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-rw-r--r--source4/lib/iconv.c262
1 files changed, 197 insertions, 65 deletions
diff --git a/source4/lib/iconv.c b/source4/lib/iconv.c
index c869c253cf..9f6526faa5 100644
--- a/source4/lib/iconv.c
+++ b/source4/lib/iconv.c
@@ -39,8 +39,8 @@
*
* Note that the only function provided by iconv is conversion between
* characters. It doesn't directly support operations like
- * uppercasing or comparison. We have to convert to UCS-2 and compare
- * there.
+ * uppercasing or comparison. We have to convert to UTF-16LE and
+ * compare there.
*
* @sa Samba Developers Guide
**/
@@ -55,10 +55,11 @@ static size_t iconv_copy (void *,const char **, size_t *, char **, size_t *);
static size_t iconv_swab (void *,const char **, size_t *, char **, size_t *);
static const struct charset_functions const builtin_functions[] = {
- /* windows is really neither UCS-2 not UTF-16 */
+ /* windows is closest to UTF-16 */
{"UCS-2LE", iconv_copy, iconv_copy},
{"UTF-16LE", iconv_copy, iconv_copy},
{"UCS-2BE", iconv_swab, iconv_swab},
+ {"UTF-16BE", iconv_swab, iconv_swab},
/* we include the UTF-8 alias to cope with differing locale settings */
{"UTF8", utf8_pull, utf8_push},
@@ -217,23 +218,23 @@ smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode)
#endif
/* check for conversion to/from ucs2 */
- if (strcasecmp(fromcode, "UCS-2LE") == 0 && to) {
+ if (strcasecmp(fromcode, "UTF-16LE") == 0 && to) {
ret->direct = to->push;
return ret;
}
- if (strcasecmp(tocode, "UCS-2LE") == 0 && from) {
+ if (strcasecmp(tocode, "UTF-16LE") == 0 && from) {
ret->direct = from->pull;
return ret;
}
#ifdef HAVE_NATIVE_ICONV
- if (strcasecmp(fromcode, "UCS-2LE") == 0) {
+ if (strcasecmp(fromcode, "UTF-16LE") == 0) {
ret->direct = sys_iconv;
ret->cd_direct = ret->cd_push;
ret->cd_push = NULL;
return ret;
}
- if (strcasecmp(tocode, "UCS-2LE") == 0) {
+ if (strcasecmp(tocode, "UTF-16LE") == 0) {
ret->direct = sys_iconv;
ret->cd_direct = ret->cd_pull;
ret->cd_pull = NULL;
@@ -460,100 +461,231 @@ static size_t iconv_copy(void *cd, const char **inbuf, size_t *inbytesleft,
static size_t utf8_pull(void *cd, const char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft)
{
- while (*inbytesleft >= 1 && *outbytesleft >= 2) {
- const uint8_t *c = (const uint8_t *)*inbuf;
- uint8_t *uc = (uint8_t *)*outbuf;
- int len = 1;
+ size_t in_left=*inbytesleft, out_left=*outbytesleft;
+ const uint8_t *c = (const uint8_t *)*inbuf;
+ uint8_t *uc = (uint8_t *)*outbuf;
+ while (in_left >= 1 && out_left >= 2) {
if ((c[0] & 0x80) == 0) {
uc[0] = c[0];
uc[1] = 0;
