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| -rw-r--r-- | man3/crypt.3 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/man3/crypt.3 b/man3/crypt.3 index 375ef9384f..c9aec5b431 100644 --- a/man3/crypt.3 +++ b/man3/crypt.3 @@ -249,6 +249,21 @@ In the MD5 and SHA implementations the entire .I key is significant (instead of only the first 8 bytes in DES). +.PP +SHA-256 and SHA-512 implementations support user-supplied number of +hashing rounds, defaulting to 5000. +If the "$\fIid\fP$" characters in the salt are +followed by "rounds=\fIxxx\fP$" and \fIxxx\fP is an integer, then the +result has the form +.RS +.PP +$\fIid\fP$\fIrounds=yyy\fP$\fIsalt\fP$\fIencrypted\fP +.PP +.RE +where \fIyyy\fP is the actual number of hashing rounds used. +The number actually used is 1000 if the supplied number is less than +1000, 999999999 if the supplied number is greater than 999999999, and +equal to the supplied number otherwise. .SH SEE ALSO .BR login (1), .BR passwd (1), |