[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/x509.h>
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| 13 | #include <openssl/x509v3.h>
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| 14 | #include <openssl/err.h>
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| 15 | #include <openssl/cms.h>
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| 16 | #include "cms_lcl.h"
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| 17 | #include "internal/asn1_int.h"
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| 18 |
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| 19 | static BIO *cms_get_text_bio(BIO *out, unsigned int flags)
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| 20 | {
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| 21 | BIO *rbio;
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| 22 | if (out == NULL)
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| 23 | rbio = BIO_new(BIO_s_null());
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| 24 | else if (flags & CMS_TEXT) {
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| 25 | rbio = BIO_new(BIO_s_mem());
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| 26 | BIO_set_mem_eof_return(rbio, 0);
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| 27 | } else
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| 28 | rbio = out;
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| 29 | return rbio;
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| 30 | }
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| 31 |
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| 32 | static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
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| 33 | {
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| 34 | unsigned char buf[4096];
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| 35 | int r = 0, i;
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| 36 | BIO *tmpout;
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| 37 |
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| 38 | tmpout = cms_get_text_bio(out, flags);
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| 39 |
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| 40 | if (tmpout == NULL) {
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| 41 | CMSerr(CMS_F_CMS_COPY_CONTENT, ERR_R_MALLOC_FAILURE);
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| 42 | goto err;
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| 43 | }
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| 44 |
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| 45 | /* Read all content through chain to process digest, decrypt etc */
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| 46 | for (;;) {
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| 47 | i = BIO_read(in, buf, sizeof(buf));
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| 48 | if (i <= 0) {
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| 49 | if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
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| 50 | if (!BIO_get_cipher_status(in))
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| 51 | goto err;
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| 52 | }
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| 53 | if (i < 0)
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| 54 | goto err;
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| 55 | break;
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| 56 | }
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| 57 |
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| 58 | if (tmpout && (BIO_write(tmpout, buf, i) != i))
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| 59 | goto err;
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| 60 | }
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| 61 |
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| 62 | if (flags & CMS_TEXT) {
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| 63 | if (!SMIME_text(tmpout, out)) {
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| 64 | CMSerr(CMS_F_CMS_COPY_CONTENT, CMS_R_SMIME_TEXT_ERROR);
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| 65 | goto err;
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| 66 | }
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| 67 | }
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| 68 |
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| 69 | r = 1;
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| 70 |
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| 71 | err:
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| 72 | if (tmpout != out)
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| 73 | BIO_free(tmpout);
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| 74 | return r;
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| 75 |
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| 76 | }
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| 77 |
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| 78 | static int check_content(CMS_ContentInfo *cms)
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| 79 | {
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| 80 | ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
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| 81 | if (!pos || !*pos) {
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| 82 | CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
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| 83 | return 0;
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| 84 | }
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| 85 | return 1;
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| 86 | }
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| 87 |
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| 88 | static void do_free_upto(BIO *f, BIO *upto)
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| 89 | {
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| 90 | if (upto) {
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| 91 | BIO *tbio;
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| 92 | do {
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| 93 | tbio = BIO_pop(f);
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| 94 | BIO_free(f);
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| 95 | f = tbio;
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| 96 | }
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| 97 | while (f && f != upto);
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| 98 | } else
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| 99 | BIO_free_all(f);
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| 100 | }
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| 101 |
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| 102 | int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
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| 103 | {
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| 104 | BIO *cont;
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| 105 | int r;
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| 106 | if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
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| 107 | CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
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| 108 | return 0;
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| 109 | }
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| 110 | cont = CMS_dataInit(cms, NULL);
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| 111 | if (!cont)
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| 112 | return 0;
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| 113 | r = cms_copy_content(out, cont, flags);
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| 114 | BIO_free_all(cont);
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| 115 | return r;
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| 116 | }
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| 117 |
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| 118 | CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
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| 119 | {
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| 120 | CMS_ContentInfo *cms;
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| 121 | cms = cms_Data_create();
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| 122 | if (!cms)
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| 123 | return NULL;
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| 124 |
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| 125 | if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
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| 126 | return cms;
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| 127 |
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| 128 | CMS_ContentInfo_free(cms);
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| 129 |
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| 130 | return NULL;
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| 131 | }
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| 132 |
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| 133 | int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
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| 134 | unsigned int flags)
