diff options
Diffstat (limited to 'security/nss/lib/smime/cmsencode.c')
| -rw-r--r-- | security/nss/lib/smime/cmsencode.c | 740 |
1 files changed, 0 insertions, 740 deletions
diff --git a/security/nss/lib/smime/cmsencode.c b/security/nss/lib/smime/cmsencode.c deleted file mode 100644 index cc0303cd6..000000000 --- a/security/nss/lib/smime/cmsencode.c +++ /dev/null @@ -1,740 +0,0 @@ -/* - * 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. - * - * $Id$ - */ - -#include "cmslocal.h" - -#include "cert.h" -#include "key.h" -#include "secasn1.h" -#include "secoid.h" -#include "secrng.h" -#include "secitem.h" -#include "pk11func.h" -#include "secerr.h" - -struct nss_cms_encoder_output { - NSSCMSContentCallback outputfn; - void *outputarg; - PLArenaPool *destpoolp; - SECItem *dest; -}; - -struct NSSCMSEncoderContextStr { - SEC_ASN1EncoderContext * ecx; /* ASN.1 encoder context */ - PRBool ecxupdated; /* true if data was handed in */ - NSSCMSMessage * cmsg; /* pointer to the root message */ - SECOidTag type; /* type tag of the current content */ - NSSCMSContent content; /* pointer to current content */ - struct nss_cms_encoder_output output; /* output function */ - int error; /* error code */ - NSSCMSEncoderContext * childp7ecx; /* link to child encoder context */ -}; - -static SECStatus nss_cms_before_data(NSSCMSEncoderContext *p7ecx); -static SECStatus nss_cms_after_data(NSSCMSEncoderContext *p7ecx); -static SECStatus nss_cms_encoder_update(NSSCMSEncoderContext *p7ecx, const char *data, unsigned long len); -static SECStatus nss_cms_encoder_work_data(NSSCMSEncoderContext *p7ecx, SECItem *dest, - const unsigned char *data, unsigned long len, - PRBool final, PRBool innermost); - -extern const SEC_ASN1Template NSSCMSMessageTemplate[]; - -/* - * 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, unsigned long len, - int depth, SEC_ASN1EncodingPart data_kind) -{ - struct nss_cms_encoder_output *output = (struct nss_cms_encoder_output *)arg; - unsigned char *dest; - unsigned long offset; - -#ifdef CMSDEBUG - int i; - - fprintf(stderr, "kind = %d, depth = %d, len = %d\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 SECItem */ - offset = output->dest->len; - if (offset == 0) { - dest = (unsigned char *)PORT_ArenaAlloc(output->destpoolp, len); - } else { - dest = (unsigned char *)PORT_ArenaGrow(output->destpoolp, - output->dest->data, - output->dest->len, - output->dest->len + len); - } - if (dest == NULL) - /* oops */ - return; - - output->dest->data = dest; - output->dest->len += 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, PRBool before, void *dest, int depth) -{ - NSSCMSEncoderContext *p7ecx; - NSSCMSContentInfo *rootcinfo, *cinfo; - PRBool after = !before; - PLArenaPool *poolp; - SECOidTag childtype; - SECItem *item; - - p7ecx = (NSSCMSEncoderContext *)arg; - PORT_Assert(p7ecx != NULL); - - rootcinfo = &(p7ecx->cmsg->contentInfo); - poolp = p7ecx->cmsg->poolp; - -#ifdef CMSDEBUG - fprintf(stderr, "%6.6s, dest = 0x%08x, 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 = NSS_CMSContentInfo_GetContentTypeTag(rootcinfo); - /* set up a pointer to our current content */ - p7ecx->content = rootcinfo->content; - } - break; - - case SEC_OID_PKCS7_DATA: - 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->len, 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 = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type); - childtype = NSS_CMSContentInfo_GetContentTypeTag(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 && (item = cinfo->content.data) != NULL) - /* we have data - feed it in */ - (void)nss_cms_encoder_work_data(p7ecx, NULL, item->data, item->len, 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 SECStatus -nss_cms_before_data(NSSCMSEncoderContext *p7ecx) -{ - SECStatus rv; - SECOidTag childtype; - NSSCMSContentInfo *cinfo; - PLArenaPool *poolp; - NSSCMSEncoderContext *childp7ecx; - const SEC_ASN1Template *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 = NSS_CMSSignedData_Encode_BeforeData(p7ecx->content.signedData); - break; - case SEC_OID_PKCS7_DIGESTED_DATA: - /* we're encoding a digestedData, so set up the digest */ - rv = NSS_CMSDigestedData_Encode_BeforeData(p7ecx->content.digestedData); - break; - case SEC_OID_PKCS7_ENVELOPED_DATA: - rv = NSS_CMSEnvelopedData_Encode_BeforeData(p7ecx->content.envelopedData); - break; - case