Delete bundled copy of NSS and replace with README.

nss/lib/freebl/shvfy.c

Index: nss/lib/freebl/shvfy.c
diff --git a/nss/lib/freebl/shvfy.c b/nss/lib/freebl/shvfy.c
deleted file mode 100644
index 33714b89b96b3b5b06208dba913a7763e0730e5a..0000000000000000000000000000000000000000
--- a/nss/lib/freebl/shvfy.c
+++ /dev/null
@@ -1,525 +0,0 @@
-
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifdef FREEBL_NO_DEPEND
-#include "stubs.h"
-#endif
-
-#include "shsign.h"
-#include "prlink.h"
-#include "prio.h"
-#include "blapi.h"
-#include "seccomon.h"
-#include "stdio.h"
-#include "prmem.h"
-#include "hasht.h"
-#include "pqg.h"
-
-/*
- * Most modern version of Linux support a speed optimization scheme where an
- * application called prelink modifies programs and shared libraries to quickly
- * load if they fit into an already designed address space. In short, prelink
- * scans the list of programs and libraries on your system, assigns them a
- * predefined space in the the address space, then provides the fixups to the
- * library.
-
- * The modification of the shared library is correctly detected by the freebl
- * FIPS checksum scheme where we check a signed hash of the library against the
- * library itself.
- * 
- * The prelink command itself can reverse the process of modification and
- * output the prestine shared library as it was before prelink made it's
- * changes. If FREEBL_USE_PRELINK is set Freebl uses prelink to output the
- * original copy of the shared library before prelink modified it.
- */
-#ifdef FREEBL_USE_PRELINK
-#ifndef FREELB_PRELINK_COMMAND
-#define FREEBL_PRELINK_COMMAND "/usr/sbin/prelink -u -o -"
-#endif
-#include "private/pprio.h"
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-
-/*
- * This function returns an NSPR PRFileDesc * which the caller can read to
- * obtain the prestine value of the shared library, before any OS related
- * changes to it (usually address fixups). 
- *
- * If prelink is installed, this
- * file descriptor is a pipe connecting the output of 
- *            /usr/sbin/prelink -u -o - {Library}
- * and *pid returns the process id of the prelink child.
- *
- * If prelink is not installed, it returns a normal readonly handle to the
- * library itself and *pid is set to '0'.
- */
-PRFileDesc *
-bl_OpenUnPrelink(const char *shName, int *pid)
-{
-    char *command= strdup(FREEBL_PRELINK_COMMAND);
-    char *argString = NULL;
-    char  **argv = NULL;
-    char *shNameArg = NULL;
-    char *cp;
-    pid_t child;
-    int argc = 0, argNext = 0;
-    struct stat statBuf;
-    int pipefd[2] = {-1,-1};
-    int ret;
-
-    *pid = 0;
-
-    /* make sure the prelink command exists first. If not, fall back to
-     * just reading the file */
-    for (cp = command; *cp ; cp++) {
-	if (*cp == ' ') {
-	    *cp++ = 0;
-	    argString = cp;
-	    break;
-        }
-    }
-    memset (&statBuf, 0, sizeof(statBuf));
-    /* stat the file, follow the link */
-    ret = stat(command, &statBuf);
-    if (ret < 0) {
-	free(command);
-	return PR_Open(shName, PR_RDONLY, 0);
-    }
-    /* file exits, make sure it's an executable */
-    if (!S_ISREG(statBuf.st_mode) || 
-			((statBuf.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH)) == 0)) {
-	free(command);
-	return PR_Open(shName, PR_RDONLY, 0);
-    }
-
-    /* OK, the prelink command exists and looks correct, use it */
-    /* build the arglist while we can still malloc */
-    /* count the args if any */
-    if (argString && *argString) {
-	/* argString may have leading spaces, strip them off*/
-	for (cp = argString; *cp && *cp == ' '; cp++);
-	argString = cp;
-	if (*cp) {
-	    /* there is at least one arg.. */
-	    argc = 1;
-	}
-
-        /* count the rest: Note there is no provision for escaped
-         * spaces here */
-	for (cp = argString; *cp ; cp++) {
-	    if (*cp == ' ') {
-		while (*cp && *cp == ' ') cp++;
-		if (*cp) argc++;
-	    }
-	}
-    }
-