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| 135 | {
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| 136 | BIO *cont;
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| 137 | int r;
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| 138 | if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
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| 139 | CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
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| 140 | return 0;
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| 141 | }
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| 142 |
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| 143 | if (!dcont && !check_content(cms))
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| 144 | return 0;
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| 145 |
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| 146 | cont = CMS_dataInit(cms, dcont);
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| 147 | if (!cont)
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| 148 | return 0;
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| 149 | r = cms_copy_content(out, cont, flags);
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| 150 | if (r)
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| 151 | r = cms_DigestedData_do_final(cms, cont, 1);
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| 152 | do_free_upto(cont, dcont);
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| 153 | return r;
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| 154 | }
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| 155 |
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| 156 | CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
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| 157 | unsigned int flags)
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| 158 | {
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| 159 | CMS_ContentInfo *cms;
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| 160 | if (!md)
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| 161 | md = EVP_sha1();
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| 162 | cms = cms_DigestedData_create(md);
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| 163 | if (!cms)
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| 164 | return NULL;
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| 165 |
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| 166 | if (!(flags & CMS_DETACHED))
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| 167 | CMS_set_detached(cms, 0);
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| 168 |
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| 169 | if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
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| 170 | return cms;
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| 171 |
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| 172 | CMS_ContentInfo_free(cms);
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| 173 | return NULL;
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| 174 | }
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| 175 |
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| 176 | int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
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| 177 | const unsigned char *key, size_t keylen,
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| 178 | BIO *dcont, BIO *out, unsigned int flags)
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| 179 | {
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| 180 | BIO *cont;
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| 181 | int r;
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| 182 | if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
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| 183 | CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
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| 184 | CMS_R_TYPE_NOT_ENCRYPTED_DATA);
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| 185 | return 0;
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| 186 | }
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| 187 |
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| 188 | if (!dcont && !check_content(cms))
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| 189 | return 0;
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| 190 |
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| 191 | if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
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| 192 | return 0;
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| 193 | cont = CMS_dataInit(cms, dcont);
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| 194 | if (!cont)
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| 195 | return 0;
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| 196 | r = cms_copy_content(out, cont, flags);
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| 197 | do_free_upto(cont, dcont);
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| 198 | return r;
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| 199 | }
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| 200 |
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| 201 | CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
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| 202 | const unsigned char *key,
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| 203 | size_t keylen, unsigned int flags)
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| 204 | {
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| 205 | CMS_ContentInfo *cms;
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| 206 | if (!cipher) {
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| 207 | CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
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| 208 | return NULL;
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| 209 | }
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| 210 | cms = CMS_ContentInfo_new();
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| 211 | if (cms == NULL)
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| 212 | return NULL;
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| 213 | if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
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| 214 | return NULL;
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| 215 |
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| 216 | if (!(flags & CMS_DETACHED))
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| 217 | CMS_set_detached(cms, 0);
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| 218 |
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| 219 | if ((flags & (CMS_STREAM | CMS_PARTIAL))
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| 220 | || CMS_final(cms, in, NULL, flags))
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| 221 | return cms;
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| 222 |
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| 223 | CMS_ContentInfo_free(cms);
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| 224 | return NULL;
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| 225 | }
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| 226 |
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| 227 | static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
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| 228 | X509_STORE *store,
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| 229 | STACK_OF(X509) *certs,
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| 230 | STACK_OF(X509_CRL) *crls)
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| 231 | {
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| 232 | X509_STORE_CTX *ctx = X509_STORE_CTX_new();
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| 233 | X509 *signer;
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| 234 | int i, j, r = 0;
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| 235 |
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| 236 | if (ctx == NULL) {
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| 237 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, ERR_R_MALLOC_FAILURE);
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| 238 | goto err;
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| 239 | }
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| 240 | CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
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| 241 | if (!X509_STORE_CTX_init(ctx, store, signer, certs)) {
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| 242 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, CMS_R_STORE_INIT_ERROR);
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| 243 | goto err;
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| 244 | }
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| 245 | X509_STORE_CTX_set_default(ctx, "smime_sign");
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| 246 | if (crls)
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| 247 | X509_STORE_CTX_set0_crls(ctx, crls);
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| 248 |
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| 249 | i = X509_verify_cert(ctx);
