From 38ee83e45b4de7edf89bf9f0ef629eb4c6ad0fa8 Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Thu, 12 May 2016 23:56:07 -0400 Subject: Moving to glide --- vendor/golang.org/x/crypto/pbkdf2/pbkdf2.go | 77 +++++++++++ vendor/golang.org/x/crypto/pbkdf2/pbkdf2_test.go | 157 +++++++++++++++++++++++ 2 files changed, 234 insertions(+) create mode 100644 vendor/golang.org/x/crypto/pbkdf2/pbkdf2.go create mode 100644 vendor/golang.org/x/crypto/pbkdf2/pbkdf2_test.go (limited to 'vendor/golang.org/x/crypto/pbkdf2') diff --git a/vendor/golang.org/x/crypto/pbkdf2/pbkdf2.go b/vendor/golang.org/x/crypto/pbkdf2/pbkdf2.go new file mode 100644 index 000000000..593f65300 --- /dev/null +++ b/vendor/golang.org/x/crypto/pbkdf2/pbkdf2.go @@ -0,0 +1,77 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* +Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC +2898 / PKCS #5 v2.0. + +A key derivation function is useful when encrypting data based on a password +or any other not-fully-random data. It uses a pseudorandom function to derive +a secure encryption key based on the password. + +While v2.0 of the standard defines only one pseudorandom function to use, +HMAC-SHA1, the drafted v2.1 specification allows use of all five FIPS Approved +Hash Functions SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512 for HMAC. To +choose, you can pass the `New` functions from the different SHA packages to +pbkdf2.Key. +*/ +package pbkdf2 // import "golang.org/x/crypto/pbkdf2" + +import ( + "crypto/hmac" + "hash" +) + +// Key derives a key from the password, salt and iteration count, returning a +// []byte of length keylen that can be used as cryptographic key. The key is +// derived based on the method described as PBKDF2 with the HMAC variant using +// the supplied hash function. +// +// For example, to use a HMAC-SHA-1 based PBKDF2 key derivation function, you +// can get a derived key for e.g. AES-256 (which needs a 32-byte key) by +// doing: +// +// dk := pbkdf2.Key([]byte("some password"), salt, 4096, 32, sha1.New) +// +// Remember to get a good random salt. At least 8 bytes is recommended by the +// RFC. +// +// Using a higher iteration count will increase the cost of an exhaustive +// search but will also make derivation proportionally slower. +func Key(password, salt []byte, iter, keyLen int, h func() hash.Hash) []byte { + prf := hmac.New(h, password) + hashLen := prf.Size() + numBlocks := (keyLen + hashLen - 1) / hashLen + + var buf [4]byte + dk := make([]byte, 0, numBlocks*hashLen) + U := make([]byte, hashLen) + for block := 1; block <= numBlocks; block++ { + // N.B.: || means concatenation, ^ means XOR + // for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter + // U_1 = PRF(password, salt || uint(i)) + prf.Reset() + prf.Write(salt) + buf[0] = byte(block >> 24) + buf[1] = byte(block >> 16) + buf[2] = byte(block >> 8) + buf[3] = byte(block) + prf.Write(buf[:4]) + dk = prf.Sum(dk) + T := dk[len(dk)-hashLen:] + copy(U, T) + + // U_n = PRF(password, U_(n-1)) + for n := 2; n <= iter; n++ { + prf.Reset() + prf.Write(U) + U = U[:0] + U = prf.Sum(U) + for x := range U { + T[x] ^= U[x] + } + } + } + return dk[:keyLen] +} diff --git a/vendor/golang.org/x/crypto/pbkdf2/pbkdf2_test.go b/vendor/golang.org/x/crypto/pbkdf2/pbkdf2_test.go new file mode 100644 