diff options
Diffstat (limited to 'vendor/gopkg.in/square/go-jose.v2/cipher')
| -rw-r--r-- | vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go | 196 | ||||
| -rw-r--r-- | vendor/gopkg.in/square/go-jose.v2/cipher/concat_kdf.go | 75 | ||||
| -rw-r--r-- | vendor/gopkg.in/square/go-jose.v2/cipher/ecdh_es.go | 62 | ||||
| -rw-r--r-- | vendor/gopkg.in/square/go-jose.v2/cipher/key_wrap.go | 109 |
4 files changed, 0 insertions, 442 deletions
diff --git a/vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go b/vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go deleted file mode 100644 index 126b85ce2..000000000 --- a/vendor/gopkg.in/square/go-jose.v2/cipher/cbc_hmac.go +++ /dev/null @@ -1,196 +0,0 @@ -/*- - * 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/gopkg.in/square/go-jose.v2/cipher/concat_kdf.go b/vendor/gopkg.in/square/go-jose.v2/cipher/concat_kdf.go deleted file mode 100644 index f62c3bdba..000000000 --- a/vendor/gopkg.in/square/go-jose.v2/cipher/concat_kdf.go +++ /dev/null @@ -1,75 +0,0 @@ -/*- - * 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/gopkg.in/square/go-jose.v2/cipher/ecdh_es.go b/vendor/gopkg.in/square/go-jose.v2/cipher/ecdh_es.go deleted file mode 100644 index c128e327f..000000000 --- a/vendor/gopkg.in/square/go-jose.v2/cipher/ecdh_es.go +++ /dev/null @@ -1,62 +0,0 @@ -/*- - * 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 or equal to 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/gopkg.in/square/go-jose.v2/cipher/key_wrap.go b/vendor/gopkg.in/square/go-jose.v2/cipher/key_wrap.go deleted file mode 100644 index 1d36d5015..000000000 --- a/vendor/gopkg.in/square/go-jose.v2/cipher/key_wrap.go +++ /dev/null @@ -1,109 +0,0 @@ -/*- - * 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 -} |