204 lines
6.2 KiB
C
204 lines
6.2 KiB
C
/* v3_scts.c */
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/* Written by Rob Stradling (rob@comodo.com) for the OpenSSL project 2014.
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*/
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/* ====================================================================
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* Copyright (c) 2014 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/asn1.h>
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#include <openssl/x509v3.h>
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#include <openssl/bn.h>
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#include "../ssl/ssl_locl.h"
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static int i2r_scts(X509V3_EXT_METHOD *method, ASN1_OCTET_STRING *oct, BIO *out, int indent);
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const X509V3_EXT_METHOD v3_ct_scts[] = {
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{ NID_ct_precert_scts, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
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0,0,0,0,
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0,0,0,0,
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(X509V3_EXT_I2R)i2r_scts, NULL,
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NULL},
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{ NID_ct_cert_scts, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
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0,0,0,0,
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0,0,0,0,
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(X509V3_EXT_I2R)i2r_scts, NULL,
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NULL},
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};
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static void tls12_signature_print(BIO *out, const unsigned char *data)
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{
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int nid = NID_undef;
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/* RFC6962 only permits two signature algorithms */
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if (data[0] == TLSEXT_hash_sha256)
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{
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if (data[1] == TLSEXT_signature_rsa)
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nid = NID_sha256WithRSAEncryption;
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else if (data[1] == TLSEXT_signature_ecdsa)
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nid = NID_ecdsa_with_SHA256;
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}
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if (nid == NID_undef)
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BIO_printf(out, "%02X%02X", data[0], data[1]);
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else
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BIO_printf(out, "%s", OBJ_nid2ln(nid));
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}
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static void timestamp_print(BIO *out, BN_ULLONG timestamp)
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{
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ASN1_GENERALIZEDTIME *gen;
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char genstr[20];
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gen = ASN1_GENERALIZEDTIME_new();
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ASN1_GENERALIZEDTIME_adj(gen, (time_t)0,
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(int)(timestamp / 86400000),
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(timestamp % 86400000) / 1000);
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/* Note GeneralizedTime from ASN1_GENERALIZETIME_adj is always 15
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* characters long with a final Z. Update it with fractional seconds.
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*/
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BIO_snprintf(genstr, sizeof(genstr), "%.14s.%03dZ",
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ASN1_STRING_data(gen),
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(unsigned int)(timestamp % 1000));
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ASN1_GENERALIZEDTIME_set_string(gen, genstr);
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ASN1_GENERALIZEDTIME_print(out, gen);
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ASN1_GENERALIZEDTIME_free(gen);
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}
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static int i2r_scts(X509V3_EXT_METHOD *method, ASN1_OCTET_STRING *oct,
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BIO *out, int indent)
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{
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BN_ULLONG timestamp;
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unsigned char* data = oct->data;
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unsigned short listlen, sctlen = 0, fieldlen;
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if (oct->length < 2)
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return 0;
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n2s(data, listlen);
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if (listlen != oct->length - 2)
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return 0;
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while (listlen > 0)
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{
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if (listlen < 2)
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return 0;
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n2s(data, sctlen);
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listlen -= 2;
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if ((sctlen < 1) || (sctlen > listlen))
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return 0;
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listlen -= sctlen;
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BIO_printf(out, "%*sSigned Certificate Timestamp:", indent,
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"");
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if (*data == 0) /* SCT v1 */
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{
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/* Fixed-length header:
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* struct {
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* (1 byte) Version sct_version;
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* (32 bytes) LogID id;
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* (8 bytes) uint64 timestamp;
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* (2 bytes + ?) CtExtensions extensions;
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*/
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if (sctlen < 43)
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return 0;
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sctlen -= 43;
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BIO_printf(out, "\n%*sVersion : v1(0)", indent + 4,
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"");
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BIO_printf(out, "\n%*sLog ID : ", indent + 4, "");
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BIO_hex_string(out, indent + 16, 16, data + 1, 32);
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data += 33;
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n2l8(data, timestamp);
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BIO_printf(out, "\n%*sTimestamp : ", indent + 4, "");
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timestamp_print(out, timestamp);
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n2s(data, fieldlen);
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if (sctlen < fieldlen)
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return 0;
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sctlen -= fieldlen;
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BIO_printf(out, "\n%*sExtensions: ", indent + 4, "");
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if (fieldlen == 0)
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BIO_printf(out, "none");
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else
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BIO_hex_string(out, indent + 16, 16, data,
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fieldlen);
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data += fieldlen;
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/* digitally-signed struct header:
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* (1 byte) Hash algorithm
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* (1 byte) Signature algorithm
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* (2 bytes + ?) Signature
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*/
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if (sctlen < 4)
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return 0;
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sctlen -= 4;
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BIO_printf(out, "\n%*sSignature : ", indent + 4, "");
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tls12_signature_print(out, data);
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data += 2;
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n2s(data, fieldlen);
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if (sctlen != fieldlen)
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return 0;
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BIO_printf(out, "\n%*s ", indent + 4, "");
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BIO_hex_string(out, indent + 16, 16, data, fieldlen);
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if (listlen > 0) BIO_printf(out, "\n");
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data += fieldlen;
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}
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}
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return 1;
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}
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