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| 250 | if (i <= 0) {
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| 251 | j = X509_STORE_CTX_get_error(ctx);
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| 252 | CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
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| 253 | CMS_R_CERTIFICATE_VERIFY_ERROR);
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| 254 | ERR_add_error_data(2, "Verify error:",
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| 255 | X509_verify_cert_error_string(j));
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| 256 | goto err;
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| 257 | }
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| 258 | r = 1;
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| 259 | err:
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| 260 | X509_STORE_CTX_free(ctx);
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| 261 | return r;
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| 262 |
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| 263 | }
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| 264 |
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| 265 | int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
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| 266 | X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
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| 267 | {
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| 268 | CMS_SignerInfo *si;
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| 269 | STACK_OF(CMS_SignerInfo) *sinfos;
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| 270 | STACK_OF(X509) *cms_certs = NULL;
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| 271 | STACK_OF(X509_CRL) *crls = NULL;
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| 272 | X509 *signer;
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| 273 | int i, scount = 0, ret = 0;
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| 274 | BIO *cmsbio = NULL, *tmpin = NULL, *tmpout = NULL;
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| 275 |
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| 276 | if (!dcont && !check_content(cms))
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| 277 | return 0;
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| 278 | if (dcont && !(flags & CMS_BINARY)) {
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| 279 | const ASN1_OBJECT *coid = CMS_get0_eContentType(cms);
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| 280 | if (OBJ_obj2nid(coid) == NID_id_ct_asciiTextWithCRLF)
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| 281 | flags |= CMS_ASCIICRLF;
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| 282 | }
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| 283 |
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| 284 | /* Attempt to find all signer certificates */
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| 285 |
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| 286 | sinfos = CMS_get0_SignerInfos(cms);
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| 287 |
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| 288 | if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
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| 289 | CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
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| 290 | goto err;
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| 291 | }
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| 292 |
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| 293 | for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
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| 294 | si = sk_CMS_SignerInfo_value(sinfos, i);
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| 295 | CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
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| 296 | if (signer)
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| 297 | scount++;
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| 298 | }
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| 299 |
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| 300 | if (scount != sk_CMS_SignerInfo_num(sinfos))
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| 301 | scount += CMS_set1_signers_certs(cms, certs, flags);
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| 302 |
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| 303 | if (scount != sk_CMS_SignerInfo_num(sinfos)) {
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| 304 | CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
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| 305 | goto err;
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| 306 | }
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| 307 |
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| 308 | /* Attempt to verify all signers certs */
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| 309 |
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| 310 | if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
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| 311 | cms_certs = CMS_get1_certs(cms);
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| 312 | if (!(flags & CMS_NOCRL))
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| 313 | crls = CMS_get1_crls(cms);
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| 314 | for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
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| 315 | si = sk_CMS_SignerInfo_value(sinfos, i);
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| 316 | if (!cms_signerinfo_verify_cert(si, store, cms_certs, crls))
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| 317 | goto err;
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| 318 | }
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| 319 | }
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| 320 |
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| 321 | /* Attempt to verify all SignerInfo signed attribute signatures */
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| 322 |
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| 323 | if (!(flags & CMS_NO_ATTR_VERIFY)) {
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| 324 | for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
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| 325 | si = sk_CMS_SignerInfo_value(sinfos, i);
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| 326 | if (CMS_signed_get_attr_count(si) < 0)
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| 327 | continue;
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| 328 | if (CMS_SignerInfo_verify(si) <= 0)
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| 329 | goto err;
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| 330 | }
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| 331 | }
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| 332 |
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| 333 | /*
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| 334 | * Performance optimization: if the content is a memory BIO then store
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| 335 | * its contents in a temporary read only memory BIO. This avoids
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| 336 | * potentially large numbers of slow copies of data which will occur when
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| 337 | * reading from a read write memory BIO when signatures are calculated.
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| 338 | */
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| 339 |
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| 340 | if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
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| 341 | char *ptr;
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| 342 | long len;
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| 343 | len = BIO_get_mem_data(dcont, &ptr);
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| 344 | tmpin = BIO_new_mem_buf(ptr, len);
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| 345 | if (tmpin == NULL) {
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| 346 | CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
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| 347 | goto err2;
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| 348 | }
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| 349 | } else
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| 350 | tmpin = dcont;
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| 351 | /*
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| 352 | * If not binary mode and detached generate digests by *writing* through
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| 353 | * the BIO. That makes it possible to canonicalise the input.
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| 354 | */
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| 355 | if (!(flags & SMIME_BINARY) && dcont) {
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| 356 | /*
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| 357 | * Create output BIO so we can either handle text or to ensure
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| 358 | * included content doesn't override detached content.
