/* * Copyright 2008-2023 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include #include #include #include #include "cms_local.h" ASN1_SEQUENCE(CMS_IssuerAndSerialNumber) = { ASN1_SIMPLE(CMS_IssuerAndSerialNumber, issuer, X509_NAME), ASN1_SIMPLE(CMS_IssuerAndSerialNumber, serialNumber, ASN1_INTEGER) } ASN1_SEQUENCE_END(CMS_IssuerAndSerialNumber) ASN1_SEQUENCE(CMS_OtherCertificateFormat) = { ASN1_SIMPLE(CMS_OtherCertificateFormat, otherCertFormat, ASN1_OBJECT), ASN1_OPT(CMS_OtherCertificateFormat, otherCert, ASN1_ANY) } static_ASN1_SEQUENCE_END(CMS_OtherCertificateFormat) ASN1_CHOICE(CMS_CertificateChoices) = { ASN1_SIMPLE(CMS_CertificateChoices, d.certificate, X509), ASN1_IMP(CMS_CertificateChoices, d.extendedCertificate, ASN1_SEQUENCE, 0), ASN1_IMP(CMS_CertificateChoices, d.v1AttrCert, ASN1_SEQUENCE, 1), ASN1_IMP(CMS_CertificateChoices, d.v2AttrCert, ASN1_SEQUENCE, 2), ASN1_IMP(CMS_CertificateChoices, d.other, CMS_OtherCertificateFormat, 3) } ASN1_CHOICE_END(CMS_CertificateChoices) ASN1_CHOICE(CMS_SignerIdentifier) = { ASN1_SIMPLE(CMS_SignerIdentifier, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber), ASN1_IMP(CMS_SignerIdentifier, d.subjectKeyIdentifier, ASN1_OCTET_STRING, 0) } static_ASN1_CHOICE_END(CMS_SignerIdentifier) ASN1_NDEF_SEQUENCE(CMS_EncapsulatedContentInfo) = { ASN1_SIMPLE(CMS_EncapsulatedContentInfo, eContentType, ASN1_OBJECT), ASN1_NDEF_EXP_OPT(CMS_EncapsulatedContentInfo, eContent, ASN1_OCTET_STRING_NDEF, 0) } static_ASN1_NDEF_SEQUENCE_END(CMS_EncapsulatedContentInfo) /* Minor tweak to operation: free up signer key, cert */ static int cms_si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { if (operation == ASN1_OP_FREE_POST) { CMS_SignerInfo *si = (CMS_SignerInfo *)*pval; EVP_PKEY_free(si->pkey); X509_free(si->signer); EVP_MD_CTX_free(si->mctx); EVP_PKEY_CTX_free(si->pctx); } return 1; } ASN1_SEQUENCE_cb(CMS_SignerInfo, cms_si_cb) = { ASN1_EMBED(CMS_SignerInfo, version, INT32), ASN1_SIMPLE(CMS_SignerInfo, sid, CMS_SignerIdentifier), ASN1_SIMPLE(CMS_SignerInfo, digestAlgorithm, X509_ALGOR), ASN1_IMP_SET_OF_OPT(CMS_SignerInfo, signedAttrs, X509_ATTRIBUTE, 0), ASN1_SIMPLE(CMS_SignerInfo, signatureAlgorithm, X509_ALGOR), ASN1_SIMPLE(CMS_SignerInfo, signature, ASN1_OCTET_STRING), ASN1_IMP_SET_OF_OPT(CMS_SignerInfo, unsignedAttrs, X509_ATTRIBUTE, 1) } ASN1_SEQUENCE_END_cb(CMS_SignerInfo, CMS_SignerInfo) ASN1_SEQUENCE(CMS_OtherRevocationInfoFormat) = { ASN1_SIMPLE(CMS_OtherRevocationInfoFormat, otherRevInfoFormat, ASN1_OBJECT), ASN1_OPT(CMS_OtherRevocationInfoFormat, otherRevInfo, ASN1_ANY) } static_ASN1_SEQUENCE_END(CMS_OtherRevocationInfoFormat) ASN1_CHOICE(CMS_RevocationInfoChoice) = { ASN1_SIMPLE(CMS_RevocationInfoChoice, d.crl, X509_CRL), ASN1_IMP(CMS_RevocationInfoChoice, d.other, CMS_OtherRevocationInfoFormat, 