imacat/flask-digestauth
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Revised the calc_response function for readability.

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This commit is contained in:
依瑪貓 2022-11-29 22:09:42 +08:00
parent 7db38c7eae
commit 8c98d35934
1 changed files with 21 additions and 24 deletions
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45
src/flask_digest_auth/algo.py
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@ -61,6 +61,16 @@ def calc_response(
cnonce or nc is missing with the auth or auth-int qop.
"""
def validate_required(field: t.Optional[str], error: str) -> None:
"""Validates a required field.
:param field: The field that is required.
:param error: The error message.
:return: None.
"""
if field is None:
raise UnauthorizedException(error)
def calc_ha1() -> str:
"""Calculates and returns the first hash.
@ -68,16 +78,13 @@ def calc_response(
:raise UnauthorizedException: When the cnonce is missing with the MD5-sess
algorithm.
"""
if algorithm is None or algorithm == "MD5":
return password_hash
if algorithm == "MD5-sess":
if cnonce is None:
raise UnauthorizedException(
f"Missing \"cnonce\" with algorithm=\"{algorithm}\"")
validate_required(
cnonce, f"Missing \"cnonce\" with algorithm=\"{algorithm}\"")
return md5(f"{password_hash}:{nonce}:{cnonce}".encode("utf8")) \
.hexdigest()
raise UnauthorizedException(
f"Unsupported algorithm=\"{algorithm}\"")
# algorithm is None or algorithm == "MD5"
return password_hash
def calc_ha2() -> str:
"""Calculates the second hash.
@ -86,30 +93,20 @@ def calc_response(
:raise UnauthorizedException: When the body is missing with
qop="auth-int".
"""
if qop is None or qop == "auth":
return md5(f"{method}:{uri}".encode("utf8")).hexdigest()
if qop == "auth-int":
if body is None:
raise UnauthorizedException(
f"Missing \"body\" with qop=\"{qop}\"")
validate_required(body, f"Missing \"body\" with qop=\"{qop}\"")
return md5(
f"{method}:{uri}:{md5(body).hexdigest()}".encode("utf8")) \
.hexdigest()
raise UnauthorizedException(f"Unsupported qop=\"{qop}\"")
# qop is None or qop == "auth"
return md5(f"{method}:{uri}".encode("utf8")).hexdigest()
ha1: str = calc_ha1()
ha2: str = calc_ha2()
if qop is None:
return md5(f"{ha1}:{nonce}:{ha2}".encode("utf8")).hexdigest()
if qop == "auth" or qop == "auth-int":
if cnonce is None:
raise UnauthorizedException(
f"Missing \"cnonce\" with the qop=\"{qop}\"")
if nc is None:
raise UnauthorizedException(
f"Missing \"nc\" with the qop=\"{qop}\"")
validate_required(cnonce, f"Missing \"cnonce\" with the qop=\"{qop}\"")
validate_required(nc, f"Missing \"nc\" with the qop=\"{qop}\"")
return md5(f"{ha1}:{nonce}:{nc}:{cnonce}:{qop}:{ha2}".encode("utf8"))\
.hexdigest()
if cnonce is None:
raise UnauthorizedException(
f"Unsupported qop=\"{qop}\"")
# qop is None
return md5(f"{ha1}:{nonce}:{ha2}".encode("utf8")).hexdigest()