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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/topics/auth.txt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/topics/auth.txt b/docs/topics/auth.txt index efc6e78413..677429db47 100644 --- a/docs/topics/auth.txt +++ b/docs/topics/auth.txt @@ -462,6 +462,17 @@ To use Bcrypt as your default storage algorithm, do the following: That's it -- now your Django install will use Bcrypt as the default storage algorithm. +.. admonition:: Password truncation with BCryptPasswordHasher + + The designers of bcrypt truncate all passwords at 72 characters which means + that ``bcrypt(password_with_100_chars) == bcrypt(password_with_100_chars[:72])``. + ``BCryptPasswordHasher`` does not have any special handling and + thus is also subject to this hidden password length limit. The practical + ramification of this truncation is pretty marginal as the average user does + not have a password greater than 72 characters in length and even being + truncated at 72 the compute powered required to brute force bcrypt in any + useful amount of time is still astronomical. + .. admonition:: Other bcrypt implementations There are several other implementations that allow bcrypt to be |