mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-06-07 13:53:33 +00:00
430 lines
9.6 KiB
C++
430 lines
9.6 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsNSSASN1Object.h"
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#include "nsIComponentManager.h"
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#include "secasn1.h"
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#include "nsReadableUtils.h"
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#include "nsIMutableArray.h"
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#include "nsArrayUtils.h"
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#include "nsXPCOMCID.h"
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NS_IMPL_ISUPPORTS(nsNSSASN1Sequence, nsIASN1Sequence, nsIASN1Object)
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NS_IMPL_ISUPPORTS(nsNSSASN1PrintableItem, nsIASN1PrintableItem, nsIASN1Object)
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// This function is used to interpret an integer that
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// was encoded in a DER buffer. This function is used
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// when converting a DER buffer into a nsIASN1Object
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// structure. This interprets the buffer in data
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// as defined by the DER (Distinguised Encoding Rules) of
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// ASN1.
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static int
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getInteger256(unsigned char *data, unsigned int nb)
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{
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int val;
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switch (nb) {
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case 1:
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val = data[0];
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break;
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case 2:
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val = (data[0] << 8) | data[1];
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break;
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case 3:
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val = (data[0] << 16) | (data[1] << 8) | data[2];
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break;
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case 4:
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val = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
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break;
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default:
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return -1;
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}
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return val;
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}
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// This function is used to retrieve the lenght of a DER encoded
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// item. It looks to see if this a multibyte length and then
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// interprets the buffer accordingly to get the actual length value.
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// This funciton is used mostly while parsing the DER headers.
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//
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// A DER encoded item has the following structure:
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//
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// <tag><length<data consisting of lenght bytes>
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static int32_t
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getDERItemLength(unsigned char *data, unsigned char *end,
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unsigned long *bytesUsed, bool *indefinite)
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{
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unsigned char lbyte = *data++;
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int32_t length = -1;
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*indefinite = false;
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if (lbyte >= 0x80) {
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// Multibyte length
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unsigned nb = (unsigned) (lbyte & 0x7f);
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if (nb > 4) {
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return -1;
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}
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if (nb > 0) {
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if ((data+nb) > end) {
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return -1;
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}
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length = getInteger256(data, nb);
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if (length < 0)
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return -1;
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} else {
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*indefinite = true;
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length = 0;
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}
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*bytesUsed = nb+1;
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} else {
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length = lbyte;
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*bytesUsed = 1;
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}
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return length;
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}
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static nsresult
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buildASN1ObjectFromDER(unsigned char *data,
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unsigned char *end,
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nsIASN1Sequence *parent)
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{
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nsresult rv;
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nsCOMPtr<nsIASN1Sequence> sequence;
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nsCOMPtr<nsIASN1PrintableItem> printableItem;
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nsCOMPtr<nsIASN1Object> asn1Obj;
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nsCOMPtr<nsIMutableArray> parentObjects;
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NS_ENSURE_ARG_POINTER(parent);
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if (data >= end)
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return NS_OK;
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unsigned char code, tagnum;
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// A DER item has the form of |tag|len|data
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// tag is one byte and describes the type of element
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// we are dealing with.
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// len is a DER encoded int telling us how long the data is
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// data is a buffer that is len bytes long and has to be
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// interpreted according to its type.
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unsigned long bytesUsed;
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bool indefinite;
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int32_t len;
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uint32_t type;
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rv = parent->GetASN1Objects(getter_AddRefs(parentObjects));
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if (NS_FAILED(rv) || !parentObjects)
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return NS_ERROR_FAILURE;
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while (data < end) {
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code = *data;
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tagnum = code & SEC_ASN1_TAGNUM_MASK;
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/*
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* NOTE: This code does not (yet) handle the high-tag-number form!
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*/
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if (tagnum == SEC_ASN1_HIGH_TAG_NUMBER) {
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return NS_ERROR_FAILURE;
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}
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data++;
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len = getDERItemLength(data, end, &bytesUsed, &indefinite);
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if (len < 0) {
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return NS_ERROR_FAILURE;
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}
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data += bytesUsed;
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if (data + len > end) {
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return NS_ERROR_FAILURE;
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}
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if (code & SEC_ASN1_CONSTRUCTED) {
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if (len > 0 || indefinite) {
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sequence = new nsNSSASN1Sequence();
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switch (code & SEC_ASN1_CLASS_MASK) {
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case SEC_ASN1_UNIVERSAL:
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type = tagnum;
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break;
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case SEC_ASN1_APPLICATION:
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type = nsIASN1Object::ASN1_APPLICATION;
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break;
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case SEC_ASN1_CONTEXT_SPECIFIC:
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type = nsIASN1Object::ASN1_CONTEXT_SPECIFIC;
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break;
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case SEC_ASN1_PRIVATE:
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type = nsIASN1Object::ASN1_PRIVATE;
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break;
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default:
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NS_ERROR("Bad DER");
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return NS_ERROR_FAILURE;
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}
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sequence->SetTag(tagnum);
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sequence->SetType(type);
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rv = buildASN1ObjectFromDER(data, (len == 0) ? end : data + len,
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sequence);
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asn1Obj = sequence;
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}
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} else {
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printableItem = new nsNSSASN1PrintableItem();
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asn1Obj = printableItem;
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asn1Obj->SetType(tagnum);
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asn1Obj->SetTag(tagnum);
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printableItem->SetData((char*)data, len);
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}
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data += len;
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parentObjects->AppendElement(asn1Obj, false);
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}
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return NS_OK;
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}
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nsresult
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CreateFromDER(unsigned char *data,
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unsigned int len,
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nsIASN1Object **retval)
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{
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nsCOMPtr<nsIASN1Sequence> sequence = new nsNSSASN1Sequence;
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*retval = nullptr;
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nsresult rv = buildASN1ObjectFromDER(data, data+len, sequence);
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if (NS_SUCCEEDED(rv)) {
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// The actual object will be the first element inserted
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// into the sequence of the sequence variable we created.
