crypto/x509/x509_att.c

   1 /*
   2  * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/safestack.h>
  13 #include <openssl/asn1.h>
  14 #include <openssl/objects.h>
  15 #include <openssl/evp.h>
  16 #include <openssl/x509.h>
  17 #include <openssl/x509v3.h>
  18 #include "crypto/x509.h"
  19 #include "x509_local.h"
  20
  21 int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
  22 {
  23     return sk_X509_ATTRIBUTE_num(x);
  24 }
  25
  26 int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,
  27                            int lastpos)
  28 {
  29     const ASN1_OBJECT *obj = OBJ_nid2obj(nid);
  30
  31     if (obj == NULL)
  32         return -2;
  33     return X509at_get_attr_by_OBJ(x, obj, lastpos);
  34 }
  35
  36 int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk,
  37                            const ASN1_OBJECT *obj, int lastpos)
  38 {
  39     int n;
  40     X509_ATTRIBUTE *ex;
  41
  42     if (sk == NULL)
  43         return -1;
  44     lastpos++;
  45     if (lastpos < 0)
  46         lastpos = 0;
  47     n = sk_X509_ATTRIBUTE_num(sk);
  48     for (; lastpos < n; lastpos++) {
  49         ex = sk_X509_ATTRIBUTE_value(sk, lastpos);
  50         if (OBJ_cmp(ex->object, obj) == 0)
  51             return lastpos;
  52     }
  53     return -1;
  54 }
  55
  56 X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
  57 {
  58     if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
  59         return NULL;
  60
  61     return sk_X509_ATTRIBUTE_value(x, loc);
  62 }
  63
  64 X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
  65 {
  66     X509_ATTRIBUTE *ret;
  67
  68     if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
  69         return NULL;
  70     ret = sk_X509_ATTRIBUTE_delete(x, loc);
  71     return ret;
  72 }
  73
  74 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
  75                                            X509_ATTRIBUTE *attr)
  76 {
  77     X509_ATTRIBUTE *new_attr = NULL;
  78     STACK_OF(X509_ATTRIBUTE) *sk = NULL;
  79
  80     if (x == NULL) {
  81         ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
  82         goto err2;
  83     }
  84
  85     if (*x == NULL) {
  86         if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
  87             goto err;
  88     } else {
  89         sk = *x;
  90     }
  91
  92     if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL)
  93         goto err2;
  94     if (!sk_X509_ATTRIBUTE_push(sk, new_attr))
  95         goto err;
  96     if (*x == NULL)
  97         *x = sk;
  98     return sk;
  99  err:
 100     ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 101  err2:
 102     X509_ATTRIBUTE_free(new_attr);
 103     if (*x == NULL)
 104         sk_X509_ATTRIBUTE_free(sk);
 105     return NULL;
 106 }
 107
 108 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE)
 109                                                   **x, const ASN1_OBJECT *obj,
 110                                                   int type,
 111                                                   const unsigned char *bytes,
 112                                                   int len)
 113 {
 114     X509_ATTRIBUTE *attr;
 115     STACK_OF(X509_ATTRIBUTE) *ret;
 116     attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
 117     if (!attr)
 118         return 0;
 119     ret = X509at_add1_attr(x, attr);
 120     X509_ATTRIBUTE_free(attr);
 121     return ret;
 122 }
 123
 124 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE)
 125                                                   **x, int nid, int type,
 126                                                   const unsigned char *bytes,
 127                                                   int len)
 128 {
 129     X509_ATTRIBUTE *attr;
 130     STACK_OF(X509_ATTRIBUTE) *ret;
 131     attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
 132     if (!attr)
 133         return 0;
 134     ret = X509at_add1_attr(x, attr);
 135     X509_ATTRIBUTE_free(attr);
 136     return ret;
 137 }
 138
 139 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE)
 140                                                   **x, const char *attrname,
 141                                                   int type,
 142                                                   const unsigned char *bytes,
 143                                                   int len)
 144 {
 145     X509_ATTRIBUTE *attr;
 146     STACK_OF(X509_ATTRIBUTE) *ret;
 147     attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
 148     if (!attr)
 149         return 0;
 150     ret = X509at_add1_attr(x, attr);
 151     X509_ATTRIBUTE_free(attr);
 152     return ret;
 153 }
 154
 155 void *X509at_get0_data_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *x,
 156                               const ASN1_OBJECT *obj, int lastpos, int type)
 157 {
 158     int i;
 159     X509_ATTRIBUTE *at;
 160     i = X509at_get_attr_by_OBJ(x, obj, lastpos);
 161     if (i == -1)
 162         return NULL;
 163     if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))
 164         return NULL;
 165     at = X509at_get_attr(x, i);
 166     if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))
 167         return NULL;
 168     return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
 169 }
 170
 171 STACK_OF(X509_ATTRIBUTE) *ossl_x509at_dup(const STACK_OF(X509_ATTRIBUTE) *x)
 172 {
 173     int i, n;
 174     STACK_OF(X509_ATTRIBUTE) *sk = NULL;
 175
 176     n = sk_X509_ATTRIBUTE_num(x);
 177     for (i = 0; i < n; ++i) {