1) } ASN1_CHOICE_END(CMS_RevocationInfoChoice) ASN1_NDEF_SEQUENCE(CMS_SignedData) = { ASN1_EMBED(CMS_SignedData, version, INT32), ASN1_SET_OF(CMS_SignedData, digestAlgorithms, X509_ALGOR), ASN1_SIMPLE(CMS_SignedData, encapContentInfo, CMS_EncapsulatedContentInfo), ASN1_IMP_SET_OF_OPT(CMS_SignedData, certificates, CMS_CertificateChoices, 0), ASN1_IMP_SET_OF_OPT(CMS_SignedData, crls, CMS_RevocationInfoChoice, 1), ASN1_SET_OF(CMS_SignedData, signerInfos, CMS_SignerInfo) } ASN1_NDEF_SEQUENCE_END(CMS_SignedData) ASN1_SEQUENCE(CMS_OriginatorInfo) = { ASN1_IMP_SET_OF_OPT(CMS_OriginatorInfo, certificates, CMS_CertificateChoices, 0), ASN1_IMP_SET_OF_OPT(CMS_OriginatorInfo, crls, CMS_RevocationInfoChoice, 1) } static_ASN1_SEQUENCE_END(CMS_OriginatorInfo) static int cms_ec_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { CMS_EncryptedContentInfo *ec = (CMS_EncryptedContentInfo *)*pval; if (operation == ASN1_OP_FREE_POST) OPENSSL_clear_free(ec->key, ec->keylen); return 1; } ASN1_NDEF_SEQUENCE_cb(CMS_EncryptedContentInfo, cms_ec_cb) = { ASN1_SIMPLE(CMS_EncryptedContentInfo, contentType, ASN1_OBJECT), ASN1_SIMPLE(CMS_EncryptedContentInfo, contentEncryptionAlgorithm, X509_ALGOR), ASN1_IMP_OPT(CMS_EncryptedContentInfo, encryptedContent, ASN1_OCTET_STRING_NDEF, 0) } ASN1_NDEF_SEQUENCE_END_cb(CMS_EncryptedContentInfo, CMS_EncryptedContentInfo) ASN1_SEQUENCE(CMS_KeyTransRecipientInfo) = { ASN1_EMBED(CMS_KeyTransRecipientInfo, version, INT32), ASN1_SIMPLE(CMS_KeyTransRecipientInfo, rid, CMS_SignerIdentifier), ASN1_SIMPLE(CMS_KeyTransRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR), ASN1_SIMPLE(CMS_KeyTransRecipientInfo, encryptedKey, ASN1_OCTET_STRING) } ASN1_SEQUENCE_END(CMS_KeyTransRecipientInfo) ASN1_SEQUENCE(CMS_OtherKeyAttribute) = { ASN1_SIMPLE(CMS_OtherKeyAttribute, keyAttrId, ASN1_OBJECT), ASN1_OPT(CMS_OtherKeyAttribute, keyAttr, ASN1_ANY) } ASN1_SEQUENCE_END(CMS_OtherKeyAttribute) ASN1_SEQUENCE(CMS_RecipientKeyIdentifier) = { ASN1_SIMPLE(CMS_RecipientKeyIdentifier, subjectKeyIdentifier, ASN1_OCTET_STRING), ASN1_OPT(CMS_RecipientKeyIdentifier, date, ASN1_GENERALIZEDTIME), ASN1_OPT(CMS_RecipientKeyIdentifier, other, CMS_OtherKeyAttribute) } ASN1_SEQUENCE_END(CMS_RecipientKeyIdentifier) ASN1_CHOICE(CMS_KeyAgreeRecipientIdentifier) = { ASN1_SIMPLE(CMS_KeyAgreeRecipientIdentifier, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber), ASN1_IMP(CMS_KeyAgreeRecipientIdentifier, d.rKeyId, CMS_RecipientKeyIdentifier, 0) } static_ASN1_CHOICE_END(CMS_KeyAgreeRecipientIdentifier) static int