1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) Jeremy Harris 2015 */
6 /* See the file NOTICE for conditions of use and distribution. */
11 #ifdef EXPERIMENTAL_INTERNATIONAL
15 #include <stringprep.h>
18 string_is_utf8(const uschar
* s
)
21 while ((c
= *s
++)) if (c
& 0x80) return TRUE
;
25 /**************************************************/
26 /* Domain conversions */
27 /* the *err string pointer should be null before the call */
30 string_domain_utf8_to_alabel(const uschar
* utf8
, uschar
** err
)
36 s
= US
stringprep_utf8_nfkc_normalize(CCS utf8
, -1);
37 if ( (rc
= idna_to_ascii_8z(CCS s
, CSS
&s1
, IDNA_ALLOW_UNASSIGNED
))
41 if (err
) *err
= US
idna_strerror(rc
);
53 string_domain_alabel_to_utf8(const uschar
* alabel
, uschar
** err
)
59 if ( (rc
= idna_to_unicode_8z8z(CCS alabel
, CSS
&s1
, IDNA_USE_STD3_ASCII_RULES
))
62 if (err
) *err
= US
idna_strerror(rc
);
70 /**************************************************/
71 /* localpart conversions */
72 /* the *err string pointer should be null before the call */
76 string_localpart_utf8_to_alabel(const uschar
* utf8
, uschar
** err
)
79 punycode_uint
* p
= (punycode_uint
*) stringprep_utf8_to_ucs4(CCS utf8
, -1, &ucs4_len
);
80 size_t p_len
= ucs4_len
*4; /* this multiplier is pure guesswork */
81 uschar
* res
= store_get(p_len
+5);
84 res
[0] = 'x'; res
[1] = 'n'; res
[2] = res
[3] = '-';
86 if ((rc
= punycode_encode(ucs4_len
, p
, NULL
, &p_len
, res
+4)) != PUNYCODE_SUCCESS
)
88 DEBUG(D_expand
) debug_printf("l_u2a: bad '%s'\n", punycode_strerror(rc
));
90 if (err
) *err
= US
punycode_strerror(rc
);
101 string_localpart_alabel_to_utf8(const uschar
* alabel
, uschar
** err
)
103 size_t p_len
= strlen(alabel
);
109 if (alabel
[0] != 'x' || alabel
[1] != 'n' || alabel
[2] != '-' || alabel
[3] != '-')
111 if (err
) *err
= US
"bad alabel prefix";
116 p
= (punycode_uint
*) store_get((p_len
+1) * sizeof(*p
));
118 if ((rc
= punycode_decode(p_len
, CCS alabel
+4, &p_len
, p
, NULL
)) != PUNYCODE_SUCCESS
)
120 if (err
) *err
= US
punycode_strerror(rc
);
124 s
= stringprep_ucs4_to_utf8(p
, p_len
, NULL
, &p_len
);
125 res
= string_copyn(s
, p_len
);
131 /**************************************************/
132 /* whole address conversion */
133 /* the *err string pointer should be null before the call */
136 string_address_utf8_to_alabel(const uschar
* utf8
, uschar
** err
)
142 for (s
= utf8
; *s
; s
++)
145 l
= string_copyn(utf8
, s
- utf8
);
146 return (l
= string_localpart_utf8_to_alabel(l
, err
), err
&& *err
)
147 || (d
= string_domain_utf8_to_alabel(++s
, err
), err
&& *err
)
149 : string_sprintf("%s@%s", l
, d
);
151 return string_localpart_utf8_to_alabel(utf8
, err
);
156 /*************************************************
157 * Report the library versions. *
158 *************************************************/
160 /* See a description in tls-openssl.c for an explanation of why this exists.
162 Arguments: a FILE* to print the results to
167 utf8_version_report(FILE *f
)
169 fprintf(f
, "Library version: IDN: Compile: %s\n"
172 stringprep_check_version(NULL
));
175 #endif /* whole file */