 178         X509_ATTRIBUTE *attr = sk_X509_ATTRIBUTE_value(x, i);
 179
 180         if (X509at_add1_attr(&sk, attr) == NULL) {
 181             sk_X509_ATTRIBUTE_pop_free(sk, X509_ATTRIBUTE_free);
 182             return NULL;
 183         }
 184     }
 185     return sk;
 186 }
 187
 188 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,
 189                                              int atrtype, const void *data,
 190                                              int len)
 191 {
 192     ASN1_OBJECT *obj;
 193     X509_ATTRIBUTE *ret;
 194
 195     obj = OBJ_nid2obj(nid);
 196     if (obj == NULL) {
 197         ERR_raise(ERR_LIB_X509, X509_R_UNKNOWN_NID);
 198         return NULL;
 199     }
 200     ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len);
 201     if (ret == NULL)
 202         ASN1_OBJECT_free(obj);
 203     return ret;
 204 }
 205
 206 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,
 207                                              const ASN1_OBJECT *obj,
 208                                              int atrtype, const void *data,
 209                                              int len)
 210 {
 211     X509_ATTRIBUTE *ret;
 212
 213     if ((attr == NULL) || (*attr == NULL)) {
 214         if ((ret = X509_ATTRIBUTE_new()) == NULL) {
 215             ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 216             return NULL;
 217         }
 218     } else
 219         ret = *attr;
 220
 221     if (!X509_ATTRIBUTE_set1_object(ret, obj))
 222         goto err;
 223     if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len))
 224         goto err;
 225
 226     if ((attr != NULL) && (*attr == NULL))
 227         *attr = ret;
 228     return ret;
 229  err:
 230     if ((attr == NULL) || (ret != *attr))
 231         X509_ATTRIBUTE_free(ret);
 232     return NULL;
 233 }
 234
 235 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,
 236                                              const char *atrname, int type,
 237                                              const unsigned char *bytes,
 238                                              int len)
 239 {
 240     ASN1_OBJECT *obj;
 241     X509_ATTRIBUTE *nattr;
 242
 243     obj = OBJ_txt2obj(atrname, 0);
 244     if (obj == NULL) {
 245         ERR_raise_data(ERR_LIB_X509, X509_R_INVALID_FIELD_NAME,
 246                        "name=%s", atrname);
 247         return NULL;
 248     }
 249     nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len);
 250     ASN1_OBJECT_free(obj);
 251     return nattr;
 252 }
 253
 254 int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
 255 {
 256     if ((attr == NULL) || (obj == NULL))
 257         return 0;
 258     ASN1_OBJECT_free(attr->object);
 259     attr->object = OBJ_dup(obj);
 260     return attr->object != NULL;
 261 }
 262
 263 int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype,
 264                              const void *data, int len)
 265 {
 266     ASN1_TYPE *ttmp = NULL;
 267     ASN1_STRING *stmp = NULL;
 268     int atype = 0;
 269     if (!attr)
 270         return 0;
 271     if (attrtype & MBSTRING_FLAG) {
 272         stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
 273                                       OBJ_obj2nid(attr->object));
 274         if (!stmp) {
 275             ERR_raise(ERR_LIB_X509, ERR_R_ASN1_LIB);
 276             return 0;
 277         }
 278         atype = stmp->type;
 279     } else if (len != -1) {
 280         if ((stmp = ASN1_STRING_type_new(attrtype)) == NULL)
 281             goto err;
 282         if (!ASN1_STRING_set(stmp, data, len))
 283             goto err;
 284         atype = attrtype;
 285     }
 286     /*
 287      * This is a bit naughty because the attribute should really have at
 288      * least one value but some types use and zero length SET and require
 289      * this.
 290      */
 291     if (attrtype == 0) {
 292         ASN1_STRING_free(stmp);
 293         return 1;
 294     }
 295     if ((ttmp = ASN1_TYPE_new()) == NULL)
 296         goto err;
 297     if ((len == -1) && !(attrtype & MBSTRING_FLAG)) {
 298         if (!ASN1_TYPE_set1(ttmp, attrtype, data))
 299             goto err;
 300     } else {
 301         ASN1_TYPE_set(ttmp, atype, stmp);
 302         stmp = NULL;
 303     }
 304     if (!sk_ASN1_TYPE_push(attr->set, ttmp))
 305         goto err;
 306     return 1;
 307  err:
 308     ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
 309     ASN1_TYPE_free(ttmp);
 310     ASN1_STRING_free(stmp);
 311     return 0;
 312 }
 313
 314 int X509_ATTRIBUTE_count(const X509_ATTRIBUTE *attr)
 315 {
 316     if (attr == NULL)
 317         return 0;
 318     return sk_ASN1_TYPE_num(attr->set);
 319 }
 320
 321 ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
 322 {
 323     if (attr == NULL)
 324         return NULL;
 325     return attr->object;
 326 }
 327
 328 void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,
 329                                int atrtype, void *data)
 330 {
 331     ASN1_TYPE *ttmp;
 332     ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
 333     if (!ttmp)
 334         return NULL;
 335     if (atrtype == V_ASN1_BOOLEAN
 336             || atrtype == V_ASN1_NULL
 337             || atrtype != ASN1_TYPE_get(ttmp)) {
 338         ERR_raise(ERR_LIB_X509, X509_R_WRONG_TYPE);
 339         return NULL;
 340     }
 341     return ttmp->value.ptr;
 342 }
 343
 344 ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
 345 {
 346     if (attr == NULL)
 347         return NULL;
 348     return sk_ASN1_TYPE_value(attr->set, idx);
 349 }