[331] | 1 | /*
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| 2 | * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include "internal/cryptlib.h"
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| 11 | #include <openssl/asn1t.h>
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| 12 | #include <openssl/pem.h>
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| 13 | #include <openssl/x509.h>
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| 14 | #include <openssl/x509v3.h>
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| 15 | #include <openssl/err.h>
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| 16 | #include <openssl/cms.h>
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| 17 | #include "cms_lcl.h"
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| 18 | #include "internal/asn1_int.h"
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| 19 | #include "internal/evp_int.h"
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| 20 |
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| 21 | /* CMS SignedData Utilities */
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| 22 |
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| 23 | static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
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| 24 | {
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| 25 | if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) {
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| 26 | CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
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| 27 | return NULL;
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| 28 | }
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| 29 | return cms->d.signedData;
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| 30 | }
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| 31 |
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| 32 | static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
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| 33 | {
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| 34 | if (cms->d.other == NULL) {
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| 35 | cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
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| 36 | if (!cms->d.signedData) {
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| 37 | CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE);
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| 38 | return NULL;
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| 39 | }
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| 40 | cms->d.signedData->version = 1;
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| 41 | cms->d.signedData->encapContentInfo->eContentType =
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| 42 | OBJ_nid2obj(NID_pkcs7_data);
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| 43 | cms->d.signedData->encapContentInfo->partial = 1;
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| 44 | ASN1_OBJECT_free(cms->contentType);
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| 45 | cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
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| 46 | return cms->d.signedData;
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| 47 | }
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| 48 | return cms_get0_signed(cms);
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| 49 | }
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| 50 |
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| 51 | /* Just initialise SignedData e.g. for certs only structure */
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| 52 |
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| 53 | int CMS_SignedData_init(CMS_ContentInfo *cms)
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| 54 | {
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| 55 | if (cms_signed_data_init(cms))
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| 56 | return 1;
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| 57 | else
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| 58 | return 0;
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| 59 | }
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| 60 |
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| 61 | /* Check structures and fixup version numbers (if necessary) */
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| 62 |
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| 63 | static void cms_sd_set_version(CMS_SignedData *sd)
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| 64 | {
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| 65 | int i;
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| 66 | CMS_CertificateChoices *cch;
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| 67 | CMS_RevocationInfoChoice *rch;
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| 68 | CMS_SignerInfo *si;
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| 69 |
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| 70 | for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) {
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| 71 | cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
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| 72 | if (cch->type == CMS_CERTCHOICE_OTHER) {
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| 73 | if (sd->version < 5)
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| 74 | sd->version = 5;
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| 75 | } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
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| 76 | if (sd->version < 4)
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| 77 | sd->version = 4;
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| 78 | } else if (cch->type == CMS_CERTCHOICE_V1ACERT) {
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| 79 | if (sd->version < 3)
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| 80 | sd->version = 3;
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| 81 | }
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| 82 | }
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| 83 |
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| 84 | for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) {
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| 85 | rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
