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authentik/passbook/providers/saml/utils/encoding.py

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"""Wrappers to de/encode and de/inflate strings"""
import base64
import zlib
PEM_HEADER = "-----BEGIN CERTIFICATE-----"
PEM_FOOTER = "-----END CERTIFICATE-----"
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def decode_base64_and_inflate(encoded: str, encoding="utf-8") -> str:
"""Base64 decode and ZLib decompress b64string"""
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decoded_data = base64.b64decode(encoded)
try:
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return zlib.decompress(decoded_data, -15).decode(encoding)
except zlib.error:
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return decoded_data.decode(encoding)
def deflate_and_base64_encode(inflated: str, encoding="utf-8"):
"""Base64 and ZLib Compress b64string"""
zlibbed_str = zlib.compress(inflated.encode())
compressed_string = zlibbed_str[2:-4]
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return base64.b64encode(compressed_string).decode(encoding)
def nice64(src: str) -> str:
"""Returns src base64-encoded and formatted nicely for our XML. """
return base64.b64encode(src.encode()).decode("utf-8").replace("\n", "")
def strip_pem_header(cert: str) -> str:
"""Remove PEM Headers"""
return cert.replace(PEM_HEADER, "").replace(PEM_FOOTER, "").replace("\n", "")