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| 359 | */
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| 360 | tmpout = cms_get_text_bio(out, flags);
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| 361 | if (!tmpout) {
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| 362 | CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
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| 363 | goto err;
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| 364 | }
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| 365 | cmsbio = CMS_dataInit(cms, tmpout);
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| 366 | if (!cmsbio)
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| 367 | goto err;
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| 368 | /*
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| 369 | * Don't use SMIME_TEXT for verify: it adds headers and we want to
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| 370 | * remove them.
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| 371 | */
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| 372 | SMIME_crlf_copy(dcont, cmsbio, flags & ~SMIME_TEXT);
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| 373 |
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| 374 | if (flags & CMS_TEXT) {
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| 375 | if (!SMIME_text(tmpout, out)) {
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| 376 | CMSerr(CMS_F_CMS_VERIFY, CMS_R_SMIME_TEXT_ERROR);
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| 377 | goto err;
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| 378 | }
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| 379 | }
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| 380 | } else {
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| 381 | cmsbio = CMS_dataInit(cms, tmpin);
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| 382 | if (!cmsbio)
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| 383 | goto err;
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| 384 |
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| 385 | if (!cms_copy_content(out, cmsbio, flags))
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| 386 | goto err;
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| 387 |
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| 388 | }
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| 389 | if (!(flags & CMS_NO_CONTENT_VERIFY)) {
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| 390 | for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
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| 391 | si = sk_CMS_SignerInfo_value(sinfos, i);
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| 392 | if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
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| 393 | CMSerr(CMS_F_CMS_VERIFY, CMS_R_CONTENT_VERIFY_ERROR);
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| 394 | goto err;
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| 395 | }
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| 396 | }
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| 397 | }
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| 398 |
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| 399 | ret = 1;
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| 400 |
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| 401 | err:
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| 402 | if (!(flags & SMIME_BINARY) && dcont) {
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| 403 | do_free_upto(cmsbio, tmpout);
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| 404 | if (tmpin != dcont)
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| 405 | BIO_free(tmpin);
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| 406 | } else {
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| 407 | if (dcont && (tmpin == dcont))
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| 408 | do_free_upto(cmsbio, dcont);
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| 409 | else
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| 410 | BIO_free_all(cmsbio);
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| 411 | }
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| 412 |
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| 413 | if (out != tmpout)
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| 414 | BIO_free_all(tmpout);
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| 415 |
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| 416 | err2:
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| 417 | sk_X509_pop_free(cms_certs, X509_free);
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| 418 | sk_X509_CRL_pop_free(crls, X509_CRL_free);
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| 419 |
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| 420 | return ret;
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| 421 | }
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| 422 |
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| 423 | int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
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| 424 | STACK_OF(X509) *certs,
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| 425 | X509_STORE *store, unsigned int flags)
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| 426 | {
|
---|
| 427 | int r;
|
---|
| 428 | flags &= ~(CMS_DETACHED | CMS_TEXT);
|
---|
| 429 | r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
|
---|
| 430 | if (r <= 0)
|
---|
| 431 | return r;
|
---|
| 432 | return cms_Receipt_verify(rcms, ocms);
|
---|
| 433 | }
|
---|
| 434 |
|
---|
| 435 | CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey,
|
---|
| 436 | STACK_OF(X509) *certs, BIO *data,
|
---|
| 437 | unsigned int flags)
|
---|
| 438 | {
|
---|
| 439 | CMS_ContentInfo *cms;
|
---|
| 440 | int i;
|
---|
| 441 |
|
---|
| 442 | cms = CMS_ContentInfo_new();
|
---|
| 443 | if (cms == NULL || !CMS_SignedData_init(cms))
|
---|
| 444 | goto merr;
|
---|
| 445 | if (flags & CMS_ASCIICRLF
|
---|
| 446 | && !CMS_set1_eContentType(cms,
|
---|
| 447 | OBJ_nid2obj(NID_id_ct_asciiTextWithCRLF)))
|
---|
| 448 | goto err;
|
---|
| 449 |
|
---|
| 450 | if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
|
---|
| 451 | CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
|
---|
| 452 | goto err;
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | for (i = 0; i < sk_X509_num(certs); i++) {
|
---|
| 456 | X509 *x = sk_X509_value(certs, i);
|
---|
| 457 | if (!CMS_add1_cert(cms, x))
|
---|
| 458 | goto merr;
|
---|
| 459 | }
|
---|
| 460 |
|
---|
| 461 | if (!(flags & CMS_DETACHED))
|
---|
| 462 | CMS_set_detached(cms, 0);
|
---|
| 463 |
|
---|
| 464 | if ((flags & (CMS_STREAM | CMS_PARTIAL))
|
---|
| 465 | || CMS_final(cms, data, NULL, flags))
|
---|
| 466 | return cms;
|
---|
| 467 | else
|
---|
| 468 | goto err;
|
---|
| 469 |
|
---|
| 470 | merr:
|
---|
| 471 | CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
|
---|
| 472 |
|
---|
| 473 | err:
|
---|
| 474 | CMS_ContentInfo_free(cms);
|
---|
| 475 | return NULL;
|
---|
| 476 | }
|
---|
| 477 |
|
---|
| 478 | CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
|
---|
| 479 | X509 *signcert, EVP_PKEY *pkey,
|
---|
| 480 | STACK_OF(X509) *certs, unsigned int flags)
|
---|
| 481 | {
|
---|
| 482 | CMS_SignerInfo *rct_si;
|
---|
| 483 | CMS_ContentInfo *cms = NULL;
|
---|
| 484 | ASN1_OCTET_STRING **pos, *os;
|
---|
| 485 | BIO *rct_cont = NULL;
|
---|
| 486 | int r = 0;
|
---|
| 487 |
|
---|
| 488 | flags &= ~(CMS_STREAM | CMS_TEXT);
|
---|
| 489 | /* Not really detached but avoids content being allocated */
|
---|
| 490 | flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
|
---|
| 491 | if (!pkey || !signcert) {
|
---|
| 492 | CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
|
---|
| 493 | return NULL;
|
---|
| 494 | }
|
---|
| 495 |
|
---|
| 496 | /* Initialize signed data */
|
---|
| 497 |
|
---|
| 498 | cms = CMS_sign(NULL, NULL, certs, NULL, flags);
|
---|
| 499 | if (!cms)
|
---|
| 500 | goto err;
|
---|
| 501 |
|
---|
| 502 | /* Set inner content type to signed receipt */
|
---|
| 503 | if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
|
---|
| 504 | goto err;
|
---|
| 505 |
|
---|
| 506 | rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
|
---|
| 507 | if (!rct_si) {
|
---|
| 508 | CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
|
---|
| 509 | goto err;
|
---|
| 510 | }
|
---|
| 511 |
|
---|
| 512 | os = cms_encode_Receipt(si);
|
---|
| 513 |
|
---|
| 514 | if (!os)
|
---|
| 515 | goto err;
|
---|
| 516 |
|
---|
| 517 | /* Set content to digest */
|
---|
| 518 | rct_cont = BIO_new_mem_buf(os->data, os->length);
|
---|
| 519 | if (!rct_cont)
|
---|
| 520 | goto err;
|
---|
| 521 |
|
---|
| 522 | /* Add msgSigDigest attribute */
|
---|
| 523 |
|
---|
| 524 | if (!cms_msgSigDigest_add1(rct_si, si))
|
---|
| 525 | goto err;
|
---|
| 526 |
|
---|
| 527 | /* Finalize structure */
|
---|
| 528 | if (!CMS_final(cms, rct_cont, NULL, flags))
|
---|
| 529 | goto err;
|
---|
| 530 |
|
---|
| 531 | /* Set embedded content */
|
---|
| 532 | pos = CMS_get0_content(cms);
|
---|
| 533 | *pos = os;
|
---|
| 534 |
|
---|
| 535 | r = 1;
