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-rw-r--r--src/saml2/validate.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/saml2/validate.py b/src/saml2/validate.py
index 8b0533f9..c6caf47d 100644
--- a/src/saml2/validate.py
+++ b/src/saml2/validate.py
@@ -133,6 +133,7 @@ def valid_ipv4(address):
IPV6_PATTERN = re.compile(r"""
^
\s* # Leading whitespace
+ \[? # See https://tools.ietf.org/html/rfc4038#section-5.1
(?!.*::.*::) # Only a single wildcard allowed
(?:(?!:)|:(?=:)) # Colon iff it would be part of a wildcard
(?: # Repeat 6 times:
@@ -153,6 +154,7 @@ IPV6_PATTERN = re.compile(r"""
(?:25[0-4]|2[0-4]\d|1\d\d|[1-9]?\d)
){3}
)
+ \]? # See https://tools.ietf.org/html/rfc4038#section-5.1
\s* # Trailing whitespace
$
""", re.VERBOSE | re.IGNORECASE | re.DOTALL)