/* * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (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 "internal/cryptlib.h" #include #include #include #include "pk7_local.h" /* PKCS#7 ASN1 module */ /* This is the ANY DEFINED BY table for the top level PKCS#7 structure */ ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0); ASN1_ADB(PKCS7) = { ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)), ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)), ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)), ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)), ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)), ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0)) } ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL); /* PKCS#7 streaming support */ static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { ASN1_STREAM_ARG *sarg = exarg; PKCS7 **pp7 = (PKCS7 **)pval; switch (operation) { case ASN1_OP_STREAM_PRE: if (PKCS7_stream(&sarg->boundary, *pp7) <= 0) return 0; /* fall thru */ case ASN1_OP_DETACHED_PRE: sarg->ndef_bio = PKCS7_dataInit(*pp7, sarg->out); if (!sarg->ndef_bio) return 0; break; case ASN1_OP_STREAM_POST: case ASN1_OP_DETACHED_POST: if (PKCS7_dataFinal(*pp7, sarg->ndef_bio) <= 0) return 0; break; } return 1; } ASN1_NDEF_SEQUENCE_cb(PKCS7, pk7_cb) = { ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT), ASN1_ADB_OBJECT(PKCS7) }ASN1_NDEF_SEQUENCE_END_cb(PKCS7, PKCS7) PKCS7 *d2i_PKCS7(PKCS7 **a, const unsigned char **in, long len) { PKCS7 *ret; ret = (PKCS7 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, (PKCS7_it())); if (ret != NULL) pkcs7_resolve_libctx(ret); return ret; } int i2d_PKCS7(const PKCS7 *a, unsigned char **out) { return ASN1_item_i2d((const ASN1_VALUE *)a, out, (PKCS7_it()));\ } PKCS7 *PKCS7_new(void) { return (PKCS7 *)ASN1_item_new(ASN1_ITEM_rptr(PKCS7)); } PKCS7 *PKCS7_new_ex(OSSL_LIB_CTX *libctx, const char *propq) { PKCS7 *pkcs7 = PKCS7_new(); if (pkcs7 != NULL) { pkcs7->ctx.libctx = libctx; pkcs7->ctx.propq = NULL; if (propq != NULL) { pkcs7->ctx.propq = OPENSSL_strdup(propq); if (pkcs7->ctx.propq == NULL) { PKCS7_free(pkcs7); pkcs7 = NULL; ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); } } } return pkcs7; } void PKCS7_free(PKCS7 *p7) { if (p7 != NULL) { OPENSSL_free(p7->ctx.propq); ASN1_item_free((ASN1_VALUE *)p7, ASN1_ITEM_rptr(PKCS7)); } } IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7) IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7) ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = { ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER), ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR), ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7), ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0), ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1), ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO) } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED) /* Minor tweak to operation: free up EVP_PKEY */ static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { if (operation == ASN1_OP_FREE_POST) { PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval; EVP_PKEY_free(si->pkey); } return 1; } ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = { ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER), ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL), ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR), /* NB this should be a SET OF but we use a SEQUENCE OF so the * original order * is retained when the structure is reencoded. * Since the attributes are implicitly tagged this will not affect * the encoding. */ ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0), ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR), ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING), ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1) } ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO) ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = { ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME), ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER) } ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL) ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = { ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER), ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO), ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT) } ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE) /* Minor tweak to operation: free up X509 */ static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) { if (operation == ASN1_OP_FREE_POST) { PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval; X509_free(ri->cert); } return 1; } ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = { ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER), ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL), ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR), ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING) } ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO) ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = { ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT), ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR), ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING_NDEF, 0) } ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT) ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = { ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER), ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO), ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR), ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT), ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0), ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1), ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO) } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE) ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = { ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER), ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT) } ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT) ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = { ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER), ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR), ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7), ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING) } ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST) IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST) /* Specials for authenticated attributes */ /* * When signing attributes we want to reorder them to match the sorted * encoding. */ ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) = ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE) ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_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(PKCS7_ATTR_VERIFY) = ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL, V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE) ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY) IMPLEMENT_ASN1_PRINT_FUNCTION(PKCS7)