diff options
Diffstat (limited to 'vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher')
8 files changed, 1338 insertions, 0 deletions
diff --git a/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go new file mode 100644 index 000000000..126b85ce2 --- /dev/null +++ b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go @@ -0,0 +1,196 @@ +/*- + * Copyright 2014 Square Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package josecipher + +import ( + "bytes" + "crypto/cipher" + "crypto/hmac" + "crypto/sha256" + "crypto/sha512" + "crypto/subtle" + "encoding/binary" + "errors" + "hash" +) + +const ( + nonceBytes = 16 +) + +// NewCBCHMAC instantiates a new AEAD based on CBC+HMAC. +func NewCBCHMAC(key []byte, newBlockCipher func([]byte) (cipher.Block, error)) (cipher.AEAD, error) { + keySize := len(key) / 2 + integrityKey := key[:keySize] + encryptionKey := key[keySize:] + + blockCipher, err := newBlockCipher(encryptionKey) + if err != nil { + return nil, err + } + + var hash func() hash.Hash + switch keySize { + case 16: + hash = sha256.New + case 24: + hash = sha512.New384 + case 32: + hash = sha512.New + } + + return &cbcAEAD{ + hash: hash, + blockCipher: blockCipher, + authtagBytes: keySize, + integrityKey: integrityKey, + }, nil +} + +// An AEAD based on CBC+HMAC +type cbcAEAD struct { + hash func() hash.Hash + authtagBytes int + integrityKey []byte + blockCipher cipher.Block +} + +func (ctx *cbcAEAD) NonceSize() int { + return nonceBytes +} + +func (ctx *cbcAEAD) Overhead() int { + // Maximum overhead is block size (for padding) plus auth tag length, where + // the length of the auth tag is equivalent to the key size. + return ctx.blockCipher.BlockSize() + ctx.authtagBytes +} + +// Seal encrypts and authenticates the plaintext. +func (ctx *cbcAEAD) Seal(dst, nonce, plaintext, data []byte) []byte { + // Output buffer -- must take care not to mangle plaintext input. + ciphertext := make([]byte, uint64(len(plaintext))+uint64(ctx.Overhead()))[:len(plaintext)] + copy(ciphertext, plaintext) + ciphertext = padBuffer(ciphertext, ctx.blockCipher.BlockSize()) + + cbc := cipher.NewCBCEncrypter(ctx.blockCipher, nonce) + + cbc.CryptBlocks(ciphertext, ciphertext) + authtag := ctx.computeAuthTag(data, nonce, ciphertext) + + ret, out := resize(dst, uint64(len(dst))+uint64(len(ciphertext))+uint64(len(authtag))) + copy(out, ciphertext) + copy(out[len(ciphertext):], authtag) + + return ret +} + +// Open decrypts and authenticates the ciphertext. +func (ctx *cbcAEAD) Open(dst, nonce, ciphertext, data []byte) ([]byte, error) { + if len(ciphertext) < ctx.authtagBytes { + return nil, errors.New("square/go-jose: invalid ciphertext (too short)") + } + + offset := len(ciphertext) - ctx.authtagBytes + expectedTag := ctx.computeAuthTag(data, nonce, ciphertext[:offset]) + match := subtle.ConstantTimeCompare(expectedTag, ciphertext[offset:]) + if match != 1 { + return nil, errors.New("square/go-jose: invalid ciphertext (auth tag mismatch)") + } + + cbc := cipher.NewCBCDecrypter(ctx.blockCipher, nonce) + + // Make copy of ciphertext buffer, don't want to modify in place + buffer := append([]byte{}, []byte(ciphertext[:offset])...) + + if len(buffer)%ctx.blockCipher.BlockSize() > 0 { + return nil, errors.New("square/go-jose: invalid ciphertext (invalid length)") + } + + cbc.CryptBlocks(buffer, buffer) + + // Remove padding + plaintext, err := unpadBuffer(buffer, ctx.blockCipher.BlockSize()) + if err != nil { + return nil, err + } + + ret, out := resize(dst, uint64(len(dst))+uint64(len(plaintext))) + copy(out, plaintext) + + return ret, nil +} + +// Compute an authentication tag +func (ctx *cbcAEAD) computeAuthTag(aad, nonce, ciphertext []byte) []byte { + buffer := make([]byte, uint64(len(aad))+uint64(len(nonce))+uint64(len(ciphertext))+8) + n := 0 + n += copy(buffer, aad) + n += copy(buffer[n:], nonce) + n += copy(buffer[n:], ciphertext) + binary.BigEndian.PutUint64(buffer[n:], uint64(len(aad))*8) + + // According to documentation, Write() on hash.Hash never fails. + hmac := hmac.New(ctx.hash, ctx.integrityKey) + _, _ = hmac.Write(buffer) + + return hmac.Sum(nil)[:ctx.authtagBytes] +} + +// resize ensures the the given slice has a capacity of at least n bytes. +// If the capacity of the slice is less than n, a new slice is allocated +// and the existing data will be copied. +func resize(in []byte, n uint64) (head, tail []byte) { + if uint64(cap(in)) >= n { + head = in[:n] + } else { + head = make([]byte, n) + copy(head, in) + } + + tail = head[len(in):] + return +} + +// Apply padding +func padBuffer(buffer []byte, blockSize int) []byte { + missing := blockSize - (len(buffer) % blockSize) + ret, out := resize(buffer, uint64(len(buffer))+uint64(missing)) + padding := bytes.Repeat([]byte{byte(missing)}, missing) + copy(out, padding) + return ret +} + +// Remove padding +func unpadBuffer(buffer []byte, blockSize int) ([]byte, error) { + if len(buffer)%blockSize != 0 { + return nil, errors.New("square/go-jose: invalid padding") + } + + last := buffer[len(buffer)-1] + count := int(last) + + if count == 0 || count > blockSize || count > len(buffer) { + return nil, errors.New("square/go-jose: invalid padding") + } + + padding := bytes.Repeat([]byte{last}, count) + if !bytes.HasSuffix(buffer, padding) { + return nil, errors.New("square/go-jose: invalid padding") + } + + return buffer[:len(buffer)-count], nil +} diff --git a/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac_test.go b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac_test.go new file mode 100644 index 000000000..40bcb20fa --- /dev/null +++ b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac_test.go @@ -0,0 +1,498 @@ +/*- + * Copyright 2014 Square Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package josecipher + +import ( + "bytes" + "crypto/aes" + "crypto/cipher" + "crypto/rand" + "io" + "strings" + "testing" +) + +func TestInvalidInputs(t *testing.T) { + key := []byte{ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + } + + nonce := []byte{ + 92, 80, 104, 49, 133, 25, 161, 215, 173, 101, 219, 211, 136, 91, 210, 145} + + aead, _ := NewCBCHMAC(key, aes.NewCipher) + ciphertext := aead.Seal(nil, nonce, []byte("plaintext"), []byte("aad")) + + // Changed AAD, must fail + _, err := aead.Open(nil, nonce, ciphertext, []byte("INVALID")) + if err == nil { + t.Error("must detect invalid aad") + } + + // Empty ciphertext, must fail + _, err = aead.Open(nil, nonce, []byte{}, []byte("aad")) + if err == nil { + t.Error("must detect invalid/empty ciphertext") + } + + // Corrupt ciphertext, must fail + corrupt := make([]byte, len(ciphertext)) + copy(corrupt, ciphertext) + corrupt[0] ^= 0xFF + + _, err = aead.Open(nil, nonce, corrupt, []byte("aad")) + if err == nil { + t.Error("must detect corrupt ciphertext") + } + + // Corrupt authtag, must fail + copy(corrupt, ciphertext) + corrupt[len(ciphertext)-1] ^= 0xFF + + _, err = aead.Open(nil, nonce, corrupt, []byte("aad")) + if err == nil { + t.Error("must detect corrupt authtag") + } + + // Truncated data, must fail + _, err = aead.Open(nil, nonce, ciphertext[:10], []byte("aad")) + if err == nil { + t.Error("must detect corrupt authtag") + } +} + +func TestVectorsAESCBC128(t *testing.T) { + // Source: http://tools.ietf.org/html/draft-ietf-jose-json-web-encryption-29#appendix-A.2 + plaintext := []byte{ + 76, 105, 118, 101, 32, 108, 111, 110, 103, 32, 97, 110, 100, 32, + 112, 114, 111, 115, 112, 101, 114, 46} + + aad := []byte{ + 101, 121, 74, 104, 98, 71, 99, 105, 79, 105, 74, 83, 85, 48, 69, + 120, 88, 122, 85, 105, 76, 67, 74, 108, 98, 109, 77, 105, 79, 105, + 74, 66, 77, 84, 73, 52, 81, 48, 74, 68, 76, 85, 104, 84, 77, 106, 85, + 50, 73, 110, 48} + + expectedCiphertext := []byte{ + 40, 57, 83, 181, 119, 33, 133, 148, 198, 185, 243, 24, 152, 230, 6, + 75, 129, 223, 127, 19, 210, 82, 183, 230, 168, 33, 215, 104, 143, + 112, 56, 102} + + expectedAuthtag := []byte{ + 246, 17, 244, 190, 4, 95, 98, 3, 231, 0, 115, 157, 242, 203, 100, + 191} + + key := []byte{ + 4, 211, 31, 197, 84, 157, 252, 254, 11, 100, 157, 250, 63, 170, 106, 206, + 107, 124, 212, 45, 111, 107, 9, 219, 200, 177, 0, 240, 143, 156, 44, 207} + + nonce := []byte{ + 3, 22, 60, 12, 43, 67, 104, 105, 108, 108, 105, 99, 111, 116, 104, 101} + + enc, err := NewCBCHMAC(key, aes.NewCipher) + out := enc.Seal(nil, nonce, plaintext, aad) + if err != nil { + t.Error("Unable to encrypt:", err) + return + } + + if bytes.Compare(out[:len(out)-16], expectedCiphertext) != 0 { + t.Error("Ciphertext did not match") + } + if bytes.Compare(out[len(out)-16:], expectedAuthtag) != 0 { + t.Error("Auth tag did not match") + } +} + +func TestVectorsAESCBC256(t *testing.T) { + // Source: https://tools.ietf.org/html/draft-mcgrew-aead-aes-cbc-hmac-sha2-05#section-5.4 + plaintext := []byte{ + 0x41, 0x20, 0x63, 0x69, 0x70, 0x68, 0x65, 0x72, 0x20, 0x73, 0x79, 0x73, 0x74, 0x65, 0x6d, 0x20, + 0x6d, 0x75, 0x73, 0x74, 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x65, 0x71, 0x75, + 0x69, 0x72, 0x65, 0x64, 0x20, 0x74, 0x6f, 0x20, 0x62, 0x65, 0x20, 0x73, 0x65, 