|
---|
| 536 |
|
---|
| 537 | err:
|
---|
| 538 | BIO_free(rct_cont);
|
---|
| 539 | if (r)
|
---|
| 540 | return cms;
|
---|
| 541 | CMS_ContentInfo_free(cms);
|
---|
| 542 | return NULL;
|
---|
| 543 |
|
---|
| 544 | }
|
---|
| 545 |
|
---|
| 546 | CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
|
---|
| 547 | const EVP_CIPHER *cipher, unsigned int flags)
|
---|
| 548 | {
|
---|
| 549 | CMS_ContentInfo *cms;
|
---|
| 550 | int i;
|
---|
| 551 | X509 *recip;
|
---|
| 552 | cms = CMS_EnvelopedData_create(cipher);
|
---|
| 553 | if (!cms)
|
---|
| 554 | goto merr;
|
---|
| 555 | for (i = 0; i < sk_X509_num(certs); i++) {
|
---|
| 556 | recip = sk_X509_value(certs, i);
|
---|
| 557 | if (!CMS_add1_recipient_cert(cms, recip, flags)) {
|
---|
| 558 | CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
|
---|
| 559 | goto err;
|
---|
| 560 | }
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 | if (!(flags & CMS_DETACHED))
|
---|
| 564 | CMS_set_detached(cms, 0);
|
---|
| 565 |
|
---|
| 566 | if ((flags & (CMS_STREAM | CMS_PARTIAL))
|
---|
| 567 | || CMS_final(cms, data, NULL, flags))
|
---|
| 568 | return cms;
|
---|
| 569 | else
|
---|
| 570 | goto err;
|
---|
| 571 |
|
---|
| 572 | merr:
|
---|
| 573 | CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
|
---|
| 574 | err:
|
---|
| 575 | CMS_ContentInfo_free(cms);
|
---|
| 576 | return NULL;
|
---|
| 577 | }
|
---|
| 578 |
|
---|
| 579 | static int cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
|
---|
| 580 | EVP_PKEY *pk, X509 *cert)
|
---|
| 581 | {
|
---|
| 582 | int i;
|
---|
| 583 | STACK_OF(CMS_RecipientEncryptedKey) *reks;
|
---|
| 584 | CMS_RecipientEncryptedKey *rek;
|
---|
| 585 | reks = CMS_RecipientInfo_kari_get0_reks(ri);
|
---|
| 586 | if (!cert)
|
---|
| 587 | return 0;
|
---|
| 588 | for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
|
---|
| 589 | int rv;
|
---|
| 590 | rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
|
---|
| 591 | if (CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
|
---|
| 592 | continue;
|
---|
| 593 | CMS_RecipientInfo_kari_set0_pkey(ri, pk);
|
---|
| 594 | rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
|
---|
| 595 | CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
|
---|
| 596 | if (rv > 0)
|
---|
| 597 | return 1;
|
---|
| 598 | return -1;
|
---|
| 599 | }
|
---|
| 600 | return 0;
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 | int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
|
---|
| 604 | {
|
---|
| 605 | STACK_OF(CMS_RecipientInfo) *ris;
|
---|
| 606 | CMS_RecipientInfo *ri;
|
---|
| 607 | int i, r, ri_type;
|
---|
| 608 | int debug = 0, match_ri = 0;
|
---|
| 609 | ris = CMS_get0_RecipientInfos(cms);
|
---|
| 610 | if (ris)
|
---|
| 611 | debug = cms->d.envelopedData->encryptedContentInfo->debug;
|
---|
| 612 | ri_type = cms_pkey_get_ri_type(pk);
|
---|
| 613 | if (ri_type == CMS_RECIPINFO_NONE) {
|
---|
| 614 | CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
|
---|
| 615 | CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
|
---|
| 616 | return 0;
|
---|
| 617 | }
|
---|
| 618 |
|
---|
| 619 | for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
|
---|
| 620 | ri = sk_CMS_RecipientInfo_value(ris, i);
|
---|
| 621 | if (CMS_RecipientInfo_type(ri) != ri_type)
|
---|
| 622 | continue;
|
---|
| 623 | match_ri = 1;
|
---|
| 624 | if (ri_type == CMS_RECIPINFO_AGREE) {
|
---|
| 625 | r = cms_kari_set1_pkey(cms, ri, pk, cert);
|
---|
| 626 | if (r > 0)
|
---|
| 627 | return 1;
|
---|
| 628 | if (r < 0)
|
---|
| 629 | return 0;
|
---|
| 630 | }
|
---|
| 631 | /*
|
---|
| 632 | * If we have a cert try matching RecipientInfo otherwise try them
|
---|
| 633 | * all.
|
---|
| 634 | */
|
---|
| 635 | else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {
|
---|
| 636 | CMS_RecipientInfo_set0_pkey(ri, pk);
|
---|
| 637 | r = CMS_RecipientInfo_decrypt(cms, ri);
|
---|
| 638 | CMS_RecipientInfo_set0_pkey(ri, NULL);
|
---|
| 639 | if (cert) {
|
---|
| 640 | /*
|
---|
| 641 | * If not debugging clear any error and return success to
|
---|
| 642 | * avoid leaking of information useful to MMA
|
---|
| 643 | */
|
---|
| 644 | if (!debug) {
|
---|
| 645 | ERR_clear_error();
|
---|
| 646 | return 1;
|
---|
| 647 | }
|
---|
| 648 | if (r > 0)
|
---|
| 649 | return 1;
|
---|
| 650 | CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_DECRYPT_ERROR);
|
---|
| 651 | return 0;
|
---|
| 652 | }
|
---|
| 653 | /*
|
---|
| 654 | * If no cert and not debugging don't leave loop after first
|
---|
| 655 | * successful decrypt. Always attempt to decrypt all recipients
|
---|
| 656 | * to avoid leaking timing of a successful decrypt.
