/src/nss/lib/util/utf8.c

Source (jump to first uncovered line)
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "seccomon.h"
#include "secport.h"

/*
 * From RFC 2044:
 *
 * UCS-4 range (hex.)           UTF-8 octet sequence (binary)
 * 0000 0000-0000 007F   0xxxxxxx
 * 0000 0080-0000 07FF   110xxxxx 10xxxxxx
 * 0000 0800-0000 FFFF   1110xxxx 10xxxxxx 10xxxxxx
 * 0001 0000-001F FFFF   11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
 * 0020 0000-03FF FFFF   111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
 * 0400 0000-7FFF FFFF   1111110x 10xxxxxx ... 10xxxxxx
 */

/*
 * From http://www.imc.org/draft-hoffman-utf16
 *
 * For U on [0x00010000,0x0010FFFF]:  Let U' = U - 0x00010000
 *
 * U' = yyyyyyyyyyxxxxxxxxxx
 * W1 = 110110yyyyyyyyyy
 * W2 = 110111xxxxxxxxxx
 */

/*
 * This code is assuming NETWORK BYTE ORDER for the 16- and 32-bit
 * character values.  If you wish to use this code for working with
 * host byte order values, define the following:
 *
 * #if IS_BIG_ENDIAN
 * #define L_0 0
 * #define L_1 1
 * #define L_2 2
 * #define L_3 3
 * #define H_0 0
 * #define H_1 1
 * #else / * not everyone has elif * /
 * #if IS_LITTLE_ENDIAN
 * #define L_0 3
 * #define L_1 2
 * #define L_2 1
 * #define L_3 0
 * #define H_0 1
 * #define H_1 0
 * #else
 * #error "PDP and NUXI support deferred"
 * #endif / * IS_LITTLE_ENDIAN * /
 * #endif / * IS_BIG_ENDIAN * /
 */

#define L_0 0
#define L_1 1
#define L_2 2
#define L_3 3
#define H_0 0
#define H_1 1

#define BAD_UTF8 ((PRUint32)-1)

/*
 * Parse a single UTF-8 character per the spec. in section 3.9 (D36)
 * of Unicode 4.0.0.
 *
 * Parameters:
 * index - Points to the byte offset in inBuf of character to read.  On success,
 *         updated to the offset of the following character.
 * inBuf - Input buffer, UTF-8 encoded
 * inbufLen - Length of input buffer, in bytes.
 *
 * Returns:
 * Success - The UCS4 encoded character
 * Failure - BAD_UTF8
 */
static PRUint32
sec_port_read_utf8(unsigned int *index, unsigned char *inBuf, unsigned int inBufLen)
{
    PRUint32 result;
    unsigned int i = *index;
    int bytes_left;
    PRUint32 min_value;

    PORT_Assert(i < inBufLen);

    if ((inBuf[i] & 0x80) == 0x00) {
        result = inBuf[i++];
        bytes_left = 0;
        min_value = 0;
    } else if ((inBuf[i] & 0xE0) == 0xC0) {
        result = inBuf[i++] & 0x1F;
        bytes_left = 1;
        min_value = 0x80;
    } else if ((inBuf[i] & 0xF0) == 0xE0) {
        result = inBuf[i++] & 0x0F;
        bytes_left = 2;
        min_value = 0x800;
    } else if ((inBuf[i] & 0xF8) == 0xF0) {
        result = inBuf[i++] & 0x07;
        bytes_left = 3;
        min_value = 0x10000;
    } else {
        return BAD_UTF8;
    }

    while (bytes_left--) {
        if (i >= inBufLen || (inBuf[i] & 0xC0) != 0x80)
            return BAD_UTF8;
        result = (result << 6) | (inBuf[i++] & 0x3F);
    }

    /* Check for overlong sequences, surrogates, and outside unicode range */
    if (result < min_value || (result & 0xFFFFF800) == 0xD800 || result > 0x10FFFF) {
        return BAD_UTF8;
    }

