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cb224393 JH |
1 | #include "crypt_ver.h" |
2 | ||
3 | #ifdef SHA_POLARSSL /* remainder of file */ | |
4 | ||
5 | #include "polarssl/bignum.h" | |
6 | #include "polarssl/part-x509.h" | |
7 | #include "polarssl/private-x509parse_c.h" | |
8 | ||
9 | /* all calls are from src/pdkim/pdkim-rsa.c */ | |
10 | ||
11 | /* *************** begin copy from x509parse.c ********************/ | |
12 | /* | |
13 | * X.509 certificate and private key decoding | |
14 | * | |
15 | * Copyright (C) 2006-2010, Brainspark B.V. | |
16 | * | |
17 | * This file is part of PolarSSL (http://www.polarssl.org) | |
18 | * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> | |
19 | * | |
20 | * All rights reserved. | |
21 | * | |
22 | * This program is free software; you can redistribute it and/or modify | |
23 | * it under the terms of the GNU General Public License as published by | |
24 | * the Free Software Foundation; either version 2 of the License, or | |
25 | * (at your option) any later version. | |
26 | * | |
27 | * This program is distributed in the hope that it will be useful, | |
28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
30 | * GNU General Public License for more details. | |
31 | * | |
32 | * You should have received a copy of the GNU General Public License along | |
33 | * with this program; if not, write to the Free Software Foundation, Inc., | |
34 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
35 | */ | |
36 | /* | |
37 | * The ITU-T X.509 standard defines a certificat format for PKI. | |
38 | * | |
39 | * http://www.ietf.org/rfc/rfc2459.txt | |
40 | * http://www.ietf.org/rfc/rfc3279.txt | |
41 | * | |
42 | * ftp://ftp.rsasecurity.com/pub/pkcs/ascii/pkcs-1v2.asc | |
43 | * | |
44 | * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf | |
45 | * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf | |
46 | */ | |
47 | ||
48 | ||
49 | /* | |
50 | * ASN.1 DER decoding routines | |
51 | */ | |
52 | static int asn1_get_len( unsigned char **p, | |
53 | const unsigned char *end, | |
54 | int *len ) | |
55 | { | |
56 | if( ( end - *p ) < 1 ) | |
57 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); | |
58 | ||
59 | if( ( **p & 0x80 ) == 0 ) | |
60 | *len = *(*p)++; | |
61 | else | |
62 | { | |
63 | switch( **p & 0x7F ) | |
64 | { | |
65 | case 1: | |
66 | if( ( end - *p ) < 2 ) | |
67 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); | |
68 | ||
69 | *len = (*p)[1]; | |
70 | (*p) += 2; | |
71 | break; | |
72 | ||
73 | case 2: | |
74 | if( ( end - *p ) < 3 ) | |
75 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); | |
76 | ||
77 | *len = ( (*p)[1] << 8 ) | (*p)[2]; | |
78 | (*p) += 3; | |
79 | break; | |
80 | ||
81 | default: | |
82 | return( POLARSSL_ERR_ASN1_INVALID_LENGTH ); | |
83 | break; | |
84 | } | |
85 | } | |
86 | ||
87 | if( *len > (int) ( end - *p ) ) | |
88 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); | |
89 | ||
90 | return( 0 ); | |
91 | } | |
92 | ||
93 | /* This function is not exported by PolarSSL 0.14.2 | |
94 | * static */ | |
95 | int asn1_get_tag( unsigned char **p, | |
96 | const unsigned char *end, | |
97 | int *len, int tag ) | |
98 | { | |
99 | if( ( end - *p ) < 1 ) | |
100 | return( POLARSSL_ERR_ASN1_OUT_OF_DATA ); | |
101 | ||
102 | if( **p != tag ) | |
103 | return( POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); | |
104 | ||
105 | (*p)++; | |
106 | ||
107 | return( asn1_get_len( p, end, len ) ); | |
108 | } | |
109 | ||
110 | /* This function is not exported by PolarSSL 0.14.2 | |
111 | * static */ | |
112 | int asn1_get_int( unsigned char **p, | |
113 | const unsigned char *end, | |
114 | int *val ) | |
115 | { | |
116 | int ret, len; | |
117 | ||
118 | if( ( ret = asn1_get_tag( p, end, &len, ASN1_INTEGER ) ) != 0 ) | |
119 | return( ret ); | |
120 | ||
121 | if( len > (int) sizeof( int ) || ( **p & 0x80 ) != 0 ) | |
122 | return( POLARSSL_ERR_ASN1_INVALID_LENGTH ); | |
123 | ||
124 | *val = 0; | |
125 | ||
126 | while( len-- > 0 ) | |
127 | { | |
128 | *val = ( *val << 8 ) | **p; | |
129 | (*p)++; | |
130 | } | |
131 | ||
132 | return( 0 ); | |
133 | } | |
134 | ||
135 | /* This function is not exported by PolarSSL 0.14.2 | |
136 | * static */ | |
137 | int asn1_get_mpi( unsigned char **p, | |
138 | const unsigned char *end, | |
139 | mpi *X ) | |
140 | { | |
141 | int ret, len; | |
142 | ||
143 | if( ( ret = asn1_get_tag( p, end, &len, ASN1_INTEGER ) ) != 0 ) | |
144 | return( ret ); | |
145 | ||
146 | ret = mpi_read_binary( X, *p, len ); | |
147 | ||
148 | *p += len; | |
149 | ||
150 | return( ret ); | |
151 | } | |
152 | /* *************** end copy from x509parse.c ********************/ | |
153 | #endif |