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-rw-r--r--source3/lib/charcnv.c126
1 files changed, 92 insertions, 34 deletions
diff --git a/source3/lib/charcnv.c b/source3/lib/charcnv.c
index ca5e378970..2b313d8ccf 100644
--- a/source3/lib/charcnv.c
+++ b/source3/lib/charcnv.c
@@ -154,6 +154,9 @@ void init_iconv(void)
* @param dest pointer to destination string (multibyte or singlebyte)
* @param destlen maximal length allowed for string
* @returns the number of bytes occupied in the destination
+ *
+ * Ensure the srclen contains the terminating zero.
+ *
**/
size_t convert_string(charset_t from, charset_t to,
void const *src, size_t srclen,
@@ -167,16 +170,16 @@ size_t convert_string(charset_t from, charset_t to,
if (srclen == (size_t)-1)
srclen = strlen(src)+1;
+ if (srclen == 0)
+ return 0;
lazy_initialize_conv();
descriptor = conv_handles[from][to];
if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) {
- /* conversion not supported, use as is */
- size_t len = MIN(srclen,destlen);
- memcpy(dest,src,len);
- return len;
+ DEBUG(0,("convert_string: Conversion not supported.\n"));
+ goto use_as_is;
}
i_len=srclen;
@@ -187,10 +190,11 @@ size_t convert_string(charset_t from, charset_t to,
switch(errno) {
case EINVAL:
reason="Incomplete multibyte sequence";
- break;
+ DEBUG(3,("convert_string: Conversion error: %s(%s)\n",reason,inbuf));
+ goto use_as_is;
case E2BIG:
reason="No more room";
- DEBUG(0, ("convert_string: Required %lu, available %lu\n",
+ DEBUG(3, ("convert_string: Required %lu, available %lu\n",
(unsigned long)srclen, (unsigned long)destlen));
/* we are not sure we need srclen bytes,
may be more, may be less.
@@ -198,56 +202,86 @@ size_t convert_string(charset_t from, charset_t to,
bytes ---simo */
break;
case EILSEQ:
- reason="Illegal multibyte sequence";
- break;
+ reason="Illegal multibyte sequence";
+ DEBUG(3,("convert_string: Conversion error: %s(%s)\n",reason,inbuf));
+ goto use_as_is;
+ default:
+ DEBUG(0,("convert_string: Conversion error: %s(%s)\n",reason,inbuf));
+ break;
}
/* smb_panic(reason); */
}
return destlen-o_len;
+
+ use_as_is:
+
+ /* conversion not supported, use as is */
+ {
+ size_t len = MIN(srclen,destlen);
+ if (len)
+ memcpy(dest,src,len);
+ return len;
+ }
}
/**
* Convert between character sets, allocating a new buffer for the result.
*
+ * @param ctx TALLOC_CTX to use to allocate with. If NULL use malloc.
* @param srclen length of source buffer.
* @param dest always set at least to NULL
* @note -1 is not accepted for srclen.
*
* @returns Size in bytes of the converted string; or -1 in case of error.
+ *
+ * Ensure the srclen contains the terminating zero.
**/
-size_t convert_string_allocate(charset_t from, charset_t to,
+size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to,
void const *src, size_t srclen, void **dest)
{
- size_t i_len, o_len, destlen;
+ size_t i_len, o_len, destlen = MAX(srclen, 512);
size_t retval;
const char *inbuf = (const char *)src;
- char *outbuf, *ob;
+ char *outbuf = NULL, *ob = NULL;
smb_iconv_t descriptor;
*dest = NULL;
if (src == NULL || srclen == (size_t)-1)
return (size_t)-1;
+ if (srclen == 0)
+ return 0;
lazy_initialize_conv();
descriptor = conv_handles[from][to];
if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) {
- /* conversion not supported, return -1*/
- DEBUG(3, ("convert_string_allocate: conversion not supported!\n"));
- return -1;
+ DEBUG(0,("convert_string_allocate: Conversion not supported.\n"));
+ goto use_as_is;
}
- destlen = MAX(srclen, 512);
- outbuf = NULL;
convert:
- destlen = destlen * 2;
- ob = (char *)Realloc(outbuf, destlen);
+ if ((destlen*2) < destlen) {
+ /* wrapped ! abort. */
+ DEBUG(0, ("convert_string_allocate: destlen wrapped !\n"));
+ if (!ctx)
+ SAFE_FREE(outbuf);
+ return (size_t)-1;
+ } else {
+ destlen = destlen * 2;
+ }
