420 lines
12 KiB
C
420 lines
12 KiB
C
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/*
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* Copyright 2008-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "internal/cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/pem.h>
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#include <openssl/rand.h>
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#include <openssl/x509v3.h>
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#include <openssl/err.h>
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#include <openssl/cms.h>
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#include <openssl/ess.h>
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#include "crypto/ess.h"
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#include "crypto/x509.h"
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#include "cms_local.h"
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IMPLEMENT_ASN1_FUNCTIONS(CMS_ReceiptRequest)
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/* ESS services */
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int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr)
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{
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ASN1_STRING *str;
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CMS_ReceiptRequest *rr;
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ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_receiptRequest);
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if (prr != NULL)
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*prr = NULL;
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str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
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if (str == NULL)
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return 0;
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rr = ASN1_item_unpack(str, ASN1_ITEM_rptr(CMS_ReceiptRequest));
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if (rr == NULL)
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return -1;
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if (prr != NULL)
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*prr = rr;
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else
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CMS_ReceiptRequest_free(rr);
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return 1;
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}
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/*
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* Returns 0 if attribute is not found, 1 if found,
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* or -1 on attribute parsing failure.
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*/
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static int ossl_cms_signerinfo_get_signing_cert(const CMS_SignerInfo *si,
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ESS_SIGNING_CERT **psc)
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{
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ASN1_STRING *str;
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ESS_SIGNING_CERT *sc;
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ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_signingCertificate);
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if (psc != NULL)
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*psc = NULL;
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str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
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if (str == NULL)
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return 0;
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sc = ASN1_item_unpack(str, ASN1_ITEM_rptr(ESS_SIGNING_CERT));
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if (sc == NULL)
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return -1;
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if (psc != NULL)
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*psc = sc;
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else
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ESS_SIGNING_CERT_free(sc);
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return 1;
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}
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/*
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* Returns 0 if attribute is not found, 1 if found,
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* or -1 on attribute parsing failure.
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*/
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static int ossl_cms_signerinfo_get_signing_cert_v2(const CMS_SignerInfo *si,
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ESS_SIGNING_CERT_V2 **psc)
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{
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ASN1_STRING *str;
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ESS_SIGNING_CERT_V2 *sc;
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ASN1_OBJECT *obj = OBJ_nid2obj(NID_id_smime_aa_signingCertificateV2);
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if (psc != NULL)
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*psc = NULL;
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str = CMS_signed_get0_data_by_OBJ(si, obj, -3, V_ASN1_SEQUENCE);
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if (str == NULL)
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return 0;
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sc = ASN1_item_unpack(str, ASN1_ITEM_rptr(ESS_SIGNING_CERT_V2));
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if (sc == NULL)
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return -1;
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if (psc != NULL)
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*psc = sc;
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else
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ESS_SIGNING_CERT_V2_free(sc);
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return 1;
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}
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int ossl_cms_check_signing_certs(const CMS_SignerInfo *si,
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const STACK_OF(X509) *chain)
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{
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ESS_SIGNING_CERT *ss = NULL;
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ESS_SIGNING_CERT_V2 *ssv2 = NULL;
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int ret = ossl_cms_signerinfo_get_signing_cert(si, &ss) >= 0
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&& ossl_cms_signerinfo_get_signing_cert_v2(si, &ssv2) >= 0
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&& OSSL_ESS_check_signing_certs(ss, ssv2, chain, 1) > 0;
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ESS_SIGNING_CERT_free(ss);
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ESS_SIGNING_CERT_V2_free(ssv2);
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return ret;
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}
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CMS_ReceiptRequest *CMS_ReceiptRequest_create0_ex(
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unsigned char *id, int idlen, int allorfirst,
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STACK_OF(GENERAL_NAMES) *receiptList, STACK_OF(GENERAL_NAMES) *receiptsTo,
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OSSL_LIB_CTX *libctx)
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{
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CMS_ReceiptRequest *rr;
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rr = CMS_ReceiptRequest_new();
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if (rr == NULL) {
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ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
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goto err;
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}
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if (id)
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ASN1_STRING_set0(rr->signedContentIdentifier, id, idlen);
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else {
