| /* |
| * 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 <stdio.h> |
| #include "internal/cryptlib.h" |
| #include <openssl/asn1t.h> |
| #include <openssl/pkcs7.h> |
| #include <openssl/x509.h> |
| #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; |
| OSSL_LIB_CTX *libctx = NULL; |
| const char *propq = NULL; |
| |
| if (a != NULL && *a != NULL) { |
| libctx = (*a)->ctx.libctx; |
| propq = (*a)->ctx.propq; |
| } |
| |
| ret = (PKCS7 *)ASN1_item_d2i_ex((ASN1_VALUE **)a, in, len, (PKCS7_it()), |
| libctx, propq); |
| if (ret != NULL) |
| ossl_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 *)ASN1_item_new_ex(ASN1_ITEM_rptr(PKCS7), libctx, |
| propq); |
| |
| 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) |