- } else if ((c[0] & 0xf0) == 0xe0) {
- if (*inbytesleft < 3) {
- DEBUG(0,("short utf8 char\n"));
- goto badseq;
+ c += 1;
+ in_left -= 1;
+ out_left -= 2;
+ uc += 2;
+ continue;
+ }
+
+ if ((c[0] & 0xe0) == 0xc0) {
+ if (in_left < 2 ||
+ (c[1] & 0xc0) != 0x80) {
+ errno = EILSEQ;
+ goto error;
+ }
+ uc[1] = (c[0]>>2) & 0x7;
+ uc[0] = (c[0]<<6) | (c[1]&0x3f);
+ c += 2;
+ in_left -= 2;
+ out_left -= 2;
+ uc += 2;
+ continue;
+ }
+
+ if ((c[0] & 0xf0) == 0xe0) {
+ if (in_left < 3 ||
+ (c[1] & 0xc0) != 0x80 ||
+ (c[2] & 0xc0) != 0x80) {
+ errno = EILSEQ;
+ goto error;
}
uc[1] = ((c[0]&0xF)<<4) | ((c[1]>>2)&0xF);
uc[0] = (c[1]<<6) | (c[2]&0x3f);
- len = 3;
- } else if ((c[0] & 0xe0) == 0xc0) {
- if (*inbytesleft < 2) {
- DEBUG(0,("short utf8 char\n"));
- goto badseq;
+ c += 3;
+ in_left -= 3;
+ out_left -= 2;
+ uc += 2;
+ continue;
+ }
+
+ if ((c[0] & 0xf8) == 0xf0) {
+ unsigned int codepoint;
+ if (in_left < 4 ||
+ (c[1] & 0xc0) != 0x80 ||
+ (c[2] & 0xc0) != 0x80 ||
+ (c[3] & 0xc0) != 0x80) {
+ errno = EILSEQ;
+ goto error;
}
- uc[1] = (c[0]>>2) & 0x7;
- uc[0] = (c[0]<<6) | (c[1]&0x3f);
- len = 2;
+ codepoint =
+ (c[3]&0x3f) |
+ ((c[2]&0x3f)<<6) |
+ ((c[1]&0x3f)<<12) |
+ ((c[0]&0x7)<<18);
+ if (codepoint < 0x10000) {
+ /* accept UTF-8 characters that are not
+ minimally packed, but pack the result */
+ uc[0] = (codepoint & 0xFF);
+ uc[1] = (codepoint >> 8);
+ c += 4;
+ in_left -= 4;
+ out_left -= 2;
+ uc += 2;
+ continue;
+ }
+
+ codepoint -= 0x10000;
+
+ if (out_left < 4) {
+ errno = E2BIG;
+ goto error;
+ }
+
+ uc[0] = (codepoint>>10) & 0xFF;
+ uc[1] = (codepoint>>18) | 0xd8;
+ uc[2] = codepoint & 0xFF;
+ uc[3] = ((codepoint>>8) & 0x3) | 0xdc;
+ c += 4;
+ in_left -= 4;
+ out_left -= 4;
+ uc += 4;
+ continue;
}
- (*inbuf) += len;
- (*inbytesleft) -= len;
- (*outbytesleft) -= 2;
- (*outbuf) += 2;
+ /* we don't handle 5 byte sequences */
+ errno = EINVAL;
+ goto error;
}
- if (*inbytesleft > 0) {
+ if (in_left > 0) {
errno = E2BIG;
- return -1;
+ goto error;
}
-
+
+ *inbytesleft = in_left;
+ *outbytesleft = out_left;
+ *inbuf = c;
+ *outbuf = uc;
return 0;
-badseq:
- errno = EINVAL;
+error:
+ *inbytesleft = in_left;
+ *outbytesleft = out_left;
+ *inbuf = c;
+ *outbuf = uc;
return -1;
}
static size_t utf8_push(void *cd, const char **inbuf, size_t *inbytesleft,
- char **outbuf, size_t *outbytesleft)
+ char **outbuf, size_t *outbytesleft)
{
- while (*inbytesleft >= 2 && *outbytesleft >= 1) {
- uint8_t *c = (uint8_t *)*outbuf;
- const uint8_t *uc = (const uint8_t *)*inbuf;
- int len=1;
-
- if (uc[1] & 0xf8) {
- if (*outbytesleft < 3) {