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if (!ASN1_STRING_set(rr->signedContentIdentifier, NULL, 32)) {
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ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
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goto err;
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}
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if (RAND_bytes_ex(libctx, rr->signedContentIdentifier->data, 32,
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0) <= 0)
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goto err;
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}
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sk_GENERAL_NAMES_pop_free(rr->receiptsTo, GENERAL_NAMES_free);
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rr->receiptsTo = receiptsTo;
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if (receiptList != NULL) {
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rr->receiptsFrom->type = 1;
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rr->receiptsFrom->d.receiptList = receiptList;
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} else {
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rr->receiptsFrom->type = 0;
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rr->receiptsFrom->d.allOrFirstTier = allorfirst;
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}
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return rr;
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err:
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CMS_ReceiptRequest_free(rr);
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return NULL;
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}
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CMS_ReceiptRequest *CMS_ReceiptRequest_create0(
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unsigned char *id, int idlen, int allorfirst,
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STACK_OF(GENERAL_NAMES) *receiptList, STACK_OF(GENERAL_NAMES) *receiptsTo)
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{
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return CMS_ReceiptRequest_create0_ex(id, idlen, allorfirst, receiptList,
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receiptsTo, NULL);
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}
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int CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr)
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{
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unsigned char *rrder = NULL;
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int rrderlen, r = 0;
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rrderlen = i2d_CMS_ReceiptRequest(rr, &rrder);
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if (rrderlen < 0) {
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ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
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goto err;
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}
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if (!CMS_signed_add1_attr_by_NID(si, NID_id_smime_aa_receiptRequest,
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V_ASN1_SEQUENCE, rrder, rrderlen)) {
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ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
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goto err;
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}
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r = 1;
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err:
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OPENSSL_free(rrder);
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return r;
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}
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void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
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ASN1_STRING **pcid,
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int *pallorfirst,
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STACK_OF(GENERAL_NAMES) **plist,
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STACK_OF(GENERAL_NAMES) **prto)
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{
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if (pcid != NULL)
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*pcid = rr->signedContentIdentifier;
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if (rr->receiptsFrom->type == 0) {
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if (pallorfirst != NULL)
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*pallorfirst = (int)rr->receiptsFrom->d.allOrFirstTier;
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if (plist != NULL)
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*plist = NULL;
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} else {
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if (pallorfirst != NULL)
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*pallorfirst = -1;
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if (plist != NULL)
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*plist = rr->receiptsFrom->d.receiptList;
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}
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if (prto != NULL)
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*prto = rr->receiptsTo;
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}
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/* Digest a SignerInfo structure for msgSigDigest attribute processing */
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static int cms_msgSigDigest(CMS_SignerInfo *si,
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unsigned char *dig, unsigned int *diglen)
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{
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const EVP_MD *md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
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if (md == NULL)
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return 0;
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if (!ossl_asn1_item_digest_ex(ASN1_ITEM_rptr(CMS_Attributes_Verify), md,
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si->signedAttrs, dig, diglen,
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ossl_cms_ctx_get0_libctx(si->cms_ctx),
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ossl_cms_ctx_get0_propq(si->cms_ctx)))
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return 0;
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return 1;
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}
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/* Add a msgSigDigest attribute to a SignerInfo */
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int ossl_cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src)
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{
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unsigned char dig[EVP_MAX_MD_SIZE];
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unsigned int diglen;
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if (!cms_msgSigDigest(src, dig, &diglen)) {
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ERR_raise(ERR_LIB_CMS, CMS_R_MSGSIGDIGEST_ERROR);
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return 0;
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}
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if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
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V_ASN1_OCTET_STRING, dig, diglen)) {
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ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
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return 0;
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}
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return 1;
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}
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/* Verify signed receipt after it has already passed normal CMS verify */
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int ossl_cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
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{
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int r = 0, i;
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CMS_ReceiptRequest *rr = NULL;
