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Diffstat (limited to 'src/crypto/bio/hexdump.c')
| -rw-r--r-- | src/crypto/bio/hexdump.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/src/crypto/bio/hexdump.c b/src/crypto/bio/hexdump.c new file mode 100644 index 0000000..17f5518 --- /dev/null +++ b/src/crypto/bio/hexdump.c @@ -0,0 +1,192 @@ +/* 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; +} |