|
---|
| 657 | */
|
---|
| 658 | else if (r > 0 && debug)
|
---|
| 659 | return 1;
|
---|
| 660 | }
|
---|
| 661 | }
|
---|
| 662 | /* If no cert and not debugging always return success */
|
---|
| 663 | if (match_ri && !cert && !debug) {
|
---|
| 664 | ERR_clear_error();
|
---|
| 665 | return 1;
|
---|
| 666 | }
|
---|
| 667 |
|
---|
| 668 | CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
|
---|
| 669 | return 0;
|
---|
| 670 |
|
---|
| 671 | }
|
---|
| 672 |
|
---|
| 673 | int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
|
---|
| 674 | unsigned char *key, size_t keylen,
|
---|
| 675 | const unsigned char *id, size_t idlen)
|
---|
| 676 | {
|
---|
| 677 | STACK_OF(CMS_RecipientInfo) *ris;
|
---|
| 678 | CMS_RecipientInfo *ri;
|
---|
| 679 | int i, r;
|
---|
| 680 | ris = CMS_get0_RecipientInfos(cms);
|
---|
| 681 | for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
|
---|
| 682 | ri = sk_CMS_RecipientInfo_value(ris, i);
|
---|
| 683 | if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
|
---|
| 684 | continue;
|
---|
| 685 |
|
---|
| 686 | /*
|
---|
| 687 | * If we have an id try matching RecipientInfo otherwise try them
|
---|
| 688 | * all.
|
---|
| 689 | */
|
---|
| 690 | if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
|
---|
| 691 | CMS_RecipientInfo_set0_key(ri, key, keylen);
|
---|
| 692 | r = CMS_RecipientInfo_decrypt(cms, ri);
|
---|
| 693 | CMS_RecipientInfo_set0_key(ri, NULL, 0);
|
---|
| 694 | if (r > 0)
|
---|
| 695 | return 1;
|
---|
| 696 | if (id) {
|
---|
| 697 | CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_DECRYPT_ERROR);
|
---|
| 698 | return 0;
|
---|
| 699 | }
|
---|
| 700 | ERR_clear_error();
|
---|
| 701 | }
|
---|
| 702 | }
|
---|
| 703 |
|
---|
| 704 | CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
|
---|
| 705 | return 0;
|
---|
| 706 |
|
---|
| 707 | }
|
---|
| 708 |
|
---|
| 709 | int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
|
---|
| 710 | unsigned char *pass, ossl_ssize_t passlen)
|
---|
| 711 | {
|
---|
| 712 | STACK_OF(CMS_RecipientInfo) *ris;
|
---|
| 713 | CMS_RecipientInfo *ri;
|
---|
| 714 | int i, r;
|
---|
| 715 | ris = CMS_get0_RecipientInfos(cms);
|
---|
| 716 | for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
|
---|
| 717 | ri = sk_CMS_RecipientInfo_value(ris, i);
|
---|
| 718 | if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
|
---|
| 719 | continue;
|
---|
| 720 | CMS_RecipientInfo_set0_password(ri, pass, passlen);
|
---|
| 721 | r = CMS_RecipientInfo_decrypt(cms, ri);
|
---|
| 722 | CMS_RecipientInfo_set0_password(ri, NULL, 0);
|
---|
| 723 | if (r > 0)
|
---|
| 724 | return 1;
|
---|
| 725 | }
|
---|
| 726 |
|
---|
| 727 | CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
|
---|
| 728 | return 0;
|
---|
| 729 |
|
---|
| 730 | }
|
---|
| 731 |
|
---|
| 732 | int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
|
---|
| 733 | BIO *dcont, BIO *out, unsigned int flags)
|
---|
| 734 | {
|
---|
| 735 | int r;
|
---|
| 736 | BIO *cont;
|
---|
| 737 | if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
|
---|
| 738 | CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
|
---|
| 739 | return 0;
|
---|
| 740 | }
|
---|
| 741 | if (!dcont && !check_content(cms))
|
---|
| 742 | return 0;
|
---|
| 743 | if (flags & CMS_DEBUG_DECRYPT)
|
---|
| 744 | cms->d.envelopedData->encryptedContentInfo->debug = 1;
|
---|
| 745 | else
|
---|
| 746 | cms->d.envelopedData->encryptedContentInfo->debug = 0;
