NSSLOWInitContext *
NSSLOW_Init(void)
{
#ifdef FREEBL_NO_DEPEND
(void)FREEBL_InitStubs();
#endif
/* make sure the FIPS product is installed if we are trying to
* go into FIPS mode */
if (nsslow_GetFIPSEnabled()) {
if (BL_FIPSEntryOK(PR_TRUE) != SECSuccess) {
PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
post_failed = PR_TRUE;
return NULL;
}
}
post_failed = PR_FALSE;
return &dummyContext;
}
static PRBool
blapi_SHVerifyFile(const char *shName, PRBool self)
{
char *checkName = NULL;
PRFileDesc *checkFD = NULL;
PRFileDesc *shFD = NULL;
void *hashcx = NULL;
const SECHashObject *hashObj = NULL;
SECItem signature = { 0, NULL, 0 };
SECItem hash;
int bytesRead, offset;
SECStatus rv;
DSAPublicKey key;
int count;
#ifdef FREEBL_USE_PRELINK
int pid = 0;
#endif
PRBool result = PR_FALSE; /* if anything goes wrong,
* the signature does not verify */
unsigned char buf[4096];
unsigned char hashBuf[HASH_LENGTH_MAX];
PORT_Memset(&key,0,sizeof(key));
hash.data = hashBuf;
hash.len = sizeof(hashBuf);
/* If our integrity check was never ran or failed, fail any other
* integrity checks to prevent any token going into FIPS mode. */
if (!self && (BL_FIPSEntryOK(PR_FALSE) != SECSuccess)) {
return PR_FALSE;
}
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]);
if (PR_Seek(checkFD, offset, PR_SEEK_SET) < 0) {
goto loser;
}
/* 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;
hashObj = HASH_GetRawHashObject(PQG_GetHashType(&key.params));
if (hashObj == NULL) {
goto loser;
}
/* open our library file */
#ifdef FREEBL_USE_PRELINK
shFD = bl_OpenUnPrelink(shName,&pid);
#else
shFD = PR_Open(shName, PR_RDONLY, 0);
#endif
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 = hashObj->create();
if (hashcx == NULL) {
goto loser;
}
hashObj->begin(hashcx);
count = 0;
while ((bytesRead = PR_Read(shFD, buf, sizeof(buf))) > 0) {
hashObj->update(hashcx, buf, bytesRead);
count += bytesRead;
}
#ifdef FREEBL_USE_PRELINK
bl_CloseUnPrelink(shFD, pid);
#else
PR_Close(shFD);
#endif
shFD = NULL;
hashObj->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 (checkName != NULL) {
PORT_Free(checkName);
}
if (checkFD != NULL) {
PR_Close(checkFD);
}
if (shFD != NULL) {
PR_Close(shFD);
}
if (hashcx != NULL) {
if (hashObj) {
hashObj->destroy(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;
}
