--- /dev/null
+/* crypto/cms/cms_lib.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project.
+ */
+/* ====================================================================
+ * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ */
+
+#include <openssl/asn1t.h>
+#include <openssl/x509.h>
+#include <openssl/err.h>
+#include <openssl/pem.h>
+#include <openssl/bio.h>
+#include <openssl/asn1.h>
+#include "cms.h"
+#include "cms_lcl.h"
+
+IMPLEMENT_ASN1_FUNCTIONS(CMS_ContentInfo)
+IMPLEMENT_ASN1_PRINT_FUNCTION(CMS_ContentInfo)
+
+DECLARE_ASN1_ITEM(CMS_CertificateChoices)
+DECLARE_ASN1_ITEM(CMS_RevocationInfoChoice)
+DECLARE_STACK_OF(CMS_CertificateChoices)
+DECLARE_STACK_OF(CMS_RevocationInfoChoice)
+
+const ASN1_OBJECT *CMS_get0_type(CMS_ContentInfo *cms)
+ {
+ return cms->contentType;
+ }
+
+CMS_ContentInfo *cms_Data_create(void)
+ {
+ CMS_ContentInfo *cms;
+ cms = CMS_ContentInfo_new();
+ if (cms)
+ {
+ cms->contentType = OBJ_nid2obj(NID_pkcs7_data);
+ /* Never detached */
+ CMS_set_detached(cms, 0);
+ }
+ return cms;
+ }
+
+BIO *cms_content_bio(CMS_ContentInfo *cms)
+ {
+ ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
+ if (!pos)
+ return NULL;
+ /* If content detached data goes nowhere: create NULL BIO */
+ if (!*pos)
+ return BIO_new(BIO_s_null());
+ /* If content not detached and created return memory BIO
+ */
+ if (!*pos || ((*pos)->flags == ASN1_STRING_FLAG_CONT))
+ return BIO_new(BIO_s_mem());
+ /* Else content was read in: return read only BIO for it */
+ return BIO_new_mem_buf((*pos)->data, (*pos)->length);
+ }
+
+BIO *CMS_dataInit(CMS_ContentInfo *cms, BIO *icont)
+ {
+ BIO *cmsbio, *cont;
+ if (icont)
+ cont = icont;
+ else
+ cont = cms_content_bio(cms);
+ if (!cont)
+ {
+ CMSerr(CMS_F_CMS_DATAINIT, CMS_R_NO_CONTENT);
+ return NULL;
+ }
+ switch (OBJ_obj2nid(cms->contentType))
+ {
+
+ case NID_pkcs7_data:
+ return cont;
+
+ case NID_pkcs7_signed:
+ cmsbio = cms_SignedData_init_bio(cms);
+ break;
+
+ case NID_pkcs7_digest:
+ cmsbio = cms_DigestedData_init_bio(cms);
+ break;
+#ifdef ZLIB
+ case NID_id_smime_ct_compressedData:
+ cmsbio = cms_CompressedData_init_bio(cms);
+ break;
+#endif
+
+ case NID_pkcs7_encrypted:
+ cmsbio = cms_EncryptedData_init_bio(cms);
+ break;
+
+ case NID_pkcs7_enveloped:
+ cmsbio = cms_EnvelopedData_init_bio(cms);
+ break;
+
+ default:
+ CMSerr(CMS_F_CMS_DATAINIT, CMS_R_UNSUPPORTED_TYPE);
+ return NULL;
+ }
+
+ if (cmsbio)
+ return BIO_push(cmsbio, cont);
+
+ if (!icont)
+ BIO_free(cont);
+ return NULL;
+
+ }
+
+int CMS_dataFinal(CMS_ContentInfo *cms, BIO *cmsbio)
+ {
+ ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
+ if (!pos)
+ return 0;
+ /* If ebmedded content find memory BIO and set content */
+ if (*pos && ((*pos)->flags & ASN1_STRING_FLAG_CONT))
+ {
+ BIO *mbio;
+ unsigned char *cont;
+ long contlen;
+ mbio = BIO_find_type(cmsbio, BIO_TYPE_MEM);
+ if (!mbio)
+ {
+ CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_CONTENT_NOT_FOUND);
+ return 0;
+ }
+ contlen = BIO_get_mem_data(mbio, &cont);
+ /* Set bio as read only so its content can't be clobbered */
+ BIO_set_flags(mbio, BIO_FLAGS_MEM_RDONLY);
+ BIO_set_mem_eof_return(mbio, 0);
+ ASN1_STRING_set0(*pos, cont, contlen);
+ (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
+ }
+
+ switch (OBJ_obj2nid(cms->contentType))
+ {
+
+ case NID_pkcs7_data:
+ case NID_pkcs7_enveloped:
+ case NID_pkcs7_encrypted:
+ case NID_id_smime_ct_compressedData:
+ /* Nothing to do */
+ return 1;
+
+ case NID_pkcs7_signed:
+ return cms_SignedData_final(cms, cmsbio);
+
+ case NID_pkcs7_digest:
+ return cms_DigestedData_do_final(cms, cmsbio, 0);
+
+ default:
+ CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_UNSUPPORTED_TYPE);
+ return 0;
+ }
+ }
+
+/* Return an OCTET STRING pointer to content. This allows it to
+ * be accessed or set later.
