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- /* 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>
-
-
- /* 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) {
- size_t i;
- 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 (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;
- }
-
- 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;
- memset(&ctx, 0, sizeof(ctx));
- ctx.bio = bio;
- ctx.indent = indent;
-
- if (!hexdump_write(&ctx, data, len) || !finish(&ctx)) {
- return 0;
- }
-
- return 1;
- }
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