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CMS_Receipt *rct = NULL;
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STACK_OF(CMS_SignerInfo) *sis, *osis;
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CMS_SignerInfo *si, *osi = NULL;
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ASN1_OCTET_STRING *msig, **pcont;
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ASN1_OBJECT *octype;
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unsigned char dig[EVP_MAX_MD_SIZE];
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unsigned int diglen;
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/* Get SignerInfos, also checks SignedData content type */
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osis = CMS_get0_SignerInfos(req_cms);
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sis = CMS_get0_SignerInfos(cms);
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if (!osis || !sis)
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goto err;
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if (sk_CMS_SignerInfo_num(sis) != 1) {
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ERR_raise(ERR_LIB_CMS, CMS_R_NEED_ONE_SIGNER);
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goto err;
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}
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/* Check receipt content type */
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if (OBJ_obj2nid(CMS_get0_eContentType(cms)) != NID_id_smime_ct_receipt) {
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ERR_raise(ERR_LIB_CMS, CMS_R_NOT_A_SIGNED_RECEIPT);
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goto err;
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}
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/* Extract and decode receipt content */
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pcont = CMS_get0_content(cms);
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if (pcont == NULL || *pcont == NULL) {
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ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT);
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goto err;
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}
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rct = ASN1_item_unpack(*pcont, ASN1_ITEM_rptr(CMS_Receipt));
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if (!rct) {
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ERR_raise(ERR_LIB_CMS, CMS_R_RECEIPT_DECODE_ERROR);
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goto err;
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}
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/* Locate original request */
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for (i = 0; i < sk_CMS_SignerInfo_num(osis); i++) {
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osi = sk_CMS_SignerInfo_value(osis, i);
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if (!ASN1_STRING_cmp(osi->signature, rct->originatorSignatureValue))
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break;
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}
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if (i == sk_CMS_SignerInfo_num(osis)) {
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ERR_raise(ERR_LIB_CMS, CMS_R_NO_MATCHING_SIGNATURE);
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goto err;
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}
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si = sk_CMS_SignerInfo_value(sis, 0);
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/* Get msgSigDigest value and compare */
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msig = CMS_signed_get0_data_by_OBJ(si,
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OBJ_nid2obj
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(NID_id_smime_aa_msgSigDigest), -3,
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V_ASN1_OCTET_STRING);
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if (!msig) {
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ERR_raise(ERR_LIB_CMS, CMS_R_NO_MSGSIGDIGEST);
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goto err;
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}
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if (!cms_msgSigDigest(osi, dig, &diglen)) {
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ERR_raise(ERR_LIB_CMS, CMS_R_MSGSIGDIGEST_ERROR);
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goto err;
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}
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if (diglen != (unsigned int)msig->length) {
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ERR_raise(ERR_LIB_CMS, CMS_R_MSGSIGDIGEST_WRONG_LENGTH);
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goto err;
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}
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if (memcmp(dig, msig->data, diglen)) {
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ERR_raise(ERR_LIB_CMS, CMS_R_MSGSIGDIGEST_VERIFICATION_FAILURE);
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goto err;
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}
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/* Compare content types */
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octype = CMS_signed_get0_data_by_OBJ(osi,
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OBJ_nid2obj(NID_pkcs9_contentType),
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-3, V_ASN1_OBJECT);
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if (!octype) {
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ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT_TYPE);
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goto err;
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}
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/* Compare details in receipt request */
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if (OBJ_cmp(octype, rct->contentType)) {
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ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_MISMATCH);
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goto err;
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}
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/* Get original receipt request details */
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if (CMS_get1_ReceiptRequest(osi, &rr) <= 0) {
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ERR_raise(ERR_LIB_CMS, CMS_R_NO_RECEIPT_REQUEST);
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goto err;
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||
|
|
}
|
||
|
|
|
||
|
|
if (ASN1_STRING_cmp(rr->signedContentIdentifier,
|
||
|
|
rct->signedContentIdentifier)) {
|
||
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_CONTENTIDENTIFIER_MISMATCH);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
r = 1;
|
||
|
|
|
||
|
|
err:
|
||
|
|
CMS_ReceiptRequest_free(rr);
|
||
|
|
M_ASN1_free_of(rct, CMS_Receipt);
|
||
|
|
return r;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Encode a Receipt into an OCTET STRING read for including into content of a
|
||
|
|
* SignedData ContentInfo.
|
||
|
|
*/
|
||
|
|
|
||
|
|
ASN1_OCTET_STRING *ossl_cms_encode_Receipt(CMS_SignerInfo *si)
|
||
|
|
{
|
||
|
|
CMS_Receipt rct;
|
||
|
|
CMS_ReceiptRequest *rr = NULL;
|
||
|
|
ASN1_OBJECT *ctype;
|
||
|
|
ASN1_OCTET_STRING *os = NULL;
|
||
|
|
|
||
|
|
/* Get original receipt request */
|
||
|
|
|
||
|
|
/* Get original receipt request details */
|
||
|
|
|
||
|
|
if (CMS_get1_ReceiptRequest(si, &rr) <= 0) {
|
||
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_NO_RECEIPT_REQUEST);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get original content type */
|
||
|
|
|
||
|
|
ctype = CMS_signed_get0_data_by_OBJ(si,
|
||
|
|
OBJ_nid2obj(NID_pkcs9_contentType),
|
||
|
|
-3, V_ASN1_OBJECT);
|
||
|
|
if (!ctype) {
|
||
|
|
ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT_TYPE);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
rct.version = 1;
|
||
|
|
rct.contentType = ctype;
|
||
|
|
rct.signedContentIdentifier = rr->signedContentIdentifier;
|
||
|
|
rct.originatorSignatureValue = si->signature;
|
||
|
|
|
||
|
|
os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
|
||
|
|
|
||
|
|
err:
|
||
|
|
CMS_ReceiptRequest_free(rr);
|
||
|
|
return os;
|
||
|
|
}
|