ret == 0 ? -1 : ret; | |
0f113f3e MC |
407 | OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf)); |
408 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
409 | ret += n; | |
410 | } | |
411 | inl -= n; | |
412 | in += n; | |
413 | ||
414 | ctx->buf_off = 0; | |
415 | n = ctx->buf_len; | |
416 | while (n > 0) { | |
a146ae55 | 417 | i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n); |
0f113f3e MC |
418 | if (i <= 0) { |
419 | BIO_copy_next_retry(b); | |
f95fec29 | 420 | return ret == 0 ? i : ret; |
0f113f3e MC |
421 | } |
422 | OPENSSL_assert(i <= n); | |
423 | n -= i; | |
424 | ctx->buf_off += i; | |
425 | OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf)); | |
426 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
427 | } | |
428 | ctx->buf_len = 0; | |
429 | ctx->buf_off = 0; | |
430 | } | |
26a7d938 | 431 | return ret; |
0f113f3e | 432 | } |
d02b48c6 | 433 | |
0e1c0612 | 434 | static long b64_ctrl(BIO *b, int cmd, long num, void *ptr) |
0f113f3e MC |
435 | { |
436 | BIO_B64_CTX *ctx; | |
437 | long ret = 1; | |
438 | int i; | |
a146ae55 | 439 | BIO *next; |
0f113f3e | 440 | |
a146ae55 MC |
441 | ctx = (BIO_B64_CTX *)BIO_get_data(b); |
442 | next = BIO_next(b); | |
f95fec29 | 443 | if (ctx == NULL || next == NULL) |
a146ae55 | 444 | return 0; |
0f113f3e MC |
445 | |
446 | switch (cmd) { | |
447 | case BIO_CTRL_RESET: | |
448 | ctx->cont = 1; | |
449 | ctx->start = 1; | |
450 | ctx->encode = B64_NONE; | |
a146ae55 | 451 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
452 | break; |
453 | case BIO_CTRL_EOF: /* More to read */ | |
454 | if (ctx->cont <= 0) | |
455 | ret = 1; | |
456 | else | |
a146ae55 | 457 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
458 | break; |
459 | case BIO_CTRL_WPENDING: /* More to write in buffer */ | |
460 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
461 | ret = ctx->buf_len - ctx->buf_off; | |
f95fec29 DDO |
462 | if (ret == 0 && ctx->encode != B64_NONE |
463 | && EVP_ENCODE_CTX_num(ctx->base64) != 0) | |
0f113f3e MC |
464 | ret = 1; |
465 | else if (ret <= 0) | |
a146ae55 | 466 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
467 | break; |
468 | case BIO_CTRL_PENDING: /* More to read in buffer */ | |
469 | OPENSSL_assert(ctx->buf_len >= ctx->buf_off); | |
470 | ret = ctx->buf_len - ctx->buf_off; | |
471 | if (ret <= 0) | |
a146ae55 | 472 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
473 | break; |
474 | case BIO_CTRL_FLUSH: | |
475 | /* do a final write */ | |
476 | again: | |
477 | while (ctx->buf_len != ctx->buf_off) { | |
478 | i = b64_write(b, NULL, 0); | |
479 | if (i < 0) | |
480 | return i; | |
481 | } | |
482 | if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) { | |
483 | if (ctx->tmp_len != 0) { | |
f95fec29 DDO |
484 | ctx->buf_len = EVP_EncodeBlock(ctx->buf, |
485 | ctx->tmp, ctx->tmp_len); | |
0f113f3e MC |
486 | ctx->buf_off = 0; |
487 | ctx->tmp_len = 0; | |
488 | goto again; | |
489 | } | |
b518d2d5 RL |
490 | } else if (ctx->encode != B64_NONE |
491 | && EVP_ENCODE_CTX_num(ctx->base64) != 0) { | |
0f113f3e | 492 | ctx->buf_off = 0; |
f95fec29 | 493 | EVP_EncodeFinal(ctx->base64, ctx->buf, &(ctx->buf_len)); |
0f113f3e MC |
494 | /* push out the bytes */ |
495 | goto again; | |
496 | } | |
497 | /* Finally flush the underlying BIO */ | |
a146ae55 | 498 | ret = BIO_ctrl(next, cmd, num, ptr); |
bcbc7d60 | 499 | BIO_copy_next_retry(b); |
0f113f3e MC |
500 | break; |
501 | ||
502 | case BIO_C_DO_STATE_MACHINE: | |
503 | BIO_clear_retry_flags(b); | |
a146ae55 | 504 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
505 | BIO_copy_next_retry(b); |
506 | break; | |
507 | ||
508 | case BIO_CTRL_DUP: | |
509 | break; | |
510 | case BIO_CTRL_INFO: | |
511 | case BIO_CTRL_GET: | |
512 | case BIO_CTRL_SET: | |
513 | default: | |
a146ae55 | 514 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
515 | break; |
516 | } | |
a146ae55 | 517 | return ret; |
0f113f3e | 518 | } |
d02b48c6 | 519 | |
fce78bd4 | 520 | static long b64_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp) |
0f113f3e | 521 | { |
a146ae55 | 522 | BIO *next = BIO_next(b); |
0f113f3e | 523 | |
a146ae55 MC |
524 | if (next == NULL) |
525 | return 0; | |
1f2235ea D |
526 | |
527 | return BIO_callback_ctrl(next, cmd, fp); | |
0f113f3e | 528 | } |
d3442bc7 | 529 | |
cb877ccb | 530 | static int b64_puts(BIO *b, const char *str) |
0f113f3e MC |
531 | { |
532 | return b64_write(b, str, strlen(str)); | |
533 | } |