Ns sha1 - Revision history

Dossy: Tcllib example of SHA1

2005-12-04T04:21:56Z

Tcllib example of SHA1

Caveman at 15:16, 3 December 2005

2005-12-03T15:16:12Z

Caveman: additional information on salt usage -- perhaps here not the best place for it

2005-12-03T15:15:37Z

additional information on salt usage -- perhaps here not the best place for it

Caveman: added additional links to alternative sha1 implementations (non-aolserver)

2005-12-03T14:31:01Z

added additional links to alternative sha1 implementations (non-aolserver)

Caveman at 23:12, 2 December 2005

2005-12-02T23:12:47Z

Caveman: added link to answers.com description of SHA

2005-12-02T22:40:09Z

added link to answers.com description of SHA

Caveman: added postgresql section

2005-12-02T22:36:20Z

added postgresql section

Caveman at 22:27, 2 December 2005

2005-12-02T22:27:11Z

Caveman at 22:26, 2 December 2005

2005-12-02T22:26:30Z

Caveman: created

2005-12-02T22:26:19Z

created

New page

'''Description'''
Returns a 40-character, hex-encoded string containing the SHA1 hash of the first argument.

'''Usage'''

Example 1:

<pre>
set sRawPassword "mypassword"
set sPassword [ns_sha1 $sRawPassword]
ns_adp_puts $sPassword
# 04003622EB9D0F788CE7568C7EED23809534365A
</pre>

Usually this function is used with a salt, as without a salt it is succeptible to dictionary-based attacks.

Example 2:

<pre>
set sSalt "salty"
set sRawPassword "mypassword"
set sPassword [ns_sha1 ${sRawPassword}${sSalt}]
# B48FB74597C11FC609DBE912992085EB07847FB6
</pre>

This function is provided by the [[nssha1]] module.

@@ Line 45: / Line 45: @@
 dfd9ddb4198affc5c194cd8ce6d338fde470e2
 (1 row)
 </pre>

← Older revision		Revision as of 15:16, 3 December 2005
Line 32:		Line 32:

	This function is provided by the [[nssha1]] module, provided as a [http://packages.debian.org/stable/web/aolserver4-nssha1 Debian package] among others.		This function is provided by the [[nssha1]] module, provided as a [http://packages.debian.org/stable/web/aolserver4-nssha1 Debian package] among others.
		+
		+	'''Caveat'''

	Unfortunately, this implementation does not seem to be immediately compatible with [http://www.xml-dev.com/blog/sha1.php other] SHA1 [http://www.movable-type.co.uk/scripts/SHA-1.html implementations].		Unfortunately, this implementation does not seem to be immediately compatible with [http://www.xml-dev.com/blog/sha1.php other] SHA1 [http://www.movable-type.co.uk/scripts/SHA-1.html implementations].

@@ Line 18: / Line 18: @@
 </pre>
-Usually this function is used with a salt, as without a salt it is succeptible to dictionary-based attacks.
+Usually this function is used with either a prefixed or postfixed salt, as without a salt it is succeptible to dictionary-based attacks.
 Example 2:
@@ Line 29: / Line 29: @@
 </pre>
-This function is provided by the [[nssha1]] module.
+Good salts are at least of moderate length and consist of random characters. Take note, however, that you would need to be able to retrieve the same salt to perform a match against the previous hash given the same unsalted input. Hash functions for human-chosen alphanumeric passwords are usually succeptible to dictionary-based attacks.
 Unfortunately, this implementation does not seem to be immediately compatible with [http://www.xml-dev.com/blog/sha1.php other] SHA1 [http://www.movable-type.co.uk/scripts/SHA-1.html implementations].

@@ Line 31: / Line 31: @@
 This function is provided by the [[nssha1]] module.
-Unfortunately, this implementation does not seem to be immediately compatible with other SHA1 implementations.
+Unfortunately, this implementation does not seem to be immediately compatible with [http://www.xml-dev.com/blog/sha1.php other] SHA1 [http://www.movable-type.co.uk/scripts/SHA-1.html implementations].
 Postgresql:

← Older revision		Revision as of 23:12, 2 December 2005
Line 42:		Line 42:
	(1 row)		(1 row)
	</pre>		</pre>
		+
		+	'''SEE ALSO'''
		+
		+	: [[ns_uuencode]], [[ns_uudecode]], [[ns_crypt]], [[ns_rand]]

@@ Line 5: / Line 5: @@
 '''Description'''
-Returns a 40-character, hex-encoded string containing the SHA1 hash of the first argument.
+Returns a 40-character, hex-encoded string containing the [http://www.answers.com/topic/sha-family SHA1] hash of the first argument.
 '''Usage'''

← Older revision		Revision as of 22:36, 2 December 2005
Line 30:		Line 30:

	This function is provided by the [[nssha1]] module.		This function is provided by the [[nssha1]] module.
		+
		+	Unfortunately, this implementation does not seem to be immediately compatible with other SHA1 implementations.
		+
		+	Postgresql:
		+
		+	<pre>
		+	template1=> select encode(digest('mypassword','SHA1'),'hex');
		+	encode
		+	------------------------------------------
		+	91dfd9ddb4198affc5c194cd8ce6d338fde470e2
		+	(1 row)
		+	</pre>

← Older revision		Revision as of 22:27, 2 December 2005
Line 1:		Line 1:
		+	'''Function'''
		+
		+	ns_sha1 ''string''
		+
	'''Description'''		'''Description'''

← Older revision		Revision as of 22:26, 2 December 2005
Line 1:		Line 1:
	'''Description'''		'''Description'''
		+
	Returns a 40-character, hex-encoded string containing the SHA1 hash of the first argument.		Returns a 40-character, hex-encoded string containing the SHA1 hash of the first argument.