OpenCoverage

bf_lbuf.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/bio/bf_lbuf.c
Source codeSwitch to Preprocessed file
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1/*-
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.-
3 *-
4 * Licensed under the OpenSSL license (the "License"). You may not use-
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-
8 */-
9-
10#include <stdio.h>-
11#include <errno.h>-
12#include "bio_lcl.h"-
13#include "internal/cryptlib.h"-
14#include <openssl/evp.h>-
15-
16static int linebuffer_write(BIO *h, const char *buf, int num);-
17static int linebuffer_read(BIO *h, char *buf, int size);-
18static int linebuffer_puts(BIO *h, const char *str);-
19static int linebuffer_gets(BIO *h, char *str, int size);-
20static long linebuffer_ctrl(BIO *h, int cmd, long arg1, void *arg2);-
21static int linebuffer_new(BIO *h);-
22static int linebuffer_free(BIO *data);-
23static long linebuffer_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);-
24-
25/* A 10k maximum should be enough for most purposes */-
26#define DEFAULT_LINEBUFFER_SIZE 1024*10-
27-
28/* #define DEBUG */-
29-
30static const BIO_METHOD methods_linebuffer = {-
31 BIO_TYPE_LINEBUFFER,-
32 "linebuffer",-
33 /* TODO: Convert to new style write function */-
34 bwrite_conv,-
35 linebuffer_write,-
36 /* TODO: Convert to new style read function */-
37 bread_conv,-
38 linebuffer_read,-
39 linebuffer_puts,-
40 linebuffer_gets,-
41 linebuffer_ctrl,-
42 linebuffer_new,-
43 linebuffer_free,-
44 linebuffer_callback_ctrl,-
45};-
46-
47const BIO_METHOD *BIO_f_linebuffer(void)-
48{-
49 return &methods_linebuffer;
never executed: return &methods_linebuffer;
0
50}-
51-
52typedef struct bio_linebuffer_ctx_struct {-
53 char *obuf; /* the output char array */-
54 int obuf_size; /* how big is the output buffer */-
55 int obuf_len; /* how many bytes are in it */-
56} BIO_LINEBUFFER_CTX;-
57-
58static int linebuffer_new(BIO *bi)-
59{-
60 BIO_LINEBUFFER_CTX *ctx;-
61-
62 if ((ctx = OPENSSL_malloc(sizeof(*ctx))) == NULL) {
(ctx = CRYPTO_...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
63 BIOerr(BIO_F_LINEBUFFER_NEW, ERR_R_MALLOC_FAILURE);-
64 return 0;
never executed: return 0;
0
65 }-
66 ctx->obuf = OPENSSL_malloc(DEFAULT_LINEBUFFER_SIZE);-
67 if (ctx->obuf == NULL) {
ctx->obuf == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
68 BIOerr(BIO_F_LINEBUFFER_NEW, ERR_R_MALLOC_FAILURE);-
69 OPENSSL_free(ctx);-
70 return 0;
never executed: return 0;
0
71 }-
72 ctx->obuf_size = DEFAULT_LINEBUFFER_SIZE;-
73 ctx->obuf_len = 0;-
74-
75 bi->init = 1;-
76 bi->ptr = (char *)ctx;-
77 bi->flags = 0;-
78 return 1;
never executed: return 1;
0
79}-
80-
81static int linebuffer_free(BIO *a)-
82{-
83 BIO_LINEBUFFER_CTX *b;-
84-
85 if (a == NULL)
a == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
86 return 0;
never executed: return 0;
0
87 b = (BIO_LINEBUFFER_CTX *)a->ptr;-
88 OPENSSL_free(b->obuf);-
89 OPENSSL_free(a->ptr);-
90 a->ptr = NULL;-
91 a->init = 0;-
92 a->flags = 0;-
93 return 1;
never executed: return 1;
0
94}-
95-
96static int linebuffer_read(BIO *b, char *out, int outl)-
97{-
98 int ret = 0;-
99-
100 if (out == NULL)
out == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
101 return 0;
never executed: return 0;
0
102 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
103 return 0;
never executed: return 0;
0
104 ret = BIO_read(b->next_bio, out, outl);-
105 BIO_clear_retry_flags(b);-
106 BIO_copy_next_retry(b);-
107 return ret;
never executed: return ret;
0
108}-
109-
110static int linebuffer_write(BIO *b, const char *in, int inl)-
111{-
112 int i, num = 0, foundnl;-
113 BIO_LINEBUFFER_CTX *ctx;-
114-
115 if ((in == NULL) || (inl <= 0))
(in == ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
(inl <= 0)Description
TRUEnever evaluated
FALSEnever evaluated
0
116 return 0;
never executed: return 0;
0
117 ctx = (BIO_LINEBUFFER_CTX *)b->ptr;-
118 if ((ctx == NULL) || (b->next_bio == NULL))
(ctx == ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
(b->next_bio == ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
0
119 return 0;
never executed: return 0;
0
120-
121 BIO_clear_retry_flags(b);-
122-
123 do {-
124 const char *p;-
125 char c;-
126-
127 for (p = in, c = '\0'; p < in + inl && (c = *p) != '\n'; p++) ;
never executed: ;
p < in + inlDescription
TRUEnever evaluated
FALSEnever evaluated
(c = *p) != '\n'Description
TRUEnever evaluated
FALSEnever evaluated
0
128 if (c == '\n') {
