/*

 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

/*

 * Stolen from tjh's ssl/ssl_trc.c stuff.

 */

#include <stdio.h>

#include "bio_local.h"

#define DUMP_WIDTH      16

#define DUMP_WIDTH_LESS_INDENT(i) (DUMP_WIDTH - ((i - (i > 6 ? 6 : i) + 3) / 4))

#define SPACE(buf, pos, n)   (sizeof(buf) - (pos) > (n))

int BIO_dump_cb(int (*cb) (const void *data, size_t len, void *u),

                void *u, const void *s, int len)

{

    return BIO_dump_indent_cb(cb, u, s, len, 0);

}

int BIO_dump_indent_cb(int (*cb) (const void *data, size_t len, void *u),

                       void *u, const void *v, int len, int indent)

{

    const unsigned char *s = v;

    int res, ret = 0;

    char buf[288 + 1];

    int i, j, rows, n;

    unsigned char ch;

    int dump_width;

    if (indent < 0)

        indent = 0;

    else if (indent > 64)

        indent = 64;

    dump_width = DUMP_WIDTH_LESS_INDENT(indent);

    rows = len / dump_width;

    if ((rows * dump_width) < len)

        rows++;

    for (i = 0; i < rows; i++) {

        n = BIO_snprintf(buf, sizeof(buf), "%*s%04x - ", indent, "",

                         i * dump_width);

        if (n < 0)

            return -1;

        for (j = 0; j < dump_width; j++) {

            if (SPACE(buf, n, 3)) {

                if (((i * dump_width) + j) >= len) {

                    strcpy(buf + n, "   ");

                } else {

                    ch = *(s + i * dump_width + j) & 0xff;

                    BIO_snprintf(buf + n, 4, "%02x%c", ch,

                                 j == 7 ? '-' : ' ');

                }

                n += 3;

            }

        }

        if (SPACE(buf, n, 2)) {

            strcpy(buf + n, "  ");

            n += 2;

        }

        for (j = 0; j < dump_width; j++) {

            if (((i * dump_width) + j) >= len)

                break;

            if (SPACE(buf, n, 1)) {

                ch = *(s + i * dump_width + j) & 0xff;

#ifndef CHARSET_EBCDIC

                buf[n++] = ((ch >= ' ') && (ch <= '~')) ? ch : '.';

#else

                buf[n++] = ((ch >= os_toascii[' ']) && (ch <= os_toascii['~']))

                           ? os_toebcdic[ch]

                           : '.';

#endif

                buf[n] = '\0';

            }

        }

        if (SPACE(buf, n, 1)) {

            buf[n++] = '\n';

            buf[n] = '\0';

        }

        /*

         * if this is the last call then update the ddt_dump thing so that we

         * will move the selection point in the debug window

         */

        res = cb((void *)buf, n, u);

        if (res < 0)

            return res;

        ret += res;

    }

    return ret;

}

#ifndef OPENSSL_NO_STDIO

static int write_fp(const void *data, size_t len, void *fp)

{

    return UP_fwrite(data, len, 1, fp);

}

int BIO_dump_fp(FILE *fp, const void *s, int len)

{

    return BIO_dump_cb(write_fp, fp, s, len);

}

int BIO_dump_indent_fp(FILE *fp, const void *s, int len, int indent)

{

    return BIO_dump_indent_cb(write_fp, fp, s, len, indent);

}

#endif

static int write_bio(const void *data, size_t len, void *bp)

{

    return BIO_write((BIO *)bp, (const char *)data, len);

}

int BIO_dump(BIO *bp, const void *s, int len)

{

    return BIO_dump_cb(write_bio, bp, s, len);

}

int BIO_dump_indent(BIO *bp, const void *s, int len, int indent)

{

    return BIO_dump_indent_cb(write_bio, bp, s, len, indent);

}

int BIO_hex_string(BIO *out, int indent, int width, const void *data,

                   int datalen)

{

    const unsigned char *d = data;

    int i, j = 0;

    if (datalen < 1)

        return 1;

    for (i = 0; i < datalen - 1; i++) {

        if (i && !j)

            BIO_printf(out, "%*s", indent, "");

        BIO_printf(out, "%02X:", d[i]);

        j = (j + 1) % width;

        if (!j)

            BIO_printf(out, "\n");

    }

    if (i && !j)

        BIO_printf(out, "%*s", indent, "");

    BIO_printf(out, "%02X", d[datalen - 1]);

    return 1;

}