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| 86 | if (rch->type == CMS_REVCHOICE_OTHER) {
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| 87 | if (sd->version < 5)
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| 88 | sd->version = 5;
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| 89 | }
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| 90 | }
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| 91 |
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| 92 | if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
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| 93 | && (sd->version < 3))
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| 94 | sd->version = 3;
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| 95 |
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| 96 | for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
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| 97 | si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
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| 98 | if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
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| 99 | if (si->version < 3)
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| 100 | si->version = 3;
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| 101 | if (sd->version < 3)
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| 102 | sd->version = 3;
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| 103 | } else if (si->version < 1)
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| 104 | si->version = 1;
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| 105 | }
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| 106 |
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| 107 | if (sd->version < 1)
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| 108 | sd->version = 1;
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| 109 |
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| 110 | }
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| 111 |
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| 112 | /* Copy an existing messageDigest value */
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| 113 |
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| 114 | static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
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| 115 | {
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| 116 | STACK_OF(CMS_SignerInfo) *sinfos;
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| 117 | CMS_SignerInfo *sitmp;
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| 118 | int i;
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| 119 | sinfos = CMS_get0_SignerInfos(cms);
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| 120 | for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
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| 121 | ASN1_OCTET_STRING *messageDigest;
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| 122 | sitmp = sk_CMS_SignerInfo_value(sinfos, i);
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| 123 | if (sitmp == si)
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| 124 | continue;
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| 125 | if (CMS_signed_get_attr_count(sitmp) < 0)
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| 126 | continue;
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| 127 | if (OBJ_cmp(si->digestAlgorithm->algorithm,
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| 128 | sitmp->digestAlgorithm->algorithm))
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| 129 | continue;
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| 130 | messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
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| 131 | OBJ_nid2obj
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| 132 | (NID_pkcs9_messageDigest),
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| 133 | -3, V_ASN1_OCTET_STRING);
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| 134 | if (!messageDigest) {
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| 135 | CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
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| 136 | CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
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| 137 | return 0;
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| 138 | }
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| 139 |
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| 140 | if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
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| 141 | V_ASN1_OCTET_STRING,
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| 142 | messageDigest, -1))
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| 143 | return 1;
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| 144 | else
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| 145 | return 0;
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| 146 | }
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| 147 | CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
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| 148 | return 0;
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| 149 | }
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| 150 |
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| 151 | int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
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| 152 | {
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| 153 | switch (type) {
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| 154 | case CMS_SIGNERINFO_ISSUER_SERIAL:
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| 155 | if (!cms_set1_ias(&sid->d.issuerAndSerialNumber, cert))
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| 156 | return 0;
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| 157 | break;
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| 158 |
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| 159 | case CMS_SIGNERINFO_KEYIDENTIFIER:
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| 160 | if (!cms_set1_keyid(&sid->d.subjectKeyIdentifier, cert))
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| 161 | return 0;
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| 162 | break;
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| 163 |
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| 164 | default:
