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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef NET_CERT_ASN1_UTIL_H_ | 5 #ifndef NET_CERT_ASN1_UTIL_H_ |
6 #define NET_CERT_ASN1_UTIL_H_ | 6 #define NET_CERT_ASN1_UTIL_H_ |
7 | 7 |
8 #include <vector> | 8 #include <vector> |
9 | 9 |
10 #include "base/strings/string_piece.h" | 10 #include "base/strings/string_piece.h" |
11 #include "net/base/net_export.h" | 11 #include "net/base/net_export.h" |
12 | 12 |
13 namespace net { | 13 namespace net { |
14 | 14 |
15 namespace asn1 { | 15 namespace asn1 { |
16 | 16 |
17 // These are the DER encodings of the tag byte for ASN.1 objects. | 17 // These are the DER encodings of the tag byte for ASN.1 objects. |
18 static const unsigned kBOOLEAN = 0x01; | 18 static const unsigned kBOOLEAN = 0x01; |
19 static const unsigned kINTEGER = 0x02; | 19 static const unsigned kINTEGER = 0x02; |
20 static const unsigned kBITSTRING = 0x03; | 20 static const unsigned kBITSTRING = 0x03; |
21 static const unsigned kOCTETSTRING = 0x04; | 21 static const unsigned kOCTETSTRING = 0x04; |
22 static const unsigned kOID = 0x06; | 22 static const unsigned kOID = 0x06; |
| 23 static const unsigned kENUMERATED = 0x0A; |
23 static const unsigned kSEQUENCE = 0x30; | 24 static const unsigned kSEQUENCE = 0x30; |
24 | 25 |
25 // These are flags that can be ORed with the above tag numbers. | 26 // These are flags that can be ORed with the above tag numbers. |
26 static const unsigned kContextSpecific = 0x80; | 27 static const unsigned kContextSpecific = 0x80; |
27 static const unsigned kConstructed = 0x20; | 28 static const unsigned kConstructed = 0x20; |
28 | 29 |
29 // kAny matches any tag value; | 30 // kAny matches any tag value; |
30 static const unsigned kAny = 0x10000; | 31 static const unsigned kAny = 0x10000; |
31 // kOptional denotes an optional element. | 32 // kOptional denotes an optional element. |
32 static const unsigned kOptional = 0x20000; | 33 static const unsigned kOptional = 0x20000; |
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46 bool ParseElement(base::StringPiece* in, | 47 bool ParseElement(base::StringPiece* in, |
47 unsigned tag_value, | 48 unsigned tag_value, |
48 base::StringPiece* out, | 49 base::StringPiece* out, |
49 unsigned *out_header_len); | 50 unsigned *out_header_len); |
50 | 51 |
51 // GetElement performs the same actions as ParseElement, except that the header | 52 // GetElement performs the same actions as ParseElement, except that the header |
52 // bytes are not included in the output. | 53 // bytes are not included in the output. |
53 // | 54 // |
54 // If |tag_value & kOptional| is true then this function cannot distinguish | 55 // If |tag_value & kOptional| is true then this function cannot distinguish |
55 // between a missing optional element and an empty one. | 56 // between a missing optional element and an empty one. |
56 bool GetElement(base::StringPiece* in, | 57 NET_EXPORT_PRIVATE bool GetElement(base::StringPiece* in, |
57 unsigned tag_value, | 58 unsigned tag_value, |
58 base::StringPiece* out); | 59 base::StringPiece* out); |
59 | 60 |
60 // ExtractSPKIFromDERCert parses the DER encoded certificate in |cert| and | 61 // ExtractSPKIFromDERCert parses the DER encoded certificate in |cert| and |
61 // extracts the bytes of the SubjectPublicKeyInfo. On successful return, | 62 // extracts the bytes of the SubjectPublicKeyInfo. On successful return, |
62 // |spki_out| is set to contain the SPKI, pointing into |cert|. | 63 // |spki_out| is set to contain the SPKI, pointing into |cert|. |
63 NET_EXPORT_PRIVATE bool ExtractSPKIFromDERCert(base::StringPiece cert, | 64 NET_EXPORT_PRIVATE bool ExtractSPKIFromDERCert(base::StringPiece cert, |
64 base::StringPiece* spki_out); | 65 base::StringPiece* spki_out); |
65 | 66 |
66 // ExtractSubjectPublicKeyFromSPKI parses the DER encoded SubjectPublicKeyInfo | 67 // ExtractSubjectPublicKeyFromSPKI parses the DER encoded SubjectPublicKeyInfo |
67 // in |spki| and extracts the bytes of the SubjectPublicKey. On successful | 68 // in |spki| and extracts the bytes of the SubjectPublicKey. On successful |
68 // return, |spk_out| is set to contain the public key, pointing into |spki|. | 69 // return, |spk_out| is set to contain the public key, pointing into |spki|. |
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84 // several locations as far as a CRL filter is concerned. | 85 // several locations as far as a CRL filter is concerned. |
85 NET_EXPORT_PRIVATE bool ExtractCRLURLsFromDERCert( | 86 NET_EXPORT_PRIVATE bool ExtractCRLURLsFromDERCert( |
86 base::StringPiece cert, | 87 base::StringPiece cert, |
87 std::vector<base::StringPiece>* urls_out); | 88 std::vector<base::StringPiece>* urls_out); |
88 | 89 |
89 } // namespace asn1 | 90 } // namespace asn1 |
90 | 91 |
91 } // namespace net | 92 } // namespace net |
92 | 93 |
93 #endif // NET_CERT_ASN1_UTIL_H_ | 94 #endif // NET_CERT_ASN1_UTIL_H_ |
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