--- /dev/null
+/*
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is the Netscape security libraries.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation. Portions created by Netscape are
+ * Copyright (C) 1994-2000 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License Version 2 or later (the
+ * "GPL"), in which case the provisions of the GPL are applicable
+ * instead of those above. If you wish to allow use of your
+ * version of this file only under the terms of the GPL and not to
+ * allow others to use your version of this file under the MPL,
+ * indicate your decision by deleting the provisions above and
+ * replace them with the notice and other provisions required by
+ * the GPL. If you do not delete the provisions above, a recipient
+ * may use your version of this file under either the MPL or the
+ * GPL.
+ */
+
+/*
+ * CMS encoding.
+ */
+
+#include <Security/SecCmsEncoder.h>
+#include <Security/SecCmsContentInfo.h>
+#include <Security/SecCmsDigestContext.h>
+#include <Security/SecCmsMessage.h>
+
+#include "cmslocal.h"
+
+#include "secoid.h"
+#include "secitem.h"
+
+#include <security_asn1/secasn1.h>
+#include <security_asn1/secerr.h>
+#include <CoreServices/../Frameworks/CarbonCore.framework/Headers/MacErrors.h>
+
+struct nss_cms_encoder_output {
+ SecCmsContentCallback outputfn;
+ void *outputarg;
+ PLArenaPool *destpoolp;
+ CSSM_DATA_PTR dest;
+};
+
+struct SecCmsEncoderStr {
+ SEC_ASN1EncoderContext * ecx; /* ASN.1 encoder context */
+ Boolean ecxupdated; /* true if data was handed in */
+ SecCmsMessageRef cmsg; /* pointer to the root message */
+ SECOidTag type; /* type tag of the current content */
+ SecCmsContent content; /* pointer to current content */
+ struct nss_cms_encoder_output output; /* output function */
+ int error; /* error code */
+ SecCmsEncoderRef childp7ecx; /* link to child encoder context */
+};
+
+static OSStatus nss_cms_before_data(SecCmsEncoderRef p7ecx);
+static OSStatus nss_cms_after_data(SecCmsEncoderRef p7ecx);
+static OSStatus nss_cms_encoder_update(SecCmsEncoderRef p7ecx, const char *data, size_t len);
+static OSStatus nss_cms_encoder_work_data(SecCmsEncoderRef p7ecx, CSSM_DATA_PTR dest,
+ const unsigned char *data, size_t len,
+ Boolean final, Boolean innermost);
+
+extern const SecAsn1Template SecCmsMessageTemplate[];
+
+/*
+ * The little output function that the ASN.1 encoder calls to hand
+ * us bytes which we in turn hand back to our caller (via the callback
+ * they gave us).
+ */
+static void
+nss_cms_encoder_out(void *arg, const char *buf, size_t len,
+ int depth, SEC_ASN1EncodingPart data_kind)
+{
+ struct nss_cms_encoder_output *output = (struct nss_cms_encoder_output *)arg;
+ unsigned char *dest;
+ CSSM_SIZE offset;
+
+#ifdef CMSDEBUG
+ int i;
+
+ fprintf(stderr, "kind = %d, depth = %d, len = %lu\n", data_kind, depth, len);
+ for (i=0; i < len; i++) {
+ fprintf(stderr, " %02x%s", (unsigned int)buf[i] & 0xff, ((i % 16) == 15) ? "\n" : "");
+ }
+ if ((i % 16) != 0)
+ fprintf(stderr, "\n");
+#endif
+
+ if (output->outputfn != NULL)
+ /* call output callback with DER data */
+ output->outputfn(output->outputarg, buf, len);
+
+ if (output->dest != NULL) {
+ /* store DER data in CSSM_DATA */
+ offset = output->dest->Length;
+ if (offset == 0) {
+ dest = (unsigned char *)PORT_ArenaAlloc(output->destpoolp, len);
+ } else {
+ dest = (unsigned char *)PORT_ArenaGrow(output->destpoolp,
+ output->dest->Data,
+ output->dest->Length,
+ output->dest->Length + len);
+ }
+ if (dest == NULL)
+ /* oops */
+ return;
+
+ output->dest->Data = dest;
+ output->dest->Length += len;
+
+ /* copy it in */
+ PORT_Memcpy(output->dest->Data + offset, buf, len);
+ }
+}
+
+/*
+ * nss_cms_encoder_notify - ASN.1 encoder callback
+ *
+ * this function is called by the ASN.1 encoder before and after the encoding of
+ * every object. here, it is used to keep track of data structures, set up
+ * encryption and/or digesting and possibly set up child encoders.
