Add m-esr52 at 52.6.0

1 files changed, 183 insertions, 0 deletions

diff --git a/security/nss/lib/smime/smimemessage.c b/security/nss/lib/smime/smimemessage.c
new file mode 100644
index 000000000..774b9f3fd
--- /dev/null
+++ b/security/nss/lib/smime/smimemessage.c
@@ -0,0 +1,183 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * SMIME message methods
+ */
+
+#include "cmslocal.h"
+#include "smime.h"
+
+#include "cert.h"
+#include "key.h"
+#include "secasn1.h"
+#include "secitem.h"
+#include "secoid.h"
+#include "pk11func.h"
+#include "prtime.h"
+#include "secerr.h"
+
+#if 0
+/*
+ * NSS_SMIMEMessage_CreateEncrypted - start an S/MIME encrypting context.
+ *
+ * "scert" is the cert for the sender.  It will be checked for validity.
+ * "rcerts" are the certs for the recipients.  They will also be checked.
+ *
+ * "certdb" is the cert database to use for verifying the certs.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * This function already does all of the stuff specific to S/MIME protocol
+ * and local policy; the return value just needs to be passed to
+ * SEC_PKCS7Encode() or to SEC_PKCS7EncoderStart() to create the encoded data,
+ * and finally to SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+NSSCMSMessage *
+NSS_SMIMEMessage_CreateEncrypted(CERTCertificate *scert,
+                        CERTCertificate **rcerts,
+                        CERTCertDBHandle *certdb,
+                        PK11PasswordFunc pwfn,
+                        void *pwfn_arg)
+{
+    NSSCMSMessage *cmsg;
+    long cipher;
+    SECOidTag encalg;
+    int keysize;
+    int mapi, rci;
+
+    cipher = smime_choose_cipher (scert, rcerts);
+    if (cipher < 0)
+        return NULL;
+
+    mapi = smime_mapi_by_cipher (cipher);
+    if (mapi < 0)
+        return NULL;
+
+    /*
+     * XXX This is stretching it -- CreateEnvelopedData should probably
+     * take a cipher itself of some sort, because we cannot know what the
+     * future will bring in terms of parameters for each type of algorithm.
+     * For example, just an algorithm and keysize is *not* sufficient to
+     * fully specify the usage of RC5 (which also needs to know rounds and
+     * block size).  Work this out into a better API!
+     */
+    encalg = smime_cipher_map[mapi].algtag;
+    keysize = smime_keysize_by_cipher (cipher);
+    if (keysize < 0)
+        return NULL;
+
+    cinfo = SEC_PKCS7CreateEnvelopedData (scert, certUsageEmailRecipient,
+                                          certdb, encalg, keysize,
+                                          pwfn, pwfn_arg);
+    if (cinfo == NULL)
+        return NULL;
+
+    for (rci = 0; rcerts[rci] != NULL; rci++) {
+        if (rcerts[rci] == scert)
+            continue;
+        if (SEC_PKCS7AddRecipient (cinfo, rcerts[rci], certUsageEmailRecipient,
+                                   NULL) != SECSuccess) {
+            SEC_PKCS7DestroyContentInfo (cinfo);
+            return NULL;
+        }
+    }
+
+    return cinfo;
+}
+
+
+/*
+ * Start an S/MIME signing context.
+ *
+ * "scert" is the cert that will be used to sign the data.  It will be
+ * checked for validity.
+ *
+ * "ecert" is the signer's encryption cert.  If it is different from
+ * scert, then it will be included in the signed message so that the
+ * recipient can save it for future encryptions.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * "digestalg" names the digest algorithm (e.g. SEC_OID_SHA1).
+ * XXX There should be SECMIME functions for hashing, or the hashing should
+ * be built into this interface, which we would like because we would
+ * support more smartcards that way, and then this argument should go away.)
+ *
+ * "digest" is the actual digest of the data.  It must be provided in
+ * the case of detached data or NULL if the content will be included.
+ *
+ * This function already does all of the stuff specific to S/MIME protocol
+ * and local policy; the return value just needs to be passed to
+ * SEC_PKCS7Encode() or to SEC_PKCS7EncoderStart() to create the encoded data,
+ * and finally to SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+
+NSSCMSMessage *
+NSS_SMIMEMessage_CreateSigned(CERTCertificate *scert,
+                      CERTCertificate *ecert,
+                      CERTCertDBHandle *certdb,
+                      SECOidTag digestalgtag,
+                      SECItem *digest,
+                      PK11PasswordFunc pwfn,
+                      void *pwfn_arg)
+{
+    NSSCMSMessage *cmsg;
+    NSSCMSSignedData *sigd;
+    NSSCMSSignerInfo *signerinfo;
+
+    /* See note in header comment above about digestalg. */
+    /* Doesn't explain this.  PORT_Assert (digestalgtag == SEC_OID_SHA1); */
+
+    cmsg = NSS_CMSMessage_Create(NULL);
+    if (cmsg == NULL)
+        return NULL;
+
+    sigd = NSS_CMSSignedData_Create(cmsg);
+    if (sigd == NULL)
+        goto loser;
+
+    /* create just one signerinfo */
+    signerinfo = NSS_CMSSignerInfo_Create(cmsg, scert, digestalgtag);
+    if (signerinfo == NULL)
+        goto loser;
+
+    /* Add the signing time to the signerinfo.  */
+    if (NSS_CMSSignerInfo_AddSigningTime(signerinfo, PR_Now()) != SECSuccess)
+        goto loser;
+
+    /* and add the SMIME profile */
+    if (NSS_SMIMESignerInfo_AddSMIMEProfile(signerinfo, scert) != SECSuccess)
+        goto loser;
+
+    /* now add the signerinfo to the signeddata */
+    if (NSS_CMSSignedData_AddSignerInfo(sigd, signerinfo) != SECSuccess)
+        goto loser;
+
+    /* include the signing cert and its entire chain */
+    /* note that there are no checks for duplicate certs in place, as all the */
+    /* essential data structures (like set of certificate) are not there */
+    if (NSS_CMSSignedData_AddCertChain(sigd, scert) != SECSuccess)
+        goto loser;
+
+    /* If the encryption cert and the signing cert differ, then include
+     * the encryption cert too. */
+    if ( ( ecert != NULL ) && ( ecert != scert ) ) {
+        if (NSS_CMSSignedData_AddCertificate(sigd, ecert) != SECSuccess)
+            goto loser;
+    }
+
+    return cmsg;
+loser:
+    if (cmsg)
+        NSS_CMSMessage_Destroy(cmsg);
+    return NULL;
+}
+#endif