0x63, 0x72, 0x65, + 0x74, 0x2c, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x69, 0x74, 0x20, 0x6d, 0x75, 0x73, 0x74, 0x20, 0x62, + 0x65, 0x20, 0x61, 0x62, 0x6c, 0x65, 0x20, 0x74, 0x6f, 0x20, 0x66, 0x61, 0x6c, 0x6c, 0x20, 0x69, + 0x6e, 0x74, 0x6f, 0x20, 0x74, 0x68, 0x65, 0x20, 0x68, 0x61, 0x6e, 0x64, 0x73, 0x20, 0x6f, 0x66, + 0x20, 0x74, 0x68, 0x65, 0x20, 0x65, 0x6e, 0x65, 0x6d, 0x79, 0x20, 0x77, 0x69, 0x74, 0x68, 0x6f, + 0x75, 0x74, 0x20, 0x69, 0x6e, 0x63, 0x6f, 0x6e, 0x76, 0x65, 0x6e, 0x69, 0x65, 0x6e, 0x63, 0x65} + + aad := []byte{ + 0x54, 0x68, 0x65, 0x20, 0x73, 0x65, 0x63, 0x6f, 0x6e, 0x64, 0x20, 0x70, 0x72, 0x69, 0x6e, 0x63, + 0x69, 0x70, 0x6c, 0x65, 0x20, 0x6f, 0x66, 0x20, 0x41, 0x75, 0x67, 0x75, 0x73, 0x74, 0x65, 0x20, + 0x4b, 0x65, 0x72, 0x63, 0x6b, 0x68, 0x6f, 0x66, 0x66, 0x73} + + expectedCiphertext := []byte{ + 0x4a, 0xff, 0xaa, 0xad, 0xb7, 0x8c, 0x31, 0xc5, 0xda, 0x4b, 0x1b, 0x59, 0x0d, 0x10, 0xff, 0xbd, + 0x3d, 0xd8, 0xd5, 0xd3, 0x02, 0x42, 0x35, 0x26, 0x91, 0x2d, 0xa0, 0x37, 0xec, 0xbc, 0xc7, 0xbd, + 0x82, 0x2c, 0x30, 0x1d, 0xd6, 0x7c, 0x37, 0x3b, 0xcc, 0xb5, 0x84, 0xad, 0x3e, 0x92, 0x79, 0xc2, + 0xe6, 0xd1, 0x2a, 0x13, 0x74, 0xb7, 0x7f, 0x07, 0x75, 0x53, 0xdf, 0x82, 0x94, 0x10, 0x44, 0x6b, + 0x36, 0xeb, 0xd9, 0x70, 0x66, 0x29, 0x6a, 0xe6, 0x42, 0x7e, 0xa7, 0x5c, 0x2e, 0x08, 0x46, 0xa1, + 0x1a, 0x09, 0xcc, 0xf5, 0x37, 0x0d, 0xc8, 0x0b, 0xfe, 0xcb, 0xad, 0x28, 0xc7, 0x3f, 0x09, 0xb3, + 0xa3, 0xb7, 0x5e, 0x66, 0x2a, 0x25, 0x94, 0x41, 0x0a, 0xe4, 0x96, 0xb2, 0xe2, 0xe6, 0x60, 0x9e, + 0x31, 0xe6, 0xe0, 0x2c, 0xc8, 0x37, 0xf0, 0x53, 0xd2, 0x1f, 0x37, 0xff, 0x4f, 0x51, 0x95, 0x0b, + 0xbe, 0x26, 0x38, 0xd0, 0x9d, 0xd7, 0xa4, 0x93, 0x09, 0x30, 0x80, 0x6d, 0x07, 0x03, 0xb1, 0xf6} + + expectedAuthtag := []byte{ + 0x4d, 0xd3, 0xb4, 0xc0, 0x88, 0xa7, 0xf4, 0x5c, 0x21, 0x68, 0x39, 0x64, 0x5b, 0x20, 0x12, 0xbf, + 0x2e, 0x62, 0x69, 0xa8, 0xc5, 0x6a, 0x81, 0x6d, 0xbc, 0x1b, 0x26, 0x77, 0x61, 0x95, 0x5b, 0xc5} + + key := []byte{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f} + + nonce := []byte{ + 0x1a, 0xf3, 0x8c, 0x2d, 0xc2, 0xb9, 0x6f, 0xfd, 0xd8, 0x66, 0x94, 0x09, 0x23, 0x41, 0xbc, 0x04} + + enc, err := NewCBCHMAC(key, aes.NewCipher) + out := enc.Seal(nil, nonce, plaintext, aad) + if err != nil { + t.Error("Unable to encrypt:", err) + return + } + + if bytes.Compare(out[:len(out)-32], expectedCiphertext) != 0 { + t.Error("Ciphertext did not match, got", out[:len(out)-32], "wanted", expectedCiphertext) + } + if bytes.Compare(out[len(out)-32:], expectedAuthtag) != 0 { + t.Error("Auth tag did not match, got", out[len(out)-32:], "wanted", expectedAuthtag) + } +} + +func TestAESCBCRoundtrip(t *testing.T) { + key128 := []byte{ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} + + key192 := []byte{ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 0, 1, 2, 3, 4, 5, 6, 7, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 0, 1, 2, 3, 4, 5, 6, 7} + + key256 := []byte{ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} + + nonce := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} + + RunRoundtrip(t, key128, nonce) + RunRoundtrip(t, key192, nonce) + RunRoundtrip(t, key256, nonce) +} + +func RunRoundtrip(t *testing.T, key, nonce []byte) { + aead, err := NewCBCHMAC(key, aes.NewCipher) + if err != nil { + panic(err) + } + + if aead.NonceSize() != len(nonce) { + panic("invalid nonce") + } + + // Test pre-existing data in dst buffer + dst := []byte{15, 15, 15, 15} + plaintext := []byte{0, 0, 0, 0} + aad := []byte{4, 3, 2, 1} + + result := aead.Seal(dst, nonce, plaintext, aad) + if bytes.Compare(dst, result[:4]) != 0 { + t.Error("Existing data in dst not preserved") + } + + // Test pre-existing (empty) dst buffer with sufficient capacity + dst = make([]byte, 256)[:0] + result, err = aead.Open(dst, nonce, result[4:], aad) + if err != nil { + panic(err) + } + + if bytes.Compare(result, plaintext) != 0 { + t.Error("Plaintext does not match output") + } +} + +func TestAESCBCOverhead(t *testing.T) { + aead, err := NewCBCHMAC(make([]byte, 32), aes.NewCipher) + if err != nil { + panic(err) + } + + if aead.Overhead() != 32 { + t.Error("CBC-HMAC reports incorrect overhead value") + } +} + +func TestPadding(t *testing.T) { + for i := 0; i < 256; i++ { + slice := make([]byte, i) + padded := padBuffer(slice, 16) + if len(padded)%16 != 0 { + t.Error("failed to pad slice properly", i) + return + } + unpadded, err := unpadBuffer(padded, 16) + if err != nil || len(unpadded) != i { + t.Error("failed to unpad slice properly", i) + return + } + } +} + +func TestInvalidKey(t *testing.T) { + key := make([]byte, 30) + _, err := NewCBCHMAC(key, aes.NewCipher) + if err == nil { + t.Error("should not be able to instantiate CBC-HMAC with invalid key") + } +} + +func TestTruncatedCiphertext(t *testing.T) { + key := make([]byte, 32) + nonce := make([]byte, 16) + data := make([]byte, 32) + + io.ReadFull(rand.Reader, key) + io.ReadFull(rand.Reader, nonce) + + aead, err := NewCBCHMAC(key, aes.NewCipher) + if err != nil { + panic(err) + } + + ctx := aead.