+ */
+
+ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
+ {
+ switch (OBJ_obj2nid(cms->contentType))
+ {
+
+ case NID_pkcs7_data:
+ return &cms->d.data;
+
+ case NID_pkcs7_signed:
+ return &cms->d.signedData->encapContentInfo->eContent;
+
+ case NID_pkcs7_enveloped:
+ return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
+
+ case NID_pkcs7_digest:
+ return &cms->d.digestedData->encapContentInfo->eContent;
+
+ case NID_pkcs7_encrypted:
+ return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
+
+ case NID_id_smime_ct_authData:
+ return &cms->d.authenticatedData->encapContentInfo->eContent;
+
+ case NID_id_smime_ct_compressedData:
+ return &cms->d.compressedData->encapContentInfo->eContent;
+
+ default:
+ if (cms->d.other->type == V_ASN1_OCTET_STRING)
+ return &cms->d.other->value.octet_string;
+ CMSerr(CMS_F_CMS_GET0_CONTENT, CMS_R_UNSUPPORTED_CONTENT_TYPE);
+ return NULL;
+
+ }
+ }
+
+/* Return an ASN1_OBJECT pointer to content type. This allows it to
+ * be accessed or set later.
+ */
+
+static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
+ {
+ switch (OBJ_obj2nid(cms->contentType))
+ {
+
+ case NID_pkcs7_signed:
+ return &cms->d.signedData->encapContentInfo->eContentType;
+
+ case NID_pkcs7_enveloped:
+ return &cms->d.envelopedData->encryptedContentInfo->contentType;
+
+ case NID_pkcs7_digest:
+ return &cms->d.digestedData->encapContentInfo->eContentType;
+
+ case NID_pkcs7_encrypted:
+ return &cms->d.encryptedData->encryptedContentInfo->contentType;
+
+ case NID_id_smime_ct_authData:
+ return &cms->d.authenticatedData->encapContentInfo->eContentType;
+
+ case NID_id_smime_ct_compressedData:
+ return &cms->d.compressedData->encapContentInfo->eContentType;
+
+ default:
+ CMSerr(CMS_F_CMS_GET0_ECONTENT_TYPE,
+ CMS_R_UNSUPPORTED_CONTENT_TYPE);
+ return NULL;
+
+ }
+ }
+
+const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
+ {
+ ASN1_OBJECT **petype;
+ petype = cms_get0_econtent_type(cms);
+ if (petype)
+ return *petype;
+ return NULL;
+ }
+
+int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
+ {
+ ASN1_OBJECT **petype, *etype;
+ petype = cms_get0_econtent_type(cms);
+ if (!petype)
+ return 0;
+ if (!oid)
+ return 1;
+ etype = OBJ_dup(oid);
+ if (!etype)
+ return 0;
+ ASN1_OBJECT_free(*petype);
+ *petype = etype;
+ return 1;
+ }
+
+int CMS_is_detached(CMS_ContentInfo *cms)
+ {
+ ASN1_OCTET_STRING **pos;
+ pos = CMS_get0_content(cms);
+ if (!pos)
+ return -1;
+ if (*pos)
+ return 0;
+ return 1;
+ }
+
+int CMS_set_detached(CMS_ContentInfo *cms, int detached)
+ {
+ ASN1_OCTET_STRING **pos;
+ pos = CMS_get0_content(cms);
+ if (!pos)
+ return 0;
+ if (detached)
+ {
+ if (*pos)
+ {
+ ASN1_OCTET_STRING_free(*pos);
+ *pos = NULL;
+ }
+ return 1;
+ }
+ if (!*pos)
+ *pos = ASN1_OCTET_STRING_new();
+ if (*pos)
+ {
+ /* NB: special flag to show content is created and not
+ * read in.
