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Return True if this password wasn't generated by
User.set_unusable_password(), i.e. make_password(None).
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Return a boolean of whether the raw password matches the three
part encoded digest.
If setter is specified, it'll be called when you need to
regenerate the password.
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Turn a plain-text password into a hash for database storage
Same as encode() but generate a new random salt. If password is None then
return a concatenation of UNUSABLE_PASSWORD_PREFIX and a random string,
which disallows logins. Additional random string reduces chances of gaining
access to staff or superuser accounts. See ticket #20079 for more info.
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isinstance�bytes�str� TypeError�type� __qualname__r �salt�encode)r r, r" r r r r G s �� r c C sB g } t jD ]}t|�}|� }t|d�std| ��| �|� q| S )Nr z,hasher doesn't specify an algorithm name: %s)r �PASSWORD_HASHERSr
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Return an instance of a loaded password hasher.
If algorithm is 'default', return the default hasher. Lazily import hashers
specified in the project's settings file if needed.
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Return an instance of a loaded password hasher.
Identify hasher algorithm by examining encoded hash, and call
get_hasher() to return hasher. Raise ValueError if
algorithm cannot be identified, or if hasher is not loaded.
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Return the given hash, with only the first ``show`` number shown. The
rest are masked with ``char`` for security reasons.
N)rH )�hash�show�char�maskedr r r � mask_hash� s rP c C s t | �t�t t�� |k S �N)rH �math�log2r )r, �expected_entropyr r r �must_update_salt� s rU c @ s\ e Zd ZdZdZdZdZdd� Zdd� Zdd � Z d
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Abstract base class for password hashers
When creating your own hasher, you need to override algorithm,
verify(), encode() and safe_summary().
PasswordHasher objects are immutable.
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td| jj |f ��d }~ww td| jj ��)Nz&Couldn't load %r algorithm library: %sz-Hasher %r doesn't specify a library attribute)
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����z BasePasswordHasher._load_libraryc C s& t �| jt �tt�� �}t|td�S )z�
Generate a cryptographically secure nonce salt in ASCII with an entropy
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char_countr r r r, � s zBasePasswordHasher.saltc C � t d��)z'Check if the given password is correct.z?subclasses of BasePasswordHasher must provide a verify() method��NotImplementedError�r` r r r r r r � s zBasePasswordHasher.verifyc C rj )z�
Create an encoded database value.
The result is normally formatted as "algorithm$salt$hash" and
must be fewer than 128 characters.
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Return a decoded database value.
The result is a dictionary and should contain `algorithm`, `hash`, and
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Return a summary of safe values.
The result is a dictionary and will be used where the password field
must be displayed to construct a safe representation of the password.
zEsubclasses of BasePasswordHasher must provide a safe_summary() methodrk rp r r r � safe_summary� ro z BasePasswordHasher.safe_summaryc C � dS )NFr rp r r r r � � z BasePasswordHasher.must_updatec C s t �d� dS )a�
Bridge the runtime gap between the work factor supplied in `encoded`
and the work factor suggested by this hasher.
Taking PBKDF2 as an example, if `encoded` contains 20000 iterations and
`self.iterations` is 30000, this method should run password through
another 10000 iterations of PBKDF2. Similar approaches should exist
for any hasher that has a work factor. If not, this method should be
defined as a no-op to silence the warning.
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Secure password hashing using the PBKDF2 algorithm (recommended)
Configured to use PBKDF2 + HMAC + SHA256.
The result is a 64 byte binary string. Iterations may be changed
safely but you must rename the algorithm if you change SHA256.
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Alternate PBKDF2 hasher which uses SHA1, the default PRF
recommended by PKCS #5. This is compatible with other
implementations of PBKDF2, such as openssl's
PKCS5_PBKDF2_HMAC_SHA1().
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r� c @ s\ e Zd ZdZdZdZdZdZdZdd� Z dd � Z
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Secure password hashing using the argon2 algorithm.
This is the winner of the Password Hashing Competition 2013-2015
(https://password-hashing.net). It requires the argon2-cffi library which
depends on native C code and might cause portability issues.
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r� c @ sZ e Zd ZdZdZejZdZdZ dd� Z
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Secure password hashing using the bcrypt algorithm (recommended)
This is considered by many to be the most secure algorithm but you
must first install the bcrypt library. Please be warned that
this library depends on native C code and might cause portability
issues.
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bcrypt_sha256)�bcryptr� � c C s | � � }|�| j�S rQ )re �gensalt�rounds)r` r� r r r r, � s z BCryptSHA256PasswordHasher.saltc C sN | � � }|�� }| jd urt�| �|��� �}|�||�}d| j|�d�f S )Nz%s$%sr| )re r- r{ �binascii�hexlify�hashpwr rq )r` r r, r� r� r r r r- � s
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C sF | � |�}td�|d td�|d td�t|d �td�t|d �iS )Nr z work factorr� r, r� r� r� r r r rr � r� z'BCryptSHA256PasswordHasher.safe_summaryc C s | � |�}|d | jkS )Nr� )rq r� r� r r r r � s
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Secure password hashing using the bcrypt algorithm
This is considered by many to be the most secure algorithm but you
must first install the bcrypt library. Please be warned that
this library depends on native C code and might cause portability
issues.
This hasher does not first hash the password which means it is subject to
bcrypt's 72 bytes password truncation. Most use cases should prefer the
BCryptSHA256PasswordHasher.
r� N)r_ rw r+ rx r r{ r r r r r� � s r� c @ �D e Zd ZdZdZdd� Zdd� Zdd� Zd d
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dS )�SHA1PasswordHasherz?
