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From 3c3e5b52bb70f03cd68a720efb51366bca09beeb Mon Sep 17 00:00:00 2001
From: Dakota Williams <drwilliams@datto.com>
Date: Thu, 28 Feb 2019 15:54:49 -0500
Subject: [PATCH] Add version check for internal idn2 symbols
libidn2 >2.1.0 removed _idn2_punycode_[en|de]code symbols from its
library and renamed _idn2_to_unicode_8z8z to idn2_to_unicode_8z8z
with a different function declaration.
The preprocessor check in str-idna.c only checks for the existence
of libidn2, not the version, for how it should use the library.
This change backports the fix in later versions of GnuTLS
to fix the problem.
Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1683812
Co-authored-by: Neal Gompa <ngompa@datto.com>
Co-authored-by: Dakota Williams <drwilliams@datto.com>
Reviewed-by: Neal Gompa <ngompa@datto.com>
Signed-off-by: Dakota Williams <drwilliams@datto.com>
Signed-off-by: Neal Gompa <ngompa@datto.com>
---
lib/str-idna.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/lib/str-idna.c b/lib/str-idna.c
index 3bf2db877..1e8c00c08 100644
--- a/lib/str-idna.c
+++ b/lib/str-idna.c
@@ -145,7 +145,7 @@ int gnutls_idna_map(const char *input, unsigned ilen, gnutls_datum_t *out, unsig
return ret;
}
-#ifdef HAVE_LIBIDN2
+#if defined(HAVE_LIBIDN2) && (IDN2_VERSION_NUMBER < 0x02000000)
int _idn2_punycode_decode(
size_t input_length,
const char input[],
@@ -252,6 +252,7 @@ int gnutls_idna_reverse_map(const char *input, unsigned ilen, gnutls_datum_t *ou
}
#ifdef HAVE_LIBIDN2
+#if (IDN2_VERSION_NUMBER < 0x02000000)
/* currently libidn2 just converts single labels, thus a wrapper function */
rc = _idn2_to_unicode_8z8z((char*)istr.data, &u8);
if (rc != IDN2_OK) {
@@ -260,6 +261,15 @@ int gnutls_idna_reverse_map(const char *input, unsigned ilen, gnutls_datum_t *ou
ret = GNUTLS_E_INVALID_UTF8_STRING;
goto fail;
}
+#else
+ rc = idn2_to_unicode_8z8z((char*)istr.data, &u8, 0);
+ if (rc != IDN2_OK) {
+ gnutls_assert();
+ _gnutls_debug_log("unable to convert ACE name '%s' to UTF-8 format: %s\n", istr.data, idn2_strerror(rc));
+ ret = GNUTLS_E_INVALID_UTF8_STRING;
+ goto fail;
+ }
+#endif
#else
rc = idna_to_unicode_8z8z((char*)istr.data, &u8, IDNA_ALLOW_UNASSIGNED);
if (rc != IDNA_SUCCESS) {
--
2.20.1
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