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| 165 | CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
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| 166 | return 0;
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| 167 | }
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| 168 |
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| 169 | sid->type = type;
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| 170 |
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| 171 | return 1;
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| 172 | }
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| 173 |
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| 174 | int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
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| 175 | ASN1_OCTET_STRING **keyid,
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| 176 | X509_NAME **issuer,
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| 177 | ASN1_INTEGER **sno)
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| 178 | {
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| 179 | if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) {
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| 180 | if (issuer)
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| 181 | *issuer = sid->d.issuerAndSerialNumber->issuer;
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| 182 | if (sno)
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| 183 | *sno = sid->d.issuerAndSerialNumber->serialNumber;
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| 184 | } else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
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| 185 | if (keyid)
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| 186 | *keyid = sid->d.subjectKeyIdentifier;
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| 187 | } else
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| 188 | return 0;
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| 189 | return 1;
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| 190 | }
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| 191 |
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| 192 | int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
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| 193 | {
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| 194 | if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
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| 195 | return cms_ias_cert_cmp(sid->d.issuerAndSerialNumber, cert);
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| 196 | else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
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| 197 | return cms_keyid_cert_cmp(sid->d.subjectKeyIdentifier, cert);
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| 198 | else
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| 199 | return -1;
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| 200 | }
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| 201 |
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| 202 | static int cms_sd_asn1_ctrl(CMS_SignerInfo *si, int cmd)
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| 203 | {
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| 204 | EVP_PKEY *pkey = si->pkey;
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| 205 | int i;
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| 206 | if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
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| 207 | return 1;
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| 208 | i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_SIGN, cmd, si);
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| 209 | if (i == -2) {
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| 210 | CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
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| 211 | return 0;
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| 212 | }
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| 213 | if (i <= 0) {
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| 214 | CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_CTRL_FAILURE);
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| 215 | return 0;
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| 216 | }
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| 217 | return 1;
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| 218 | }
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| 219 |
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| 220 | CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
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| 221 | X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
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| 222 | unsigned int flags)
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| 223 | {
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| 224 | CMS_SignedData *sd;
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| 225 | CMS_SignerInfo *si = NULL;
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| 226 | X509_ALGOR *alg;
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| 227 | int i, type;
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| 228 | if (!X509_check_private_key(signer, pk)) {
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| 229 | CMSerr(CMS_F_CMS_ADD1_SIGNER,
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| 230 | CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
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| 231 | return NULL;
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| 232 | }
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| 233 | sd = cms_signed_data_init(cms);
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| 234 | if (!sd)
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| 235 | goto err;
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| 236 | si = M_ASN1_new_of(CMS_SignerInfo);
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| 237 | if (!si)
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| 238 | goto merr;
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| 239 | /* Call for side-effect of computing hash and caching extensions */
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| 240 | X509_check_purpose(signer, -1, -1);
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| 241 |
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| 242 | X509_up_ref(signer);