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nsCOMPtr<nsIMutableArray> elements;
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sequence->GetASN1Objects(getter_AddRefs(elements));
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nsCOMPtr<nsIASN1Object> asn1Obj = do_QueryElementAt(elements, 0);
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if (!asn1Obj) {
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return NS_ERROR_FAILURE;
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}
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asn1Obj.forget(retval);
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}
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return rv;
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}
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nsNSSASN1Sequence::nsNSSASN1Sequence() : mType(0),
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mTag(0),
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mIsValidContainer(true),
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mIsExpanded(true)
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{
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/* member initializers and constructor code */
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}
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nsNSSASN1Sequence::~nsNSSASN1Sequence()
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{
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/* destructor code */
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::GetASN1Objects(nsIMutableArray * *aASN1Objects)
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{
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if (!mASN1Objects) {
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mASN1Objects = do_CreateInstance(NS_ARRAY_CONTRACTID);
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}
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*aASN1Objects = mASN1Objects;
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NS_IF_ADDREF(*aASN1Objects);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::SetASN1Objects(nsIMutableArray * aASN1Objects)
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{
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mASN1Objects = aASN1Objects;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::GetTag(uint32_t *aTag)
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{
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*aTag = mTag;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::SetTag(uint32_t aTag)
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{
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mTag = aTag;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::GetType(uint32_t *aType)
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{
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*aType = mType;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::SetType(uint32_t aType)
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{
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mType = aType;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::GetDisplayName(nsAString &aDisplayName)
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{
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aDisplayName = mDisplayName;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::SetDisplayName(const nsAString &aDisplayName)
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{
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mDisplayName = aDisplayName;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::GetDisplayValue(nsAString &aDisplayValue)
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{
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aDisplayValue = mDisplayValue;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::SetDisplayValue(const nsAString &aDisplayValue)
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{
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mDisplayValue = aDisplayValue;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::GetIsValidContainer(bool *aIsValidContainer)
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{
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NS_ENSURE_ARG_POINTER(aIsValidContainer);
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*aIsValidContainer = mIsValidContainer;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::SetIsValidContainer(bool aIsValidContainer)
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{
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mIsValidContainer = aIsValidContainer;
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SetIsExpanded(mIsValidContainer);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::GetIsExpanded(bool *aIsExpanded)
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{
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NS_ENSURE_ARG_POINTER(aIsExpanded);
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*aIsExpanded = mIsExpanded;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1Sequence::SetIsExpanded(bool aIsExpanded)
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{
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mIsExpanded = aIsExpanded;
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return NS_OK;
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}
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nsNSSASN1PrintableItem::nsNSSASN1PrintableItem() : mType(0),
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mTag(0),
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mData(nullptr),
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mLen(0)
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{
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/* member initializers and constructor code */
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}
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nsNSSASN1PrintableItem::~nsNSSASN1PrintableItem()
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{
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/* destructor code */
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if (mData)
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free(mData);
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::GetDisplayValue(nsAString &aValue)
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{
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aValue = mValue;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::SetDisplayValue(const nsAString &aValue)
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{
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mValue = aValue;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::GetTag(uint32_t *aTag)
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{
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*aTag = mTag;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::SetTag(uint32_t aTag)
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{
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mTag = aTag;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::GetType(uint32_t *aType)
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{
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*aType = mType;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::SetType(uint32_t aType)
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{
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mType = aType;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::SetData(char *data, uint32_t len)
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{
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if (len > 0) {
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if (mLen < len) {
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unsigned char* newData = (unsigned char*)moz_xrealloc(mData, len);
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if (!newData)
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return NS_ERROR_OUT_OF_MEMORY;
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mData = newData;
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}
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memcpy(mData, data, len);
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} else if (len == 0) {
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if (mData) {
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free(mData);
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mData = nullptr;
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}
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}
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mLen = len;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::GetData(char **outData, uint32_t *outLen)
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{
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NS_ENSURE_ARG_POINTER(outData);
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NS_ENSURE_ARG_POINTER(outLen);
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*outData = (char*)mData;
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*outLen = mLen;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::GetDisplayName(nsAString &aDisplayName)
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{
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aDisplayName = mDisplayName;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNSSASN1PrintableItem::SetDisplayName(const nsAString &aDisplayName)
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{
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mDisplayName = aDisplayName;
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return NS_OK;
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}
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