    *index = i;
    return result;
}

PRBool
sec_port_ucs4_utf8_conversion_function(
    PRBool toUnicode,
    unsigned char *inBuf,
    unsigned int inBufLen,
    unsigned char *outBuf,
    unsigned int maxOutBufLen,
    unsigned int *outBufLen)
{
    PORT_Assert((unsigned int *)NULL != outBufLen);

    if (toUnicode) {
        unsigned int i, len = 0;

        for (i = 0; i < inBufLen;) {
            if ((inBuf[i] & 0x80) == 0x00)
                i += 1;
            else if ((inBuf[i] & 0xE0) == 0xC0)
                i += 2;
            else if ((inBuf[i] & 0xF0) == 0xE0)
                i += 3;
            else if ((inBuf[i] & 0xF8) == 0xF0)
                i += 4;
            else
                return PR_FALSE;

            len += 4;
        }

        if (len > maxOutBufLen) {
            *outBufLen = len;
            return PR_FALSE;
        }

        len = 0;

        for (i = 0; i < inBufLen;) {
            PRUint32 ucs4 = sec_port_read_utf8(&i, inBuf, inBufLen);

            if (ucs4 == BAD_UTF8)
                return PR_FALSE;

            outBuf[len + L_0] = 0x00;
            outBuf[len + L_1] = (unsigned char)(ucs4 >> 16);
            outBuf[len + L_2] = (unsigned char)(ucs4 >> 8);
            outBuf[len + L_3] = (unsigned char)ucs4;

            len += 4;
        }

        *outBufLen = len;
        return PR_TRUE;
    } else {
        unsigned int i, len = 0;
        PORT_Assert((inBufLen % 4) == 0);
        if ((inBufLen % 4) != 0) {
            *outBufLen = 0;
            return PR_FALSE;
        }

        for (i = 0; i < inBufLen; i += 4) {
            if ((inBuf[i + L_0] > 0x00) || (inBuf[i + L_1] > 0x10)) {
                *outBufLen = 0;
                return PR_FALSE;
            } else if (inBuf[i + L_1] >= 0x01)
                len += 4;
            else if (inBuf[i + L_2] >= 0x08)
                len += 3;
            else if ((inBuf[i + L_2] > 0x00) || (inBuf[i + L_3] >= 0x80))
                len += 2;
            else
                len += 1;
        }

        if (len > maxOutBufLen) {
            *outBufLen = len;
            return PR_FALSE;
        }

        len = 0;

        for (i = 0; i < inBufLen; i += 4) {
            if (inBuf[i + L_1] >= 0x01) {
                /* 0001 0000-001F FFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
                /* 00000000 000abcde fghijklm nopqrstu ->
                   11110abc 10defghi 10jklmno 10pqrstu */

                outBuf[len + 0] = 0xF0 | ((inBuf[i + L_1] & 0x1C) >> 2);
                outBuf[len + 1] = 0x80 | ((inBuf[i + L_1] & 0x03) << 4) | ((inBuf[i + L_2] & 0xF0) >> 4);
                outBuf[len + 2] = 0x80 | ((inBuf[i + L_2] & 0x0F) << 2) | ((inBuf[i + L_3] & 0xC0) >> 6);
                outBuf[len + 3] = 0x80 | ((inBuf[i + L_3] & 0x3F) >> 0);

                len += 4;
            } else if (inBuf[i + L_2] >= 0x08) {
                /* 0000 0800-0000 FFFF -> 1110xxxx 10xxxxxx 10xxxxxx */
                /* 00000000 00000000 abcdefgh ijklmnop ->
                   1110abcd 10efghij 10klmnop */

                outBuf[len + 0] = 0xE0 | ((inBuf[i + L_2] & 0xF0) >> 4);
                outBuf[len + 1] = 0x80 | ((inBuf[i + L_2] & 0x0F) << 2) | ((inBuf[i + L_3] & 0xC0) >> 6);
                outBuf[len + 2] = 0x80 | ((inBuf[i + L_3] & 0x3F) >> 0);

                len += 3;
            } else if ((inBuf[i + L_2] > 0x00) || (inBuf[i + L_3] >= 0x80)) {
                /* 0000 0080-0000 07FF -> 110xxxxx 10xxxxxx */
                /* 00000000 00000000 00000abc defghijk ->
                   110abcde 10fghijk */

                outBuf[len + 0] = 0xC0 | ((inBuf[i + L_2] & 0x07) << 2) | ((inBuf[i + L_3] & 0xC0) >> 6);
                outBuf[len + 1] = 0x80 | ((inBuf[i + L_3] & 0x3F) >> 0);

                len += 2;
            } else {
                /* 0000 0000-0000 007F -> 0xxxxxx */
                /* 00000000 00000000 00000000 0abcdefg ->
                   0abcdefg */

                outBuf[len + 0] = (inBuf[i + L_3] & 0x7F);