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| 243 | EVP_PKEY_up_ref(pk);
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| 244 |
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| 245 | si->pkey = pk;
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| 246 | si->signer = signer;
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| 247 | si->mctx = EVP_MD_CTX_new();
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| 248 | si->pctx = NULL;
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| 249 |
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| 250 | if (si->mctx == NULL) {
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| 251 | CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
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| 252 | goto err;
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| 253 | }
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| 254 |
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| 255 | if (flags & CMS_USE_KEYID) {
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| 256 | si->version = 3;
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| 257 | if (sd->version < 3)
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| 258 | sd->version = 3;
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| 259 | type = CMS_SIGNERINFO_KEYIDENTIFIER;
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| 260 | } else {
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| 261 | type = CMS_SIGNERINFO_ISSUER_SERIAL;
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| 262 | si->version = 1;
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| 263 | }
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| 264 |
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| 265 | if (!cms_set1_SignerIdentifier(si->sid, signer, type))
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| 266 | goto err;
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| 267 |
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| 268 | if (md == NULL) {
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| 269 | int def_nid;
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| 270 | if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0)
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| 271 | goto err;
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| 272 | md = EVP_get_digestbynid(def_nid);
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| 273 | if (md == NULL) {
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| 274 | CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST);
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| 275 | goto err;
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| 276 | }
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| 277 | }
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| 278 |
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| 279 | if (!md) {
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| 280 | CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET);
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| 281 | goto err;
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| 282 | }
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| 283 |
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| 284 | X509_ALGOR_set_md(si->digestAlgorithm, md);
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| 285 |
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| 286 | /* See if digest is present in digestAlgorithms */
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| 287 | for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
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| 288 | const ASN1_OBJECT *aoid;
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| 289 | alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
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| 290 | X509_ALGOR_get0(&aoid, NULL, NULL, alg);
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| 291 | if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
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| 292 | break;
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| 293 | }
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| 294 |
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| 295 | if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) {
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| 296 | alg = X509_ALGOR_new();
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| 297 | if (alg == NULL)
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| 298 | goto merr;
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| 299 | X509_ALGOR_set_md(alg, md);
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| 300 | if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) {
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| 301 | X509_ALGOR_free(alg);
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| 302 | goto merr;
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| 303 | }
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| 304 | }
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| 305 |
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| 306 | if (!(flags & CMS_KEY_PARAM) && !cms_sd_asn1_ctrl(si, 0))
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| 307 | goto err;
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| 308 | if (!(flags & CMS_NOATTR)) {
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| 309 | /*
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| 310 | * Initialize signed attributes structure so other attributes
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| 311 | * such as signing time etc are added later even if we add none here.
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| 312 | */
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| 313 | if (!si->signedAttrs) {
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| 314 | si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
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| 315 | if (!si->signedAttrs)
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| 316 | goto merr;
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| 317 | }
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| 318 |
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| 319 | if (!(flags & CMS_NOSMIMECAP)) {
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| 320 | STACK_OF(X509_ALGOR) *smcap = NULL;
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| 321 | i = CMS_add_standard_smimecap(&smcap);
