lib/libcrypto/bio/b_dump.c

   1 /* $OpenBSD: b_dump.c,v 1.21 2015/04/23 06:11:19 deraadt 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 /*
  60  * Stolen from tjh's ssl/ssl_trc.c stuff.
  61  */
  62
  63 #include <stdio.h>
  64 #include <string.h>
  65
  66 #include <openssl/bio.h>
  67
  68 #define TRUNCATE
  69 #define DUMP_WIDTH      16
  70 #define DUMP_WIDTH_LESS_INDENT(i) (DUMP_WIDTH - ((i - (i > 6 ? 6 : i) + 3) / 4))
  71
  72 int
  73 BIO_dump_cb(int (*cb)(const void *data, size_t len, void *u),
  74     void *u, const char *s, int len)
  75 {
  76         return BIO_dump_indent_cb(cb, u, s, len, 0);
  77 }
  78
  79 int
  80 BIO_dump_indent_cb(int (*cb)(const void *data, size_t len, void *u),
  81     void *u, const char *s, int len, int indent)
  82 {
  83         int ret = 0;
  84         char buf[288 + 1], tmp[20], str[128 + 1];
  85         int i, j, rows, trc;
  86         unsigned char ch;
  87         int dump_width;
  88
  89         trc = 0;
  90
  91 #ifdef TRUNCATE
  92         for (; (len > 0) && ((s[len - 1] == ' ') || (s[len - 1] == '\0')); len--)
  93                 trc++;
  94 #endif
  95
  96         if (indent < 0)
  97                 indent = 0;
  98         if (indent) {
  99                 if (indent > 128)
 100                         indent = 128;
 101                 memset(str, ' ', indent);
 102         }
 103         str[indent] = '\0';
 104
 105         dump_width = DUMP_WIDTH_LESS_INDENT(indent);
 106         rows = (len / dump_width);
 107         if ((rows * dump_width) < len)
 108                 rows++;
 109         for (i = 0; i < rows; i++) {
 110                 strlcpy(buf, str, sizeof buf);
 111                 snprintf(tmp, sizeof tmp, "%04x - ", i*dump_width);
 112                 strlcat(buf, tmp, sizeof buf);
 113                 for (j = 0; j < dump_width; j++) {
 114                         if (((i*dump_width) + j) >= len) {
 115                                 strlcat(buf, "   ", sizeof buf);
 116                         } else {
 117                                 ch = ((unsigned char)*(s + i*dump_width + j)) & 0xff;
 118                                 snprintf(tmp, sizeof tmp, "%02x%c", ch,
 119                                     j == 7 ? '-' : ' ');
 120                                 strlcat(buf, tmp, sizeof buf);
 121                         }
 122                 }
 123                 strlcat(buf, "  ", sizeof buf);
 124                 for (j = 0; j < dump_width; j++) {
 125                         if (((i*dump_width) + j) >= len)
 126                                 break;
 127                         ch = ((unsigned char)*(s + i * dump_width + j)) & 0xff;
 128                         snprintf(tmp, sizeof tmp, "%c",
 129                             ((ch >= ' ') && (ch <= '~')) ? ch : '.');
 130                         strlcat(buf, tmp, sizeof buf);
 131                 }
 132                 strlcat(buf, "\n", sizeof buf);
 133                 /* if this is the last call then update the ddt_dump thing so
 134                  * that we will move the selection point in the debug window
 135                  */
 136                 ret += cb((void *)buf, strlen(buf), u);
 137         }
 138 #ifdef TRUNCATE
 139         if (trc > 0) {
 140                 snprintf(buf, sizeof buf, "%s%04x - <SPACES/NULS>\n",
 141                     str, len + trc);
 142                 ret += cb((void *)buf, strlen(buf), u);
 143         }
 144 #endif
 145         return (ret);
 146 }
 147
 148 static int
 149 write_fp(const void *data, size_t len, void *fp)
 150 {
 151         return fwrite(data, 1, len, fp);
 152 }
 153
 154 int
 155 BIO_dump_fp(FILE *fp, const char *s, int len)
 156 {
 157         return BIO_dump_cb(write_fp, fp, s, len);
 158 }
 159
 160 int
 161 BIO_dump_indent_fp(FILE *fp, const char *s, int len, int indent)
 162 {
 163         return BIO_dump_indent_cb(write_fp, fp, s, len, indent);
 164 }
 165
 166 static int
 167 write_bio(const void *data, size_t len, void *bp)
 168 {
 169         return BIO_write((BIO *)bp, (const char *)data, len);
 170 }
 171
 172 int
 173 BIO_dump(BIO *bp, const char *s, int len)
 174 {
 175         return BIO_dump_cb(write_bio, bp, s, len);
 176 }
 177
 178 int
 179 BIO_dump_indent(BIO *bp, const char *s, int len, int indent)
 180 {
 181         return BIO_dump_indent_cb(write_bio, bp, s, len, indent);
 182 }