In crypt/sha512-crypt.c::__sha512_crypt_r() and the similar sha256 function,
the length of the actually used salt is calculated as:
salt_len = MIN (strcspn (salt, "$"), SALT_LEN_MAX);
Thus the trailing '$' is optional in the salt string. One can check that
crypt("key", "$5$salt")
yields the same result as
crypt("key", "$5$salt$").
Signed-off-by: Konstantin Shemyak <konstantin@xxxxxxxxxxx>
---
man3/crypt.3 | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/man3/crypt.3 b/man3/crypt.3
index 749a636..58fd33f 100644
--- a/man3/crypt.3
+++ b/man3/crypt.3
@@ -195,15 +195,15 @@ encryption algorithms.
If
.I salt
is a character string starting with the characters "$\fIid\fP$"
-followed by a string terminated by "$":
+followed by a string optionally terminated by "$",
+then the result has the form:
.RS
.PP
$\fIid\fP$\fIsalt\fP$\fIencrypted\fP
.PP
.RE
-then instead of using the DES machine,
.I id
-identifies the encryption method used and this then determines how the rest
+identifies the encryption method used instead of DES and this then determines how the rest
of the password string is interpreted.
The following values of
.I id
--
2.7.4
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