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| 322 | if (i)
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| 323 | i = CMS_add_smimecap(si, smcap);
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| 324 | sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
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| 325 | if (!i)
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| 326 | goto merr;
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| 327 | }
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| 328 | if (flags & CMS_REUSE_DIGEST) {
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| 329 | if (!cms_copy_messageDigest(cms, si))
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| 330 | goto err;
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| 331 | if (!(flags & (CMS_PARTIAL | CMS_KEY_PARAM)) &&
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| 332 | !CMS_SignerInfo_sign(si))
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| 333 | goto err;
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| 334 | }
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| 335 | }
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| 336 |
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| 337 | if (!(flags & CMS_NOCERTS)) {
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| 338 | /* NB ignore -1 return for duplicate cert */
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| 339 | if (!CMS_add1_cert(cms, signer))
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| 340 | goto merr;
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| 341 | }
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| 342 |
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| 343 | if (flags & CMS_KEY_PARAM) {
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| 344 | if (flags & CMS_NOATTR) {
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| 345 | si->pctx = EVP_PKEY_CTX_new(si->pkey, NULL);
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| 346 | if (si->pctx == NULL)
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| 347 | goto err;
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| 348 | if (EVP_PKEY_sign_init(si->pctx) <= 0)
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| 349 | goto err;
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| 350 | if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0)
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| 351 | goto err;
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| 352 | } else if (EVP_DigestSignInit(si->mctx, &si->pctx, md, NULL, pk) <=
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| 353 | 0)
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| 354 | goto err;
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| 355 | }
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| 356 |
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| 357 | if (!sd->signerInfos)
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| 358 | sd->signerInfos = sk_CMS_SignerInfo_new_null();
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| 359 | if (!sd->signerInfos || !sk_CMS_SignerInfo_push(sd->signerInfos, si))
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| 360 | goto merr;
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| 361 |
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| 362 | return si;
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| 363 |
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| 364 | merr:
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| 365 | CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
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| 366 | err:
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| 367 | M_ASN1_free_of(si, CMS_SignerInfo);
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| 368 | return NULL;
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| 369 |
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| 370 | }
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| 371 |
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| 372 | static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
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| 373 | {
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| 374 | ASN1_TIME *tt;
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| 375 | int r = 0;
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| 376 | if (t)
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| 377 | tt = t;
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| 378 | else
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| 379 | tt = X509_gmtime_adj(NULL, 0);
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| 380 |
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| 381 | if (!tt)
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| 382 | goto merr;
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| 383 |
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| 384 | if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
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| 385 | tt->type, tt, -1) <= 0)
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| 386 | goto merr;
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| 387 |
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| 388 | r = 1;
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| 389 |
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| 390 | merr:
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| 391 |
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| 392 | if (!t)
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| 393 | ASN1_TIME_free(tt);
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| 394 |
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| 395 | if (!r)
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| 396 | CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
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| 397 |
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| 398 | return r;
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| 399 |
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| 400 | }
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| 401 |
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| 402 | EVP_PKEY_CTX *CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo *si)
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| 403 | {
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| 404 | return si->pctx;
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| 405 | }