|
---|
| 747 | if (!pk && !cert && !dcont && !out)
|
---|
| 748 | return 1;
|
---|
| 749 | if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
|
---|
| 750 | return 0;
|
---|
| 751 | cont = CMS_dataInit(cms, dcont);
|
---|
| 752 | if (!cont)
|
---|
| 753 | return 0;
|
---|
| 754 | r = cms_copy_content(out, cont, flags);
|
---|
| 755 | do_free_upto(cont, dcont);
|
---|
| 756 | return r;
|
---|
| 757 | }
|
---|
| 758 |
|
---|
| 759 | int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
|
---|
| 760 | {
|
---|
| 761 | BIO *cmsbio;
|
---|
| 762 | int ret = 0;
|
---|
| 763 |
|
---|
| 764 | if ((cmsbio = CMS_dataInit(cms, dcont)) == NULL) {
|
---|
| 765 | CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_LIB);
|
---|
| 766 | return 0;
|
---|
| 767 | }
|
---|
| 768 |
|
---|
| 769 | SMIME_crlf_copy(data, cmsbio, flags);
|
---|
| 770 |
|
---|
| 771 | (void)BIO_flush(cmsbio);
|
---|
| 772 |
|
---|
| 773 | if (!CMS_dataFinal(cms, cmsbio)) {
|
---|
| 774 | CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
|
---|
| 775 | goto err;
|
---|
| 776 | }
|
---|
| 777 |
|
---|
| 778 | ret = 1;
|
---|
| 779 |
|
---|
| 780 | err:
|
---|
| 781 | do_free_upto(cmsbio, dcont);
|
---|
| 782 |
|
---|
| 783 | return ret;
|
---|
| 784 |
|
---|
| 785 | }
|
---|
| 786 |
|
---|
| 787 | #ifdef ZLIB
|
---|
| 788 |
|
---|
| 789 | int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
|
---|
| 790 | unsigned int flags)
|
---|
| 791 | {
|
---|
| 792 | BIO *cont;
|
---|
| 793 | int r;
|
---|
| 794 | if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
|
---|
| 795 | CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
|
---|
| 796 | return 0;
|
---|
| 797 | }
|
---|
| 798 |
|
---|
| 799 | if (!dcont && !check_content(cms))
|
---|
| 800 | return 0;
|
---|
| 801 |
|
---|
| 802 | cont = CMS_dataInit(cms, dcont);
|
---|
| 803 | if (!cont)
|
---|
| 804 | return 0;
|
---|
| 805 | r = cms_copy_content(out, cont, flags);
|
---|
| 806 | do_free_upto(cont, dcont);
|
---|
| 807 | return r;
|
---|
| 808 | }
|
---|
| 809 |
|
---|
| 810 | CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
|
---|
| 811 | {
|
---|
| 812 | CMS_ContentInfo *cms;
|
---|
| 813 | if (comp_nid <= 0)
|
---|
| 814 | comp_nid = NID_zlib_compression;
|
---|
| 815 | cms = cms_CompressedData_create(comp_nid);
|
---|
| 816 | if (!cms)
|
---|
| 817 | return NULL;
|
---|
| 818 |
|
---|
| 819 | if (!(flags & CMS_DETACHED))
|
---|
| 820 | CMS_set_detached(cms, 0);
|
---|
| 821 |
|
---|
| 822 | if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
|
---|
| 823 | return cms;
|
---|
| 824 |
|
---|
| 825 | CMS_ContentInfo_free(cms);
|
---|
| 826 | return NULL;
|
---|
| 827 | }
|
---|
| 828 |
|
---|
| 829 | #else
|
---|
| 830 |
|
---|
| 831 | int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
|
---|
| 832 | unsigned int flags)
|
---|
| 833 | {
|
---|
| 834 | CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
|
---|
| 835 | return 0;
|
---|
| 836 | }
|
---|
| 837 |
|
---|
| 838 | CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
|
---|
| 839 | {
|
---|
| 840 | CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
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| 841 | return NULL;
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| 842 | }
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| 843 |
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| 844 | #endif
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