                len += 1;
            }
        }

        *outBufLen = len;
        return PR_TRUE;
    }
}

PRBool
sec_port_ucs2_utf8_conversion_function(
    PRBool toUnicode,
    unsigned char *inBuf,
    unsigned int inBufLen,
    unsigned char *outBuf,
    unsigned int maxOutBufLen,
    unsigned int *outBufLen)
{
    PORT_Assert((unsigned int *)NULL != outBufLen);

    if (toUnicode) {
        unsigned int i, len = 0;

        for (i = 0; i < inBufLen;) {
            if ((inBuf[i] & 0x80) == 0x00) {
                i += 1;
                len += 2;
            } else if ((inBuf[i] & 0xE0) == 0xC0) {
                i += 2;
                len += 2;
            } else if ((inBuf[i] & 0xF0) == 0xE0) {
                i += 3;
                len += 2;
            } else if ((inBuf[i] & 0xF8) == 0xF0) {
                i += 4;
                len += 4;
            } else
                return PR_FALSE;
        }

        if (len > maxOutBufLen) {
            *outBufLen = len;
            return PR_FALSE;
        }

        len = 0;

        for (i = 0; i < inBufLen;) {
            PRUint32 ucs4 = sec_port_read_utf8(&i, inBuf, inBufLen);

            if (ucs4 == BAD_UTF8)
                return PR_FALSE;

            if (ucs4 < 0x10000) {
                outBuf[len + H_0] = (unsigned char)(ucs4 >> 8);
                outBuf[len + H_1] = (unsigned char)ucs4;
                len += 2;
            } else {
                ucs4 -= 0x10000;
                outBuf[len + 0 + H_0] = (unsigned char)(0xD8 | ((ucs4 >> 18) & 0x3));
                outBuf[len + 0 + H_1] = (unsigned char)(ucs4 >> 10);
                outBuf[len + 2 + H_0] = (unsigned char)(0xDC | ((ucs4 >> 8) & 0x3));
                outBuf[len + 2 + H_1] = (unsigned char)ucs4;
                len += 4;
            }
        }

        *outBufLen = len;
        return PR_TRUE;
    } else {
        unsigned int i, len = 0;
        PORT_Assert((inBufLen % 2) == 0);
        if ((inBufLen % 2) != 0) {
            *outBufLen = 0;
            return PR_FALSE;
        }

        for (i = 0; i < inBufLen; i += 2) {
            if ((inBuf[i + H_0] == 0x00) && ((inBuf[i + H_1] & 0x80) == 0x00))
                len += 1;
            else if (inBuf[i + H_0] < 0x08)
                len += 2;
            else if (((inBuf[i + H_0] & 0xFC) == 0xD8)) {
                if (((inBufLen - i) > 2) && ((inBuf[i + 2 + H_0] & 0xFC) == 0xDC)) {
                    i += 2;
                    len += 4;
                } else {
                    return PR_FALSE;
                }
            } else if ((inBuf[i + H_0] & 0xFC) == 0xDC) {
                return PR_FALSE;
            } else {
                len += 3;
            }
        }

        if (len > maxOutBufLen) {
            *outBufLen = len;
            return PR_FALSE;
        }

        len = 0;

        for (i = 0; i < inBufLen; i += 2) {
            if ((inBuf[i + H_0] == 0x00) && ((inBuf[i + H_1] & 0x80) == 0x00)) {
                /* 0000-007F -> 0xxxxxx */
                /* 00000000 0abcdefg -> 0abcdefg */

                outBuf[len] = inBuf[i + H_1] & 0x7F;

                len += 1;
            } else if (inBuf[i + H_0] < 0x08) {
                /* 0080-07FF -> 110xxxxx 10xxxxxx */
                /* 00000abc defghijk -> 110abcde 10fghijk */

                outBuf[len + 0] = 0xC0 | ((inBuf[i + H_0] & 0x07) << 2) | ((inBuf[i + H_1] & 0xC0) >> 6);
                outBuf[len + 1] = 0x80 | ((inBuf[i + H_1] & 0x3F) >> 0);

                len += 2;
            } else if ((inBuf[i + H_0] & 0xFC) == 0xD8) {
                int abcde, BCDE;

                PORT_Assert(((inBufLen - i) > 2) && ((inBuf[i + 2 + H_0] & 0xFC) == 0xDC));

                /* D800-DBFF DC00-DFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
                /* 110110BC DEfghijk 110111lm nopqrstu ->
                   { Let abcde = BCDE + 1 }
                   11110abc 10defghi 10jklmno 10pqrstu */