(*cbcAEAD) + ct := aead.Seal(nil, nonce, data, nil) + + // Truncated ciphertext, but with correct auth tag + truncated, tail := resize(ct[:len(ct)-ctx.authtagBytes-2], uint64(len(ct))-2) + copy(tail, ctx.computeAuthTag(nil, nonce, truncated[:len(truncated)-ctx.authtagBytes])) + + // Open should fail + _, err = aead.Open(nil, nonce, truncated, nil) + if err == nil { + t.Error("open on truncated ciphertext should fail") + } +} + +func TestInvalidPaddingOpen(t *testing.T) { + key := make([]byte, 32) + nonce := make([]byte, 16) + + // Plaintext with invalid padding + plaintext := padBuffer(make([]byte, 28), aes.BlockSize) + plaintext[len(plaintext)-1] = 0xFF + + io.ReadFull(rand.Reader, key) + io.ReadFull(rand.Reader, nonce) + + block, _ := aes.NewCipher(key) + cbc := cipher.NewCBCEncrypter(block, nonce) + buffer := append([]byte{}, plaintext...) + cbc.CryptBlocks(buffer, buffer) + + aead, _ := NewCBCHMAC(key, aes.NewCipher) + ctx := aead.(*cbcAEAD) + + // Mutated ciphertext, but with correct auth tag + size := uint64(len(buffer)) + ciphertext, tail := resize(buffer, size+(uint64(len(key))/2)) + copy(tail, ctx.computeAuthTag(nil, nonce, ciphertext[:size])) + + // Open should fail (b/c of invalid padding, even though tag matches) + _, err := aead.Open(nil, nonce, ciphertext, nil) + if err == nil || !strings.Contains(err.Error(), "invalid padding") { + t.Error("no or unexpected error on open with invalid padding:", err) + } +} + +func TestInvalidPadding(t *testing.T) { + for i := 0; i < 256; i++ { + slice := make([]byte, i) + padded := padBuffer(slice, 16) + if len(padded)%16 != 0 { + t.Error("failed to pad slice properly", i) + return + } + + paddingBytes := 16 - (i % 16) + + // Mutate padding for testing + for j := 1; j <= paddingBytes; j++ { + mutated := make([]byte, len(padded)) + copy(mutated, padded) + mutated[len(mutated)-j] ^= 0xFF + + _, err := unpadBuffer(mutated, 16) + if err == nil { + t.Error("unpad on invalid padding should fail", i) + return + } + } + + // Test truncated padding + _, err := unpadBuffer(padded[:len(padded)-1], 16) + if err == nil { + t.Error("unpad on truncated padding should fail", i) + return + } + } +} + +func TestZeroLengthPadding(t *testing.T) { + data := make([]byte, 16) + data, err := unpadBuffer(data, 16) + if err == nil { + t.Error("padding with 0x00 should never be valid") + } +} + +func benchEncryptCBCHMAC(b *testing.B, keySize, chunkSize int) { + key := make([]byte, keySize*2) + nonce := make([]byte, 16) + + io.ReadFull(rand.Reader, key) + io.ReadFull(rand.Reader, nonce) + + chunk := make([]byte, chunkSize) + + aead, err := NewCBCHMAC(key, aes.NewCipher) + if err != nil { + panic(err) + } + + b.SetBytes(int64(chunkSize)) + b.ResetTimer() + for i := 0; i < b.N; i++ { + aead.Seal(nil, nonce, chunk, nil) + } +} + +func benchDecryptCBCHMAC(b *testing.B, keySize, chunkSize int) { + key := make([]byte, keySize*2) + nonce := make([]byte, 16) + + io.ReadFull(rand.Reader, key) + io.ReadFull(rand.Reader, nonce) + + chunk := make([]byte, chunkSize) + + aead, err := NewCBCHMAC(key, aes.NewCipher) + if err != nil { + panic(err) + } + + out := aead.Seal(nil, nonce, chunk, nil) + + b.SetBytes(int64(chunkSize)) + b.ResetTimer() + for i := 0; i < b.N; i++ { + aead.Open(nil, nonce, out, nil) + } +} + +func BenchmarkEncryptAES128_CBCHMAC_1k(b *testing.B) { + benchEncryptCBCHMAC(b, 16, 1024) +} + +func BenchmarkEncryptAES128_CBCHMAC_64k(b *testing.B) { + benchEncryptCBCHMAC(b, 16, 65536) +} + +func BenchmarkEncryptAES128_CBCHMAC_1MB(b *testing.B) { + benchEncryptCBCHMAC(b, 16, 1048576) +} + +func BenchmarkEncryptAES128_CBCHMAC_64MB(b *testing.B) { + benchEncryptCBCHMAC(b, 16, 67108864) +} + +func BenchmarkDecryptAES128_CBCHMAC_1k(b *testing.B) { + benchDecryptCBCHMAC(b, 16, 1024) +} + +func BenchmarkDecryptAES128_CBCHMAC_64k(b *testing.B) { + benchDecryptCBCHMAC(b, 16, 65536) +} + +func BenchmarkDecryptAES128_CBCHMAC_1MB(b *testing.B) { + benchDecryptCBCHMAC(b, 16, 1048576) +} + +func BenchmarkDecryptAES128_CBCHMAC_64MB(b *testing.B) { + benchDecryptCBCHMAC(b, 16, 67108864) +} + +func BenchmarkEncryptAES192_CBCHMAC_64k(b *testing.B) { + benchEncryptCBCHMAC(b, 24, 65536) +} + +func BenchmarkEncryptAES192_CBCHMAC_1MB(b *testing.B) { + benchEncryptCBCHMAC(b, 24, 1048576) +} + +func BenchmarkEncryptAES192_CBCHMAC_64MB(b *testing.B) { + benchEncryptCBCHMAC(b, 24, 67108864) +} + +func BenchmarkDecryptAES192_CBCHMAC_1k(b *testing.B) { + benchDecryptCBCHMAC(b, 24, 1024) +} + +func BenchmarkDecryptAES192_CBCHMAC_64k(b *testing.B) { + benchDecryptCBCHMAC(b, 24, 65536) +} + +func BenchmarkDecryptAES192_CBCHMAC_1MB(b *testing.B) { + benchDecryptCBCHMAC(b, 24, 1048576) +} + +func BenchmarkDecryptAES192_CBCHMAC_64MB(b *testing.B) { + benchDecryptCBCHMAC(b, 24, 67108864) +} + +func BenchmarkEncryptAES256_CBCHMAC_64k(b *testing.B) { + benchEncryptCBCHMAC(b, 32, 65536) +} + +func BenchmarkEncryptAES256_CBCHMAC_1MB(b *testing.B) { + benchEncryptCBCHMAC(b, 32, 1048576) +} + +func BenchmarkEncryptAES256_CBCHMAC_64MB(b *testing.B) { + benchEncryptCBCHMAC(b, 32, 67108864) +} + +func BenchmarkDecryptAES256_CBCHMAC_1k(b *testing.B) { + benchDecryptCBCHMAC(b, 32, 1032) +} + +func BenchmarkDecryptAES256_CBCHMAC_64k(b *testing.B) { + benchDecryptCBCHMAC(b, 32, 65536) +} + +func BenchmarkDecryptAES256_CBCHMAC_1MB(b *testing.B) { + benchDecryptCBCHMAC(b, 32, 1048576) +} + +func BenchmarkDecryptAES256_CBCHMAC_64MB(b *testing.B) { + benchDecryptCBCHMAC(b, 32, 67108864) +} diff --git a/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/concat_kdf.go b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/concat_kdf.go new file mode 100644 index 000000000..f62c3bdba --- /dev/null +++ b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/concat_kdf.go @@ -0,0 +1,75 @@ +/*- + * Copyright 2014 Square Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package josecipher + +import ( + "crypto" + "encoding/binary" + "hash" + "io" +) + +type concatKDF struct { + z, info []byte + i uint32 + cache []byte + hasher hash.Hash +} + +// NewConcatKDF builds a KDF reader based on the given inputs. +func NewConcatKDF(hash crypto.Hash, z, algID, ptyUInfo, ptyVInfo, supPubInfo, supPrivInfo []byte) io.Reader { + buffer := make([]byte, uint64(len(algID))+uint64(len(ptyUInfo))+uint64(len(ptyVInfo))+uint64(len(supPubInfo))+uint64(len(supPrivInfo))) + n := 0 + n += copy(buffer, algID) + n += copy(buffer[n:], ptyUInfo) + n += copy(buffer[n:], ptyVInfo) + n += copy(buffer[n:], supPubInfo) + copy(buffer[n:], supPrivInfo) + + hasher := hash.New() + + return &concatKDF{ + z: z, + info: buffer, + hasher: hasher, + cache: []byte{}, + i: 1, + } +} + +func (ctx *concatKDF) Read(out []byte) (int, error) { + copied := copy(out, ctx.cache) + ctx.cache = ctx.cache[copied:] + + for copied < len(out) { + ctx.hasher.Reset() + + // Write on a hash.Hash never fails + _ = binary.Write(ctx.hasher, binary.BigEndian, ctx.i) + _, _ = ctx.hasher.Write(ctx.z) + _, _ = ctx.hasher.Write(ctx.info) + + hash := ctx.hasher.Sum(nil) + chunkCopied := copy(out[copied:], hash) + copied += chunkCopied + ctx.cache = hash[chunkCopied:] + + ctx.i++ + } + + return copied, nil +} diff --git a/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/concat_kdf_test.go b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/concat_kdf_test.go new file mode 100644 index 000000000..48219b3e1 --- /dev/null +++ b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/concat_kdf_test.go @@ -0,0 +1,150 @@ +/*- + * Copyright 2014 Square Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package josecipher + +import ( + "bytes" + "crypto" + "testing" +) + +// Taken from: https://tools.ietf.org/id/draft-ietf-jose-json-web-algorithms-38.txt +func TestVectorConcatKDF(t *testing.T) { + z := []byte{ + 158, 86, 217, 29, 129, 113, 53, 211, 114, 131, 66, 131, 191, 132, + 38, 156, 251, 49, 110, 163, 218, 128, 106, 72, 246, 218, 167, 121, + 140, 254, 144, 196} + + algID := []byte{0, 0, 0, 7, 65, 49, 50, 56, 71, 67, 77} + + ptyUInfo := []byte{0, 0, 0, 5, 65, 108, 105, 99, 101} + ptyVInfo := []byte{0, 0, 0, 3, 66, 111, 98} + + supPubInfo := []byte{0, 0, 0, 128} + supPrivInfo := []byte{} + + expected := []byte{ + 86, 170, 141, 234, 248, 35, 109, 32, 92, 34, 40, 205, 113, 167, 16, 26} + + ckdf := NewConcatKDF(crypto.SHA256, z, algID, ptyUInfo, ptyVInfo, supPubInfo, supPrivInfo) + + out0 := make([]byte, 9) + out1 := make([]byte, 7) + + read0, err := ckdf.Read(out0) + if err != nil { + t.Error("error when reading from concat kdf reader", err) + return + } + + read1, err := ckdf.Read(out1) + if err != nil { + t.Error("error when reading from concat kdf reader", err) + return + } + + if read0+read1 != len(out0)+len(out1) { + t.Error("did not receive enough bytes from concat kdf reader") + return + } + + out := []byte{} + out = append(out, out0...) + out = append(out, out1...) + + if bytes.Compare(out, expected) != 0 { + t.Error("did not receive expected output from concat kdf reader") + return + } +} + +func TestCache(t *testing.T) { + z := []byte{ + 158, 86, 217, 29, 129, 113, 53, 211, 114, 131, 66, 131, 191, 132, + 38, 156, 251, 49, 110, 163, 218, 128, 106, 72, 246, 218, 167, 121, + 140, 254, 144, 196} + + algID := []byte{1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4} + + ptyUInfo := []byte{1, 2, 3, 4} + ptyVInfo := []byte{4, 3, 2, 1} + + supPubInfo := []byte{} + supPrivInfo := []byte{} + + outputs := [][]byte{} + + // Read the same amount of data in different chunk sizes + chunkSizes := []int{1, 2, 4, 8, 16, 32, 64, 128, 256, 512} + + for _, c := range chunkSizes { + out := make([]byte, 1024) + reader := NewConcatKDF(crypto.SHA256, z, algID, ptyUInfo, ptyVInfo, supPubInfo, supPrivInfo) + + for i := 0; i < 1024; i += c { + _, _ = reader.Read(out[i : i+c]) + } + + outputs = append(outputs, out) + } + + for i := range outputs { + if bytes.Compare(outputs[i], outputs[(i+1)%len(outputs)]) != 0 { + t.Error("not all outputs from KDF matched") + } + } +} + +func benchmarkKDF(b *testing.B, total int) { + z := []byte{ + 158, 86, 217, 29, 129, 113, 53, 211, 114, 131, 66, 131, 191, 132, + 38, 156, 251, 49, 110, 163, 218, 128, 106, 72, 246, 218, 167, 121, + 140, 254, 144, 196} + + algID := []byte{1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4} + + ptyUInfo := []byte{1, 2, 3, 4} + ptyVInfo := []byte{4, 3, 2, 1} + + supPubInfo := []byte{} + supPrivInfo := []byte{} + + out := make([]byte, total) + reader := NewConcatKDF(crypto.SHA256, z, algID, ptyUInfo, ptyVInfo, supPubInfo, supPrivInfo) + + b.ResetTimer() + b.SetBytes(int64(total)) + for i := 0; i < b.N; i++ { + _, _ = reader.Read(out) + } +} + +func BenchmarkConcatKDF_1k(b *testing.B) { + benchmarkKDF(b, 1024) +} + +func BenchmarkConcatKDF_64k(b *testing.B) { + benchmarkKDF(b, 65536) +} + +func BenchmarkConcatKDF_1MB(b *testing.B) { + benchmarkKDF(b, 1048576) +} + +func BenchmarkConcatKDF_64MB(b *testing.B) { + benchmarkKDF(b, 67108864) +} diff --git a/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/ecdh_es.go b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/ecdh_es.go new file mode 100644 index 000000000..f23d49e1f --- /dev/null +++ b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/ecdh_es.go @@ -0,0 +1,62 @@ +/*- + * Copyright 2014 Square Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package josecipher + +import ( + "crypto" + "crypto/ecdsa" + "encoding/binary" +) + +// DeriveECDHES derives a shared encryption key using ECDH/ConcatKDF as described in JWE/JWA. +// It is an error to call this function with a private/public key that are not on the same +// curve. Callers must ensure that the keys are valid before calling this function. Output +// size may be at most 1<<16 bytes (64 KiB). +func DeriveECDHES(alg string, apuData, apvData []byte, priv *ecdsa.PrivateKey, pub *ecdsa.PublicKey, size int) []byte { + if size > 1<<16 { + panic("ECDH-ES output size too large, must be less than 1<<16") + } + + // algId, partyUInfo, partyVInfo inputs must be prefixed with the length + algID := lengthPrefixed([]byte(alg)) + ptyUInfo := lengthPrefixed(apuData) + ptyVInfo := lengthPrefixed(apvData) + + // suppPubInfo is the encoded length of the output size in bits + supPubInfo := make([]byte, 4) + binary.BigEndian.PutUint32(supPubInfo, uint32(size)*8) + + if !priv.PublicKey.Curve.IsOnCurve(pub.X, pub.Y) { + panic("public key not on same curve as private key") + } + + z, _ := priv.PublicKey.Curve.ScalarMult(pub.X, pub.Y, priv.D.Bytes()) + reader := NewConcatKDF(crypto.SHA256, z.Bytes(), algID, ptyUInfo, ptyVInfo, supPubInfo, []byte{}) + + key := make([]byte, size) + + // Read on the KDF will never fail + _, _ = reader.Read(key) + return key +} + +func lengthPrefixed(data []byte) []byte { + out := make([]byte, len(data)+4) + binary.BigEndian.PutUint32(out, uint32(len(data))) + copy(out[4:], data) + return out +} diff --git a/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/ecdh_es_test.go b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/ecdh_es_test.go new file mode 100644 index 000000000..ca2c508dd --- /dev/null +++ b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/ecdh_es_test.go @@ -0,0 +1,115 @@ +/*- + * Copyright 2014 Square Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package josecipher + +import ( + "bytes" + "crypto/ecdsa" + "crypto/elliptic" + "encoding/base64" + "math/big" + "testing" +) + +// Example keys from JWA, Appendix C +var aliceKey = &ecdsa.PrivateKey{ + PublicKey: ecdsa.PublicKey{ + Curve: elliptic.P256(), + X: fromBase64Int("gI0GAILBdu7T53akrFmMyGcsF3n5dO7MmwNBHKW5SV0="), + Y: fromBase64Int("SLW_xSffzlPWrHEVI30DHM_4egVwt3NQqeUD7nMFpps="), + }, + D: fromBase64Int("0_NxaRPUMQoAJt50Gz8YiTr8gRTwyEaCumd-MToTmIo="), +} + +var bobKey = &ecdsa.PrivateKey{ + PublicKey: ecdsa.PublicKey{ + Curve: elliptic.P256(), + X: fromBase64Int("weNJy2HscCSM6AEDTDg04biOvhFhyyWvOHQfeF_PxMQ="), + Y: fromBase64Int("e8lnCO-AlStT-NJVX-crhB7QRYhiix03illJOVAOyck="), + }, + D: fromBase64Int("VEmDZpDXXK8p8N0Cndsxs924q6nS1RXFASRl6BfUqdw="), +} + +// Build big int from base64-encoded string. Strips whitespace (for testing). +func fromBase64Int(data string) *big.Int { + val, err := base64.URLEncoding.DecodeString(data) + if err != nil { + panic("Invalid test data") + } + return new(big.Int).SetBytes(val) +} + +func TestVectorECDHES(t *testing.T) { + apuData := []byte("Alice") + apvData := []byte("Bob") + + expected := []byte{ + 86, 170, 141, 234, 248, 35, 109, 32, 92, 34, 40, 205, 113, 167, 16, 26} + + output := DeriveECDHES("A128GCM", apuData, apvData, bobKey, &aliceKey.PublicKey, 16) + + if bytes.Compare(output, expected) != 0 { + t.Error("output did not match what we expect, got", output, "wanted", expected) + } +} + +func TestInvalidECPublicKey(t *testing.T) { + defer func() { recover() }() + + // Invalid key + invalid := &ecdsa.PrivateKey{ + PublicKey: ecdsa.PublicKey{ + Curve: elliptic.P256(), + X: fromBase64Int("MTEx"), + Y: fromBase64Int("MTEx"), + }, + D: fromBase64Int("0_NxaRPUMQoAJt50Gz8YiTr8gRTwyEaCumd-MToTmIo="), + } + + DeriveECDHES("A128GCM", []byte{}, []byte{}, bobKey, &invalid.PublicKey, 16) + t.Fatal("should panic if public key was invalid") +} + +func BenchmarkECDHES_128(b *testing.B) { + apuData := []byte("APU") + apvData := []byte("APV") + + b.ResetTimer() + for i := 0; i < b.N; i++ { + DeriveECDHES("ID", apuData, apvData, bobKey, &aliceKey.PublicKey, 16) + } +} + +func BenchmarkECDHES_192(b *testing.B) { + apuData := []byte("APU") + apvData := []byte("APV") + + b.ResetTimer() + for i := 0; i < b.N; i++ { + DeriveECDHES("ID", apuData, apvData, bobKey, &aliceKey.PublicKey, 24) + } +} + +func BenchmarkECDHES_256(b *testing.B) { + apuData := []byte("APU") + apvData := []byte("APV") + + b.ResetTimer() + for i := 0; i < b.N; i++ { + DeriveECDHES("ID", apuData, apvData, bobKey, &aliceKey.PublicKey, 32) + } +} diff --git a/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/key_wrap.go b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/key_wrap.go new file mode 100644 index 000000000..1d36d5015 --- /dev/null +++ b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/key_wrap.go @@ -0,0 +1,109 @@ +/*- + * Copyright 2014 Square Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package josecipher + +import ( + "crypto/cipher" + "crypto/subtle" + "encoding/binary" + "errors" +) + +var defaultIV = []byte{0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6} + +// KeyWrap implements NIST key wrapping; it wraps a content encryption key (cek) with the given block cipher. +func KeyWrap(block cipher.Block, cek []byte) ([]byte, error) { + if len(cek)%8 != 0 { + return nil, errors.New("square/go-jose: key wrap input must be 8 byte blocks") + } + + n := len(cek) / 8 + r := make([][]byte, n) + + for i := range r { + r[i] = make([]byte, 8) + copy(r[i], cek[i*8:]) + } + + buffer := make([]byte, 16) + tBytes := make([]byte, 8) + copy(buffer, defaultIV) + + for t := 0; t < 6*n; t++ { + copy(buffer[8:], r[t%n]) + + block.Encrypt(buffer, buffer) + + binary.BigEndian.PutUint64(tBytes, uint64(t+1)) + + for i := 0; i < 8; i++ { + buffer[i] = buffer[i] ^ tBytes[i] + } + copy(r[t%n], buffer[8:]) + } + + out := make([]byte, (n+1)*8) + copy(out, buffer[:8]) + for i := range r { + copy(out[(i+1)*8:], r[i]) + } + + return out, nil +} + +// KeyUnwrap implements NIST key unwrapping; it unwraps a content encryption key (cek) with the given block cipher. +func KeyUnwrap(block cipher.Block, ciphertext []byte) ([]byte, error) { + if len(ciphertext)%8 != 0 { + return nil, errors.New("square/go-jose: key wrap input must be 8 byte blocks") + } + + n := (len(ciphertext) / 8) - 1 + r := make([][]byte, n) + + for i := range r { + r[i] = make([]byte, 8) + copy(r[i], ciphertext[(i+1)*8:]) + } + + buffer := make([]byte, 16) + tBytes := make([]byte, 8) + copy(buffer[:8], ciphertext[:8]) + + for t := 6*n - 1; t >= 0; t-- { + binary.BigEndian.PutUint64(tBytes, uint64(t+1)) + + for i := 0; i < 8; i++ { + buffer[i] = buffer[i] ^ tBytes[i] + } + copy(buffer[8:], r[t%n]) + + block.Decrypt(buffer, buffer) + + copy(r[t%n], buffer[8:]) + } + + if subtle.ConstantTimeCompare(buffer[:8], defaultIV) == 0 { + return nil, errors.New("square/go-jose: failed to unwrap key") + } + + out := make([]byte, n*8) + for i := range r { + copy(out[i*8:], r[i]) + } + + return out, nil +} diff --git a/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/key_wrap_test.go b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/key_wrap_test.go new file mode 100644 index 000000000..ceecf812b --- /dev/null +++ b/vendor/github.com/rsc/letsencrypt/vendor/gopkg.in/square/go-jose.v1/cipher/key_wrap_test.go @@ -0,0 +1,133 @@ +/*- + * Copyright 2014 Square Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package josecipher + +import ( + "bytes" + "crypto/aes" + "encoding/hex" + "testing" +) + +func TestAesKeyWrap(t *testing.T) { + // Test vectors from: http://csrc.nist.gov/groups/ST/toolkit/documents/kms/key-wrap.pdf + kek0, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F") + cek0, _ := hex.DecodeString("00112233445566778899AABBCCDDEEFF") + + expected0, _ := hex.DecodeString("1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5") + + kek1, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F1011121314151617") + cek1, _ := hex.DecodeString("00112233445566778899AABBCCDDEEFF") + + expected1, _ := hex.DecodeString("96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D") + + kek2, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F") + cek2, _ := hex.DecodeString("00112233445566778899AABBCCDDEEFF0001020304050607") + + expected2, _ := hex.DecodeString("A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1") + + block0, _ := aes.NewCipher(kek0) + block1, _ := aes.NewCipher(kek1) + block2, _ := aes.NewCipher(kek2) + + out0, _ := KeyWrap(block0, cek0) + out1, _ := KeyWrap(block1, cek1) + out2, _ := KeyWrap(block2, cek2) + + if bytes.Compare(out0, expected0) != 0 { + t.Error("output 0 not as expected, got", out0, "wanted", expected0) + } + + if bytes.Compare(out1, expected1) != 0 { + t.Error("output 1 not as expected, got", out1, "wanted", expected1) + } + + if bytes.Compare(out2, expected2) != 0 { + t.Error("output 2 not as expected, got", out2, "wanted", expected2) + } + + unwrap0, _ := KeyUnwrap(block0, out0) + unwrap1, _ := KeyUnwrap(block1, out1) + unwrap2, _ := KeyUnwrap(block2, out2) + + if bytes.Compare(unwrap0, cek0) != 0 { + t.Error("key unwrap did not return original input, got", unwrap0, "wanted", cek0) + } + + if bytes.Compare(unwrap1, cek1) != 0 { + t.Error("key unwrap did not return original input, got", unwrap1, "wanted", cek1) + } + + if bytes.Compare(unwrap2, cek2) != 0 { + t.Error("key unwrap did not return original input, got", unwrap2, "wanted", cek2) + } +} + +func TestAesKeyWrapInvalid(t *testing.T) { + kek, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F") + + // Invalid unwrap input (bit flipped) + input0, _ := hex.DecodeString("1EA68C1A8112B447AEF34BD8FB5A7B828D3E862371D2CFE5") + + block, _ := aes.NewCipher(kek) + + _, err := KeyUnwrap(block, input0) + if err == nil { + t.Error("key unwrap failed to detect invalid input") + } + + // Invalid unwrap input (truncated) + input1, _ := hex.DecodeString("1EA68C1A8112B447AEF34BD8FB5A7B828D3E862371D2CF") + + _, err = KeyUnwrap(block, input1) + if err == nil { + t.Error("key unwrap failed to detect truncated input") + } + + // Invalid wrap input (not multiple of 8) + input2, _ := hex.DecodeString("0123456789ABCD") + + _, err = KeyWrap(block, input2) + if err == nil { + t.Error("key wrap accepted invalid input") + } + +} + +func BenchmarkAesKeyWrap(b *testing.B) { + kek, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F") + key, _ := hex.DecodeString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF") + + block, _ := aes.NewCipher(kek) + + b.ResetTimer() + for i := 0; i < b.N; i++ { + KeyWrap(block, key) + } +} + +func BenchmarkAesKeyUnwrap(b *testing.B) { + kek, _ := hex.DecodeString("000102030405060708090A0B0C0D0E0F") + input, _ := hex.DecodeString("1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5") + + block, _ := aes.NewCipher(kek) + + b.ResetTimer() + for i := 0; i < b.N; i++ { + KeyUnwrap(block, input) + } +} |