+ */
+static void
+nss_cms_encoder_notify(void *arg, Boolean before, void *dest, int depth)
+{
+ SecCmsEncoderRef p7ecx;
+ SecCmsContentInfoRef rootcinfo, cinfo;
+ Boolean after = !before;
+ PLArenaPool *poolp;
+ SECOidTag childtype;
+ CSSM_DATA_PTR item;
+
+ p7ecx = (SecCmsEncoderRef)arg;
+ PORT_Assert(p7ecx != NULL);
+
+ rootcinfo = &(p7ecx->cmsg->contentInfo);
+ poolp = p7ecx->cmsg->poolp;
+
+#ifdef CMSDEBUG
+ fprintf(stderr, "%6.6s, dest = %p, depth = %d\n", before ? "before" : "after", dest, depth);
+#endif
+
+ /*
+ * Watch for the content field, at which point we want to instruct
+ * the ASN.1 encoder to start taking bytes from the buffer.
+ */
+ switch (p7ecx->type) {
+ default:
+ case SEC_OID_UNKNOWN:
+ /* we're still in the root message */
+ if (after && dest == &(rootcinfo->contentType)) {
+ /* got the content type OID now - so find out the type tag */
+ p7ecx->type = SecCmsContentInfoGetContentTypeTag(rootcinfo);
+ /* set up a pointer to our current content */
+ p7ecx->content = rootcinfo->content;
+ }
+ break;
+
+ case SEC_OID_PKCS7_DATA:
+ case SEC_OID_OTHER:
+ if (before && dest == &(rootcinfo->rawContent)) {
+ /* just set up encoder to grab from user - no encryption or digesting */
+ if ((item = rootcinfo->content.data) != NULL)
+ (void)nss_cms_encoder_work_data(p7ecx, NULL, item->Data, item->Length, PR_TRUE, PR_TRUE);
+ else
+ SEC_ASN1EncoderSetTakeFromBuf(p7ecx->ecx);
+ SEC_ASN1EncoderClearNotifyProc(p7ecx->ecx); /* no need to get notified anymore */
+ }
+ break;
+
+ case SEC_OID_PKCS7_SIGNED_DATA:
+ case SEC_OID_PKCS7_ENVELOPED_DATA:
+ case SEC_OID_PKCS7_DIGESTED_DATA:
+ case SEC_OID_PKCS7_ENCRYPTED_DATA:
+
+ /* when we know what the content is, we encode happily until we reach the inner content */
+ cinfo = SecCmsContentGetContentInfo(p7ecx->content.pointer, p7ecx->type);
+ childtype = SecCmsContentInfoGetContentTypeTag(cinfo);
+
+ if (after && dest == &(cinfo->contentType)) {
+ /* we're right before encoding the data (if we have some or not) */
+ /* (for encrypted data, we're right before the contentEncAlg which may change */
+ /* in nss_cms_before_data because of IV calculation when setting up encryption) */
+ if (nss_cms_before_data(p7ecx) != SECSuccess)
+ p7ecx->error = PORT_GetError();
+ }
+ if (before && dest == &(cinfo->rawContent)) {
+ if ( ((childtype == SEC_OID_PKCS7_DATA) || (childtype == SEC_OID_OTHER)) &&
+ ((item = cinfo->content.data) != NULL))
+ /* we have data - feed it in */
+ (void)nss_cms_encoder_work_data(p7ecx, NULL, item->Data, item->Length, PR_TRUE, PR_TRUE);
+ else
+ /* else try to get it from user */
+ SEC_ASN1EncoderSetTakeFromBuf(p7ecx->ecx);
+ }
+ if (after && dest == &(cinfo->rawContent)) {
+ if (nss_cms_after_data(p7ecx) != SECSuccess)
+ p7ecx->error = PORT_GetError();
+ SEC_ASN1EncoderClearNotifyProc(p7ecx->ecx); /* no need to get notified anymore */