index 000000000..137924061 --- /dev/null +++ b/vendor/golang.org/x/crypto/pbkdf2/pbkdf2_test.go @@ -0,0 +1,157 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pbkdf2 + +import ( + "bytes" + "crypto/sha1" + "crypto/sha256" + "hash" + "testing" +) + +type testVector struct { + password string + salt string + iter int + output []byte +} + +// Test vectors from RFC 6070, http://tools.ietf.org/html/rfc6070 +var sha1TestVectors = []testVector{ + { + "password", + "salt", + 1, + []byte{ + 0x0c, 0x60, 0xc8, 0x0f, 0x96, 0x1f, 0x0e, 0x71, + 0xf3, 0xa9, 0xb5, 0x24, 0xaf, 0x60, 0x12, 0x06, + 0x2f, 0xe0, 0x37, 0xa6, + }, + }, + { + "password", + "salt", + 2, + []byte{ + 0xea, 0x6c, 0x01, 0x4d, 0xc7, 0x2d, 0x6f, 0x8c, + 0xcd, 0x1e, 0xd9, 0x2a, 0xce, 0x1d, 0x41, 0xf0, + 0xd8, 0xde, 0x89, 0x57, + }, + }, + { + "password", + "salt", + 4096, + []byte{ + 0x4b, 0x00, 0x79, 0x01, 0xb7, 0x65, 0x48, 0x9a, + 0xbe, 0xad, 0x49, 0xd9, 0x26, 0xf7, 0x21, 0xd0, + 0x65, 0xa4, 0x29, 0xc1, + }, + }, + // // This one takes too long + // { + // "password", + // "salt", + // 16777216, + // []byte{ + // 0xee, 0xfe, 0x3d, 0x61, 0xcd, 0x4d, 0xa4, 0xe4, + // 0xe9, 0x94, 0x5b, 0x3d, 0x6b, 0xa2, 0x15, 0x8c, + // 0x26, 0x34, 0xe9, 0x84, + // }, + // }, + { + "passwordPASSWORDpassword", + "saltSALTsaltSALTsaltSALTsaltSALTsalt", + 4096, + []byte{ + 0x3d, 0x2e, 0xec, 0x4f, 0xe4, 0x1c, 0x84, 0x9b, + 0x80, 0xc8, 0xd8, 0x36, 0x62, 0xc0, 0xe4, 0x4a, + 0x8b, 0x29, 0x1a, 0x96, 0x4c, 0xf2, 0xf0, 0x70, + 0x38, + }, + }, + { + "pass\000word", + "sa\000lt", + 4096, + []byte{ + 0x56, 0xfa, 0x6a, 0xa7, 0x55, 0x48, 0x09, 0x9d, + 0xcc, 0x37, 0xd7, 0xf0, 0x34, 0x25, 0xe0, 0xc3, + }, + }, +} + +// Test vectors from +// http://stackoverflow.com/questions/5130513/pbkdf2-hmac-sha2-test-vectors +var sha256TestVectors = []testVector{ + { + "password", + "salt", + 1, + []byte{ + 0x12, 0x0f, 0xb6, 0xcf, 0xfc, 0xf8, 0xb3, 0x2c, + 0x43, 0xe7, 0x22, 0x52, 0x56, 0xc4, 0xf8, 0x37, + 0xa8, 0x65, 0x48, 0xc9, + }, + }, + { + "password", + "salt", + 2, + []byte{ + 0xae, 0x4d, 0x0c, 0x95, 0xaf, 0x6b, 0x46, 0xd3, + 0x2d, 0x0a, 0xdf, 0xf9, 0x28, 0xf0, 0x6d, 0xd0, + 0x2a, 0x30, 0x3f, 0x8e, + }, + }, + { + "password", + "salt", + 4096, + []byte{ + 0xc5, 0xe4, 0x78, 0xd5, 0x92, 0x88, 0xc8, 0x41, + 0xaa, 0x53, 0x0d, 0xb6, 0x84, 0x5c, 0x4c, 0x8d, + 0x96, 0x28, 0x93, 0xa0, + }, + }, + { + "passwordPASSWORDpassword", + "saltSALTsaltSALTsaltSALTsaltSALTsalt", + 4096, + []byte{ + 0x34, 0x8c, 0x89, 0xdb, 0xcb, 0xd3, 0x2b, 0x2f, + 0x32, 0xd8, 0x14, 0xb8, 0x11, 0x6e, 0x84, 0xcf, + 0x2b, 0x17, 0x34, 0x7e, 0xbc, 0x18, 0x00, 0x18, + 0x1c, + }, + }, + { + "pass\000word", + "sa\000lt", + 4096, + []byte{ + 0x89, 0xb6, 0x9d, 0x05, 0x16, 0xf8, 0x29, 0x89, + 0x3c, 0x69, 0x62, 0x26, 0x65, 0x0a, 0x86, 0x87, + }, + }, +} + +func testHash(t *testing.T, h func() hash.Hash, hashName string, vectors []testVector) { + for i, v := range vectors { + o := Key([]byte(v.password), []byte(v.salt), v.iter, len(v.output), h) + if !bytes.Equal(o, v.output) { + t.Errorf("%s %d: expected %x, got %x", hashName, i, v.output, o) + } + } +} + +func TestWithHMACSHA1(t *testing.T) { + testHash(t, sha1.New, "SHA1", sha1TestVectors) +} + +func TestWithHMACSHA256(t *testing.T) { + testHash(t, sha256.New, "SHA256", sha256TestVectors) +} -- cgit v1.2.3-1-g7c22