                BCDE = ((inBuf[i + H_0] & 0x03) << 2) | ((inBuf[i + H_1] & 0xC0) >> 6);
                abcde = BCDE + 1;

                outBuf[len + 0] = 0xF0 | ((abcde & 0x1C) >> 2);
                outBuf[len + 1] = 0x80 | ((abcde & 0x03) << 4) | ((inBuf[i + 0 + H_1] & 0x3C) >> 2);
                outBuf[len + 2] = 0x80 | ((inBuf[i + 0 + H_1] & 0x03) << 4) | ((inBuf[i + 2 + H_0] & 0x03) << 2) | ((inBuf[i + 2 + H_1] & 0xC0) >> 6);
                outBuf[len + 3] = 0x80 | ((inBuf[i + 2 + H_1] & 0x3F) >> 0);

                i += 2;
                len += 4;
            } else {
                /* 0800-FFFF -> 1110xxxx 10xxxxxx 10xxxxxx */
                /* abcdefgh ijklmnop -> 1110abcd 10efghij 10klmnop */

                outBuf[len + 0] = 0xE0 | ((inBuf[i + H_0] & 0xF0) >> 4);
                outBuf[len + 1] = 0x80 | ((inBuf[i + H_0] & 0x0F) << 2) | ((inBuf[i + H_1] & 0xC0) >> 6);
                outBuf[len + 2] = 0x80 | ((inBuf[i + H_1] & 0x3F) >> 0);

                len += 3;
            }
        }

        *outBufLen = len;
        return PR_TRUE;
    }
}

PRBool
sec_port_iso88591_utf8_conversion_function(
    const unsigned char *inBuf,
    unsigned int inBufLen,
    unsigned char *outBuf,
    unsigned int maxOutBufLen,
    unsigned int *outBufLen)
{
    unsigned int i, len = 0;

    PORT_Assert((unsigned int *)NULL != outBufLen);

    for (i = 0; i < inBufLen; i++) {
        if ((inBuf[i] & 0x80) == 0x00)
            len += 1;
        else
            len += 2;
    }

    if (len > maxOutBufLen) {
        *outBufLen = len;
        return PR_FALSE;
    }

    len = 0;

    for (i = 0; i < inBufLen; i++) {
        if ((inBuf[i] & 0x80) == 0x00) {
            /* 00-7F -> 0xxxxxxx */
            /* 0abcdefg -> 0abcdefg */

            outBuf[len] = inBuf[i];
            len += 1;
        } else {
            /* 80-FF <- 110xxxxx 10xxxxxx */
            /* 00000000 abcdefgh -> 110000ab 10cdefgh */

            outBuf[len + 0] = 0xC0 | ((inBuf[i] & 0xC0) >> 6);
            outBuf[len + 1] = 0x80 | ((inBuf[i] & 0x3F) >> 0);