+ }
+ break;
+ }
+}
+
+/*
+ * nss_cms_before_data - setup the current encoder to receive data
+ */
+static OSStatus
+nss_cms_before_data(SecCmsEncoderRef p7ecx)
+{
+ OSStatus rv;
+ SECOidTag childtype;
+ SecCmsContentInfoRef cinfo;
+ PLArenaPool *poolp;
+ SecCmsEncoderRef childp7ecx;
+ const SecAsn1Template *template;
+
+ poolp = p7ecx->cmsg->poolp;
+
+ /* call _Encode_BeforeData handlers */
+ switch (p7ecx->type) {
+ case SEC_OID_PKCS7_SIGNED_DATA:
+ /* we're encoding a signedData, so set up the digests */
+ rv = SecCmsSignedDataEncodeBeforeData(p7ecx->content.signedData);
+ break;
+ case SEC_OID_PKCS7_DIGESTED_DATA:
+ /* we're encoding a digestedData, so set up the digest */
+ rv = SecCmsDigestedDataEncodeBeforeData(p7ecx->content.digestedData);
+ break;
+ case SEC_OID_PKCS7_ENVELOPED_DATA:
+ rv = SecCmsEnvelopedDataEncodeBeforeData(p7ecx->content.envelopedData);
+ break;
+ case SEC_OID_PKCS7_ENCRYPTED_DATA:
+ rv = SecCmsEncryptedDataEncodeBeforeData(p7ecx->content.encryptedData);
+ break;
+ default:
+ rv = SECFailure;
+ }
+ if (rv != SECSuccess)
+ return SECFailure;
+
+ /* ok, now we have a pointer to cinfo */
+ /* find out what kind of data is encapsulated */
+
+ cinfo = SecCmsContentGetContentInfo(p7ecx->content.pointer, p7ecx->type);
+ childtype = SecCmsContentInfoGetContentTypeTag(cinfo);
+
+ switch (childtype) {
+ case SEC_OID_PKCS7_SIGNED_DATA:
+ case SEC_OID_PKCS7_ENVELOPED_DATA:
+ case SEC_OID_PKCS7_ENCRYPTED_DATA:
+ case SEC_OID_PKCS7_DIGESTED_DATA:
+#if 0
+ case SEC_OID_PKCS7_DATA: /* XXX here also??? maybe yes! */
+#endif
+ /* in these cases, we need to set up a child encoder! */
+ /* create new encoder context */
+ childp7ecx = PORT_ZAlloc(sizeof(struct SecCmsEncoderStr));
+ if (childp7ecx == NULL)
+ return SECFailure;
+
+ /* the CHILD encoder needs to hand its encoded data to the CURRENT encoder
+ * (which will encrypt and/or digest it)
+ * this needs to route back into our update function
+ * which finds the lowest encoding context & encrypts and computes digests */
+ childp7ecx->type = childtype;
+ childp7ecx->content = cinfo->content;
+ /* use the non-recursive update function here, of course */
+ childp7ecx->output.outputfn = (SecCmsContentCallback)nss_cms_encoder_update;
+ childp7ecx->output.outputarg = p7ecx;
+ childp7ecx->output.destpoolp = NULL;
+ childp7ecx->output.dest = NULL;
+ childp7ecx->cmsg = p7ecx->cmsg;
+
+ template = SecCmsUtilGetTemplateByTypeTag(childtype);
+ if (template == NULL)
+ goto loser; /* cannot happen */
+
+ /* now initialize the data for encoding the first third */
+ switch (childp7ecx->type) {
+ case SEC_OID_PKCS7_SIGNED_DATA:
+ rv = SecCmsSignedDataEncodeBeforeStart(cinfo->content.signedData);
+ break;
+ case SEC_OID_PKCS7_ENVELOPED_DATA:
+ rv = SecCmsEnvelopedDataEncodeBeforeStart(cinfo->content.envelopedData);