cms_rek_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { CMS_RecipientEncryptedKey *rek = (CMS_RecipientEncryptedKey *)*pval; if (operation == ASN1_OP_FREE_POST) { EVP_PKEY_free(rek->pkey); } return 1; } ASN1_SEQUENCE_cb(CMS_RecipientEncryptedKey, cms_rek_cb) = { ASN1_SIMPLE(CMS_RecipientEncryptedKey, rid, CMS_KeyAgreeRecipientIdentifier), ASN1_SIMPLE(CMS_RecipientEncryptedKey, encryptedKey, ASN1_OCTET_STRING) } ASN1_SEQUENCE_END_cb(CMS_RecipientEncryptedKey, CMS_RecipientEncryptedKey) ASN1_SEQUENCE(CMS_OriginatorPublicKey) = { ASN1_SIMPLE(CMS_OriginatorPublicKey, algorithm, X509_ALGOR), ASN1_SIMPLE(CMS_OriginatorPublicKey, publicKey, ASN1_BIT_STRING) } ASN1_SEQUENCE_END(CMS_OriginatorPublicKey) ASN1_CHOICE(CMS_OriginatorIdentifierOrKey) = { ASN1_SIMPLE(CMS_OriginatorIdentifierOrKey, d.issuerAndSerialNumber, CMS_IssuerAndSerialNumber), ASN1_IMP(CMS_OriginatorIdentifierOrKey, d.subjectKeyIdentifier, ASN1_OCTET_STRING, 0), ASN1_IMP(CMS_OriginatorIdentifierOrKey, d.originatorKey, CMS_OriginatorPublicKey, 1) } static_ASN1_CHOICE_END(CMS_OriginatorIdentifierOrKey) static int cms_kari_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { CMS_KeyAgreeRecipientInfo *kari = (CMS_KeyAgreeRecipientInfo *)*pval; if (operation == ASN1_OP_NEW_POST) { kari->ctx = EVP_CIPHER_CTX_new(); if (kari->ctx == NULL) return 0; EVP_CIPHER_CTX_set_flags(kari->ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW); kari->pctx = NULL; } else if (operation == ASN1_OP_FREE_POST) { EVP_PKEY_CTX_free(kari->pctx); EVP_CIPHER_CTX_free(kari->ctx); } return 1; } ASN1_SEQUENCE_cb(CMS_KeyAgreeRecipientInfo, cms_kari_cb) = { ASN1_EMBED(CMS_KeyAgreeRecipientInfo, version, INT32), ASN1_EXP(CMS_KeyAgreeRecipientInfo, originator, CMS_OriginatorIdentifierOrKey, 0), ASN1_EXP_OPT(CMS_KeyAgreeRecipientInfo, ukm, ASN1_OCTET_STRING, 1), ASN1_SIMPLE(CMS_KeyAgreeRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR), ASN1_SEQUENCE_OF(CMS_KeyAgreeRecipientInfo, recipientEncryptedKeys, CMS_RecipientEncryptedKey) } ASN1_SEQUENCE_END_cb(CMS_KeyAgreeRecipientInfo, CMS_KeyAgreeRecipientInfo) ASN1_SEQUENCE(CMS_KEKIdentifier) = { ASN1_SIMPLE(CMS_KEKIdentifier, keyIdentifier, ASN1_OCTET_STRING), ASN1_OPT(CMS_KEKIdentifier, date, ASN1_GENERALIZEDTIME), ASN1_OPT(CMS_KEKIdentifier, other, CMS_OtherKeyAttribute) } static_ASN1_SEQUENCE_END(CMS_KEKIdentifier) ASN1_SEQUENCE(CMS_KEKRecipientInfo) = { ASN1_EMBED(CMS_KEKRecipientInfo, version, INT32), ASN1_SIMPLE(CMS_KEKRecipientInfo, kekid, CMS_KEKIdentifier), ASN1_SIMPLE(CMS_KEKRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR), ASN1_SIMPLE(CMS_KEKRecipientInfo, encryptedKey, ASN1_OCTET_STRING) } ASN1_SEQUENCE_END(CMS_KEKRecipientInfo) ASN1_SEQUENCE(CMS_PasswordRecipientInfo) = { ASN1_EMBED(CMS_PasswordRecipientInfo, version, INT32), ASN1_IMP_OPT(CMS_PasswordRecipientInfo, keyDerivationAlgorithm, X509_ALGOR, 