SEC_OID_PKCS7_ENCRYPTED_DATA: - rv = NSS_CMSEncryptedData_Encode_BeforeData(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 = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type); - childtype = NSS_CMSContentInfo_GetContentTypeTag(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(NSSCMSEncoderContext)); - 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 = (NSSCMSContentCallback)nss_cms_encoder_update; - childp7ecx->output.outputarg = p7ecx; - childp7ecx->output.destpoolp = NULL; - childp7ecx->output.dest = NULL; - childp7ecx->cmsg = p7ecx->cmsg; - - template = NSS_CMSUtil_GetTemplateByTypeTag(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 = NSS_CMSSignedData_Encode_BeforeStart(cinfo->content.signedData); - break; - case SEC_OID_PKCS7_ENVELOPED_DATA: - rv = NSS_CMSEnvelopedData_Encode_BeforeStart(cinfo->content.envelopedData); - break; - case SEC_OID_PKCS7_DIGESTED_DATA: - rv = NSS_CMSDigestedData_Encode_BeforeStart(cinfo->content.digestedData); - break; - case SEC_OID_PKCS7_ENCRYPTED_DATA: - rv = NSS_CMSEncryptedData_Encode_BeforeStart(cinfo->content.encryptedData); - break; - case SEC_OID_PKCS7_DATA: - rv = SECSuccess; - 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: - 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 SECStatus -nss_cms_after_data(NSSCMSEncoderContext *p7ecx) -{ - SECStatus rv; - - switch (p7ecx->type) { - case SEC_OID_PKCS7_SIGNED_DATA: - /* this will finish the digests and sign */ - rv = NSS_CMSSignedData_Encode_AfterData(p7ecx->content.signedData); - break; - case SEC_OID_PKCS7_ENVELOPED_DATA: - rv = NSS_CMSEnvelopedData_Encode_AfterData(p7ecx->content.envelopedData); - break; - case SEC_OID_PKCS7_DIGESTED_DATA: - rv = NSS_CMSDigestedData_Encode_AfterData(p7ecx->content.digestedData); - break; - case SEC_OID_PKCS7_ENCRYPTED_DATA: - rv = NSS_CMSEncryptedData_Encode_AfterData(p7ecx->content.encryptedData); - break; - case SEC_OID_PKCS7_DATA: - /* 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 SECStatus -nss_cms_encoder_work_data(NSSCMSEncoderContext *p7ecx, SECItem *dest, - const unsigned char *data, unsigned long len, - PRBool final, PRBool innermost) -{ - unsigned char *buf = NULL; - SECStatus rv; - NSSCMSContentInfo *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 = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type); - - /* Update the running digest. */ - if (len && cinfo->digcx != NULL) - NSS_CMSDigestContext_Update(cinfo->digcx, data, len); - - /* Encrypt this chunk. */ - if (cinfo->ciphcx != NULL) { - unsigned int inlen; /* length of data being encrypted */ - unsigned int outlen; /* length of encrypted data */ - unsigned int buflen; /* length available for encrypted data */ - - inlen = len; - buflen = NSS_CMSCipherContext_EncryptLength(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 = NSS_CMSCipherContext_Encrypt(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 = NSS_CMSCipherContext_Encrypt(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->len = 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 SECStatus -nss_cms_encoder_update(NSSCMSEncoderContext *p7ecx, const char *data, unsigned long 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); -} - -/* - * NSS_CMSEncoder_Start - 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 SECItem 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 - */ -NSSCMSEncoderContext * -NSS_CMSEncoder_Start(NSSCMSMessage *cmsg, - NSSCMSContentCallback outputfn, void *outputarg, - SECItem *dest, PLArenaPool *destpoolp, - PK11PasswordFunc pwfn, void *pwfn_arg, - NSSCMSGetDecryptKeyCallback decrypt_key_cb, void *decrypt_key_cb_arg, - SECAlgorithmID **detached_digestalgs, SECItem **detached_digests) -{ - NSSCMSEncoderContext *p7ecx; - SECStatus rv; - NSSCMSContentInfo *cinfo; - - NSS_CMSMessage_SetEncodingParams(cmsg, pwfn, pwfn_arg, decrypt_key_cb, decrypt_key_cb_arg, - detached_digestalgs, detached_digests); - - p7ecx = (NSSCMSEncoderContext *)PORT_ZAlloc(sizeof(NSSCMSEncoderContext)); - if (p7ecx == NULL) { - PORT_SetError(SEC_ERROR_NO_MEMORY); - return NULL; - } - - p7ecx->cmsg = cmsg; - p7ecx->output.outputfn = outputfn; - p7ecx->output.outputarg = outputarg; - p7ecx->output.dest = dest; - p7ecx->output.destpoolp = destpoolp; - p7ecx->type = SEC_OID_UNKNOWN; - - cinfo = NSS_CMSMessage_GetContentInfo(cmsg); - - switch (NSS_CMSContentInfo_GetContentTypeTag(cinfo)) { - case SEC_OID_PKCS7_SIGNED_DATA: - rv = NSS_CMSSignedData_Encode_BeforeStart(cinfo->content.signedData); - break; - case SEC_OID_PKCS7_ENVELOPED_DATA: - rv = NSS_CMSEnvelopedData_Encode_BeforeStart(cinfo->content.envelopedData); - break; - case SEC_OID_PKCS7_DIGESTED_DATA: - rv = NSS_CMSDigestedData_Encode_BeforeStart(cinfo->content.digestedData); - break; - case SEC_OID_PKCS7_ENCRYPTED_DATA: - rv = NSS_CMSEncryptedData_Encode_BeforeStart(cinfo->content.encryptedData); - break; - default: - rv = SECFailure; - break; - } - if (rv != SECSuccess) - return NULL; - - /* Initialize the BER encoder. - * Note that this will not encode anything until the first call to SEC_ASN1EncoderUpdate */ - p7ecx->ecx = SEC_ASN1EncoderStart(cmsg, NSSCMSMessageTemplate, - nss_cms_encoder_out, &(p7ecx->output)); - if (p7ecx->ecx == NULL) { - PORT_Free (p7ecx); - return NULL; - } - 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) { - PORT_Free (p7ecx); - return NULL; - } - - return p7ecx; -} - -/* - * NSS_CMSEncoder_Update - 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 - */ -SECStatus -NSS_CMSEncoder_Update(NSSCMSEncoderContext *p7ecx, const char *data, unsigned long len) -{ - SECStatus rv; - NSSCMSContentInfo *cinfo; - SECOidTag childtype; - - if (p7ecx->error) - return SECFailure; - - /* hand data to the innermost decoder */ - if (p7ecx->childp7ecx) { - /* recursion here */ - rv = NSS_CMSEncoder_Update(p7ecx->childp7ecx, data, len); - } else { - /* we are at innermost decoder */ - /* find out about our inner content type - must be data */ - cinfo = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type); - childtype = NSS_CMSContentInfo_GetContentTypeTag(cinfo); - if (childtype != SEC_OID_PKCS7_DATA) - return SECFailure; - /* and we must not have preset data */ - if (cinfo->content.data != NULL) - return SECFailure; - - /* hand it the data so it can encode it (let DER trickle up the chain) */ - rv = nss_cms_encoder_work_data(p7ecx, NULL, (const unsigned char *)data, len, PR_FALSE, PR_TRUE); - } - return rv; -} - -/* - * NSS_CMSEncoder_Cancel - stop all encoding - * - * we need to walk down the chain of encoders and the finish them from the innermost out - */ -SECStatus -NSS_CMSEncoder_Cancel(NSSCMSEncoderContext *p7ecx) -{ - SECStatus rv = SECFailure; - - /* 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 NSS_CMSEncoder_Finish, but that's allright. - */ - if (p7ecx->childp7ecx) { - rv = NSS_CMSEncoder_Cancel(p7ecx->childp7ecx); /* frees p7ecx->childp7ecx */ - /* remember rv for now */ - } - - /* - * 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. - */ - rv = nss_cms_encoder_work_data(p7ecx, NULL, NULL, 0, PR_TRUE, (p7ecx->childp7ecx == NULL)); - if (rv != SECSuccess) - 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 */ - rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0); - -loser: - SEC_ASN1EncoderFinish(p7ecx->ecx); - PORT_Free (p7ecx); - return rv; -} - -/* - * NSS_CMSEncoder_Finish - signal the end of data - * - * we need to walk down the chain of encoders and the finish them from the innermost out - */ -SECStatus -NSS_CMSEncoder_Finish(NSSCMSEncoderContext *p7ecx) -{ - SECStatus rv = SECFailure; - NSSCMSContentInfo *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 NSS_CMSEncoder_Finish, but that's allright. - */ - if (p7ecx->childp7ecx) { - rv = NSS_CMSEncoder_Finish(p7ecx->childp7ecx); /* frees p7ecx->childp7ecx */ - if (rv != SECSuccess) - 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. - */ - rv = nss_cms_encoder_work_data(p7ecx, NULL, NULL, 0, PR_TRUE, (p7ecx->childp7ecx == NULL)); - if (rv != SECSuccess) - goto loser; - - p7ecx->childp7ecx = NULL; - - /* find out about our inner content type - must be data */ - cinfo = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type); - childtype = NSS_CMSContentInfo_GetContentTypeTag(cinfo); - if (childtype == SEC_OID_PKCS7_DATA && cinfo->content.data == NULL) { - SEC_ASN1EncoderClearTakeFromBuf(p7ecx->ecx); - /* now that TakeFromBuf is off, this will kick this encoder to finish encoding */ - rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0); - } - - SEC_ASN1EncoderClearStreaming(p7ecx->ecx); - - if (p7ecx->error) - rv = SECFailure; - -loser: - SEC_ASN1EncoderFinish(p7ecx->ecx); - PORT_Free (p7ecx); - return rv; -} |