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| 406 |
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| 407 | EVP_MD_CTX *CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo *si)
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| 408 | {
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| 409 | return si->mctx;
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| 410 | }
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| 411 |
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| 412 | STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
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| 413 | {
|
---|
| 414 | CMS_SignedData *sd;
|
---|
| 415 | sd = cms_get0_signed(cms);
|
---|
| 416 | if (!sd)
|
---|
| 417 | return NULL;
|
---|
| 418 | return sd->signerInfos;
|
---|
| 419 | }
|
---|
| 420 |
|
---|
| 421 | STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
|
---|
| 422 | {
|
---|
| 423 | STACK_OF(X509) *signers = NULL;
|
---|
| 424 | STACK_OF(CMS_SignerInfo) *sinfos;
|
---|
| 425 | CMS_SignerInfo *si;
|
---|
| 426 | int i;
|
---|
| 427 | sinfos = CMS_get0_SignerInfos(cms);
|
---|
| 428 | for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
|
---|
| 429 | si = sk_CMS_SignerInfo_value(sinfos, i);
|
---|
| 430 | if (si->signer) {
|
---|
| 431 | if (!signers) {
|
---|
| 432 | signers = sk_X509_new_null();
|
---|
| 433 | if (!signers)
|
---|
| 434 | return NULL;
|
---|
| 435 | }
|
---|
| 436 | if (!sk_X509_push(signers, si->signer)) {
|
---|
| 437 | sk_X509_free(signers);
|
---|
| 438 | return NULL;
|
---|
| 439 | }
|
---|
| 440 | }
|
---|
| 441 | }
|
---|
| 442 | return signers;
|
---|
| 443 | }
|
---|
| 444 |
|
---|
| 445 | void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
|
---|
| 446 | {
|
---|
| 447 | if (signer) {
|
---|
| 448 | X509_up_ref(signer);
|
---|
| 449 | EVP_PKEY_free(si->pkey);
|
---|
| 450 | si->pkey = X509_get_pubkey(signer);
|
---|
| 451 | }
|
---|
| 452 | X509_free(si->signer);
|
---|
| 453 | si->signer = signer;
|
---|
| 454 | }
|
---|
| 455 |
|
---|
| 456 | int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
|
---|
| 457 | ASN1_OCTET_STRING **keyid,
|
---|
| 458 | X509_NAME **issuer, ASN1_INTEGER **sno)
|
---|
| 459 | {
|
---|
| 460 | return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
|
---|
| 461 | }
|
---|
| 462 |
|
---|
| 463 | int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
|
---|
| 464 | {
|
---|
| 465 | return cms_SignerIdentifier_cert_cmp(si->sid, cert);
|
---|
| 466 | }
|
---|
| 467 |
|
---|
| 468 | int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
|
---|
| 469 | unsigned int flags)
|
---|
| 470 | {
|
---|
| 471 | CMS_SignedData *sd;
|
---|
| 472 | CMS_SignerInfo *si;
|
---|
| 473 | CMS_CertificateChoices *cch;
|
---|
| 474 | STACK_OF(CMS_CertificateChoices) *certs;
|
---|
| 475 | X509 *x;
|
---|
| 476 | int i, j;
|
---|
| 477 | int ret = 0;
|
---|
| 478 | sd = cms_get0_signed(cms);
|
---|
| 479 | if (!sd)
|
---|
| 480 | return -1;
|
---|
| 481 | certs = sd->certificates;
|
---|
| 482 | for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
|
---|
| 483 | si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
|
---|
| 484 | if (si->signer)
|
---|
| 485 | continue;
|
---|
| 486 |
|
---|
| 487 | for (j = 0; j < sk_X509_num(scerts); j++) {
|
---|
| 488 | x = sk_X509_value(scerts, j);
|
---|
| 489 | if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
|
---|
| 490 | CMS_SignerInfo_set1_signer_cert(si, x);
|
---|
| 491 | ret++;
|
---|
| 492 | break;
|
---|
| 493 | }
|
---|
| 494 | }
|
---|
| 495 |
|
---|
| 496 | if (si->signer || (flags & CMS_NOINTERN))
|
---|
| 497 | continue;
|
---|
| 498 |
|
---|
| 499 | for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) {
|
---|
| 500 | cch = sk_CMS_CertificateChoices_value(certs, j);
|
---|
| 501 | if (cch->type != 0)
|
---|
| 502 | continue;
|
---|
| 503 | x = cch->d.certificate;
|
---|
| 504 | if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
|
---|
| 505 | CMS_SignerInfo_set1_signer_cert(si, x);
|
---|
| 506 | ret++;
|
---|
| 507 | break;
|
---|
| 508 | }
|
---|
| 509 | }
|
---|
| 510 | }
|
---|
| 511 | return ret;
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk,
|
---|
| 515 | X509 **signer, X509_ALGOR **pdig,
|
---|
| 516 | X509_ALGOR **psig)
|
---|
| 517 | {
|
---|
| 518 | if (pk)
|
---|
| 519 | *pk = si->pkey;
|
---|
| 520 | if (signer)
|
---|
| 521 | *signer = si->signer;
|
---|
| 522 | if (pdig)
|
---|
| 523 | *pdig = si->digestAlgorithm;
|
---|
| 524 | if (psig)
|
---|
| 525 | *psig = si->signatureAlgorithm;
|
---|
| 526 | }
|
---|
| 527 |
|
---|
| 528 | ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si)
|
---|
| 529 | {
|
---|
| 530 | return si->signature;
|
---|
| 531 | }
|
---|
| 532 |
|
---|
| 533 | static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
|
---|
| 534 | CMS_SignerInfo *si, BIO *chain)
|
---|
| 535 | {
|
---|
| 536 | EVP_MD_CTX *mctx = EVP_MD_CTX_new();
|
---|
| 537 | int r = 0;
|
---|
| 538 | EVP_PKEY_CTX *pctx = NULL;
|
---|
| 539 |
|
---|
| 540 | if (mctx == NULL) {
|
---|
| 541 | CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
|
---|
| 542 | return 0;
|
---|
| 543 | }
|
---|
| 544 |
|
---|
| 545 | if (!si->pkey) {
|
---|
| 546 | CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
|
---|
| 547 | goto err;
|
---|
| 548 | }
|
---|
| 549 |
|
---|
| 550 | if (!cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm))
|
---|
| 551 | goto err;
|
---|
| 552 | /* Set SignerInfo algorithm details if we used custom parameter */
|
---|
| 553 | if (si->pctx && !cms_sd_asn1_ctrl(si, 0))
|
---|
| 554 | goto err;
|
---|
| 555 |
|
---|
| 556 | /*
|
---|
| 557 | * If any signed attributes calculate and add messageDigest attribute
|
---|
| 558 | */
|
---|
| 559 |
|
---|
| 560 | if (CMS_signed_get_attr_count(si) >= 0) {
|
---|
| 561 | ASN1_OBJECT *ctype =
|
---|
| 562 | cms->d.signedData->encapContentInfo->eContentType;
|
---|
| 563 | unsigned char md[EVP_MAX_MD_SIZE];
|
---|
| 564 | unsigned int mdlen;
|
---|
| 565 | if (!EVP_DigestFinal_ex(mctx, md, &mdlen))
|
---|
| 566 | goto err;
|
---|
| 567 | if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
|
---|
| 568 | V_ASN1_OCTET_STRING, md, mdlen))
|
---|
| 569 | goto err;
|
---|
| 570 | /* Copy content type across */
|
---|
| 571 | if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
|
---|
| 572 | V_ASN1_OBJECT, ctype, -1) <= 0)
|
---|
| 573 | goto err;
|
---|
| 574 | if (!CMS_SignerInfo_sign(si))
|
---|
| 575 | goto err;
|
---|
| 576 | } else if (si->pctx) {
|
---|
| 577 | unsigned char *sig;
|
---|
