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/* 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/. */
/* With the exception of GetPasswordString, this file was
copied from NSS's cmd/lib/secutil.c hg revision 8f011395145e */
#include "nss_secutil.h"
#include "prprf.h"
#ifdef XP_WIN
# include <io.h>
#else
# include <unistd.h>
#endif
#if defined(_WINDOWS)
char* quiet_fgets(char* buf, int length, FILE* input) {
int c;
char* end = buf;
/* fflush (input); */
memset(buf, 0, length);
if (!isatty(fileno(input))) {
return fgets(buf, length, input);
}
while (1) {
# if defined(_WIN32_WCE)
c = getchar(); /* gets a character from stdin */
# else
c = getch(); /* getch gets a character from the console */
# endif
if (c == '\b') {
if (end > buf) end--;
}
else if (--length > 0)
*end++ = c;
if (!c || c == '\n' || c == '\r') break;
}
return buf;
}
#endif
char* GetPasswordString(void* arg, char* prompt) {
FILE* input = stdin;
char phrase[200] = {'\0'};
int isInputTerminal = isatty(fileno(stdin));
#ifndef _WINDOWS
if (isInputTerminal) {
static char consoleName[] = {
# ifdef XP_UNIX
"/dev/tty"
# else
"CON:"
# endif
};
input = fopen(consoleName, "r");
if (input == NULL) {
fprintf(stderr, "Error opening input terminal for read\n");
return NULL;
}
}
#endif
if (isInputTerminal) {
fprintf(stdout, "Please enter your password:\n");
fflush(stdout);
}
if (!QUIET_FGETS(phrase, sizeof(phrase), input)) {
fprintf(stderr, "QUIET_FGETS failed\n");
#ifndef _WINDOWS
if (isInputTerminal) {
fclose(input);
}
#endif
return NULL;
}
if (isInputTerminal) {
fprintf(stdout, "\n");
}
#ifndef _WINDOWS
if (isInputTerminal) {
fclose(input);
}
#endif
/* Strip off the newlines if present */
if (phrase[PORT_Strlen(phrase) - 1] == '\n' ||
phrase[PORT_Strlen(phrase) - 1] == '\r') {
phrase[PORT_Strlen(phrase) - 1] = 0;
}
return (char*)PORT_Strdup(phrase);
}
char* SECU_FilePasswd(PK11SlotInfo* slot, PRBool retry, void* arg) {
char *phrases, *phrase;
PRFileDesc* fd;
int32_t nb;
char* pwFile = arg;
int i;
const long maxPwdFileSize = 4096;
char* tokenName = NULL;
int tokenLen = 0;
if (!pwFile) return 0;
if (retry) {
return 0; /* no good retrying - the files contents will be the same */
}
phrases = PORT_ZAlloc(maxPwdFileSize);
if (!phrases) {
return 0; /* out of memory */
}
fd = PR_Open(pwFile, PR_RDONLY, 0);
if (!fd) {
fprintf(stderr, "No password file \"%s\" exists.\n", pwFile);
PORT_Free(phrases);
return NULL;
}
nb = PR_Read(fd, phrases, maxPwdFileSize);
PR_Close(fd);
if (nb == 0) {
fprintf(stderr, "password file contains no data\n");
PORT_Free(phrases);
return NULL;
}
if (slot) {
tokenName = PK11_GetTokenName(slot);
if (tokenName) {
tokenLen = PORT_Strlen(tokenName);
}
}
i = 0;
do {
int startphrase = i;
int phraseLen;
/* handle the Windows EOL case */
while (phrases[i] != '\r' && phrases[i] != '\n' && i < nb) i++;
/* terminate passphrase */
if (i < nb) {
phrases[i++] = '\0';
}
/* clean up any EOL before the start of the next passphrase */
while ((i < nb) && (phrases[i] == '\r' || phrases[i] == '\n')) {
phrases[i++] = '\0';
}
/* now analyze the current passphrase */
phrase = &phrases[startphrase];
if (!tokenName) break;
if (PORT_Strncmp(phrase, tokenName, tokenLen)) continue;
phraseLen = PORT_Strlen(phrase);
if (phraseLen < (tokenLen + 1)) continue;
if (phrase[tokenLen] != ':') continue;
phrase = &phrase[tokenLen + 1];
break;
} while (i < nb);
phrase = PORT_Strdup((char*)phrase);
PORT_Free(phrases);
return phrase;
}
char* SECU_GetModulePassword(PK11SlotInfo* slot, PRBool retry, void* arg) {
char prompt[255];
secuPWData* pwdata = (secuPWData*)arg;
secuPWData pwnull = {PW_NONE, 0};
secuPWData pwxtrn = {PW_EXTERNAL, "external"};
char* pw;
if (pwdata == NULL) pwdata = &pwnull;
if (PK11_ProtectedAuthenticationPath(slot)) {
pwdata = &pwxtrn;
}
if (retry && pwdata->source != PW_NONE) {
PR_fprintf(PR_STDERR, "Incorrect password/PIN entered.\n");
return NULL;
}
switch (pwdata->source) {
case PW_NONE:
sprintf(prompt,
"Enter Password or Pin for \"%s\":", PK11_GetTokenName(slot));
return GetPasswordString(NULL, prompt);
case PW_FROMFILE:
/* Instead of opening and closing the file every time, get the pw
* once, then keep it in memory (duh).
*/
pw = SECU_FilePasswd(slot, retry, pwdata->data);
pwdata->source = PW_PLAINTEXT;
pwdata->data = PL_strdup(pw);
/* it's already been dup'ed */
return pw;
case PW_EXTERNAL:
sprintf(prompt,
"Press Enter, then enter PIN for \"%s\" on external device.\n",
PK11_GetTokenName(slot));
pw = GetPasswordString(NULL, prompt);
if (pw) {
memset(pw, 0, PORT_Strlen(pw));
PORT_Free(pw);
}
/* Fall Through */
case PW_PLAINTEXT:
return PL_strdup(pwdata->data);
default:
break;
}
PR_fprintf(PR_STDERR, "Password check failed: No password found.\n");
return NULL;
}
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