c == '\n'Description
TRUEnever evaluated
FALSEnever evaluated
0
129 p++;-
130 foundnl = 1;-
131 } else
never executed: end of block
0
132 foundnl = 0;
never executed: foundnl = 0;
0
133-
134 /*-
135 * If a NL was found and we already have text in the save buffer,-
136 * concatenate them and write-
137 */-
138 while ((foundnl || p - in > ctx->obuf_size - ctx->obuf_len)
foundnlDescription
TRUEnever evaluated
FALSEnever evaluated
p - in > ctx->... ctx->obuf_lenDescription
TRUEnever evaluated
FALSEnever evaluated
0
139 && ctx->obuf_len > 0) {
ctx->obuf_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
140 int orig_olen = ctx->obuf_len;-
141-
142 i = ctx->obuf_size - ctx->obuf_len;-
143 if (p - in > 0) {
p - in > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
144 if (i >= p - in) {
i >= p - inDescription
TRUEnever evaluated
FALSEnever evaluated
0
145 memcpy(&(ctx->obuf[ctx->obuf_len]), in, p - in);-
146 ctx->obuf_len += p - in;-
147 inl -= p - in;-
148 num += p - in;-
149 in = p;-
150 } else {
never executed: end of block
0
151 memcpy(&(ctx->obuf[ctx->obuf_len]), in, i);-
152 ctx->obuf_len += i;-
153 inl -= i;-
154 in += i;-
155 num += i;-
156 }
never executed: end of block
0
157 }-
158 i = BIO_write(b->next_bio, ctx->obuf, ctx->obuf_len);-
159 if (i <= 0) {
i <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
160 ctx->obuf_len = orig_olen;-
161 BIO_copy_next_retry(b);-
162-
163 if (i < 0)
i < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
164 return ((num > 0) ? num : i);
never executed: return ((num > 0) ? num : i);
(num > 0)Description
TRUEnever evaluated
FALSEnever evaluated
0
165 if (i == 0)
i == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
166 return num;
never executed: return num;
0
167 }
never executed: end of block
0
168 if (i < ctx->obuf_len)
i < ctx->obuf_lenDescription
TRUEnever evaluated
FALSEnever evaluated
0
169 memmove(ctx->obuf, ctx->obuf + i, ctx->obuf_len - i);
never executed: memmove(ctx->obuf, ctx->obuf + i, ctx->obuf_len - i);
0
170 ctx->obuf_len -= i;-
171 }
never executed: end of block
0
172-
173 /*-
174 * Now that the save buffer is emptied, let's write the input buffer-
175 * if a NL was found and there is anything to write.-
176 */-
177 if ((foundnl || p - in > ctx->obuf_size) && p - in > 0) {
foundnlDescription
TRUEnever evaluated
FALSEnever evaluated
p - in > ctx->obuf_sizeDescription
TRUEnever evaluated
FALSEnever evaluated
p - in > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
178 i = BIO_write(b->next_bio, in, p - in);-
179 if (i <= 0) {
i <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
180 BIO_copy_next_retry(b);-
181 if (i < 0)
i < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
182 return ((num > 0) ? num : i);
never executed: return ((num > 0) ? num : i);
(num > 0)Description
TRUEnever evaluated
FALSEnever evaluated
0
183 if (i == 0)
i == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
184 return num;
never executed: return num;
0
185 }
never executed: end of block
0
186 num += i;-
187 in += i;-
188 inl -= i;-
189 }
never executed: end of block
0
190 }
never executed: end of block
0
191 while (foundnl && inl > 0);
foundnlDescription
TRUEnever evaluated
FALSEnever evaluated
inl > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
192 /*-
193 * We've written as much as we can. The rest of the input buffer, if-
194 * any, is text that doesn't and with a NL and therefore needs to be-
195 * saved for the next trip.-
196 */-
197 if (inl > 0) {
inl > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
198 memcpy(&(ctx->obuf[ctx->obuf_len]), in, inl);-
199 ctx->obuf_len += inl;-
200 num += inl;-
201 }
never executed: end of block
0
202 return num;
never executed: return num;
0
203}-
204-
205static long linebuffer_ctrl(BIO *b, int cmd, long num, void *ptr)-
206{-
207 BIO *dbio;-
208 BIO_LINEBUFFER_CTX *ctx;-
209 long ret = 1;-
210 char *p;-
211 int r;-
212 int obs;-
213-
214 ctx = (BIO_LINEBUFFER_CTX *)b->ptr;-
215-
216 switch (cmd) {-
217 case BIO_CTRL_RESET:
never executed: case 1:
0
218 ctx->obuf_len = 0;-
219 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
220 return 0;
never executed: return 0;
0
221 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);-
222 break;
never executed: break;
0
223 case BIO_CTRL_INFO:
never executed: case 3:
0
224 ret = (long)ctx->obuf_len;-
225 break;
never executed: break;
0
226 case BIO_CTRL_WPENDING:
never executed: case 13:
0
227 ret = (long)ctx->obuf_len;-
