[gnutls-devel] GnuTLS | OpenSSL IPv6 PSK Incompatibility (#683)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Thu Jan 24 16:51:31 CET 2019

> RFC 6066 says: Literal IPv4 and IPv6 addresses are not permitted in "HostName".

The checking code is
if (!(c_isalnum(str[i]) || str[i] == '-' || str[i] == '.'))
    return 0;

So IPv4 addresses are accepted. Just IPv6 not because they contain colons which are forbidden in DNS names.

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