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* lib/securerandom.rb (SecureRandom.urlsafe_base64): new method. 

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22326 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2009-02-15 07:58:31 +00:00
parent d40578e438
commit 357f66670c
2 changed files with 57 additions and 0 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
Sun Feb 15 16:57:35 2009 Tanaka Akira <akr@fsij.org>
* lib/securerandom.rb (SecureRandom.urlsafe_base64): new method.
Sun Feb 15 14:58:07 2009 Tanaka Akira <akr@fsij.org>
* hash.c (hash_i): use Murmurhash.

53
lib/securerandom.rb
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@ -46,6 +46,11 @@ module SecureRandom
# If n is not specified, 16 is assumed.
# It may be larger in future.
#
# The result may contain any byte: "\x00" - "\xff".
#
# p SecureRandom.random_bytes #=> "\xD8\\\xE0\xF4\r\xB2\xFC*WM\xFF\x83\x18\xF45\xB6"
# p SecureRandom.random_bytes #=> "m\xDC\xFC/\a\x00Uf\xB2\xB2P\xBD\xFF6S\x97"
#
# If secure random number generator is not available,
# NotImplementedError is raised.
def self.random_bytes(n=nil)
@ -117,6 +122,11 @@ module SecureRandom
# If n is not specified, 16 is assumed.
# It may be larger in future.
#
# The result may contain 0-9 and a-f.
#
# p SecureRandom.hex #=> "eb693ec8252cd630102fd0d0fb7c3485"
# p SecureRandom.hex #=> "91dc3bfb4de5b11d029d376634589b61"
#
# If secure random number generator is not available,
# NotImplementedError is raised.
def self.hex(n=nil)
@ -131,21 +141,59 @@ module SecureRandom
# If n is not specified, 16 is assumed.
# It may be larger in future.
#
# The result may contain A-Z, a-z, 0-9, "+", "/" and "=".
#
# p SecureRandom.base64 #=> "/2BuBuLf3+WfSKyQbRcc/A=="
# p SecureRandom.base64 #=> "6BbW0pxO0YENxn38HMUbcQ=="
#
# If secure random number generator is not available,
# NotImplementedError is raised.
#
# See RFC 3548 for base64.
def self.base64(n=nil)
[random_bytes(n)].pack("m*").delete("\n")
end
# SecureRandom.urlsafe_base64 generates a random URL-safe base64 string.
#
# The argument n specifies the length of the random length.
# The length of the result string is about 4/3 of n.
#
# If n is not specified, 16 is assumed.
# It may be larger in future.
#
# The result may contain A-Z, a-z, 0-9, "-", "_" and "=".
#
# p SecureRandom.urlsafe_base64 #=> "b4GOKm4pOYU_-BOXcrUGDg=="
# p SecureRandom.urlsafe_base64 #=> "UZLdOkzop70Ddx-IJR0ABg=="
#
# If secure random number generator is not available,
# NotImplementedError is raised.
#
# See RFC 3548 for URL-safe base64.
def self.urlsafe_base64(n=nil)
s = [random_bytes(n)].pack("m*")
s.delete!("\n")
s.tr!("+/", "-_")
s
end
# SecureRandom.random_number generates a random number.
#
# If an positive integer is given as n,
# SecureRandom.random_number returns an integer:
# 0 <= SecureRandom.random_number(n) < n.
#
# p SecureRandom.random_number(100) #=> 15
# p SecureRandom.random_number(100) #=> 88
#
# If 0 is given or an argument is not given,
# SecureRandom.random_number returns an float:
# 0.0 <= SecureRandom.random_number() < 1.0.
#
# p SecureRandom.random_number #=> 0.596506046187744
# p SecureRandom.random_number #=> 0.350621695741409
#
def self.random_number(n=0)
if 0 < n
hex = n.to_s(16)
@ -168,6 +216,11 @@ module SecureRandom
end
# SecureRandom.uuid generates a v4 random UUID.
#
# p SecureRandom.uuid #=> "2d931510-d99f-494a-8c67-87feb05e1594"
# p SecureRandom.uuid #=> "62936e70-1815-439b-bf89-8492855a7e6b"
#
# See RFC 4122 for UUID.
def self.uuid
ary = self.random_bytes(16).unpack("NnnnnN")
ary[2] = (ary[2] & 0x0fff) | 0x4000