Generate a random secret key by using the Win32 API. Raises LoadError if
the current platform cannot make use of the Win32 API. Raises
SystemCallError if some other error occured.
# File railties/lib/rails_generator/secret_key_generator.rb, line 27
def generate_secret_with_win32_api
# Following code is based on David Garamond's GUID library for Ruby.
require 'Win32API'
crypt_acquire_context = Win32API.new("advapi32", "CryptAcquireContext",
'PPPII', 'L')
crypt_gen_random = Win32API.new("advapi32", "CryptGenRandom",
'LIP', 'L')
crypt_release_context = Win32API.new("advapi32", "CryptReleaseContext",
'LI', 'L')
prov_rsa_full = 1
crypt_verifycontext = 0xF0000000
hProvStr = " " * 4
if crypt_acquire_context.call(hProvStr, nil, nil, prov_rsa_full,
crypt_verifycontext) == 0
raise SystemCallError, "CryptAcquireContext failed: #{lastWin32ErrorMessage}"
end
hProv, = hProvStr.unpack('L')
bytes = " " * 64
if crypt_gen_random.call(hProv, bytes.size, bytes) == 0
raise SystemCallError, "CryptGenRandom failed: #{lastWin32ErrorMessage}"
end
if crypt_release_context.call(hProv, 0) == 0
raise SystemCallError, "CryptReleaseContext failed: #{lastWin32ErrorMessage}"
end
bytes.unpack("H*")[0]
end
