1 files changed, 295 insertions, 0 deletions
diff --git a/security/nss/lib/pk11wrap/pk11sdr.c b/security/nss/lib/pk11wrap/pk11sdr.c
new file mode 100644
index 000000000..630be0245
--- /dev/null
+++ b/security/nss/lib/pk11wrap/pk11sdr.c
@@ -0,0 +1,295 @@
+/*
+ * 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):
+ *   thayes@netscape.com
+ * 
+ * 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.
+ *
+ * PKCS #11 Wrapper functions which handles authenticating to the card's
+ * choosing the best cards, etc.
+ */
+
+#include "seccomon.h"
+#include "secoid.h"
+#include "secasn1.h"
+#include "pkcs11.h"
+#include "pk11func.h"
+#include "pk11sdr.h"
+
+/*
+ * Data structure and template for encoding the result of an SDR operation
+ *  This is temporary.  It should include the algorithm ID of the encryption mechanism
+ */
+struct SDRResult
+{
+  SECItem keyid;
+  SECAlgorithmID alg;
+  SECItem data;
+};
+typedef struct SDRResult SDRResult;
+
+static SEC_ASN1Template template[] = {
+  { SEC_ASN1_SEQUENCE, 0, NULL, sizeof (SDRResult) },
+  { SEC_ASN1_OCTET_STRING, offsetof(SDRResult, keyid) },
+  { SEC_ASN1_INLINE, offsetof(SDRResult, alg), SECOID_AlgorithmIDTemplate },
+  { SEC_ASN1_OCTET_STRING, offsetof(SDRResult, data) },
+  { 0 }
+};
+
+static unsigned char keyID[] = {
+  0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01
+};
+
+static SECItem keyIDItem = {
+  0,
+  keyID,
+  sizeof keyID
+};
+
+/* local utility function for padding an incoming data block
+ * to the mechanism block size.
+ */
+static SECStatus
+padBlock(SECItem *data, int blockSize, SECItem *result)
+{
+  SECStatus rv = SECSuccess;
+  int padLength;
+  unsigned int i;
+
+  result->data = 0;
+  result->len = 0;
+
+  /* This algorithm always adds to the block (to indicate the number
+   * of pad bytes).  So allocate a block large enough.
+   */
+  padLength = blockSize - (data->len % blockSize);
+  result->len = data->len + padLength;
+  result->data = (unsigned char *)PORT_Alloc(result->len);
+
+  /* Copy the data */
+  PORT_Memcpy(result->data, data->data, data->len);
+
+  /* Add the pad values */
+  for(i = data->len; i < result->len; i++)
+    result->data[i] = (unsigned char)padLength;
+
+  return rv;
+}
+
+static SECStatus
+unpadBlock(SECItem *data, int blockSize, SECItem *result)
+{
+  SECStatus rv = SECSuccess;
+  int padLength;
+
+  result->data = 0;
+  result->len = 0;
+
+  /* Remove the padding from the end if the input data */
+  if (data->len == 0 || data->len % blockSize  != 0) { rv = SECFailure; goto loser; }
+
+  padLength = data->data[data->len-1];
+  if (padLength > blockSize) { rv = SECFailure; goto loser; }
+
+  result->len = data->len - padLength;
+  result->data = (unsigned char *)PORT_Alloc(result->len);
+  if (!result->data) { rv = SECFailure; goto loser; }
+
+  PORT_Memcpy(result->data, data->data, result->len);
+
+loser:
+  return rv;
+}
+
+/*
+ * PK11SDR_Encrypt
+ *  Encrypt a block of data using the symmetric key identified.  The result
+ *  is an ASN.1 (DER) encoded block of keyid, params and data.
+ */
+SECStatus
+PK11SDR_Encrypt(SECItem *keyid, SECItem *data, SECItem *result, void *cx)
+{
+  SECStatus rv = SECSuccess;
+  PK11SlotInfo *slot = 0;
+  PK11SymKey *key = 0;
+  SECItem *params = 0;
+  PK11Context *ctx = 0;
+  CK_MECHANISM_TYPE type;
+  SDRResult sdrResult;
+  SECItem paddedData;
+  SECItem *pKeyID;
+  PLArenaPool *arena = 0;
+
+  /* Initialize */
+  paddedData.len = 0;
+  paddedData.data = 0;
+
+  arena = PORT_NewArena(SEC_ASN1_DEFAULT_ARENA_SIZE);
+  if (!arena) { rv = SECFailure; goto loser; }
+
+  /* 1. Locate the requested keyid, or the default key (which has a keyid)
+   * 2. Create an encryption context
+   * 3. Encrypt
+   * 4. Encode the results (using ASN.1)
+   */
+
+  slot = PK11_GetInternalKeySlot();
+  if (!slot) { rv = SECFailure; goto loser; }
+
+  /* Use triple-DES */
+  type = CKM_DES3_CBC;
+
+  /*
+   * Login to the internal token before we look for the key, otherwise we
+   * won't find it.
