1 /* $OpenBSD: x_req.c,v 1.14 2015/02/11 03:39:51 jsing Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 61 #include <openssl/asn1t.h> 62 #include <openssl/x509.h> 63 64 /* X509_REQ_INFO is handled in an unusual way to get round 65 * invalid encodings. Some broken certificate requests don't 66 * encode the attributes field if it is empty. This is in 67 * violation of PKCS#10 but we need to tolerate it. We do 68 * this by making the attributes field OPTIONAL then using 69 * the callback to initialise it to an empty STACK. 70 * 71 * This means that the field will be correctly encoded unless 72 * we NULL out the field. 73 * 74 * As a result we no longer need the req_kludge field because 75 * the information is now contained in the attributes field: 76 * 1. If it is NULL then it's the invalid omission. 77 * 2. If it is empty it is the correct encoding. 78 * 3. If it is not empty then some attributes are present. 79 * 80 */ 81 82 static int 83 rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 84 { 85 X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval; 86 87 if (operation == ASN1_OP_NEW_POST) { 88 rinf->attributes = sk_X509_ATTRIBUTE_new_null(); 89 if (!rinf->attributes) 90 return 0; 91 } 92 return 1; 93 } 94 95 static const ASN1_AUX X509_REQ_INFO_aux = { 96 .flags = ASN1_AFLG_ENCODING, 97 .asn1_cb = rinf_cb, 98 .enc_offset = offsetof(X509_REQ_INFO, enc), 99 }; 100 static const ASN1_TEMPLATE X509_REQ_INFO_seq_tt[] = { 101 { 102 .offset = offsetof(X509_REQ_INFO, version), 103 .field_name = "version", 104 .item = &ASN1_INTEGER_it, 105 }, 106 { 107 .offset = offsetof(X509_REQ_INFO, subject), 108 .field_name = "subject", 109 .item = &X509_NAME_it, 110 }, 111 { 112 .offset = offsetof(X509_REQ_INFO, pubkey), 113 .field_name = "pubkey", 114 .item = &X509_PUBKEY_it, 115 }, 116 /* This isn't really OPTIONAL but it gets round invalid 117 * encodings 118 */ 119 { 120 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SET_OF | ASN1_TFLG_OPTIONAL, 121 .offset = offsetof(X509_REQ_INFO, attributes), 122 .field_name = "attributes", 123 .item = &X509_ATTRIBUTE_it, 124 }, 125 }; 126 127 const ASN1_ITEM X509_REQ_INFO_it = { 128 .itype = ASN1_ITYPE_SEQUENCE, 129 .utype = V_ASN1_SEQUENCE, 130 .templates = X509_REQ_INFO_seq_tt, 131 .tcount = sizeof(X509_REQ_INFO_seq_tt) / sizeof(ASN1_TEMPLATE), 132 .funcs = &X509_REQ_INFO_aux, 133 .size = sizeof(X509_REQ_INFO), 134 .sname = "X509_REQ_INFO", 135 }; 136 137 138 X509_REQ_INFO * 139 d2i_X509_REQ_INFO(X509_REQ_INFO **a, const unsigned char **in, long len) 140 { 141 return (X509_REQ_INFO *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 142 &X509_REQ_INFO_it); 143 } 144 145 int 146 i2d_X509_REQ_INFO(X509_REQ_INFO *a, unsigned char **out) 147 { 148 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_REQ_INFO_it); 149 } 150 151 X509_REQ_INFO * 152 X509_REQ_INFO_new(void) 153 { 154 return (X509_REQ_INFO *)ASN1_item_new(&X509_REQ_INFO_it); 155 } 156 157 void 158 X509_REQ_INFO_free(X509_REQ_INFO *a) 159 { 160 ASN1_item_free((ASN1_VALUE *)a, &X509_REQ_INFO_it); 161 } 162 163 static const ASN1_AUX X509_REQ_aux = { 164 .app_data = NULL, 165 .flags = ASN1_AFLG_REFCOUNT, 166 .ref_offset = offsetof(X509_REQ, references), 167 .ref_lock = CRYPTO_LOCK_X509_REQ, 168 }; 169 static const ASN1_TEMPLATE X509_REQ_seq_tt[] = { 170 { 171 .offset = offsetof(X509_REQ, req_info), 172 .field_name = "req_info", 173 .item = &X509_REQ_INFO_it, 174 }, 175 { 176 .offset = offsetof(X509_REQ, sig_alg), 177 .field_name = "sig_alg", 178 .item = &X509_ALGOR_it, 179 }, 180 { 181 .offset = offsetof(X509_REQ, signature), 182 .field_name = "signature", 183 .item = &ASN1_BIT_STRING_it, 184 }, 185 }; 186 187 const ASN1_ITEM X509_REQ_it = { 188 .itype = ASN1_ITYPE_SEQUENCE, 189 .utype = V_ASN1_SEQUENCE, 190 .templates = X509_REQ_seq_tt, 191 .tcount = sizeof(X509_REQ_seq_tt) / sizeof(ASN1_TEMPLATE), 192 .funcs = &X509_REQ_aux, 193 .size = sizeof(X509_REQ), 194 .sname = "X509_REQ", 195 }; 196 197 198 X509_REQ * 199 d2i_X509_REQ(X509_REQ **a, const unsigned char **in, long len) 200 { 201 return (X509_REQ *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 202 &X509_REQ_it); 203 } 204 205 int 206 i2d_X509_REQ(X509_REQ *a, unsigned char **out) 207 { 208 return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_REQ_it); 209 } 210 211 X509_REQ * 212 X509_REQ_new(void) 213 { 214 return (X509_REQ *)ASN1_item_new(&X509_REQ_it); 215 } 216 217 void 218 X509_REQ_free(X509_REQ *a) 219 { 220 ASN1_item_free((ASN1_VALUE *)a, &X509_REQ_it); 221 } 222 223 X509_REQ * 224 X509_REQ_dup(X509_REQ *x) 225 { 226 return ASN1_item_dup(&X509_REQ_it, x); 227 } 228