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Diffstat (limited to 'libidn/idna.c')
-rw-r--r--libidn/idna.c69
1 files changed, 52 insertions, 17 deletions
diff --git a/libidn/idna.c b/libidn/idna.c
index bf692c0..81e92f7 100644
--- a/libidn/idna.c
+++ b/libidn/idna.c
@@ -116,9 +116,13 @@ idna_to_ascii_4i (const uint32_t * in, size_t inlen, char *out, int flags)
do
{
len = 2 * len + 10; /* XXX better guess? */
- p = realloc (p, len);
+ char *newp = realloc (p, len);
if (p == NULL)
- return IDNA_MALLOC_ERROR;
+ {
+ free (p);
+ return IDNA_MALLOC_ERROR;
+ }
+ p = newp;
if (flags & IDNA_ALLOW_UNASSIGNED)
rc = stringprep_nameprep (p, len);
@@ -288,9 +292,13 @@ idna_to_unicode_internal (char *utf8in,
*/
do
{
- utf8in = realloc (utf8in, utf8len + addlen);
- if (!utf8in)
- return IDNA_MALLOC_ERROR;
+ char *newp = realloc (utf8in, utf8len + addlen);
+ if (newp == NULL)
+ {
+ free (utf8in);
+ return IDNA_MALLOC_ERROR;
+ }
+ utf8in = newp;
if (flags & IDNA_ALLOW_UNASSIGNED)
rc = stringprep_nameprep (utf8in, utf8len + addlen);
else
@@ -300,7 +308,10 @@ idna_to_unicode_internal (char *utf8in,
while (rc == STRINGPREP_TOO_SMALL_BUFFER);
if (rc != STRINGPREP_OK)
- return IDNA_STRINGPREP_ERROR;
+ {
+ free (utf8in);
+ return IDNA_STRINGPREP_ERROR;
+ }
/* 3. Verify that the sequence begins with the ACE prefix, and save a
* copy of the sequence.
@@ -308,7 +319,10 @@ idna_to_unicode_internal (char *utf8in,
step3:
if (memcmp (IDNA_ACE_PREFIX, utf8in, strlen (IDNA_ACE_PREFIX)) != 0)
- return IDNA_NO_ACE_PREFIX;
+ {
+ free (utf8in);
+ return IDNA_NO_ACE_PREFIX;
+ }
/* 4. Remove the ACE prefix.
*/
@@ -325,7 +339,10 @@ step3:
rc = punycode_decode (strlen (utf8in), utf8in, outlen, out, NULL);
if (rc != PUNYCODE_SUCCESS)
- return IDNA_PUNYCODE_ERROR;
+ {
+ free (utf8in);
+ return IDNA_PUNYCODE_ERROR;
+ }
out[*outlen] = 0; /* add zero */
@@ -334,18 +351,25 @@ step3:
rc = idna_to_ascii_4i (out, *outlen, tmpout, flags);
if (rc != IDNA_SUCCESS)
- return rc;
+ {
+ free (utf8in);
+ return rc;
+ }
/* 7. Verify that the result of step 6 matches the saved copy from
* step 3, using a case-insensitive ASCII comparison.
*/
if (strcasecmp (utf8in, tmpout + strlen (IDNA_ACE_PREFIX)) != 0)
- return IDNA_ROUNDTRIP_VERIFY_ERROR;
+ {
+ free (utf8in);
+ return IDNA_ROUNDTRIP_VERIFY_ERROR;
+ }
/* 8. Return the saved copy from step 5.
*/
+ free (utf8in);
return IDNA_SUCCESS;
}
@@ -404,7 +428,7 @@ idna_to_unicode_44i (const uint32_t * in, size_t inlen,
*outlen = inlen;
}
- free (p);
+ /* p is freed in idna_to_unicode_internal. */
return rc;
}
@@ -479,9 +503,13 @@ idna_to_ascii_4z (const uint32_t * input, char **output, int flags)
if (out)
{
- out = realloc (out, strlen (out) + 1 + strlen (buf) + 1);
- if (!out)
- return IDNA_MALLOC_ERROR;
+ char *newp = realloc (out, strlen (out) + 1 + strlen (buf) + 1);
+ if (!newp)
+ {
+ free (out);
+ return IDNA_MALLOC_ERROR;
+ }
+ out = newp;
strcat (out, ".");
strcat (out, buf);
}
@@ -605,9 +633,16 @@ idna_to_unicode_4z4z (const uint32_t * input, uint32_t ** output, int flags)
if (out)
{
- out = realloc (out, sizeof (out[0]) * (outlen + 1 + buflen + 1));
- if (!out)
- return IDNA_MALLOC_ERROR;
+ uint32_t *newp = realloc (out,
+ sizeof (out[0])
+ * (outlen + 1 + buflen + 1));
+ if (!newp)
+ {
+ free (buf);
+ free (out);
+ return IDNA_MALLOC_ERROR;
+ }
+ out = newp;
out[outlen++] = 0x002E; /* '.' (full stop) */
memcpy (out + outlen, buf, sizeof (buf[0]) * buflen);
outlen += buflen;