            len += 2;
        }
    }

    *outBufLen = len;
    return PR_TRUE;
}

Coverage Report

Created: 2025-08-18 06:34

Line	Count	Source (jump to first uncovered line)
1		/* This Source Code Form is subject to the terms of the Mozilla Public
2		* License, v. 2.0. If a copy of the MPL was not distributed with this
3		* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
4
5		#include "seccomon.h"
6		#include "secport.h"
7
8		/*
9		* From RFC 2044:
10		*
11		* UCS-4 range (hex.) UTF-8 octet sequence (binary)
12		* 0000 0000-0000 007F 0xxxxxxx
13		* 0000 0080-0000 07FF 110xxxxx 10xxxxxx
14		* 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
15		* 0001 0000-001F FFFF 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
16		* 0020 0000-03FF FFFF 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
17		* 0400 0000-7FFF FFFF 1111110x 10xxxxxx ... 10xxxxxx
18		*/
19
20		/*
21		* From http://www.imc.org/draft-hoffman-utf16
22		*
23		* For U on [0x00010000,0x0010FFFF]: Let U' = U - 0x00010000
24		*
25		* U' = yyyyyyyyyyxxxxxxxxxx
26		* W1 = 110110yyyyyyyyyy
27		* W2 = 110111xxxxxxxxxx
28		*/
29
30		/*
31		* This code is assuming NETWORK BYTE ORDER for the 16- and 32-bit
32		* character values. If you wish to use this code for working with
33		* host byte order values, define the following:
34		*
35		* #if IS_BIG_ENDIAN
36		* #define L_0 0
37		* #define L_1 1
38		* #define L_2 2
39		* #define L_3 3
40		* #define H_0 0
41		* #define H_1 1
42		* #else / * not everyone has elif * /
43		* #if IS_LITTLE_ENDIAN
44		* #define L_0 3
45		* #define L_1 2
46		* #define L_2 1
47		* #define L_3 0
48		* #define H_0 1
49		* #define H_1 0
50		* #else
51		* #error "PDP and NUXI support deferred"
52		* #endif / * IS_LITTLE_ENDIAN * /
53		* #endif / * IS_BIG_ENDIAN * /
54		*/
55
56	0	#define L_0 0
57	0	#define L_1 1
58	0	#define L_2 2
59	0	#define L_3 3
60	0	#define H_0 0
61	0	#define H_1 1
62
63	0	#define BAD_UTF8 ((PRUint32)-1)
64
65		/*
66		* Parse a single UTF-8 character per the spec. in section 3.9 (D36)
67		* of Unicode 4.0.0.
68		*
69		* Parameters:
70		* index - Points to the byte offset in inBuf of character to read. On success,
71		* updated to the offset of the following character.
72		* inBuf - Input buffer, UTF-8 encoded
73		* inbufLen - Length of input buffer, in bytes.
74		*
75		* Returns:
76		* Success - The UCS4 encoded character
77		* Failure - BAD_UTF8
78		*/
79		static PRUint32
80		sec_port_read_utf8(unsigned int index, unsigned char inBuf, unsigned int inBufLen)
81	0	{
82	0	PRUint32 result;
83	0	unsigned int i = *index;
84	0	int bytes_left;
85	0	PRUint32 min_value;
86
87	0	PORT_Assert(i < inBufLen);
88
89	0	if ((inBuf[i] & 0x80) == 0x00) {
90	0	result = inBuf[i++];
91	0	bytes_left = 0;
92	0	min_value = 0;
93	0	} else if ((inBuf[i] & 0xE0) == 0xC0) {
94	0	result = inBuf[i++] & 0x1F;
95	0	bytes_left = 1;
96	0	min_value = 0x80;
97	0	} else if ((inBuf[i] & 0xF0) == 0xE0) {
98	0	result = inBuf[i++] & 0x0F;
99	0	bytes_left = 2;
100	0	min_value = 0x800;
101	0	} else if ((inBuf[i] & 0xF8) == 0xF0) {
102	0	result = inBuf[i++] & 0x07;
103	0	bytes_left = 3;
