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Diffstat (limited to 'security/nss/lib/freebl/shvfy.c')
-rw-r--r--security/nss/lib/freebl/shvfy.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/shvfy.c b/security/nss/lib/freebl/shvfy.c
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index 000000000..5c5aad8b1
--- /dev/null
+++ b/security/nss/lib/freebl/shvfy.c
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+
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * 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 the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+/* $Id$ */
+
+#include "shsign.h"
+#include "prlink.h"
+#include "prio.h"
+#include "blapi.h"
+#include "seccomon.h"
+#include "stdio.h"
+#include "prmem.h"
+
+/* #define DEBUG_SHVERIFY 1 */
+
+static char *
+mkCheckFileName(const char *libName)
+{
+ int ln_len = PORT_Strlen(libName);
+ char *output = PORT_Alloc(ln_len+sizeof(SGN_SUFFIX));
+ int index = ln_len + 1 - sizeof("."SHLIB_SUFFIX);
+
+ if ((index > 0) &&
+ (PORT_Strncmp(&libName[index],
+ "."SHLIB_SUFFIX,sizeof("."SHLIB_SUFFIX)) == 0)) {
+ ln_len = index;
+ }
+ PORT_Memcpy(output,libName,ln_len);
+ PORT_Memcpy(&output[ln_len],SGN_SUFFIX,sizeof(SGN_SUFFIX));
+ return output;
+}
+
+static int
+decodeInt(unsigned char *buf)
+{
+ return (buf[3]) | (buf[2] << 8) | (buf[1] << 16) | (buf[0] << 24);
+}
+
+static SECStatus
+readItem(PRFileDesc *fd, SECItem *item)
+{
+ unsigned char buf[4];
+ int bytesRead;
+
+
+ bytesRead = PR_Read(fd, buf, 4);
+ if (bytesRead != 4) {
+ return SECFailure;
+ }
+ item->len = decodeInt(buf);
+
+ item->data = PORT_Alloc(item->len);
+ if (item->data == NULL) {
+ item->len = 0;
+ return SECFailure;
+ }
+ bytesRead = PR_Read(fd, item->data, item->len);
+ if (bytesRead != item->len) {
+ PORT_Free(item->data);
+ item->data = NULL;
+ item->len = 0;
+ return SECFailure;
+ }
+ return SECSuccess;
+}
+
+PRBool
+BLAPI_SHVerify(const char *name, PRFuncPtr addr)
+{
+ /* find our shared library name */
+ char *shName = PR_GetLibraryFilePathname(name, addr);
+ char *checkName = NULL;
+ PRFileDesc *checkFD = NULL;
+ PRFileDesc *shFD = NULL;
+ SHA1Context *hashcx = NULL;
+ SECItem signature = { 0, NULL, 0 };
+ SECItem hash;
+ int bytesRead, offset;
+ SECStatus rv;
+ DSAPublicKey key;
+ int count;
+
+ PRBool result = PR_FALSE; /* if anything goes wrong,
+ * the signature does not verify */
+ unsigned char buf[512];
+ unsigned char hashBuf[SHA1_LENGTH];
+
+ PORT_Memset(&key,0,sizeof(key));
+ hash.data = hashBuf;
+ hash.len = sizeof(hashBuf);
+
+ if (!shName) {
+ goto loser;
+ }
+
+ /* figure out the name of our check file */
+ checkName = mkCheckFileName(shName);
+ if (!checkName) {
+ goto loser;
+ }
+
+ /* open the check File */
+ checkFD = PR_Open(checkName, PR_RDONLY, 0);
+ if (checkFD == NULL) {
+#ifdef DEBUG_SHVERIFY
+ fprintf(stderr, "Failed to open the check file %s: (%d, %d)\n",
+ checkName, (int)PR_GetError(), (int)PR_GetOSError());
+#endif /* DEBUG_SHVERIFY */
+ goto loser;
+ }
+
+ /* read and Verify the headerthe header */
+ bytesRead = PR_Read(checkFD, buf, 12);
+ if (bytesRead != 12) {
+ goto loser;
+ }
+ if ((buf[0] != NSS_SIGN_CHK_MAGIC1) || (buf[1] != NSS_SIGN_CHK_MAGIC2)) {
+ goto loser;
+ }
+ if ((buf[2] != NSS_SIGN_CHK_MAJOR_VERSION) ||