+   */
+  rv = PK11_Authenticate(slot, PR_TRUE, cx);
+  if (rv != SECSuccess) goto loser;
+
+  /* Find the key to use */
+  pKeyID = keyid;
+  if (pKeyID->len == 0) {
+	  pKeyID = &keyIDItem;  /* Use default value */
+
+	  /* Try to find the key */
+	  key = PK11_FindFixedKey(slot, type, pKeyID, cx);
+	  
+	  /* If the default key doesn't exist yet, try to create it */
+	  if (!key) key = PK11_GenDES3TokenKey(slot, pKeyID, cx);
+  } else {
+	  key = PK11_FindFixedKey(slot, type, pKeyID, cx);
+  }
+
+  if (!key) { rv = SECFailure; goto loser; }
+
+  params = PK11_GenerateNewParam(type, key);
+  if (!params) { rv = SECFailure; goto loser; }
+
+  ctx = PK11_CreateContextBySymKey(type, CKA_ENCRYPT, key, params);
+  if (!ctx) { rv = SECFailure; goto loser; }
+
+  rv = padBlock(data, PK11_GetBlockSize(type, 0), &paddedData);
+  if (rv != SECSuccess) goto loser;
+
+  sdrResult.data.len = paddedData.len;
+  sdrResult.data.data = (unsigned char *)PORT_ArenaAlloc(arena, sdrResult.data.len);
+
+  rv = PK11_CipherOp(ctx, sdrResult.data.data, (int*)&sdrResult.data.len, sdrResult.data.len,
+                     paddedData.data, paddedData.len);
+  if (rv != SECSuccess) goto loser;
+
+  PK11_Finalize(ctx);
+
+  sdrResult.keyid = *pKeyID;
+
+  rv = PK11_ParamToAlgid(SEC_OID_DES_EDE3_CBC, params, arena, &sdrResult.alg);
+  if (rv != SECSuccess) goto loser;
+
+  if (!SEC_ASN1EncodeItem(0, result, &sdrResult, template)) { rv = SECFailure; goto loser; }
+
+loser:
+  SECITEM_ZfreeItem(&paddedData, PR_FALSE);
+  if (arena) PORT_FreeArena(arena, PR_TRUE);
+  if (ctx) PK11_DestroyContext(ctx, PR_TRUE);
+  if (params) SECITEM_ZfreeItem(params, PR_TRUE);
+  if (key) PK11_FreeSymKey(key);
+  if (slot) PK11_FreeSlot(slot);
+
+  return rv;
+}
+
+/*
+ * PK11SDR_Decrypt
+ *  Decrypt a block of data produced by PK11SDR_Encrypt.  The key used is identified
+ *  by the keyid field within the input.
+ */
+SECStatus
+PK11SDR_Decrypt(SECItem *data, SECItem *result, void *cx)
+{
+  SECStatus rv = SECSuccess;
+  PK11SlotInfo *slot = 0;
+  PK11SymKey *key = 0;
+  PK11Context *ctx = 0;
+  CK_MECHANISM_TYPE type;
+  SDRResult sdrResult;
+  SECItem *params = 0;
+  SECItem paddedResult;
+  PLArenaPool *arena = 0;
+
+  paddedResult.len = 0;
+  paddedResult.data = 0;
+
+  arena = PORT_NewArena(SEC_ASN1_DEFAULT_ARENA_SIZE);
+  if (!arena) { rv = SECFailure; goto loser; }
+
+  /* Decode the incoming data */
+  memset(&sdrResult, 0, sizeof sdrResult);
+  rv = SEC_ASN1DecodeItem(arena, &sdrResult, template, data);
+  if (rv != SECSuccess) goto loser;  /* Invalid format */
+
+  /* Find the slot and key for the given keyid */
+  slot = PK11_GetInternalKeySlot();
+  if (!slot) { rv = SECFailure; goto loser; }
+
+  /* Use triple-DES (Should look up the algorithm) */
+  type = CKM_DES3_CBC;
+  key = PK11_FindFixedKey(slot, type, &sdrResult.keyid, cx);
+  if (!key) { rv = SECFailure; goto loser; }
+
+  /* Get the parameter values from the data */
+  params = PK11_ParamFromAlgid(&sdrResult.alg);
+  if (!params) { rv = SECFailure; goto loser; }
+
+  ctx = PK11_CreateContextBySymKey(type, CKA_DECRYPT, key, params);
+  if (!ctx) { rv = SECFailure; goto loser; }
+
+  paddedResult.len = sdrResult.data.len;
+  paddedResult.data = PORT_ArenaAlloc(arena, paddedResult.len);
+
+  rv = PK11_CipherOp(ctx, paddedResult.data, (int*)&paddedResult.len, paddedResult.len,
+                     sdrResult.data.data, sdrResult.data.len);
+  if (rv != SECSuccess) goto loser;
+
+  PK11_Finalize(ctx);
+
+  /* Remove the padding */
+  rv = unpadBlock(&paddedResult, PK11_GetBlockSize(type, 0), result);
+  if (rv) goto loser;
+
+loser:
+  /* SECITEM_ZfreeItem(&paddedResult, PR_FALSE); */
+  if (arena) PORT_FreeArena(arena, PR_TRUE);
+  if (ctx) PK11_DestroyContext(ctx, PR_TRUE);
+  if (key) PK11_FreeSymKey(key);
+  if (params) SECITEM_ZfreeItem(params, PR_TRUE);
+  if (slot) PK11_FreeSlot(slot);
+
+  return rv;
+}