104	0	min_value = 0x10000;
105	0	} else {
106	0	return BAD_UTF8;
107	0	}
108
109	0	while (bytes_left--) {
110	0	if (i >= inBufLen \|\| (inBuf[i] & 0xC0) != 0x80)
111	0	return BAD_UTF8;
112	0	result = (result << 6) \| (inBuf[i++] & 0x3F);
113	0	}
114
115		/* Check for overlong sequences, surrogates, and outside unicode range */
116	0	if (result < min_value \|\| (result & 0xFFFFF800) == 0xD800 \|\| result > 0x10FFFF) {
117	0	return BAD_UTF8;
118	0	}
119
120	0	*index = i;
121	0	return result;
122	0	}
123
124		PRBool
125		sec_port_ucs4_utf8_conversion_function(
126		PRBool toUnicode,
127		unsigned char *inBuf,
128		unsigned int inBufLen,
129		unsigned char *outBuf,
130		unsigned int maxOutBufLen,
131		unsigned int *outBufLen)
132	0	{
133	0	PORT_Assert((unsigned int *)NULL != outBufLen);
134
135	0	if (toUnicode) {
136	0	unsigned int i, len = 0;
137
138	0	for (i = 0; i < inBufLen;) {
139	0	if ((inBuf[i] & 0x80) == 0x00)
140	0	i += 1;
141	0	else if ((inBuf[i] & 0xE0) == 0xC0)
142	0	i += 2;
143	0	else if ((inBuf[i] & 0xF0) == 0xE0)
144	0	i += 3;
145	0	else if ((inBuf[i] & 0xF8) == 0xF0)
146	0	i += 4;
147	0	else
148	0	return PR_FALSE;
149
150	0	len += 4;
151	0	}
152
153	0	if (len > maxOutBufLen) {
154	0	*outBufLen = len;
155	0	return PR_FALSE;
156	0	}
157
158	0	len = 0;
159
160	0	for (i = 0; i < inBufLen;) {
161	0	PRUint32 ucs4 = sec_port_read_utf8(&i, inBuf, inBufLen);
162
163	0	if (ucs4 == BAD_UTF8)
164	0	return PR_FALSE;
165
166	0	outBuf[len + L_0] = 0x00;
167	0	outBuf[len + L_1] = (unsigned char)(ucs4 >> 16);
168	0	outBuf[len + L_2] = (unsigned char)(ucs4 >> 8);
169	0	outBuf[len + L_3] = (unsigned char)ucs4;
170
171	0	len += 4;
172	0	}
173
174	0	*outBufLen = len;
175	0	return PR_TRUE;
176	0	} else {
177	0	unsigned int i, len = 0;
178	0	PORT_Assert((inBufLen % 4) == 0);
179	0	if ((inBufLen % 4) != 0) {
180	0	*outBufLen = 0;
181	0	return PR_FALSE;
182	0	}
183
184	0	for (i = 0; i < inBufLen; i += 4) {
185	0	if ((inBuf[i + L_0] > 0x00) \|\| (inBuf[i + L_1] > 0x10)) {
186	0	*outBufLen = 0;
187	0	return PR_FALSE;
188	0	} else if (inBuf[i + L_1] >= 0x01)
189	0	len += 4;
190	0	else if (inBuf[i + L_2] >= 0x08)
191	0	len += 3;
192	0	else if ((inBuf[i + L_2] > 0x00) \|\| (inBuf[i + L_3] >= 0x80))
193	0	len += 2;
194	0	else
195	0	len += 1;
196	0	}
197
198	0	if (len > maxOutBufLen) {
199	0	*outBufLen = len;
200	0	return PR_FALSE;
201	0	}
202
203	0	len = 0;
204
205	0	for (i = 0; i < inBufLen; i += 4) {
206	0	if (inBuf[i + L_1] >= 0x01) {
207		/* 0001 0000-001F FFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
208		/* 00000000 000abcde fghijklm nopqrstu ->
209		11110abc 10defghi 10jklmno 10pqrstu */
210
211	0	outBuf[len + 0] = 0xF0 \| ((inBuf[i + L_1] & 0x1C) >> 2);
212	0	outBuf[len + 1] = 0x80 \| ((inBuf[i + L_1] & 0x03) << 4) \| ((inBuf[i + L_2] & 0xF0) >> 4);
213	0	outBuf[len + 2] = 0x80 \| ((inBuf[i + L_2] & 0x0F) << 2) \| ((inBuf[i + L_3] & 0xC0) >> 6);
214	0	outBuf[len + 3] = 0x80 \| ((inBuf[i + L_3] & 0x3F) >> 0);
215
216	0	len += 4;
217	0	} else if (inBuf[i + L_2] >= 0x08) {
218		/* 0000 0800-0000 FFFF -> 1110xxxx 10xxxxxx 10xxxxxx */
219		/* 00000000 00000000 abcdefgh ijklmnop ->
