release/src/router/openssl/crypto/x509v3/v3_scts.c

   1 /* v3_scts.c */
   2 /*
   3  * Written by Rob Stradling (rob@comodo.com) for the OpenSSL project 2014.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2014 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/asn1.h>
  62 #include <openssl/x509v3.h>
  63 #include "../ssl/ssl_locl.h"
  64
  65 #if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
  66 # define SCT_TIMESTAMP unsigned __int64
  67 #elif defined(__arch64__)
  68 # define SCT_TIMESTAMP unsigned long
  69 #else
  70 # define SCT_TIMESTAMP unsigned long long
  71 #endif
  72
  73 #define n2l8(c,l)       (l =((SCT_TIMESTAMP)(*((c)++)))<<56, \
  74                          l|=((SCT_TIMESTAMP)(*((c)++)))<<48, \
  75                          l|=((SCT_TIMESTAMP)(*((c)++)))<<40, \
  76                          l|=((SCT_TIMESTAMP)(*((c)++)))<<32, \
  77                          l|=((SCT_TIMESTAMP)(*((c)++)))<<24, \
  78                          l|=((SCT_TIMESTAMP)(*((c)++)))<<16, \
  79                          l|=((SCT_TIMESTAMP)(*((c)++)))<< 8, \
  80                          l|=((SCT_TIMESTAMP)(*((c)++))))
  81
  82 typedef struct SCT_st {
  83     /* The encoded SCT */
  84     unsigned char *sct;
  85     unsigned short sctlen;
  86     /*
  87      * Components of the SCT.  "logid", "ext" and "sig" point to addresses
  88      * inside "sct".
  89      */
  90     unsigned char version;
  91     unsigned char *logid;
  92     unsigned short logidlen;
  93     SCT_TIMESTAMP timestamp;
  94     unsigned char *ext;
  95     unsigned short extlen;
  96     unsigned char hash_alg;
  97     unsigned char sig_alg;
  98     unsigned char *sig;
  99     unsigned short siglen;
 100 } SCT;
 101
 102 DECLARE_STACK_OF(SCT)
 103
 104 static void SCT_LIST_free(STACK_OF(SCT) *a);
 105 static STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a,
 106                                    const unsigned char **pp, long length);
 107 static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
 108                         BIO *out, int indent);
 109
 110 const X509V3_EXT_METHOD v3_ct_scts[] = {
 111     {NID_ct_precert_scts, 0, NULL,
 112      0, (X509V3_EXT_FREE)SCT_LIST_free,
 113      (X509V3_EXT_D2I)d2i_SCT_LIST, 0,
 114      0, 0, 0, 0,
 115      (X509V3_EXT_I2R)i2r_SCT_LIST, 0,
 116      NULL},
 117
 118     {NID_ct_cert_scts, 0, NULL,
 119      0, (X509V3_EXT_FREE)SCT_LIST_free,
 120      (X509V3_EXT_D2I)d2i_SCT_LIST, 0,
 121      0, 0, 0, 0,
 122      (X509V3_EXT_I2R)i2r_SCT_LIST, 0,
 123      NULL},
 124 };
 125
 126 static void tls12_signature_print(BIO *out, const unsigned char hash_alg,
 127                                   const unsigned char sig_alg)
 128 {
 129     int nid = NID_undef;
 130     /* RFC6962 only permits two signature algorithms */
 131     if (hash_alg == TLSEXT_hash_sha256) {
 132         if (sig_alg == TLSEXT_signature_rsa)
 133             nid = NID_sha256WithRSAEncryption;
 134         else if (sig_alg == TLSEXT_signature_ecdsa)
 135             nid = NID_ecdsa_with_SHA256;
 136     }
 137     if (nid == NID_undef)
 138         BIO_printf(out, "%02X%02X", hash_alg, sig_alg);
 139     else
 140         BIO_printf(out, "%s", OBJ_nid2ln(nid));
 141 }
 142
 143 static void timestamp_print(BIO *out, SCT_TIMESTAMP timestamp)
 144 {
 145     ASN1_GENERALIZEDTIME *gen;
 146     char genstr[20];
 147     gen = ASN1_GENERALIZEDTIME_new();
 148     ASN1_GENERALIZEDTIME_adj(gen, (time_t)0,
 149                              (int)(timestamp / 86400000),
 150                              (timestamp % 86400000) / 1000);
 151     /*
 152      * Note GeneralizedTime from ASN1_GENERALIZETIME_adj is always 15
 153      * characters long with a final Z. Update it with fractional seconds.