+ break;
+ case SEC_OID_PKCS7_DIGESTED_DATA:
+ rv = SecCmsDigestedDataEncodeBeforeStart(cinfo->content.digestedData);
+ break;
+ case SEC_OID_PKCS7_ENCRYPTED_DATA:
+ rv = SecCmsEncryptedDataEncodeBeforeStart(cinfo->content.encryptedData);
+ break;
+ case SEC_OID_PKCS7_DATA:
+ case SEC_OID_OTHER:
+ rv = SECSuccess;
+ break;
+ default:
+ PORT_Assert(0);
+ break;
+ }
+ if (rv != SECSuccess)
+ goto loser;
+
+ /*
+ * Initialize the BER encoder.
+ */
+ childp7ecx->ecx = SEC_ASN1EncoderStart(cinfo->content.pointer, template,
+ nss_cms_encoder_out, &(childp7ecx->output));
+ if (childp7ecx->ecx == NULL)
+ goto loser;
+
+ childp7ecx->ecxupdated = PR_FALSE;
+
+ /*
+ * Indicate that we are streaming. We will be streaming until we
+ * get past the contents bytes.
+ */
+ SEC_ASN1EncoderSetStreaming(childp7ecx->ecx);
+
+ /*
+ * The notify function will watch for the contents field.
+ */
+ SEC_ASN1EncoderSetNotifyProc(childp7ecx->ecx, nss_cms_encoder_notify, childp7ecx);
+
+ /* please note that we are NOT calling SEC_ASN1EncoderUpdate here to kick off the */
+ /* encoding process - we'll do that from the update function instead */
+ /* otherwise we'd be encoding data from a call of the notify function of the */
+ /* parent encoder (which would not work) */
+
+ /* this will kick off the encoding process & encode everything up to the content bytes,
+ * at which point the notify function sets streaming mode (and possibly creates
+ * another child encoder). */
+ if (SEC_ASN1EncoderUpdate(childp7ecx->ecx, NULL, 0) != SECSuccess)
+ goto loser;
+
+ p7ecx->childp7ecx = childp7ecx;
+ break;
+
+ case SEC_OID_PKCS7_DATA:
+ case SEC_OID_OTHER:
+ p7ecx->childp7ecx = NULL;
+ break;
+ default:
+ /* we do not know this type */
+ p7ecx->error = SEC_ERROR_BAD_DER;
+ break;
+ }
+
+ return SECSuccess;
+
+loser:
+ if (childp7ecx) {
+ if (childp7ecx->ecx)
+ SEC_ASN1EncoderFinish(childp7ecx->ecx);
+ PORT_Free(childp7ecx);
+ }
+ return SECFailure;
+}
+
+static OSStatus
+nss_cms_after_data(SecCmsEncoderRef p7ecx)
+{
+ OSStatus rv = SECFailure;
+
+ switch (p7ecx->type) {
+ case SEC_OID_PKCS7_SIGNED_DATA:
+ /* this will finish the digests and sign */
+ rv = SecCmsSignedDataEncodeAfterData(p7ecx->content.signedData);
+ break;
+ case SEC_OID_PKCS7_ENVELOPED_DATA:
+ rv = SecCmsEnvelopedDataEncodeAfterData(p7ecx->content.envelopedData);
+ break;
+ case SEC_OID_PKCS7_DIGESTED_DATA:
+ rv = SecCmsDigestedDataEncodeAfterData(p7ecx->content.digestedData);
+ break;
+ case SEC_OID_PKCS7_ENCRYPTED_DATA:
+ rv = SecCmsEncryptedDataEncodeAfterData(p7ecx->content.encryptedData);
+ break;
+ case SEC_OID_PKCS7_DATA:
+ case SEC_OID_OTHER:
+ /* do nothing */
+ break;
+ default:
+ rv = SECFailure;
+ break;
+ }
+ return rv;
+}
+
+/*
+ * nss_cms_encoder_work_data - process incoming data
+ *