-    /* add the additional args: argv[0] (command), shName, NULL*/
-    argc += 3;
-    argv = PORT_NewArray(char *, argc);
-    if (argv == NULL) {
-	goto loser;
-    }
-
-    /* fill in the arglist */
-    argv[argNext++] = command;
-    if (argString && *argString) {
-	argv[argNext++] = argString;
-	for (cp = argString; *cp; cp++) {
-	    if (*cp == ' ') {
-		*cp++ = 0;
-		while (*cp && *cp == ' ') cp++;
-		if (*cp) argv[argNext++] = cp;
-	    }
-	}
-    }
-    /* exec doesn't advertise taking const char **argv, do the paranoid
-     * copy */
-    shNameArg = strdup(shName);
-    if (shNameArg == NULL) {
-	goto loser;
-    }
-    argv[argNext++] = shNameArg;
-    argv[argNext++] = 0;
-    
-    ret = pipe(pipefd);
-    if (ret < 0) {
-	goto loser;
-    }
-
-    /* use vfork() so we don't trigger the pthread_at_fork() handlers */
-    child = vfork();
-    if (child < 0) goto loser;
-    if (child == 0) {
-	/* set up the file descriptors */
-	/* if we need to support BSD, this will need to be an open of 
-	 * /dev/null and dup2(nullFD, 0)*/
-	close(0);
-	/* associate pipefd[1] with stdout */
-	if (pipefd[1] != 1) dup2(pipefd[1], 1);
-	close(2);
-	close(pipefd[0]);
-	/* should probably close the other file descriptors? */
-
-
-	execv(command, argv);
-	/* avoid at_exit() handlers */
-	_exit(1); /* shouldn't reach here except on an error */
-    }
-    close(pipefd[1]);
-    pipefd[1] = -1;
-
-    /* this is safe because either vfork() as full fork() semantics, and thus
-     * already has it's own address space, or because vfork() has paused
-     * the parent util the exec or exit */
-    free(command);
-    free(shNameArg);
-    PORT_Free(argv);
-
-    *pid = child;
-
-    return PR_ImportPipe(pipefd[0]);
-
-loser:
-    if (pipefd[0] != -1) {
-	close(pipefd[0]);
-    }
-    if (pipefd[1] != -1) {
-	close(pipefd[1]);
-    }
-    free(command);
-    free(shNameArg);
-    PORT_Free(argv);
-
-    return NULL;
-}
-
-/*
- * bl_CloseUnPrelink -
- *
- * This closes the file descripter and reaps and children openned and crated by
- * b;_OpenUnprelink. It's primary difference between it and just close is
- * that it calls wait on the pid if one is supplied, preventing zombie children
- * from hanging around.
- */
-void
-bl_CloseUnPrelink( PRFileDesc *file, int pid)
-{
-    /* close the file descriptor */
-    PR_Close(file);
-    /* reap the child */
-    if (pid) {
-	waitpid(pid, NULL, 0);
-    }
-}
-#endif
-
-/* #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;
-}
-
-/*
- * Define PSEUDO_FIPS if you can't do FIPS software integrity test (e.g.,
- * if you're using NSS as static libraries), but want to conform to the
- * rest of the FIPS requirements.
- */
-#ifdef NSS_STATIC
-#define PSEUDO_FIPS
-#endif
-
-PRBool
-BLAPI_SHVerify(const char *name, PRFuncPtr addr)
-{
-#ifdef PSEUDO_FIPS
-    return PR_TRUE;  /* a lie, hence *pseudo* FIPS */
-#else
-    PRBool result = PR_FALSE; /* if anything goes wrong,
-			       * the signature does not verify */
-    /* find our shared library name */
-    char *shName = PR_GetLibraryFilePathname(name, addr);
-    if (!shName) {
-	goto loser;
-    }
-    result = BLAPI_SHVerifyFile(shName);
-
-loser:
-    if (shName != NULL) {
-	PR_Free(shName);
-    }
-
-    return result;
-#endif  /* PSEUDO_FIPS */
-}
-
-PRBool
-BLAPI_SHVerifyFile(const char *shName)
-{
-#ifdef PSEUDO_FIPS
-    return PR_TRUE;  /* a lie, hence *pseudo* FIPS */
-#else
-    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 (!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;
-
-    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;
-#endif  /* PSEUDO_FIPS */
-}
-
-PRBool
-BLAPI_VerifySelf(const char *name)
-{
-    if (name == NULL) {
-	/*
-	 * If name is NULL, freebl is statically linked into softoken.
-	 * softoken will call BLAPI_SHVerify next to verify itself.
-	 */
-	return PR_TRUE;
-    }
-    return BLAPI_SHVerify(name, (PRFuncPtr) decodeInt);
-}