+ */
+ (*pos)->flags |= ASN1_STRING_FLAG_CONT;
+ return 1;
+ }
+ CMSerr(CMS_F_CMS_SET_DETACHED, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+/* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
+
+void cms_DigestAlgorithm_set(X509_ALGOR *alg, const EVP_MD *md)
+ {
+ int param_type;
+
+ if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
+ param_type = V_ASN1_UNDEF;
+ else
+ param_type = V_ASN1_NULL;
+
+ X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
+
+ }
+
+/* Create a digest BIO from an X509_ALGOR structure */
+
+BIO *cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm)
+ {
+ BIO *mdbio = NULL;
+ ASN1_OBJECT *digestoid;
+ const EVP_MD *digest;
+ X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
+ digest = EVP_get_digestbyobj(digestoid);
+ if (!digest)
+ {
+ CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
+ CMS_R_UNKNOWN_DIGEST_ALGORIHM);
+ goto err;
+ }
+ mdbio = BIO_new(BIO_f_md());
+ if (!mdbio || !BIO_set_md(mdbio, digest))
+ {
+ CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
+ CMS_R_MD_BIO_INIT_ERROR);
+ goto err;
+ }
+ return mdbio;
+ err:
+ if (mdbio)
+ BIO_free(mdbio);
+ return NULL;
+ }
+
+/* Locate a message digest content from a BIO chain based on SignerInfo */
+
+int cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
+ X509_ALGOR *mdalg)
+ {
+ int nid;
+ ASN1_OBJECT *mdoid;
+ X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
+ nid = OBJ_obj2nid(mdoid);
+ /* Look for digest type to match signature */
+ for (;;)
+ {
+ EVP_MD_CTX *mtmp;
+ chain = BIO_find_type(chain, BIO_TYPE_MD);
+ if (chain == NULL)
+ {
+ CMSerr(CMS_F_CMS_DIGESTALGORITHM_FIND_CTX,
+ CMS_R_NO_MATCHING_DIGEST);
+ return 0;
+ }
+ BIO_get_md_ctx(chain, &mtmp);
+ if (EVP_MD_CTX_type(mtmp) == nid
+ /* Workaround for broken implementations that use signature
+ * algorithm OID instead of digest.
+ */
+ || EVP_MD_pkey_type(EVP_MD_CTX_md(mtmp)) == nid)
+ return EVP_MD_CTX_copy_ex(mctx, mtmp);
+ chain = BIO_next(chain);
+ }
+ }
+
+static STACK_OF(CMS_CertificateChoices) **cms_get0_certificate_choices(CMS_ContentInfo *cms)
+ {
+ switch (OBJ_obj2nid(cms->contentType))
+ {
+
+ case NID_pkcs7_signed:
+ return &cms->d.signedData->certificates;
+
+ case NID_pkcs7_enveloped:
+ return &cms->d.envelopedData->originatorInfo->certificates;
+
+ default:
+ CMSerr(CMS_F_CMS_GET0_CERTIFICATE_CHOICES,
+ CMS_R_UNSUPPORTED_CONTENT_TYPE);
+ return NULL;
+
+ }
+ }
+
+CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
+ {
+ STACK_OF(CMS_CertificateChoices) **pcerts;
+ CMS_CertificateChoices *cch;
+ pcerts = cms_get0_certificate_choices(cms);
+ if (!pcerts)
+ return NULL;
+ if (!*pcerts)
+ *pcerts = sk_CMS_CertificateChoices_new_null();
+ if (!*pcerts)
+ return NULL;
+ cch = M_ASN1_new_of(CMS_CertificateChoices);
+ if (!cch)
+ return NULL;
+ if (!sk_CMS_CertificateChoices_push(*pcerts, cch))
+ {
+ M_ASN1_free_of(cch, CMS_CertificateChoices);
+ return NULL;
+ }
+ return cch;
+ }
+
+int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
+ {
+ CMS_CertificateChoices *cch;
+ STACK_OF(CMS_CertificateChoices) **pcerts;
+ int i;
+ pcerts = cms_get0_certificate_choices(cms);
+ if (!pcerts)
+ return 0;
+ for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
+ {
+ cch = sk_CMS_CertificateChoices_value(*pcerts, i);
+ if (cch->type == CMS_CERTCHOICE_CERT)