+ * (from the user or the next encoding layer)
+ * Here, we need to digest and/or encrypt, then pass it on
+ */
+static OSStatus
+nss_cms_encoder_work_data(SecCmsEncoderRef p7ecx, CSSM_DATA_PTR dest,
+ const unsigned char *data, size_t len,
+ Boolean final, Boolean innermost)
+{
+ unsigned char *buf = NULL;
+ OSStatus rv;
+ SecCmsContentInfoRef cinfo;
+
+ rv = SECSuccess; /* may as well be optimistic */
+
+ /*
+ * We should really have data to process, or we should be trying
+ * to finish/flush the last block. (This is an overly paranoid
+ * check since all callers are in this file and simple inspection
+ * proves they do it right. But it could find a bug in future
+ * modifications/development, that is why it is here.)
+ */
+ PORT_Assert ((data != NULL && len) || final);
+
+ /* we got data (either from the caller, or from a lower level encoder) */
+ cinfo = SecCmsContentGetContentInfo(p7ecx->content.pointer, p7ecx->type);
+
+ /* Update the running digest. */
+ if (len && cinfo->digcx != NULL)
+ SecCmsDigestContextUpdate(cinfo->digcx, data, len);
+
+ /* Encrypt this chunk. */
+ if (cinfo->ciphcx != NULL) {
+ CSSM_SIZE inlen; /* length of data being encrypted */
+ CSSM_SIZE outlen = 0; /* length of encrypted data */
+ CSSM_SIZE buflen; /* length available for encrypted data */
+
+ inlen = len;
+ buflen = SecCmsCipherContextEncryptLength(cinfo->ciphcx, inlen, final);
+ if (buflen == 0) {
+ /*
+ * No output is expected, but the input data may be buffered
+ * so we still have to call Encrypt.
+ */
+ rv = SecCmsCipherContextEncrypt(cinfo->ciphcx, NULL, NULL, 0,
+ data, inlen, final);
+ if (final) {
+ len = 0;
+ goto done;
+ }
+ return rv;
+ }
+
+ if (dest != NULL)
+ buf = (unsigned char*)PORT_ArenaAlloc(p7ecx->cmsg->poolp, buflen);
+ else
+ buf = (unsigned char*)PORT_Alloc(buflen);
+
+ if (buf == NULL) {
+ rv = SECFailure;
+ } else {
+ rv = SecCmsCipherContextEncrypt(cinfo->ciphcx, buf, &outlen, buflen,
+ data, inlen, final);
+ data = buf;
+ len = outlen;
+ }
+ if (rv != SECSuccess)
+ /* encryption or malloc failed? */
+ return rv;
+ }
+
+
+ /*
+ * at this point (data,len) has everything we'd like to give to the CURRENT encoder
+ * (which will encode it, then hand it back to the user or the parent encoder)
+ * We don't encode the data if we're innermost and we're told not to include the data
+ */
+ if (p7ecx->ecx != NULL && len && (!innermost || cinfo->rawContent != NULL))
+ rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, (const char *)data, len);
+
+done:
+
+ if (cinfo->ciphcx != NULL) {
+ if (dest != NULL) {
+ dest->Data = buf;
+ dest->Length = len;
+ } else if (buf != NULL) {
+ PORT_Free (buf);
+ }
+ }
+ return rv;
+}
+
+/*
+ * nss_cms_encoder_update - deliver encoded data to the next higher level
+ *
+ * no recursion here because we REALLY want to end up at the next higher encoder!
