1/*-
2 * Copyright 2014 Square Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package jose
18
19import (
20	"crypto/rand"
21	"encoding/base64"
22	"encoding/hex"
23	"math/big"
24	"regexp"
25)
26
27// Reset random reader to original value
28func resetRandReader() {
29	RandReader = rand.Reader
30}
31
32// Build big int from hex-encoded string. Strips whitespace (for testing).
33func fromHexInt(base16 string) *big.Int {
34	re := regexp.MustCompile(`\s+`)
35	val, ok := new(big.Int).SetString(re.ReplaceAllString(base16, ""), 16)
36	if !ok {
37		panic("Invalid test data")
38	}
39	return val
40}
41
42// Build big int from base64-encoded string. Strips whitespace (for testing).
43func fromBase64Int(encoded string) *big.Int {
44	re := regexp.MustCompile(`\s+`)
45	val, err := base64.RawURLEncoding.DecodeString(re.ReplaceAllString(encoded, ""))
46	if err != nil {
47		panic("Invalid test data: " + err.Error())
48	}
49	return new(big.Int).SetBytes(val)
50}
51
52// Decode hex-encoded string into byte array. Strips whitespace (for testing).
53func fromHexBytes(base16 string) []byte {
54	re := regexp.MustCompile(`\s+`)
55	val, err := hex.DecodeString(re.ReplaceAllString(base16, ""))
56	if err != nil {
57		panic("Invalid test data")
58	}
59	return val
60}
61
62// Decode base64-encoded string into byte array. Strips whitespace (for testing).
63func fromBase64Bytes(b64 string) []byte {
64	re := regexp.MustCompile(`\s+`)
65	val, err := base64.StdEncoding.DecodeString(re.ReplaceAllString(b64, ""))
66	if err != nil {
67		panic("Invalid test data")
68	}
69	return val
70}
71
72// Decode base64-urlencoded string into byte array. Strips whitespace (for testing).
73func fromBase64URLBytes(b64 string) []byte {
74	re := regexp.MustCompile(`\s+`)
75	val, err := base64.RawURLEncoding.DecodeString(re.ReplaceAllString(b64, ""))
76	if err != nil {
77		panic("Invalid test data")
78	}
79	return val
80}
81