 154      */
 155     BIO_snprintf(genstr, sizeof(genstr), "%.14s.%03dZ",
 156                  ASN1_STRING_data(gen), (unsigned int)(timestamp % 1000));
 157     ASN1_GENERALIZEDTIME_set_string(gen, genstr);
 158     ASN1_GENERALIZEDTIME_print(out, gen);
 159     ASN1_GENERALIZEDTIME_free(gen);
 160 }
 161
 162 static void SCT_free(SCT *sct)
 163 {
 164     if (sct) {
 165         if (sct->sct)
 166             OPENSSL_free(sct->sct);
 167         OPENSSL_free(sct);
 168     }
 169 }
 170
 171 static void SCT_LIST_free(STACK_OF(SCT) *a)
 172 {
 173     sk_SCT_pop_free(a, SCT_free);
 174 }
 175
 176 static STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a,
 177                                    const unsigned char **pp, long length)
 178 {
 179     ASN1_OCTET_STRING *oct = NULL;
 180     STACK_OF(SCT) *sk = NULL;
 181     SCT *sct;
 182     unsigned char *p, *p2;
 183     unsigned short listlen, sctlen = 0, fieldlen;
 184
 185     if (d2i_ASN1_OCTET_STRING(&oct, pp, length) == NULL)
 186         return NULL;
 187     if (oct->length < 2)
 188         goto done;
 189     p = oct->data;
 190     n2s(p, listlen);
 191     if (listlen != oct->length - 2)
 192         goto done;
 193
 194     if ((sk = sk_SCT_new_null()) == NULL)
 195         goto done;
 196
 197     while (listlen > 0) {
 198         if (listlen < 2)
 199             goto err;
 200         n2s(p, sctlen);
 201         listlen -= 2;
 202
 203         if ((sctlen < 1) || (sctlen > listlen))
 204             goto err;
 205         listlen -= sctlen;
 206
 207         sct = OPENSSL_malloc(sizeof(SCT));
 208         if (!sct)
 209             goto err;
 210         if (!sk_SCT_push(sk, sct)) {
 211             OPENSSL_free(sct);
 212             goto err;
 213         }
 214
 215         sct->sct = OPENSSL_malloc(sctlen);
 216         if (!sct->sct)
 217             goto err;
 218         memcpy(sct->sct, p, sctlen);
 219         sct->sctlen = sctlen;
 220         p += sctlen;
 221         p2 = sct->sct;
 222
 223         sct->version = *p2++;
 224         if (sct->version == 0) { /* SCT v1 */
 225             /*-
 226              * Fixed-length header:
 227              *              struct {
 228              * (1 byte)       Version sct_version;
 229              * (32 bytes)     LogID id;
 230              * (8 bytes)      uint64 timestamp;
 231              * (2 bytes + ?)  CtExtensions extensions;
 232              */
 233             if (sctlen < 43)
 234                 goto err;
 235             sctlen -= 43;
 236
 237             sct->logid = p2;
 238             sct->logidlen = 32;
 239             p2 += 32;
 240
 241             n2l8(p2, sct->timestamp);
 242
 243             n2s(p2, fieldlen);
 244             if (sctlen < fieldlen)
 245                 goto err;
 246             sct->ext = p2;
 247             sct->extlen = fieldlen;
 248             p2 += fieldlen;
 249             sctlen -= fieldlen;
 250
 251             /*-
 252              * digitally-signed struct header:
 253              * (1 byte)       Hash algorithm
 254              * (1 byte)       Signature algorithm
 255              * (2 bytes + ?)  Signature
 256              */
 257             if (sctlen < 4)
 258                 goto err;
 259             sctlen -= 4;
 260
 261             sct->hash_alg = *p2++;
 262             sct->sig_alg = *p2++;
 263             n2s(p2, fieldlen);
 264             if (sctlen != fieldlen)
 265                 goto err;
 266             sct->sig = p2;
 267             sct->siglen = fieldlen;
 268         }
 269     }
 270
 271  done:
 272     ASN1_OCTET_STRING_free(oct);
 273     return sk;
 274
 275  err:
 276     SCT_LIST_free(sk);
 277     sk = NULL;
 278     goto done;
 279 }
 280
 281 static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
 282                         BIO *out, int indent)
 283 {
 284     SCT *sct;
 285     int i;
 286
 287     for (i = 0; i < sk_SCT_num(sct_list);) {
 288         sct = sk_SCT_value(sct_list, i);
 289
 290         BIO_printf(out, "%*sSigned Certificate Timestamp:", indent, "");
 291         BIO_printf(out, "\n%*sVersion   : ", indent + 4, "");
 292
 293         if (sct->version == 0) { /* SCT v1 */
 294             BIO_printf(out, "v1(0)");
 295
 296             BIO_printf(out, "\n%*sLog ID    : ", indent + 4, "");
 297             BIO_hex_string(out, indent + 16, 16, sct->logid, sct->logidlen);
 298
 299             BIO_printf(out, "\n%*sTimestamp : ", indent + 4, "");
 300             timestamp_print(out, sct->timestamp);
 301
 302             BIO_printf(out, "\n%*sExtensions: ", indent + 4, "");
 303             if (sct->extlen == 0)
 304                 BIO_printf(out, "none");
 305             else
 306                 BIO_hex_string(out, indent + 16, 16, sct->ext, sct->extlen);
 307
 308             BIO_printf(out, "\n%*sSignature : ", indent + 4, "");
 309             tls12_signature_print(out, sct->hash_alg, sct->sig_alg);
 310             BIO_printf(out, "\n%*s            ", indent + 4, "");
 311             BIO_hex_string(out, indent + 16, 16, sct->sig, sct->siglen);
 312         } else {                /* Unknown version */
 313
 314             BIO_printf(out, "unknown\n%*s", indent + 16, "");
 315             BIO_hex_string(out, indent + 16, 16, sct->sct, sct->sctlen);
 316         }
 317
 318         if (++i < sk_SCT_num(sct_list))
 319             BIO_printf(out, "\n");
 320     }
 321
 322     return 1;
 323 }