+ {
+ if (!X509_cmp(cch->d.certificate, cert))
+ {
+ CMSerr(CMS_F_CMS_ADD0_CERT,
+ CMS_R_CERTIFICATE_ALREADY_PRESENT);
+ return 0;
+ }
+ }
+ }
+ cch = CMS_add0_CertificateChoices(cms);
+ if (!cch)
+ return 0;
+ cch->type = CMS_CERTCHOICE_CERT;
+ cch->d.certificate = cert;
+ return 1;
+ }
+
+int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
+ {
+ int r;
+ r = CMS_add0_cert(cms, cert);
+ if (r > 0)
+ CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
+ return r;
+ }
+
+static STACK_OF(CMS_RevocationInfoChoice) **cms_get0_revocation_choices(CMS_ContentInfo *cms)
+ {
+ switch (OBJ_obj2nid(cms->contentType))
+ {
+
+ case NID_pkcs7_signed:
+ return &cms->d.signedData->crls;
+
+ case NID_pkcs7_enveloped:
+ return &cms->d.envelopedData->originatorInfo->crls;
+
+ default:
+ CMSerr(CMS_F_CMS_GET0_REVOCATION_CHOICES,
+ CMS_R_UNSUPPORTED_CONTENT_TYPE);
+ return NULL;
+
+ }
+ }
+
+CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
+ {
+ STACK_OF(CMS_RevocationInfoChoice) **pcrls;
+ CMS_RevocationInfoChoice *rch;
+ pcrls = cms_get0_revocation_choices(cms);
+ if (!pcrls)
+ return NULL;
+ if (!*pcrls)
+ *pcrls = sk_CMS_RevocationInfoChoice_new_null();
+ if (!*pcrls)
+ return NULL;
+ rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
+ if (!rch)
+ return NULL;
+ if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch))
+ {
+ M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
+ return NULL;
+ }
+ return rch;
+ }
+
+int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
+ {
+ CMS_RevocationInfoChoice *rch;
+ rch = CMS_add0_RevocationInfoChoice(cms);
+ if (!rch)
+ return 0;
+ rch->type = CMS_REVCHOICE_CRL;
+ rch->d.crl = crl;
+ return 1;
+ }
+
+int CMS_add1_crl(CMS_ContentInfo *cms, X509_CRL *crl)
+ {
+ int r;
+ r = CMS_add0_crl(cms, crl);
+ if (r > 0)
+ CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509_CRL);
+ return r;
+ }
+
+STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
+ {
+ STACK_OF(X509) *certs = NULL;
+ CMS_CertificateChoices *cch;
+ STACK_OF(CMS_CertificateChoices) **pcerts;
+ int i;
+ pcerts = cms_get0_certificate_choices(cms);
+ if (!pcerts)
+ return NULL;
+ for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
+ {
+ cch = sk_CMS_CertificateChoices_value(*pcerts, i);
+ if (cch->type == 0)
+ {
+ if (!certs)
+ {
+ certs = sk_X509_new_null();
+ if (!certs)
+ return NULL;
+ }
+ if (!sk_X509_push(certs, cch->d.certificate))
+ {
+ sk_X509_pop_free(certs, X509_free);
+ return NULL;
+ }
+ CRYPTO_add(&cch->d.certificate->references,
+ 1, CRYPTO_LOCK_X509);
+ }
+ }
+ return certs;
+
+ }
+
+STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
+ {
+ STACK_OF(X509_CRL) *crls = NULL;
+ STACK_OF(CMS_RevocationInfoChoice) **pcrls;
+ CMS_RevocationInfoChoice *rch;
+ int i;
+ pcrls = cms_get0_revocation_choices(cms);
+ if (!pcrls)
+ return NULL;
+ for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++)
+ {
+ rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
+ if (rch->type == 0)
+ {
+ if (!crls)
+ {
+ crls = sk_X509_CRL_new_null();
+ if (!crls)
+ return NULL;
+ }
+ if (!sk_X509_CRL_push(crls, rch->d.crl))
+ {
+ sk_X509_CRL_pop_free(crls, X509_CRL_free);
+ return NULL;
+ }
+ CRYPTO_add(&rch->d.crl->references,
+ 1, CRYPTO_LOCK_X509_CRL);
+ }
+ }
+ return crls;
+ }
projects / cassiopeia.git / blobdiff