220		1110abcd 10efghij 10klmnop */
221
222	0	outBuf[len + 0] = 0xE0 \| ((inBuf[i + L_2] & 0xF0) >> 4);
223	0	outBuf[len + 1] = 0x80 \| ((inBuf[i + L_2] & 0x0F) << 2) \| ((inBuf[i + L_3] & 0xC0) >> 6);
224	0	outBuf[len + 2] = 0x80 \| ((inBuf[i + L_3] & 0x3F) >> 0);
225
226	0	len += 3;
227	0	} else if ((inBuf[i + L_2] > 0x00) \|\| (inBuf[i + L_3] >= 0x80)) {
228		/* 0000 0080-0000 07FF -> 110xxxxx 10xxxxxx */
229		/* 00000000 00000000 00000abc defghijk ->
230		110abcde 10fghijk */
231
232	0	outBuf[len + 0] = 0xC0 \| ((inBuf[i + L_2] & 0x07) << 2) \| ((inBuf[i + L_3] & 0xC0) >> 6);
233	0	outBuf[len + 1] = 0x80 \| ((inBuf[i + L_3] & 0x3F) >> 0);
234
235	0	len += 2;
236	0	} else {
237		/* 0000 0000-0000 007F -> 0xxxxxx */
238		/* 00000000 00000000 00000000 0abcdefg ->
239		0abcdefg */
240
241	0	outBuf[len + 0] = (inBuf[i + L_3] & 0x7F);
242
243	0	len += 1;
244	0	}
245	0	}
246
247	0	*outBufLen = len;
248	0	return PR_TRUE;
249	0	}
250	0	}
251
252		PRBool
253		sec_port_ucs2_utf8_conversion_function(
254		PRBool toUnicode,
255		unsigned char *inBuf,
256		unsigned int inBufLen,
257		unsigned char *outBuf,
258		unsigned int maxOutBufLen,
259		unsigned int *outBufLen)
260	0	{
261	0	PORT_Assert((unsigned int *)NULL != outBufLen);
262
263	0	if (toUnicode) {
264	0	unsigned int i, len = 0;
265
266	0	for (i = 0; i < inBufLen;) {
267	0	if ((inBuf[i] & 0x80) == 0x00) {
268	0	i += 1;
269	0	len += 2;
270	0	} else if ((inBuf[i] & 0xE0) == 0xC0) {
271	0	i += 2;
272	0	len += 2;
273	0	} else if ((inBuf[i] & 0xF0) == 0xE0) {
274	0	i += 3;
275	0	len += 2;
276	0	} else if ((inBuf[i] & 0xF8) == 0xF0) {
277	0	i += 4;
278	0	len += 4;
279	0	} else
280	0	return PR_FALSE;
281	0	}
282
283	0	if (len > maxOutBufLen) {
284	0	*outBufLen = len;
285	0	return PR_FALSE;
286	0	}
287
288	0	len = 0;
289
290	0	for (i = 0; i < inBufLen;) {
291	0	PRUint32 ucs4 = sec_port_read_utf8(&i, inBuf, inBufLen);
292
293	0	if (ucs4 == BAD_UTF8)
294	0	return PR_FALSE;
295
296	0	if (ucs4 < 0x10000) {
297	0	outBuf[len + H_0] = (unsigned char)(ucs4 >> 8);
298	0	outBuf[len + H_1] = (unsigned char)ucs4;
299	0	len += 2;
300	0	} else {
301	0	ucs4 -= 0x10000;
302	0	outBuf[len + 0 + H_0] = (unsigned char)(0xD8 \| ((ucs4 >> 18) & 0x3));
303	0	outBuf[len + 0 + H_1] = (unsigned char)(ucs4 >> 10);
304	0	outBuf[len + 2 + H_0] = (unsigned char)(0xDC \| ((ucs4 >> 8) & 0x3));
305	0	outBuf[len + 2 + H_1] = (unsigned char)ucs4;
306	0	len += 4;
307	0	}
308	0	}
309
310	0	*outBufLen = len;
311	0	return PR_TRUE;
312	0	} else {
313	0	unsigned int i, len = 0;
314	0	PORT_Assert((inBufLen % 2) == 0);
315	0	if ((inBufLen % 2) != 0) {
316	0	*outBufLen = 0;
317	0	return PR_FALSE;
318	0	}
319
320	0	for (i = 0; i < inBufLen; i += 2) {
321	0	if ((inBuf[i + H_0] == 0x00) && ((inBuf[i + H_1] & 0x80) == 0x00))
322	0	len += 1;
323	0	else if (inBuf[i + H_0] < 0x08)
324	0	len += 2;
325	0	else if (((inBuf[i + H_0] & 0xFC) == 0xD8)) {
326	0	if (((inBufLen - i) > 2) && ((inBuf[i + 2 + H_0] & 0xFC) == 0xDC)) {
327	0	i += 2;
328	0	len += 4;
329	0	} else {
330	0	return PR_FALSE;
331	0	}
332	0	} else if ((inBuf[i + H_0] & 0xFC) == 0xDC) {
333	0	return PR_FALSE;