228 if (ret == 0) {
ret == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
229 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
230 return 0;
never executed: return 0;
0
231 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);-
232 }
never executed: end of block
0
233 break;
never executed: break;
0
234 case BIO_C_SET_BUFF_SIZE:
never executed: case 117:
0
235 obs = (int)num;-
236 p = ctx->obuf;-
237 if ((obs > DEFAULT_LINEBUFFER_SIZE) && (obs != ctx->obuf_size)) {
(obs > 1024*10)Description
TRUEnever evaluated
FALSEnever evaluated
(obs != ctx->obuf_size)Description
TRUEnever evaluated
FALSEnever evaluated
0
238 p = OPENSSL_malloc((int)num);-
239 if (p == NULL)
p == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
240 goto malloc_error;
never executed: goto malloc_error;
0
241 }
never executed: end of block
0
242 if (ctx->obuf != p) {
ctx->obuf != pDescription
TRUEnever evaluated
FALSEnever evaluated
0
243 if (ctx->obuf_len > obs) {
ctx->obuf_len > obsDescription
TRUEnever evaluated
FALSEnever evaluated
0
244 ctx->obuf_len = obs;-
245 }
never executed: end of block
0
246 memcpy(p, ctx->obuf, ctx->obuf_len);-
247 OPENSSL_free(ctx->obuf);-
248 ctx->obuf = p;-
249 ctx->obuf_size = obs;-
250 }
never executed: end of block
0
251 break;
never executed: break;
0
252 case BIO_C_DO_STATE_MACHINE:
never executed: case 101:
0
253 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
254 return 0;
never executed: return 0;
0
255 BIO_clear_retry_flags(b);-
256 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);-
257 BIO_copy_next_retry(b);-
258 break;
never executed: break;
0
259-
260 case BIO_CTRL_FLUSH:
never executed: case 11:
0
261 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
262 return 0;
never executed: return 0;
0
263 if (ctx->obuf_len <= 0) {
ctx->obuf_len <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
264 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);-
265 break;
never executed: break;
0
266 }-
267-
268 for (;;) {-
269 BIO_clear_retry_flags(b);-
270 if (ctx->obuf_len > 0) {
ctx->obuf_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
271 r = BIO_write(b->next_bio, ctx->obuf, ctx->obuf_len);-
272 BIO_copy_next_retry(b);-
273 if (r <= 0)
r <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
274 return (long)r;
never executed: return (long)r;
0
275 if (r < ctx->obuf_len)
r < ctx->obuf_lenDescription
TRUEnever evaluated
FALSEnever evaluated
0
276 memmove(ctx->obuf, ctx->obuf + r, ctx->obuf_len - r);
never executed: memmove(ctx->obuf, ctx->obuf + r, ctx->obuf_len - r);
0
277 ctx->obuf_len -= r;-
278 } else {
never executed: end of block
0
279 ctx->obuf_len = 0;-
280 break;
never executed: break;
0
281 }-
282 }-
283 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);-
284 break;
never executed: break;
0
285 case BIO_CTRL_DUP:
never executed: case 12:
0
286 dbio = (BIO *)ptr;-
287 if (!BIO_set_write_buffer_size(dbio, ctx->obuf_size))
!BIO_int_ctrl(...->obuf_size,1)Description
TRUEnever evaluated
FALSEnever evaluated
0
288 ret = 0;
never executed: ret = 0;
0
289 break;
never executed: break;
0
290 default:
never executed: default:
0
291 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
292 return 0;
never executed: return 0;
0
293 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);-
294 break;
never executed: break;
0
295 }-
296 return ret;
never executed: return ret;
0
297 malloc_error:-
298 BIOerr(BIO_F_LINEBUFFER_CTRL, ERR_R_MALLOC_FAILURE);-
299 return 0;
never executed: return 0;
0
300}-
301-
302static long linebuffer_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)-
303{-
304 long ret = 1;-
305-
306 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
307 return 0;
never executed: return 0;
0
308 switch (cmd) {-
309 default:
never executed: default:
0
310 ret = BIO_callback_ctrl(b->next_bio, cmd, fp);-
311 break;
never executed: break;
0
312 }-
313 return ret;
never executed: return ret;
0
314}-
315-
316static int linebuffer_gets(BIO *b, char *buf, int size)-
317{-
318 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
319 return 0;
never executed: return 0;
0
320 return BIO_gets(b->next_bio, buf, size);
never executed: return BIO_gets(b->next_bio, buf, size);
0
321}-
322-
323static int linebuffer_puts(BIO *b, const char *str)-
324{-
325 return linebuffer_write(b, str, strlen(str));
never executed: return linebuffer_write(b, str, strlen(str));
0
326}-
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