0), ASN1_SIMPLE(CMS_PasswordRecipientInfo, keyEncryptionAlgorithm, X509_ALGOR), ASN1_SIMPLE(CMS_PasswordRecipientInfo, encryptedKey, ASN1_OCTET_STRING) } ASN1_SEQUENCE_END(CMS_PasswordRecipientInfo) ASN1_SEQUENCE(CMS_OtherRecipientInfo) = { ASN1_SIMPLE(CMS_OtherRecipientInfo, oriType, ASN1_OBJECT), ASN1_OPT(CMS_OtherRecipientInfo, oriValue, ASN1_ANY) } static_ASN1_SEQUENCE_END(CMS_OtherRecipientInfo) /* Free up RecipientInfo additional data */ static int cms_ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { if (operation == ASN1_OP_FREE_PRE) { CMS_RecipientInfo *ri = (CMS_RecipientInfo *)*pval; if (ri->type == CMS_RECIPINFO_TRANS) { CMS_KeyTransRecipientInfo *ktri = ri->d.ktri; EVP_PKEY_free(ktri->pkey); X509_free(ktri->recip); EVP_PKEY_CTX_free(ktri->pctx); } else if (ri->type == CMS_RECIPINFO_KEK) { CMS_KEKRecipientInfo *kekri = ri->d.kekri; OPENSSL_clear_free(kekri->key, kekri->keylen); } else if (ri->type == CMS_RECIPINFO_PASS) { CMS_PasswordRecipientInfo *pwri = ri->d.pwri; OPENSSL_clear_free(pwri->pass, pwri->passlen); } } return 1; } ASN1_CHOICE_cb(CMS_RecipientInfo, cms_ri_cb) = { ASN1_SIMPLE(CMS_RecipientInfo, d.ktri, CMS_KeyTransRecipientInfo), ASN1_IMP(CMS_RecipientInfo, d.kari, CMS_KeyAgreeRecipientInfo, 1), ASN1_IMP(CMS_RecipientInfo, d.kekri, CMS_KEKRecipientInfo, 2), ASN1_IMP(CMS_RecipientInfo, d.pwri, CMS_PasswordRecipientInfo, 3), ASN1_IMP(CMS_RecipientInfo, d.ori, CMS_OtherRecipientInfo, 4) } ASN1_CHOICE_END_cb(CMS_RecipientInfo, CMS_RecipientInfo, type) ASN1_NDEF_SEQUENCE(CMS_EnvelopedData) = { ASN1_EMBED(CMS_EnvelopedData, version, INT32), ASN1_IMP_OPT(CMS_EnvelopedData, originatorInfo, CMS_OriginatorInfo, 0), ASN1_SET_OF(CMS_EnvelopedData, recipientInfos, CMS_RecipientInfo), ASN1_SIMPLE(CMS_EnvelopedData, encryptedContentInfo, CMS_EncryptedContentInfo), ASN1_IMP_SET_OF_OPT(CMS_EnvelopedData, unprotectedAttrs, X509_ATTRIBUTE, 1) } ASN1_NDEF_SEQUENCE_END(CMS_EnvelopedData) ASN1_NDEF_SEQUENCE(CMS_DigestedData) = { ASN1_EMBED(CMS_DigestedData, version, INT32), ASN1_SIMPLE(CMS_DigestedData, digestAlgorithm, X509_ALGOR), ASN1_SIMPLE(CMS_DigestedData, encapContentInfo, CMS_EncapsulatedContentInfo), ASN1_SIMPLE(CMS_DigestedData, digest, ASN1_OCTET_STRING) } ASN1_NDEF_SEQUENCE_END(CMS_DigestedData) ASN1_NDEF_SEQUENCE(CMS_EncryptedData) = { ASN1_EMBED(CMS_EncryptedData, version, INT32), ASN1_SIMPLE(CMS_EncryptedData, encryptedContentInfo, CMS_EncryptedContentInfo), ASN1_IMP_SET_OF_OPT(CMS_EncryptedData, unprotectedAttrs, X509_ATTRIBUTE, 