+ */
+static OSStatus
+nss_cms_encoder_update(SecCmsEncoderRef p7ecx, const char *data, size_t len)
+{
+ /* XXX Error handling needs help. Return what? Do "Finish" on failure? */
+ return nss_cms_encoder_work_data (p7ecx, NULL, (const unsigned char *)data, len, PR_FALSE, PR_FALSE);
+}
+
+/*
+ * SecCmsEncoderCreate - set up encoding of a CMS message
+ *
+ * "cmsg" - message to encode
+ * "outputfn", "outputarg" - callback function for delivery of DER-encoded output
+ * will not be called if NULL.
+ * "dest" - if non-NULL, pointer to CSSM_DATA that will hold the DER-encoded output
+ * "destpoolp" - pool to allocate DER-encoded output in
+ * "pwfn", pwfn_arg" - callback function for getting token password
+ * "decrypt_key_cb", "decrypt_key_cb_arg" - callback function for getting bulk key for encryptedData
+ * "detached_digestalgs", "detached_digests" - digests from detached content
+ */
+OSStatus
+SecCmsEncoderCreate(SecCmsMessageRef cmsg,
+ SecCmsContentCallback outputfn, void *outputarg,
+ CSSM_DATA_PTR dest, SecArenaPoolRef destpool,
+ PK11PasswordFunc pwfn, void *pwfn_arg,
+ SecCmsGetDecryptKeyCallback decrypt_key_cb, void *decrypt_key_cb_arg,
+ SECAlgorithmID **detached_digestalgs, CSSM_DATA_PTR *detached_digests,
+ SecCmsEncoderRef *outEncoder)
+{
+ SecCmsEncoderRef p7ecx;
+ OSStatus result;
+ SecCmsContentInfoRef cinfo;
+
+ SecCmsMessageSetEncodingParams(cmsg, pwfn, pwfn_arg, decrypt_key_cb, decrypt_key_cb_arg,
+ detached_digestalgs, detached_digests);
+
+ p7ecx = (SecCmsEncoderRef)PORT_ZAlloc(sizeof(struct SecCmsEncoderStr));
+ if (p7ecx == NULL) {
+ result = memFullErr;
+ goto loser;
+ }
+
+ p7ecx->cmsg = cmsg;
+ p7ecx->output.outputfn = outputfn;
+ p7ecx->output.outputarg = outputarg;
+ p7ecx->output.dest = dest;
+ p7ecx->output.destpoolp = (PLArenaPool *)destpool;
+ p7ecx->type = SEC_OID_UNKNOWN;
+
+ cinfo = SecCmsMessageGetContentInfo(cmsg);
+
+ switch (SecCmsContentInfoGetContentTypeTag(cinfo)) {
+ case SEC_OID_PKCS7_SIGNED_DATA:
+ result = SecCmsSignedDataEncodeBeforeStart(cinfo->content.signedData);
+ break;
+ case SEC_OID_PKCS7_ENVELOPED_DATA:
+ result = SecCmsEnvelopedDataEncodeBeforeStart(cinfo->content.envelopedData);
+ break;
+ case SEC_OID_PKCS7_DIGESTED_DATA:
+ result = SecCmsDigestedDataEncodeBeforeStart(cinfo->content.digestedData);
+ break;
+ case SEC_OID_PKCS7_ENCRYPTED_DATA:
+ result = SecCmsEncryptedDataEncodeBeforeStart(cinfo->content.encryptedData);
+ break;
+ default:
+ /* @@@ We need a better error for unsupported message types. */
+ result = paramErr;
+ break;
+ }
+ if (result)
+ goto loser;
+
+ /* Initialize the BER encoder.