+ (buf[3] < NSS_SIGN_CHK_MINOR_VERSION)) {
+ goto loser;
+ }
+#ifdef notdef
+ if (decodeInt(&buf[8]) != CKK_DSA) {
+ goto loser;
+ }
+#endif
+
+ /* seek past any future header extensions */
+ offset = decodeInt(&buf[4]);
+ PR_Seek(checkFD, offset, PR_SEEK_SET);
+
+ /* read the key */
+ rv = readItem(checkFD,&key.params.prime);
+ if (rv != SECSuccess) {
+ goto loser;
+ }
+ rv = readItem(checkFD,&key.params.subPrime);
+ if (rv != SECSuccess) {
+ goto loser;
+ }
+ rv = readItem(checkFD,&key.params.base);
+ if (rv != SECSuccess) {
+ goto loser;
+ }
+ rv = readItem(checkFD,&key.publicValue);
+ if (rv != SECSuccess) {
+ goto loser;
+ }
+ /* read the siganture */
+ rv = readItem(checkFD,&signature);
+ if (rv != SECSuccess) {
+ goto loser;
+ }
+
+ /* done with the check file */
+ PR_Close(checkFD);
+ checkFD = NULL;
+
+ /* open our library file */
+ shFD = PR_Open(shName, PR_RDONLY, 0);
+ if (shFD == NULL) {
+#ifdef DEBUG_SHVERIFY
+ fprintf(stderr, "Failed to open the library file %s: (%d, %d)\n",
+ shName, (int)PR_GetError(), (int)PR_GetOSError());
+#endif /* DEBUG_SHVERIFY */
+ goto loser;
+ }
+
+ /* hash our library file with SHA1 */
+ hashcx = SHA1_NewContext();
+ if (hashcx == NULL) {
+ goto loser;
+ }
+ SHA1_Begin(hashcx);
+
+ count = 0;
+ while ((bytesRead = PR_Read(shFD, buf, sizeof(buf))) > 0) {
+ SHA1_Update(hashcx, buf, bytesRead);
+ count += bytesRead;
+ }
+ PR_Close(shFD);
+ shFD = NULL;
+
+ SHA1_End(hashcx, hash.data, &hash.len, hash.len);
+
+
+ /* verify the hash against the check file */
+ if (DSA_VerifyDigest(&key, &signature, &hash) == SECSuccess) {
+ result = PR_TRUE;
+ }
+#ifdef DEBUG_SHVERIFY
+ {
+ int i,j;
+ fprintf(stderr,"File %s: %d bytes\n",shName, count);
+ fprintf(stderr," hash: %d bytes\n", hash.len);
+#define STEP 10
+ for (i=0; i < hash.len; i += STEP) {
+ fprintf(stderr," ");
+ for (j=0; j < STEP && (i+j) < hash.len; j++) {
+ fprintf(stderr," %02x", hash.data[i+j]);
+ }
+ fprintf(stderr,"\n");
+ }
+ fprintf(stderr," signature: %d bytes\n", signature.len);
+ for (i=0; i < signature.len; i += STEP) {
+ fprintf(stderr," ");
+ for (j=0; j < STEP && (i+j) < signature.len; j++) {
+ fprintf(stderr," %02x", signature.data[i+j]);
+ }
+ fprintf(stderr,"\n");
+ }
+ fprintf(stderr,"Verified : %s\n",result?"TRUE": "FALSE");
+ }
+#endif /* DEBUG_SHVERIFY */
+
+
+loser:
+ if (shName != NULL) {
+ PR_Free(shName);
+ }
+ if (checkName != NULL) {
+ PORT_Free(checkName);
+ }
+ if (checkFD != NULL) {
+ PR_Close(checkFD);
+ }
+ if (shFD != NULL) {
+ PR_Close(shFD);
+ }
+ if (hashcx != NULL) {
+ SHA1_DestroyContext(hashcx,PR_TRUE);
+ }
+ if (signature.data != NULL) {
+ PORT_Free(signature.data);
+ }
+ if (key.params.prime.data != NULL) {
+ PORT_Free(key.params.prime.data);
+ }
+ if (key.params.subPrime.data != NULL) {
+ PORT_Free(key.params.subPrime.data);
+ }
+ if (key.params.base.data != NULL) {
+ PORT_Free(key.params.base.data);
+ }
+ if (key.publicValue.data != NULL) {
+ PORT_Free(key.publicValue.data);
+ }
+
+ return result;
+}
+
+PRBool
+BLAPI_VerifySelf(const char *name)
+{
+ /* to separate shlib to verify if name is NULL */
+ if (name == NULL) {
+ return PR_TRUE;
+ }
+ return BLAPI_SHVerify(name, (PRFuncPtr) decodeInt);
+}
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