The SHA1 password hashing algorithm (not recommended)
r� c C �B |d usJ �|r d|vsJ �t �|| �� ��� }d| j||f S �Nr@ �%s$%s$%s)r� r� r- � hexdigestr �r` r r, rL r r r r- � zSHA1PasswordHasher.encodec C �, |� dd�\}}}|| jksJ �|||d�S �Nr@ r� �r rL r, �rI r �r` r r r, rL r r r rq � �zSHA1PasswordHasher.decodec C �$ | � |�}| �||d �}t||�S �Nr, r� r� r r r r �
zSHA1PasswordHasher.verifyc C �> | � |�}td�|d td�t|d dd�td�t|d �iS �Nr r, r� �rM rL r� r� r r r rr # �
�z SHA1PasswordHasher.safe_summaryc C � | � |�}t|d | j�S r� �rq rU rh r� r r r r + �
z SHA1PasswordHasher.must_updatec C r� rQ r rm r r r r / rt z!SHA1PasswordHasher.harden_runtimeN� r_ rw r+ rx r r- rq r rr r r r r r r r� � r� c @ r� )�MD5PasswordHasherzE
The Salted MD5 password hashing algorithm (not recommended)
�md5c C r� r� )r� r� r- r� r r� r r r r- 9 r� zMD5PasswordHasher.encodec C r� r� r� r� r r r rq ? r� zMD5PasswordHasher.decodec C r� r� r� r� r r r r H r� zMD5PasswordHasher.verifyc C r� r� r� r� r r r rr M r� z MD5PasswordHasher.safe_summaryc C r� r� r� r� r r r r U r� z MD5PasswordHasher.must_updatec C r� rQ r rm r r r r Y rt z MD5PasswordHasher.harden_runtimeNr� r r r r r� 3 r� r� c @ r� )�UnsaltedSHA1PasswordHashera7
Very insecure algorithm that you should *never* use; store SHA1 hashes
with an empty salt.
This class is implemented because Django used to accept such password
hashes. Some older Django installs still have these values lingering
around so we need to handle and upgrade them properly.
rF c C rs �N� r �r` r r r r, h rt z UnsaltedSHA1PasswordHasher.saltc C s& |dksJ �t �|�� ��� }d| S )Nr� zsha1$$%s)r� r� r- r� r� r r r r- k s z!UnsaltedSHA1PasswordHasher.encodec C s$ |� d�sJ �| j|dd � d d�S )NrE rJ r� )r r rp r r r rq p s
�z!UnsaltedSHA1PasswordHasher.decodec C s | � |d�}t||�S r� )r- r �r` r r r� r r r r x s
z!UnsaltedSHA1PasswordHasher.verifyc C s* | � |�}td�|d td�t|d �iS )Nr rL r� r� r r r rr | s
�z'UnsaltedSHA1PasswordHasher.safe_summaryc C r� rQ r rm r r r r � rt z)UnsaltedSHA1PasswordHasher.harden_runtimeN� r_ rw r+ rx r r, r- rq r rr r r r r r r� ] s r� c @ r� )�UnsaltedMD5PasswordHashera�
Incredibly insecure algorithm that you should *never* use; stores unsalted
MD5 hashes without the algorithm prefix, also accepts MD5 hashes with an
empty salt.
This class is implemented because Django used to store passwords this way
and to accept such password hashes. Some older Django installs still have
these values lingering around so we need to handle and upgrade them
properly.
rC c C rs r� r r� r r r r, � rt z UnsaltedMD5PasswordHasher.saltc C s |dksJ �t �|�� ��� S r� )r� r� r- r� rn r r r r- � s z UnsaltedMD5PasswordHasher.encodec C s | j |d d�S )Nr� r5 rp r r r rq � s �z UnsaltedMD5PasswordHasher.decodec C s8 t |�dkr|�d�r|dd � }| �|d�}t||�S )NrA rB � r� )rH r r- r r� r r r r � s
z UnsaltedMD5PasswordHasher.verifyc C s. | � |�}td�|d td�t|d dd�iS )Nr rL r� r� r� r� r r r rr � s
�z&UnsaltedMD5PasswordHasher.safe_summaryc C r� rQ r rm r r r r � rt z(UnsaltedMD5PasswordHasher.harden_runtimeNr� r r r r r� � s
r� c @ sH e Zd ZdZdZdZdd� Zdd� Zdd� Zd d
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d� Z dS )�CryptPasswordHasherzv
Password hashing using UNIX crypt (not recommended)
The crypt module is not supported on all platforms.
�cryptc C s t d�S )Nr� )r r� r r r r, � s zCryptPasswordHasher.saltc C s@ | � � }t|�dks J �|�||�}|d usJ �d| jd|f S )Nr� r� r� )re rH r� r )r` r r, r� rL r r r r- � s
zCryptPasswordHasher.encodec C r� r� r� r� r r r rq � r� zCryptPasswordHasher.decodec C s0 | � � }| �|�}|�||d �}t|d |�S )NrL )re rq r� r )r` r r r� r� r� r r r r � s
zCryptPasswordHasher.verifyc C s: | � |�}td�|d td�|d td�t|d dd�iS )Nr r, rL r� r� r� r� r r r rr � s
�z CryptPasswordHasher.safe_summaryc C r� rQ r rm r r r r � rt z"CryptPasswordHasher.harden_runtimeN) r_ rw r+ rx r rX r, r- rq r rr r r r r r r� � s r� )Nr )r )rJ rK )1r~ r� � functoolsr� r[ rR ru � django.confr �django.core.exceptionsr �django.core.signalsr �django.dispatchr �django.utils.cryptor r r r �django.utils.module_loadingr
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