- DEBUG(0,("short utf8 write\n"));
- goto toobig;
+ size_t in_left=*inbytesleft, out_left=*outbytesleft;
+ uint8_t *c = (uint8_t *)*outbuf;
+ const uint8_t *uc = (const uint8_t *)*inbuf;
+
+ while (in_left >= 2 && out_left >= 1) {
+ unsigned int codepoint;
+
+ if (uc[1] == 0 && !(uc[0] & 0x80)) {
+ /* simplest case */
+ c[0] = uc[0];
+ in_left -= 2;
+ out_left -= 1;
+ uc += 2;
+ c += 1;
+ continue;
+ }
+
+ if ((uc[1]&0xf8) == 0) {
+ /* next simplest case */
+ if (out_left < 2) {
+ errno = E2BIG;
+ goto error;
}
- c[0] = 0xe0 | (uc[1]>>4);
- c[1] = 0x80 | ((uc[1]&0xF)<<2) | (uc[0]>>6);
- c[2] = 0x80 | (uc[0]&0x3f);
- len = 3;
- } else if (uc[1] | (uc[0] & 0x80)) {
- if (*outbytesleft < 2) {
- DEBUG(0,("short utf8 write\n"));
- goto toobig;
+ c[0] = 0xc0 | (uc[0]>>6) | (uc[1]<<2);
+ c[1] = 0x80 | (uc[0] & 0x3f);
+ in_left -= 2;
+ out_left -= 2;
+ uc += 2;
+ c += 2;
+ continue;
+ }
+
+ if ((uc[1] & 0xfc) == 0xdc) {
+ /* its the second part of a 4 byte sequence. Illegal */
+ if (in_left < 4) {
+ errno = EINVAL;
+ } else {
+ errno = EILSEQ;
}
- c[0] = 0xc0 | (uc[1]<<2) | (uc[0]>>6);
- c[1] = 0x80 | (uc[0]&0x3f);
- len = 2;
- } else {
- c[0] = uc[0];
+ goto error;
}
+ if ((uc[1] & 0xfc) != 0xd8) {
+ codepoint = uc[0] | (uc[1]<<8);
+ if (out_left < 3) {
+ errno = E2BIG;
+ goto error;
+ }
+ c[0] = 0xe0 | (codepoint >> 12);
+ c[1] = 0x80 | ((codepoint >> 6) & 0x3f);
+ c[2] = 0x80 | (codepoint & 0x3f);
+
+ in_left -= 2;
+ out_left -= 3;
+ uc += 2;
+ c += 3;
+ continue;
+ }
- (*inbytesleft) -= 2;
- (*outbytesleft) -= len;
- (*inbuf) += 2;
- (*outbuf) += len;
+ /* its the first part of a 4 byte sequence */
+ if (in_left < 4) {
+ errno = EINVAL;
+ goto error;
+ }
+ if ((uc[3] & 0xfc) != 0xdc) {
+ errno = EILSEQ;
+ goto error;
+ }
+ codepoint = 0x10000 + (uc[2] | ((uc[3] & 0x3)<<8) |
+ (uc[0]<<10) | ((uc[1] & 0x3)<<18));
+
+ if (out_left < 4) {
+ errno = E2BIG;
+ goto error;
+ }
+ c[0] = 0xf0 | (codepoint >> 18);
+ c[1] = 0x80 | ((codepoint >> 12) & 0x3f);
+ c[2] = 0x80 | ((codepoint >> 6) & 0x3f);
+ c[3] = 0x80 | (codepoint & 0x3f);
+
+ in_left -= 4;
+ out_left -= 4;
+ uc += 4;
+ c += 4;
}
- if (*inbytesleft == 1) {
+ if (in_left == 1) {
errno = EINVAL;
- return -1;
+ goto error;
}
- if (*inbytesleft > 1) {
+ if (in_left > 1) {
errno = E2BIG;
- return -1;
+ goto error;
}
+
+ *inbytesleft = in_left;
+ *outbytesleft = out_left;
+ *inbuf = uc;
+ *outbuf = c;
return 0;
-toobig:
- errno = E2BIG;
+error:
+ *inbytesleft = in_left;
+ *outbytesleft = out_left;
+ *inbuf = uc;
+ *outbuf = c;
return -1;
}
generated by cgit (git 2.34.1) at 2024-11-03 06:15:23 +0000