+ * Note that this will not encode anything until the first call to SEC_ASN1EncoderUpdate */
+ p7ecx->ecx = SEC_ASN1EncoderStart(cmsg, SecCmsMessageTemplate,
+ nss_cms_encoder_out, &(p7ecx->output));
+ if (p7ecx->ecx == NULL) {
+ result = PORT_GetError();
+ PORT_Free (p7ecx);
+ goto loser;
+ }
+ p7ecx->ecxupdated = PR_FALSE;
+
+ /*
+ * Indicate that we are streaming. We will be streaming until we
+ * get past the contents bytes.
+ */
+ SEC_ASN1EncoderSetStreaming(p7ecx->ecx);
+
+ /*
+ * The notify function will watch for the contents field.
+ */
+ SEC_ASN1EncoderSetNotifyProc(p7ecx->ecx, nss_cms_encoder_notify, p7ecx);
+
+ /* this will kick off the encoding process & encode everything up to the content bytes,
+ * at which point the notify function sets streaming mode (and possibly creates
+ * a child encoder). */
+ if (SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0) != SECSuccess) {
+ result = PORT_GetError();
+ PORT_Free (p7ecx);
+ goto loser;
+ }
+
+ *outEncoder = p7ecx;
+loser:
+ return result;
+}
+
+/*
+ * SecCmsEncoderUpdate - take content data delivery from the user
+ *
+ * "p7ecx" - encoder context
+ * "data" - content data
+ * "len" - length of content data
+ *
+ * need to find the lowest level (and call SEC_ASN1EncoderUpdate on the way down),
+ * then hand the data to the work_data fn
+ */
+OSStatus
+SecCmsEncoderUpdate(SecCmsEncoderRef p7ecx, const void *data, CFIndex len)
+{
+ OSStatus result;
+ SecCmsContentInfoRef cinfo;
+ SECOidTag childtype;
+
+ if (p7ecx->error)
+ return p7ecx->error;
+
+ /* hand data to the innermost decoder */
+ if (p7ecx->childp7ecx) {
+ /* recursion here */
+ result = SecCmsEncoderUpdate(p7ecx->childp7ecx, data, len);
+ } else {
+ /* we are at innermost decoder */
+ /* find out about our inner content type - must be data */
+ cinfo = SecCmsContentGetContentInfo(p7ecx->content.pointer, p7ecx->type);
+ childtype = SecCmsContentInfoGetContentTypeTag(cinfo);
+ if ((childtype != SEC_OID_PKCS7_DATA) && (childtype != SEC_OID_OTHER))
+ return paramErr; /* @@@ Maybe come up with a better error? */
+ /* and we must not have preset data */
+ if (cinfo->content.data != NULL)
+ return paramErr; /* @@@ Maybe come up with a better error? */
+
+ /* hand it the data so it can encode it (let DER trickle up the chain) */
+ result = nss_cms_encoder_work_data(p7ecx, NULL, (const unsigned char *)data, len, PR_FALSE, PR_TRUE);
+ if (result)
+ result = PORT_GetError();
+ }
+ return result;
+}
+
+/*
+ * SecCmsEncoderDestroy - stop all encoding
+ *
+ * we need to walk down the chain of encoders and the finish them from the innermost out
+ */
+void
+SecCmsEncoderDestroy(SecCmsEncoderRef p7ecx)
+{
+ /* XXX do this right! */
+
+ /*
+ * Finish any inner decoders before us so that all the encoded data is flushed
+ * This basically finishes all the decoders from the innermost to the outermost.
+ * Finishing an inner decoder may result in data being updated to the outer decoder
+ * while we are already in SecCmsEncoderFinish, but that's allright.
+ */
+ if (p7ecx->childp7ecx)
+ SecCmsEncoderDestroy(p7ecx->childp7ecx); /* frees p7ecx->childp7ecx */
+
+ /*
+ * On the way back up, there will be no more data (if we had an
+ * inner encoder, it is done now!)
+ * Flush out any remaining data and/or finish digests.
+ */
+ if (nss_cms_encoder_work_data(p7ecx, NULL, NULL, 0, PR_TRUE, (p7ecx->childp7ecx == NULL)))
+ goto loser;
+
+ p7ecx->childp7ecx = NULL;
+
+ /* kick the encoder back into working mode again.
