1 files changed, 99 insertions, 0 deletions

diff --git a/src/lib/libcrypto/cms/cms_dd.c b/src/lib/libcrypto/cms/cms_dd.c
new file mode 100644
index 0000000000..5da6802fcd
--- /dev/null
+++ b/src/lib/libcrypto/cms/cms_dd.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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 "internal/cryptlib.h"
+#include <openssl/asn1t.h>
+#include <openssl/pem.h>
+#include <openssl/x509v3.h>
+#include <openssl/err.h>
+#include <openssl/cms.h>
+#include "cms_lcl.h"
+
+/* CMS DigestedData Utilities */
+
+CMS_ContentInfo *cms_DigestedData_create(const EVP_MD *md)
+{
+    CMS_ContentInfo *cms;
+    CMS_DigestedData *dd;
+    cms = CMS_ContentInfo_new();
+    if (cms == NULL)
+        return NULL;
+
+    dd = M_ASN1_new_of(CMS_DigestedData);
+
+    if (dd == NULL)
+        goto err;
+
+    cms->contentType = OBJ_nid2obj(NID_pkcs7_digest);
+    cms->d.digestedData = dd;
+
+    dd->version = 0;
+    dd->encapContentInfo->eContentType = OBJ_nid2obj(NID_pkcs7_data);
+
+    X509_ALGOR_set_md(dd->digestAlgorithm, md);
+
+    return cms;
+
+ err:
+    CMS_ContentInfo_free(cms);
+    return NULL;
+}
+
+BIO *cms_DigestedData_init_bio(CMS_ContentInfo *cms)
+{
+    CMS_DigestedData *dd;
+    dd = cms->d.digestedData;
+    return cms_DigestAlgorithm_init_bio(dd->digestAlgorithm);
+}
+
+int cms_DigestedData_do_final(CMS_ContentInfo *cms, BIO *chain, int verify)
+{
+    EVP_MD_CTX *mctx = EVP_MD_CTX_new();
+    unsigned char md[EVP_MAX_MD_SIZE];
+    unsigned int mdlen;
+    int r = 0;
+    CMS_DigestedData *dd;
+
+    if (mctx == NULL) {
+        CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    dd = cms->d.digestedData;
+
+    if (!cms_DigestAlgorithm_find_ctx(mctx, chain, dd->digestAlgorithm))
+        goto err;
+
+    if (EVP_DigestFinal_ex(mctx, md, &mdlen) <= 0)
+        goto err;
+
+    if (verify) {
+        if (mdlen != (unsigned int)dd->digest->length) {
+            CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
+                   CMS_R_MESSAGEDIGEST_WRONG_LENGTH);
+            goto err;
+        }
+
+        if (memcmp(md, dd->digest->data, mdlen))
+            CMSerr(CMS_F_CMS_DIGESTEDDATA_DO_FINAL,
+                   CMS_R_VERIFICATION_FAILURE);
+        else
+            r = 1;
+    } else {
+        if (!ASN1_STRING_set(dd->digest, md, mdlen))
+            goto err;
+        r = 1;
+    }
+
+ err:
+    EVP_MD_CTX_free(mctx);
+
+    return r;
+
+}