334	0	} else {
335	0	len += 3;
336	0	}
337	0	}
338
339	0	if (len > maxOutBufLen) {
340	0	*outBufLen = len;
341	0	return PR_FALSE;
342	0	}
343
344	0	len = 0;
345
346	0	for (i = 0; i < inBufLen; i += 2) {
347	0	if ((inBuf[i + H_0] == 0x00) && ((inBuf[i + H_1] & 0x80) == 0x00)) {
348		/* 0000-007F -> 0xxxxxx */
349		/* 00000000 0abcdefg -> 0abcdefg */
350
351	0	outBuf[len] = inBuf[i + H_1] & 0x7F;
352
353	0	len += 1;
354	0	} else if (inBuf[i + H_0] < 0x08) {
355		/* 0080-07FF -> 110xxxxx 10xxxxxx */
356		/* 00000abc defghijk -> 110abcde 10fghijk */
357
358	0	outBuf[len + 0] = 0xC0 \| ((inBuf[i + H_0] & 0x07) << 2) \| ((inBuf[i + H_1] & 0xC0) >> 6);
359	0	outBuf[len + 1] = 0x80 \| ((inBuf[i + H_1] & 0x3F) >> 0);
360
361	0	len += 2;
362	0	} else if ((inBuf[i + H_0] & 0xFC) == 0xD8) {
363	0	int abcde, BCDE;
364
365	0	PORT_Assert(((inBufLen - i) > 2) && ((inBuf[i + 2 + H_0] & 0xFC) == 0xDC));
366
367		/* D800-DBFF DC00-DFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
368		/* 110110BC DEfghijk 110111lm nopqrstu ->
369		{ Let abcde = BCDE + 1 }
370		11110abc 10defghi 10jklmno 10pqrstu */
371
372	0	BCDE = ((inBuf[i + H_0] & 0x03) << 2) \| ((inBuf[i + H_1] & 0xC0) >> 6);
373	0	abcde = BCDE + 1;
374
375	0	outBuf[len + 0] = 0xF0 \| ((abcde & 0x1C) >> 2);
376	0	outBuf[len + 1] = 0x80 \| ((abcde & 0x03) << 4) \| ((inBuf[i + 0 + H_1] & 0x3C) >> 2);
377	0	outBuf[len + 2] = 0x80 \| ((inBuf[i + 0 + H_1] & 0x03) << 4) \| ((inBuf[i + 2 + H_0] & 0x03) << 2) \| ((inBuf[i + 2 + H_1] & 0xC0) >> 6);
378	0	outBuf[len + 3] = 0x80 \| ((inBuf[i + 2 + H_1] & 0x3F) >> 0);
379
380	0	i += 2;
381	0	len += 4;
382	0	} else {
383		/* 0800-FFFF -> 1110xxxx 10xxxxxx 10xxxxxx */
384		/* abcdefgh ijklmnop -> 1110abcd 10efghij 10klmnop */
385
386	0	outBuf[len + 0] = 0xE0 \| ((inBuf[i + H_0] & 0xF0) >> 4);
387	0	outBuf[len + 1] = 0x80 \| ((inBuf[i + H_0] & 0x0F) << 2) \| ((inBuf[i + H_1] & 0xC0) >> 6);
388	0	outBuf[len + 2] = 0x80 \| ((inBuf[i + H_1] & 0x3F) >> 0);
389
390	0	len += 3;
391	0	}
392	0	}
393
394	0	*outBufLen = len;
395	0	return PR_TRUE;
396	0	}
397	0	}
398
399		PRBool
400		sec_port_iso88591_utf8_conversion_function(
401		const unsigned char *inBuf,
402		unsigned int inBufLen,
403		unsigned char *outBuf,
404		unsigned int maxOutBufLen,
405		unsigned int *outBufLen)
406	0	{
407	0	unsigned int i, len = 0;
408
409	0	PORT_Assert((unsigned int *)NULL != outBufLen);
410
411	0	for (i = 0; i < inBufLen; i++) {
412	0	if ((inBuf[i] & 0x80) == 0x00)
413	0	len += 1;
414	0	else
415	0	len += 2;
416	0	}
417
418	0	if (len > maxOutBufLen) {
419	0	*outBufLen = len;
420	0	return PR_FALSE;
421	0	}
422
423	0	len = 0;
424
425	0	for (i = 0; i < inBufLen; i++) {
426	0	if ((inBuf[i] & 0x80) == 0x00) {
427		/* 00-7F -> 0xxxxxxx */
428		/* 0abcdefg -> 0abcdefg */
429
430	0	outBuf[len] = inBuf[i];
431	0	len += 1;
432	0	} else {
433		/* 80-FF <- 110xxxxx 10xxxxxx */
434		/* 00000000 abcdefgh -> 110000ab 10cdefgh */
435
436	0	outBuf[len + 0] = 0xC0 \| ((inBuf[i] & 0xC0) >> 6);
437	0	outBuf[len + 1] = 0x80 \| ((inBuf[i] & 0x3F) >> 0);
438
439	0	len += 2;
440	0	}
441	0	}
442
443	0	*outBufLen = len;
444	0	return PR_TRUE;
445	0	}