+ * We turn off streaming stuff (which will cause the encoder to continue
+ * encoding happily, now that we have all the data (like digests) ready for it).
+ */
+ SEC_ASN1EncoderClearTakeFromBuf(p7ecx->ecx);
+ SEC_ASN1EncoderClearStreaming(p7ecx->ecx);
+
+ /* now that TakeFromBuf is off, this will kick this encoder to finish encoding */
+ SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0);
+
+loser:
+ SEC_ASN1EncoderFinish(p7ecx->ecx);
+ PORT_Free (p7ecx);
+}
+
+/*
+ * SecCmsEncoderFinish - signal the end of data
+ *
+ * we need to walk down the chain of encoders and the finish them from the innermost out
+ */
+OSStatus
+SecCmsEncoderFinish(SecCmsEncoderRef p7ecx)
+{
+ OSStatus result;
+ SecCmsContentInfoRef cinfo;
+ SECOidTag childtype;
+
+ /*
+ * Finish any inner decoders before us so that all the encoded data is flushed
+ * This basically finishes all the decoders from the innermost to the outermost.
+ * Finishing an inner decoder may result in data being updated to the outer decoder
+ * while we are already in SecCmsEncoderFinish, but that's allright.
+ */
+ if (p7ecx->childp7ecx) {
+ result = SecCmsEncoderFinish(p7ecx->childp7ecx); /* frees p7ecx->childp7ecx */
+ if (result)
+ goto loser;
+ }
+
+ /*
+ * On the way back up, there will be no more data (if we had an
+ * inner encoder, it is done now!)
+ * Flush out any remaining data and/or finish digests.
+ */
+ result = nss_cms_encoder_work_data(p7ecx, NULL, NULL, 0, PR_TRUE, (p7ecx->childp7ecx == NULL));
+ if (result) {
+ result = PORT_GetError();
+ goto loser;
+ }
+
+ p7ecx->childp7ecx = NULL;
+
+ /* find out about our inner content type - must be data */
+ cinfo = SecCmsContentGetContentInfo(p7ecx->content.pointer, p7ecx->type);
+ childtype = SecCmsContentInfoGetContentTypeTag(cinfo);
+ if ( ((childtype == SEC_OID_PKCS7_DATA) || (childtype == SEC_OID_OTHER)) &&
+ (cinfo->content.data == NULL)) {
+ SEC_ASN1EncoderClearTakeFromBuf(p7ecx->ecx);
+ /* now that TakeFromBuf is off, this will kick this encoder to finish encoding */
+ result = SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0);
+ if (result)
+ result = PORT_GetError();
+ }
+
+ SEC_ASN1EncoderClearStreaming(p7ecx->ecx);
+
+ if (p7ecx->error && !result)
+ result = p7ecx->error;
+
+loser:
+ SEC_ASN1EncoderFinish(p7ecx->ecx);
+ PORT_Free (p7ecx);
+ return result;
+}
+
+OSStatus
+SecCmsMessageEncode(SecCmsMessageRef cmsg, const CSSM_DATA *input, SecArenaPoolRef arena,
+ CSSM_DATA_PTR outBer)
+{
+ SecCmsEncoderRef encoder;
+ OSStatus result;
+
+ if (!cmsg || !outBer || !arena) {
+ result = paramErr;
+ goto loser;
+ }
+
+ result = SecCmsEncoderCreate(cmsg, 0, 0, outBer, arena, 0, 0, 0, 0, 0, 0, &encoder);
+ if (result)
+ goto loser;
+
+ if (input) {
+ result = SecCmsEncoderUpdate(encoder, input->Data, input->Length);
+ if (result) {
+ SecCmsEncoderDestroy(encoder);
+ goto loser;
+ }
+ }
+ result = SecCmsEncoderFinish(encoder);
+
+loser:
+ return result;
+}
projects / apple / security.git / blobdiff