| 578 | size_t siglen;
|
---|
| 579 | unsigned char md[EVP_MAX_MD_SIZE];
|
---|
| 580 | unsigned int mdlen;
|
---|
| 581 | pctx = si->pctx;
|
---|
| 582 | if (!EVP_DigestFinal_ex(mctx, md, &mdlen))
|
---|
| 583 | goto err;
|
---|
| 584 | siglen = EVP_PKEY_size(si->pkey);
|
---|
| 585 | sig = OPENSSL_malloc(siglen);
|
---|
| 586 | if (sig == NULL) {
|
---|
| 587 | CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
|
---|
| 588 | goto err;
|
---|
| 589 | }
|
---|
| 590 | if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0) {
|
---|
| 591 | OPENSSL_free(sig);
|
---|
| 592 | goto err;
|
---|
| 593 | }
|
---|
| 594 | ASN1_STRING_set0(si->signature, sig, siglen);
|
---|
| 595 | } else {
|
---|
| 596 | unsigned char *sig;
|
---|
| 597 | unsigned int siglen;
|
---|
| 598 | sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
|
---|
| 599 | if (sig == NULL) {
|
---|
| 600 | CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
|
---|
| 601 | goto err;
|
---|
| 602 | }
|
---|
| 603 | if (!EVP_SignFinal(mctx, sig, &siglen, si->pkey)) {
|
---|
| 604 | CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_SIGNFINAL_ERROR);
|
---|
| 605 | OPENSSL_free(sig);
|
---|
| 606 | goto err;
|
---|
| 607 | }
|
---|
| 608 | ASN1_STRING_set0(si->signature, sig, siglen);
|
---|
| 609 | }
|
---|
| 610 |
|
---|
| 611 | r = 1;
|
---|
| 612 |
|
---|
| 613 | err:
|
---|
| 614 | EVP_MD_CTX_free(mctx);
|
---|
| 615 | EVP_PKEY_CTX_free(pctx);
|
---|
| 616 | return r;
|
---|
| 617 |
|
---|
| 618 | }
|
---|
| 619 |
|
---|
| 620 | int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
|
---|
| 621 | {
|
---|
| 622 | STACK_OF(CMS_SignerInfo) *sinfos;
|
---|
| 623 | CMS_SignerInfo *si;
|
---|
| 624 | int i;
|
---|
| 625 | sinfos = CMS_get0_SignerInfos(cms);
|
---|
| 626 | for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
|
---|
| 627 | si = sk_CMS_SignerInfo_value(sinfos, i);
|
---|
| 628 | if (!cms_SignerInfo_content_sign(cms, si, chain))
|
---|
| 629 | return 0;
|
---|
| 630 | }
|
---|
| 631 | cms->d.signedData->encapContentInfo->partial = 0;
|
---|
| 632 | return 1;
|
---|
| 633 | }
|
---|
| 634 |
|
---|
| 635 | int CMS_SignerInfo_sign(CMS_SignerInfo *si)
|
---|
| 636 | {
|
---|
| 637 | EVP_MD_CTX *mctx = si->mctx;
|
---|
| 638 | EVP_PKEY_CTX *pctx;
|
---|
| 639 | unsigned char *abuf = NULL;
|
---|
| 640 | int alen;
|
---|
| 641 | size_t siglen;
|
---|
| 642 | const EVP_MD *md = NULL;
|
---|
| 643 |
|
---|
| 644 | md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
|
---|
| 645 | if (md == NULL)
|
---|
| 646 | return 0;
|
---|
| 647 |
|
---|
| 648 | if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) {
|
---|
| 649 | if (!cms_add1_signingTime(si, NULL))
|
---|
| 650 | goto err;
|
---|
| 651 | }
|
---|
| 652 |
|
---|
| 653 | if (si->pctx)
|
---|
| 654 | pctx = si->pctx;
|
---|
| 655 | else {
|
---|
| 656 | EVP_MD_CTX_reset(mctx);
|
---|
| 657 | if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
|
---|
| 658 | goto err;
|
---|
| 659 | }
|
---|
| 660 |
|
---|
| 661 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
|
---|
| 662 | EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0) {
|
---|
| 663 | CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
|
---|
| 664 | goto err;
|
---|
| 665 | }
|
---|
| 666 |
|
---|
| 667 | alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
|
---|
| 668 | ASN1_ITEM_rptr(CMS_Attributes_Sign));
|
---|
| 669 | if (!abuf)
|
---|
| 670 | goto err;
|
---|
| 671 | if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
|
---|
| 672 | goto err;
|
---|
| 673 | if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
|
---|
| 674 | goto err;
|
---|
| 675 | OPENSSL_free(abuf);
|
---|
| 676 | abuf = OPENSSL_malloc(siglen);
|
---|
| 677 | if (abuf == NULL)
|
---|
| 678 | goto err;
|
---|
| 679 | if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
|
---|
| 680 | goto err;
|
---|
| 681 |
|
---|
| 682 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
|
---|
| 683 | EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0) {
|
---|
| 684 | CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
|
---|
| 685 | goto err;
|
---|
| 686 | }
|
---|
| 687 |
|
---|
| 688 | EVP_MD_CTX_reset(mctx);
|
---|
| 689 |
|
---|
| 690 | ASN1_STRING_set0(si->signature, abuf, siglen);
|
---|
| 691 |
|
---|
| 692 | return 1;
|
---|
| 693 |
|
---|
| 694 | err:
|
---|
| 695 | OPENSSL_free(abuf);
|
---|
| 696 | EVP_MD_CTX_reset(mctx);
|
---|
| 697 | return 0;
|
---|
| 698 |
|
---|
| 699 | }
|
---|
| 700 |
|
---|
| 701 | int CMS_SignerInfo_verify(CMS_SignerInfo *si)
|
---|
| 702 | {
|
---|
| 703 | EVP_MD_CTX *mctx = NULL;
|
---|
| 704 | unsigned char *abuf = NULL;
|
---|
| 705 | int alen, r = -1;
|
---|
| 706 | const EVP_MD *md = NULL;
|
---|
| 707 |
|
---|
| 708 | if (!si->pkey) {
|
---|
| 709 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
|
---|
| 710 | return -1;
|
---|
| 711 | }
|
---|
| 712 |
|
---|
| 713 | md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
|
---|
| 714 | if (md == NULL)
|
---|
| 715 | return -1;
|
---|
| 716 | if (si->mctx == NULL)
|
---|
| 717 | si->mctx = EVP_MD_CTX_new();
|
---|
| 718 | mctx = si->mctx;
|
---|
| 719 | if (EVP_DigestVerifyInit(mctx, &si->pctx, md, NULL, si->pkey) <= 0)
|
---|
| 720 | goto err;
|
---|
| 721 |
|
---|
| 722 | if (!cms_sd_asn1_ctrl(si, 1))
|
---|
| 723 | goto err;
|
---|
| 724 |
|
---|
| 725 | alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
|
---|
| 726 | ASN1_ITEM_rptr(CMS_Attributes_Verify));
|
---|
| 727 | if (!abuf)
|
---|
| 728 | goto err;
|
---|
| 729 | r = EVP_DigestVerifyUpdate(mctx, abuf, alen);
|
---|
| 730 | OPENSSL_free(abuf);
|
---|
| 731 | if (r <= 0) {
|
---|
| 732 | r = -1;
|
---|
| 733 | goto err;
|
---|
| 734 | }
|
---|
| 735 | r = EVP_DigestVerifyFinal(mctx,
|
---|
| 736 | si->signature->data, si->signature->length);
|
---|
| 737 | if (r <= 0)
|
---|
| 738 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
|
---|
| 739 | err:
|
---|
| 740 | EVP_MD_CTX_reset(mctx);
|
---|
| 741 | return r;
|
---|
| 742 | }
|
---|
| 743 |
|
---|
| 744 | /* Create a chain of digest BIOs from a CMS ContentInfo */
|
---|
| 745 |
|
---|
| 746 | BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
|
---|
| 747 | {
|
---|
| 748 | int i;
|
---|
| 749 | CMS_SignedData *sd;
|
---|
| 750 | BIO *chain = NULL;
|
---|
| 751 | sd = cms_get0_signed(cms);
|
---|
| 752 | if (!sd)
|
---|
| 753 | return NULL;
|
---|
| 754 | if (cms->d.signedData->encapContentInfo->partial)
|
---|
| 755 | cms_sd_set_version(sd);
|
---|
| 756 | for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
|
---|
| 757 | X509_ALGOR *digestAlgorithm;
