[PATCH 4/4] crypt.3: Added description of previously undocumented 'rounds' parameter
DORMANTno replies
From: Konstantin Shemyak <hidden>
Date: 2017-09-03 16:16:36
Subsystem:
the rest · Maintainer:
Linus Torvalds
Possibly related (same subject, not in this thread)
- 2017-09-03 · Re: [PATCH 4/4] crypt.3: Added description of previously undocumented 'rounds' parameter · Michael Kerrisk (man-pages) <hidden>
Signed-off-by: Konstantin Shemyak <redacted> --- man3/crypt.3 | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/man3/crypt.3 b/man3/crypt.3
index 375ef93..b9cf973 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. +This actual number 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),
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2.7.4
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