+
+ if (ctx)
+ ob = (char *)talloc_realloc(ctx, ob, destlen);
+ else
+ ob = (char *)Realloc(ob, destlen);
+
if (!ob) {
DEBUG(0, ("convert_string_allocate: realloc failed!\n"));
- SAFE_FREE(outbuf);
+ if (!ctx)
+ SAFE_FREE(outbuf);
return (size_t)-1;
} else {
outbuf = ob;
@@ -262,12 +296,14 @@ convert:
switch(errno) {
case EINVAL:
reason="Incomplete multibyte sequence";
- break;
+ DEBUG(3,("convert_string_allocate: Conversion error: %s(%s)\n",reason,inbuf));
+ goto use_as_is;
case E2BIG:
goto convert;
case EILSEQ:
reason="Illegal multibyte sequence";
- break;
+ DEBUG(3,("convert_string_allocate: Conversion error: %s(%s)\n",reason,inbuf));
+ goto use_as_is;
}
DEBUG(0,("Conversion error: %s(%s)\n",reason,inbuf));
/* smb_panic(reason); */
@@ -275,14 +311,41 @@ convert:
}
destlen = destlen - o_len;
- *dest = (char *)Realloc(ob,destlen);
+ if (ctx)
+ *dest = (char *)talloc_realloc(ctx,ob,destlen);
+ else
+ *dest = (char *)Realloc(ob,destlen);
if (destlen && !*dest) {
DEBUG(0, ("convert_string_allocate: out of memory!\n"));
- SAFE_FREE(ob);
+ if (!ctx)
+ SAFE_FREE(ob);
return (size_t)-1;
}
return destlen;
+
+ use_as_is:
+
+ /* conversion not supported, use as is */
+ {
+ if (srclen && (destlen != srclen)) {
+ destlen = srclen;
+ if (ctx)
+ ob = (char *)talloc_realloc(ctx, ob, destlen);
+ else
+ ob = (char *)Realloc(ob, destlen);
+ if (!ob) {
+ DEBUG(0, ("convert_string_allocate: realloc failed!\n"));
+ if (!ctx)
+ SAFE_FREE(outbuf);
+ return (size_t)-1;
+ }
+ }
+ if (srclen && ob)
+ memcpy(ob,(const char *)src,srclen);
+ *dest = (char *)ob;
+ return srclen;
+ }
}
@@ -298,17 +361,12 @@ convert:
static size_t convert_string_talloc(TALLOC_CTX *ctx, charset_t from, charset_t to,
void const *src, size_t srclen, void **dest)
{
- void *alloced_string;
size_t dest_len;
- /* FIXME: Ridiculous to allocate two buffers and then copy the string! */
-
*dest = NULL;
- dest_len=convert_string_allocate(from, to, src, srclen, &alloced_string);
+ dest_len=convert_string_allocate(ctx, from, to, src, srclen, dest);
if (dest_len == (size_t)-1)
return (size_t)-1;
- *dest = talloc_memdup(ctx, alloced_string, dest_len);
- SAFE_FREE(alloced_string);
if (*dest == NULL)
return (size_t)-1;
return dest_len;
@@ -365,7 +423,7 @@ size_t unix_strlower(const char *src, size_t srclen, char *dest, size_t destlen)
size_t size;
smb_ucs2_t *buffer;
- size = convert_string_allocate(CH_UNIX, CH_UCS2, src, srclen,
+ size = convert_string_allocate(NULL, CH_UNIX, CH_UCS2, src, srclen,
(void **) &buffer);
if (size == -1) {
smb_panic("failed to create UCS2 buffer");
@@ -599,7 +657,7 @@ size_t push_ucs2_allocate(smb_ucs2_t **dest, const char *src)
size_t src_len = strlen(src)+1;
*dest = NULL;
- return convert_string_allocate(CH_UNIX, CH_UCS2, src, src_len, (void **)dest);
+ return convert_string_allocate(NULL, CH_UNIX, CH_UCS2, src, src_len, (void **)dest);
}
/**
@@ -667,7 +725,7 @@ size_t push_utf8_allocate(char **dest, const char *src)
size_t src_len = strlen(src)+1;
*dest = NULL;
- return convert_string_allocate(CH_UNIX, CH_UTF8, src, src_len, (void **)dest);
+ return convert_string_allocate(NULL, CH_UNIX, CH_UTF8, src, src_len, (void **)dest);
}
/**
@@ -755,7 +813,7 @@ size_t pull_ucs2_allocate(char **dest, const smb_ucs2_t *src)
{
size_t src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t);
*dest = NULL;
- return convert_string_allocate(CH_UCS2, CH_UNIX, src, src_len, (void **)dest);
+ return convert_string_allocate(NULL, CH_UCS2, CH_UNIX, src, src_len, (void **)dest);
}
/**
@@ -785,7 +843,7 @@ size_t pull_utf8_allocate(void **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
- return convert_string_allocate(CH_UTF8, CH_UNIX, src, src_len, dest);
+ return convert_string_allocate(NULL, CH_UTF8, CH_UNIX, src, src_len, dest);
}
/**
generated by cgit (git 2.34.1) at 2024-12-22 14:04:59 +0000