1) } ASN1_NDEF_SEQUENCE_END(CMS_EncryptedData) ASN1_NDEF_SEQUENCE(CMS_AuthenticatedData) = { ASN1_EMBED(CMS_AuthenticatedData, version, INT32), ASN1_IMP_OPT(CMS_AuthenticatedData, originatorInfo, CMS_OriginatorInfo, 0), ASN1_SET_OF(CMS_AuthenticatedData, recipientInfos, CMS_RecipientInfo), ASN1_SIMPLE(CMS_AuthenticatedData, macAlgorithm, X509_ALGOR), ASN1_IMP(CMS_AuthenticatedData, digestAlgorithm, X509_ALGOR, 1), ASN1_SIMPLE(CMS_AuthenticatedData, encapContentInfo, CMS_EncapsulatedContentInfo), ASN1_IMP_SET_OF_OPT(CMS_AuthenticatedData, authAttrs, X509_ALGOR, 2), ASN1_SIMPLE(CMS_AuthenticatedData, mac, ASN1_OCTET_STRING), ASN1_IMP_SET_OF_OPT(CMS_AuthenticatedData, unauthAttrs, X509_ALGOR, 3) } static_ASN1_NDEF_SEQUENCE_END(CMS_AuthenticatedData) ASN1_NDEF_SEQUENCE(CMS_CompressedData) = { ASN1_EMBED(CMS_CompressedData, version, INT32), ASN1_SIMPLE(CMS_CompressedData, compressionAlgorithm, X509_ALGOR), ASN1_SIMPLE(CMS_CompressedData, encapContentInfo, CMS_EncapsulatedContentInfo), } ASN1_NDEF_SEQUENCE_END(CMS_CompressedData) /* This is the ANY DEFINED BY table for the top level ContentInfo structure */ ASN1_ADB_TEMPLATE(cms_default) = ASN1_EXP(CMS_ContentInfo, d.other, ASN1_ANY, 0); ASN1_ADB(CMS_ContentInfo) = { ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP(CMS_ContentInfo, d.data, ASN1_OCTET_STRING_NDEF, 0)), ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP(CMS_ContentInfo, d.signedData, CMS_SignedData, 0)), ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP(CMS_ContentInfo, d.envelopedData, CMS_EnvelopedData, 0)), ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP(CMS_ContentInfo, d.digestedData, CMS_DigestedData, 0)), ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP(CMS_ContentInfo, d.encryptedData, CMS_EncryptedData, 0)), ADB_ENTRY(NID_id_smime_ct_authData, ASN1_NDEF_EXP(CMS_ContentInfo, d.authenticatedData, CMS_AuthenticatedData, 0)), ADB_ENTRY(NID_id_smime_ct_compressedData, ASN1_NDEF_EXP(CMS_ContentInfo, d.compressedData, CMS_CompressedData, 0)), } ASN1_ADB_END(CMS_ContentInfo, 0, contentType, 0, &cms_default_tt, NULL); /* CMS streaming support */ static int cms_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { ASN1_STREAM_ARG *sarg = exarg; CMS_ContentInfo *cms = NULL; if (pval) cms = (CMS_ContentInfo *)*pval; else return 1; switch (operation) { case ASN1_OP_STREAM_PRE: if (CMS_stream(&sarg->boundary, cms) <= 0) return 0; /* fall thru */ case ASN1_OP_DETACHED_PRE: sarg->ndef_bio = CMS_dataInit(cms, sarg->out); if (!sarg->ndef_bio) return 0; break; case ASN1_OP_STREAM_POST: case ASN1_OP_DETACHED_POST: if (CMS_dataFinal(cms, sarg->ndef_bio) <= 0) return 0; break; } return 