|
---|
| 758 | BIO *mdbio;
|
---|
| 759 | digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
|
---|
| 760 | mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
|
---|
| 761 | if (!mdbio)
|
---|
| 762 | goto err;
|
---|
| 763 | if (chain)
|
---|
| 764 | BIO_push(chain, mdbio);
|
---|
| 765 | else
|
---|
| 766 | chain = mdbio;
|
---|
| 767 | }
|
---|
| 768 | return chain;
|
---|
| 769 | err:
|
---|
| 770 | BIO_free_all(chain);
|
---|
| 771 | return NULL;
|
---|
| 772 | }
|
---|
| 773 |
|
---|
| 774 | int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
|
---|
| 775 | {
|
---|
| 776 | ASN1_OCTET_STRING *os = NULL;
|
---|
| 777 | EVP_MD_CTX *mctx = EVP_MD_CTX_new();
|
---|
| 778 | EVP_PKEY_CTX *pkctx = NULL;
|
---|
| 779 | int r = -1;
|
---|
| 780 | unsigned char mval[EVP_MAX_MD_SIZE];
|
---|
| 781 | unsigned int mlen;
|
---|
| 782 |
|
---|
| 783 | if (mctx == NULL) {
|
---|
| 784 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, ERR_R_MALLOC_FAILURE);
|
---|
| 785 | goto err;
|
---|
| 786 | }
|
---|
| 787 | /* If we have any signed attributes look for messageDigest value */
|
---|
| 788 | if (CMS_signed_get_attr_count(si) >= 0) {
|
---|
| 789 | os = CMS_signed_get0_data_by_OBJ(si,
|
---|
| 790 | OBJ_nid2obj(NID_pkcs9_messageDigest),
|
---|
| 791 | -3, V_ASN1_OCTET_STRING);
|
---|
| 792 | if (!os) {
|
---|
| 793 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
---|
| 794 | CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
|
---|
| 795 | goto err;
|
---|
| 796 | }
|
---|
| 797 | }
|
---|
| 798 |
|
---|
| 799 | if (!cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm))
|
---|
| 800 | goto err;
|
---|
| 801 |
|
---|
| 802 | if (EVP_DigestFinal_ex(mctx, mval, &mlen) <= 0) {
|
---|
| 803 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
---|
| 804 | CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
|
---|
| 805 | goto err;
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 | /* If messageDigest found compare it */
|
---|
| 809 |
|
---|
| 810 | if (os) {
|
---|
| 811 | if (mlen != (unsigned int)os->length) {
|
---|
| 812 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
---|
| 813 | CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
|
---|
| 814 | goto err;
|
---|
| 815 | }
|
---|
| 816 |
|
---|
| 817 | if (memcmp(mval, os->data, mlen)) {
|
---|
| 818 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
---|
| 819 | CMS_R_VERIFICATION_FAILURE);
|
---|
| 820 | r = 0;
|
---|
| 821 | } else
|
---|
| 822 | r = 1;
|
---|
| 823 | } else {
|
---|
| 824 | const EVP_MD *md = EVP_MD_CTX_md(mctx);
|
---|
| 825 | pkctx = EVP_PKEY_CTX_new(si->pkey, NULL);
|
---|
| 826 | if (pkctx == NULL)
|
---|
| 827 | goto err;
|
---|
| 828 | if (EVP_PKEY_verify_init(pkctx) <= 0)
|
---|
| 829 | goto err;
|
---|
| 830 | if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0)
|
---|
| 831 | goto err;
|
---|
| 832 | si->pctx = pkctx;
|
---|
| 833 | if (!cms_sd_asn1_ctrl(si, 1))
|
---|
| 834 | goto err;
|
---|
| 835 | r = EVP_PKEY_verify(pkctx, si->signature->data,
|
---|
| 836 | si->signature->length, mval, mlen);
|
---|
| 837 | if (r <= 0) {
|
---|
| 838 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
|
---|
| 839 | CMS_R_VERIFICATION_FAILURE);
|
---|
| 840 | r = 0;
|
---|
| 841 | }
|
---|
| 842 | }
|
---|
| 843 |
|
---|
| 844 | err:
|
---|
| 845 | EVP_PKEY_CTX_free(pkctx);
|
---|
| 846 | EVP_MD_CTX_free(mctx);
|
---|
| 847 | return r;
|
---|
| 848 |
|
---|
| 849 | }
|
---|
| 850 |
|
---|
| 851 | int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
|
---|
| 852 | {
|
---|
| 853 | unsigned char *smder = NULL;
|
---|
| 854 | int smderlen, r;
|
---|
| 855 | smderlen = i2d_X509_ALGORS(algs, &smder);
|
---|
| 856 | if (smderlen <= 0)
|
---|
| 857 | return 0;
|
---|
| 858 | r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
|
---|
| 859 | V_ASN1_SEQUENCE, smder, smderlen);
|
---|
| 860 | OPENSSL_free(smder);
|
---|
| 861 | return r;
|
---|
| 862 | }
|
---|
| 863 |
|
---|
| 864 | int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
|
---|
| 865 | int algnid, int keysize)
|
---|
| 866 | {
|
---|
| 867 | X509_ALGOR *alg;
|
---|
| 868 | ASN1_INTEGER *key = NULL;
|
---|
| 869 | if (keysize > 0) {
|
---|
| 870 | key = ASN1_INTEGER_new();
|
---|
| 871 | if (key == NULL || !ASN1_INTEGER_set(key, keysize))
|
---|
| 872 | return 0;
|
---|
| 873 | }
|
---|
| 874 | alg = X509_ALGOR_new();
|
---|
| 875 | if (alg == NULL) {
|
---|
| 876 | ASN1_INTEGER_free(key);
|
---|
| 877 | return 0;
|
---|
| 878 | }
|
---|
| 879 |
|
---|
| 880 | X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
|
---|
| 881 | key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
|
---|
| 882 | if (*algs == NULL)
|
---|
| 883 | *algs = sk_X509_ALGOR_new_null();
|
---|
| 884 | if (*algs == NULL || !sk_X509_ALGOR_push(*algs, alg)) {
|
---|
| 885 | X509_ALGOR_free(alg);
|
---|
| 886 | return 0;
|
---|
| 887 | }
|
---|
| 888 | return 1;
|
---|
| 889 | }
|
---|
| 890 |
|
---|
| 891 | /* Check to see if a cipher exists and if so add S/MIME capabilities */
|
---|
| 892 |
|
---|
| 893 | static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
|
---|
| 894 | {
|
---|
| 895 | if (EVP_get_cipherbynid(nid))
|
---|
| 896 | return CMS_add_simple_smimecap(sk, nid, arg);
|
---|
| 897 | return 1;
|
---|
| 898 | }
|
---|
| 899 |
|
---|
| 900 | static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
|
---|
| 901 | {
|
---|
| 902 | if (EVP_get_digestbynid(nid))
|
---|
| 903 | return CMS_add_simple_smimecap(sk, nid, arg);
|
---|
| 904 | return 1;
|
---|
| 905 | }
|
---|
| 906 |
|
---|
| 907 | int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
|
---|
| 908 | {
|
---|
| 909 | if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
|
---|
| 910 | || !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
|
---|
| 911 | || !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
|
---|
| 912 | || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
|
---|
| 913 | || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
|
---|
| 914 | || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
|
---|
| 915 | || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
|
---|
| 916 | || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
|
---|
| 917 | || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
|
---|
| 918 | || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
|
---|
| 919 | || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
|
---|
| 920 | || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
|
---|
| 921 | return 0;
|
---|
| 922 | return 1;
|
---|
| 923 | }
|
---|