| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #include <openssl/bio.h> |
| |
| #include <limits.h> |
| #include <string.h> |
| |
| #include "../internal.h" |
| |
| |
| /* hexdump_ctx contains the state of a hexdump. */ |
| struct hexdump_ctx { |
| BIO *bio; |
| char right_chars[18]; /* the contents of the right-hand side, ASCII dump. */ |
| unsigned used; /* number of bytes in the current line. */ |
| size_t n; /* number of bytes total. */ |
| unsigned indent; |
| }; |
| |
| static void hexbyte(char *out, uint8_t b) { |
| static const char hextable[] = "0123456789abcdef"; |
| out[0] = hextable[b>>4]; |
| out[1] = hextable[b&0x0f]; |
| } |
| |
| static char to_char(uint8_t b) { |
| if (b < 32 || b > 126) { |
| return '.'; |
| } |
| return b; |
| } |
| |
| /* hexdump_write adds |len| bytes of |data| to the current hex dump described by |
| * |ctx|. */ |
| static int hexdump_write(struct hexdump_ctx *ctx, const uint8_t *data, |
| size_t len) { |
| char buf[10]; |
| unsigned l; |
| |
| /* Output lines look like: |
| * 00000010 2e 2f 30 31 32 33 34 35 36 37 38 ... 3c 3d // |./0123456789:;<=| |
| * ^ offset ^ extra space ^ ASCII of line |
| */ |
| |
| for (size_t i = 0; i < len; i++) { |
| if (ctx->used == 0) { |
| /* The beginning of a line. */ |
| BIO_indent(ctx->bio, ctx->indent, UINT_MAX); |
| |
| hexbyte(&buf[0], ctx->n >> 24); |
| hexbyte(&buf[2], ctx->n >> 16); |
| hexbyte(&buf[4], ctx->n >> 8); |
| hexbyte(&buf[6], ctx->n); |
| buf[8] = buf[9] = ' '; |
| if (BIO_write(ctx->bio, buf, 10) < 0) { |
| return 0; |
| } |
| } |
| |
| hexbyte(buf, data[i]); |
| buf[2] = ' '; |
| l = 3; |
| if (ctx->used == 7) { |
| /* There's an additional space after the 8th byte. */ |
| buf[3] = ' '; |
| l = 4; |
| } else if (ctx->used == 15) { |
| /* At the end of the line there's an extra space and the bar for the |
| * right column. */ |
| buf[3] = ' '; |
| buf[4] = '|'; |
| l = 5; |
| } |
| |
| if (BIO_write(ctx->bio, buf, l) < 0) { |
| return 0; |
| } |
| ctx->right_chars[ctx->used] = to_char(data[i]); |
| ctx->used++; |
| ctx->n++; |
| if (ctx->used == 16) { |
| ctx->right_chars[16] = '|'; |
| ctx->right_chars[17] = '\n'; |
| if (BIO_write(ctx->bio, ctx->right_chars, sizeof(ctx->right_chars)) < 0) { |
| return 0; |
| } |
| ctx->used = 0; |
| } |
| } |
| |
| return 1; |
| } |
| |
| /* finish flushes any buffered data in |ctx|. */ |
| static int finish(struct hexdump_ctx *ctx) { |
| /* See the comments in |hexdump| for the details of this format. */ |
| const unsigned n_bytes = ctx->used; |
| unsigned l; |
| char buf[5]; |
| |
| if (n_bytes == 0) { |
| return 1; |
| } |
| |
| OPENSSL_memset(buf, ' ', 4); |
| buf[4] = '|'; |
| |
| for (; ctx->used < 16; ctx->used++) { |
| l = 3; |
| if (ctx->used == 7) { |
| l = 4; |
| } else if (ctx->used == 15) { |
| l = 5; |
| } |
| if (BIO_write(ctx->bio, buf, l) < 0) { |
| return 0; |
| } |
| } |
| |
| ctx->right_chars[n_bytes] = '|'; |
| ctx->right_chars[n_bytes + 1] = '\n'; |
| if (BIO_write(ctx->bio, ctx->right_chars, n_bytes + 2) < 0) { |
| return 0; |
| } |
| return 1; |
| } |
| |
| int BIO_hexdump(BIO *bio, const uint8_t *data, size_t len, unsigned indent) { |
| struct hexdump_ctx ctx; |
| OPENSSL_memset(&ctx, 0, sizeof(ctx)); |
| ctx.bio = bio; |
| ctx.indent = indent; |
| |
| if (!hexdump_write(&ctx, data, len) || !finish(&ctx)) { |
| return 0; |
| } |
| |
| return 1; |
| } |