1; } ASN1_NDEF_SEQUENCE_cb(CMS_ContentInfo, cms_cb) = { ASN1_SIMPLE(CMS_ContentInfo, contentType, ASN1_OBJECT), ASN1_ADB_OBJECT(CMS_ContentInfo) } ASN1_NDEF_SEQUENCE_END_cb(CMS_ContentInfo, CMS_ContentInfo) /* Specials for signed attributes */ /* * When signing attributes we want to reorder them to match the sorted * encoding. */ ASN1_ITEM_TEMPLATE(CMS_Attributes_Sign) = ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, CMS_ATTRIBUTES, X509_ATTRIBUTE) ASN1_ITEM_TEMPLATE_END(CMS_Attributes_Sign) /* * When verifying attributes we need to use the received order. So we use * SEQUENCE OF and tag it to SET OF */ ASN1_ITEM_TEMPLATE(CMS_Attributes_Verify) = ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL, V_ASN1_SET, CMS_ATTRIBUTES, X509_ATTRIBUTE) ASN1_ITEM_TEMPLATE_END(CMS_Attributes_Verify) ASN1_CHOICE(CMS_ReceiptsFrom) = { ASN1_IMP_EMBED(CMS_ReceiptsFrom, d.allOrFirstTier, INT32, 0), ASN1_IMP_SEQUENCE_OF(CMS_ReceiptsFrom, d.receiptList, GENERAL_NAMES, 1) } static_ASN1_CHOICE_END(CMS_ReceiptsFrom) ASN1_SEQUENCE(CMS_ReceiptRequest) = { ASN1_SIMPLE(CMS_ReceiptRequest, signedContentIdentifier, ASN1_OCTET_STRING), ASN1_SIMPLE(CMS_ReceiptRequest, receiptsFrom, CMS_ReceiptsFrom), ASN1_SEQUENCE_OF(CMS_ReceiptRequest, receiptsTo, GENERAL_NAMES) } ASN1_SEQUENCE_END(CMS_ReceiptRequest) ASN1_SEQUENCE(CMS_Receipt) = { ASN1_EMBED(CMS_Receipt, version, INT32), ASN1_SIMPLE(CMS_Receipt, contentType, ASN1_OBJECT), ASN1_SIMPLE(CMS_Receipt, signedContentIdentifier, ASN1_OCTET_STRING), ASN1_SIMPLE(CMS_Receipt, originatorSignatureValue, ASN1_OCTET_STRING) } ASN1_SEQUENCE_END(CMS_Receipt) /* * Utilities to encode the CMS_SharedInfo structure used during key * derivation. */ typedef struct { X509_ALGOR *keyInfo; ASN1_OCTET_STRING *entityUInfo; ASN1_OCTET_STRING *suppPubInfo; } CMS_SharedInfo; ASN1_SEQUENCE(CMS_SharedInfo) = { ASN1_SIMPLE(CMS_SharedInfo, keyInfo, X509_ALGOR), ASN1_EXP_OPT(CMS_SharedInfo, entityUInfo, ASN1_OCTET_STRING, 0), ASN1_EXP_OPT(CMS_SharedInfo, suppPubInfo, ASN1_OCTET_STRING, 2), } static_ASN1_SEQUENCE_END(CMS_SharedInfo) int CMS_SharedInfo_encode(unsigned char **pder, X509_ALGOR *kekalg, ASN1_OCTET_STRING *ukm, int keylen) { union { CMS_SharedInfo *pecsi; ASN1_VALUE *a; } intsi = { NULL }; ASN1_OCTET_STRING oklen; unsigned char kl[4]; CMS_SharedInfo ecsi; keylen <<= 3; kl[0] = (keylen >> 24) & 0xff; kl[1] = (keylen >> 16) & 0xff; kl[2] = (keylen >> 8) & 0xff; kl[3] = keylen & 0xff; oklen.length = 4; oklen.data = kl; oklen.type = V_ASN1_OCTET_STRING; oklen.flags = 0; ecsi.keyInfo = kekalg; ecsi.entityUInfo = ukm; ecsi.suppPubInfo = &oklen; intsi.pecsi = &ecsi; return ASN1_item_i2d(intsi.a, pder, ASN1_ITEM_rptr(CMS_SharedInfo)); }