1 /* 2 * Copyright 2008-2022 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <openssl/asn1t.h> 11 #include <openssl/x509.h> 12 #include <openssl/err.h> 13 #include <openssl/pem.h> 14 #include <openssl/cms.h> 15 #include "cms_local.h" 16 17 /* unfortunately cannot constify BIO_new_NDEF() due to this and PKCS7_stream() */ 18 int CMS_stream(unsigned char ***boundary, CMS_ContentInfo *cms) 19 { 20 ASN1_OCTET_STRING **pos; 21 pos = CMS_get0_content(cms); 22 if (pos == NULL) 23 return 0; 24 if (*pos == NULL) 25 *pos = ASN1_OCTET_STRING_new(); 26 if (*pos != NULL) { 27 (*pos)->flags |= ASN1_STRING_FLAG_NDEF; 28 (*pos)->flags &= ~ASN1_STRING_FLAG_CONT; 29 *boundary = &(*pos)->data; 30 return 1; 31 } 32 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 33 return 0; 34 } 35 36 CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms) 37 { 38 CMS_ContentInfo *ci; 39 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms); 40 41 ci = ASN1_item_d2i_bio_ex(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms, 42 ossl_cms_ctx_get0_libctx(ctx), 43 ossl_cms_ctx_get0_propq(ctx)); 44 if (ci != NULL) { 45 ERR_set_mark(); 46 ossl_cms_resolve_libctx(ci); 47 ERR_pop_to_mark(); 48 } 49 return ci; 50 } 51 52 int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms) 53 { 54 return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms); 55 } 56 57 IMPLEMENT_PEM_rw(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo) 58 59 BIO *BIO_new_CMS(BIO *out, CMS_ContentInfo *cms) 60 { 61 return BIO_new_NDEF(out, (ASN1_VALUE *)cms, 62 ASN1_ITEM_rptr(CMS_ContentInfo)); 63 } 64 65 /* CMS wrappers round generalised stream and MIME routines */ 66 67 int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags) 68 { 69 return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags, 70 ASN1_ITEM_rptr(CMS_ContentInfo)); 71 } 72 73 int PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, 74 int flags) 75 { 76 return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)cms, in, flags, 77 "CMS", ASN1_ITEM_rptr(CMS_ContentInfo)); 78 } 79 80 int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags) 81 { 82 STACK_OF(X509_ALGOR) *mdalgs; 83 int ctype_nid = OBJ_obj2nid(cms->contentType); 84 int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms)); 85 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms); 86 87 if (ctype_nid == NID_pkcs7_signed) 88 mdalgs = cms->d.signedData->digestAlgorithms; 89 else 90 mdalgs = NULL; 91 92 return SMIME_write_ASN1_ex(bio, (ASN1_VALUE *)cms, data, flags, ctype_nid, 93 econt_nid, mdalgs, 94 ASN1_ITEM_rptr(CMS_ContentInfo), 95 ossl_cms_ctx_get0_libctx(ctx), 96 ossl_cms_ctx_get0_propq(ctx)); 97 } 98 99 CMS_ContentInfo *SMIME_read_CMS_ex(BIO *bio, int flags, BIO **bcont, 100 CMS_ContentInfo **cms) 101 { 102 CMS_ContentInfo *ci; 103 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms); 104 105 ci = (CMS_ContentInfo *)SMIME_read_ASN1_ex(bio, flags, bcont, 106 ASN1_ITEM_rptr(CMS_ContentInfo), 107 (ASN1_VALUE **)cms, 108 ossl_cms_ctx_get0_libctx(ctx), 109 ossl_cms_ctx_get0_propq(ctx)); 110 if (ci != NULL) { 111 ERR_set_mark(); 112 ossl_cms_resolve_libctx(ci); 113 ERR_pop_to_mark(); 114 } 115 return ci; 116 } 117 118 CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont) 119 { 120 return SMIME_read_CMS_ex(bio, 0, bcont, NULL); 121 } 122