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MasterPassword/platform-independent/cli-c/cli/mpw-cli.c

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#include <stdio.h>
#include <unistd.h>
#include <sys/stat.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
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#include <sysexits.h>
#if defined(READLINE)
#include <readline/readline.h>
#elif defined(EDITLINE)
#include <histedit.h>
#endif
#include "mpw-algorithm.h"
#include "mpw-util.h"
#include "mpw-marshall.h"
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#ifndef MP_VERSION
#define MP_VERSION ?
#endif
#define MP_ENV_fullName "MP_FULLNAME"
#define MP_ENV_algorithm "MP_ALGORITHM"
#define MP_ENV_format "MP_FORMAT"
static void usage() {
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inf( ""
" Master Password v%s\n"
" https://masterpasswordapp.com\n\n", stringify_def( MP_VERSION ) );
inf( ""
"Usage:\n"
" mpw [-u|-U full-name] [-t pw-type] [-c counter] [-a algorithm] [-s value]\n"
" [-p purpose] [-C context] [-f|-F format] [-R 0|1] [-v|-q] [-h] site-name\n\n" );
inf( ""
" -u full-name Specify the full name of the user.\n"
" -u checks the master password against the config,\n"
" -U allows updating to a new master password.\n"
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" Defaults to %s in env or prompts.\n\n", MP_ENV_fullName );
trc( ""
" -M master-pw Specify the master password of the user.\n"
" This is not a safe method of passing the master password,\n"
" only use it for non-secret passwords, such as for tests.\n\n" );
inf( ""
" -t pw-type Specify the password's template.\n"
" Defaults to 'long' (-p a), 'name' (-p i) or 'phrase' (-p r).\n"
" x, maximum | 20 characters, contains symbols.\n"
" l, long | Copy-friendly, 14 characters, symbols.\n"
" m, medium | Copy-friendly, 8 characters, symbols.\n"
" b, basic | 8 characters, no symbols.\n"
" s, short | Copy-friendly, 4 characters, no symbols.\n"
" i, pin | 4 numbers.\n"
" n, name | 9 letter name.\n"
" p, phrase | 20 character sentence.\n"
" K, key | encryption key (set key size -s bits).\n"
" P, personal | saved personal password (save with -s pw).\n\n" );
inf( ""
" -P value The parameter value.\n"
" -p i | The login name for the site.\n"
" -t K | The size of they key to generate, in bits (eg. 256).\n"
" -t P | The personal password to encrypt.\n\n" );
inf( ""
" -c counter The value of the counter.\n"
" Defaults to 1.\n\n" );
inf( ""
" -a version The algorithm version to use, %d - %d.\n"
" Defaults to %s in env or %d.\n\n",
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MPAlgorithmVersionFirst, MPAlgorithmVersionLast, MP_ENV_algorithm, MPAlgorithmVersionCurrent );
inf( ""
" -p purpose The purpose of the generated token.\n"
" Defaults to 'auth'.\n"
" a, auth | An authentication token such as a password.\n"
" i, ident | An identification token such as a username.\n"
" r, rec | A recovery token such as a security answer.\n\n" );
inf( ""
" -C context A purpose-specific context.\n"
" Defaults to empty.\n"
" -p a | -\n"
" -p i | -\n"
" -p r | Most significant word in security question.\n\n" );
inf( ""
" -f|F format The mpsites format to use for reading/writing site parameters.\n"
" -F forces the use of the given format,\n"
" -f allows fallback/migration.\n"
" Defaults to %s in env or json, falls back to plain.\n"
" n, none | No file\n"
" f, flat | ~/.mpw.d/Full Name.%s\n"
" j, json | ~/.mpw.d/Full Name.%s\n\n",
MP_ENV_format, mpw_marshall_format_extension( MPMarshallFormatFlat ), mpw_marshall_format_extension( MPMarshallFormatJSON ) );
inf( ""
" -R redacted Whether to save the mpsites in redacted format or not.\n"
" Defaults to 1, redacted.\n\n" );
inf( ""
" -v Increase output verbosity (can be repeated).\n"
" -q Decrease output verbosity (can be repeated).\n\n" );
inf( ""
" ENVIRONMENT\n\n"
" %-14s | The full name of the user (see -u).\n"
" %-14s | The default algorithm version (see -a).\n\n",
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MP_ENV_fullName, MP_ENV_algorithm );
exit( 0 );
}
static const char *mpw_getenv(const char *variableName) {
char *envBuf = getenv( variableName );
return envBuf? strdup( envBuf ): NULL;
}
static const char *mpw_getline(const char *prompt) {
fprintf( stderr, "%s ", prompt );
char *buf = NULL;
size_t bufSize = 0;
ssize_t lineSize = getline( &buf, &bufSize, stdin );
if (lineSize <= 1) {
free( buf );
return NULL;
}
// Remove the newline.
buf[lineSize - 1] = '\0';
return buf;
}
static const char *mpw_getpass(const char *prompt) {
char *passBuf = getpass( prompt );
if (!passBuf)
return NULL;
char *buf = strdup( passBuf );
bzero( passBuf, strlen( passBuf ) );
return buf;
}
static const char *mpw_path(const char *prefix, const char *extension) {
// Resolve user's home directory.
char *homeDir = NULL;
if (!homeDir)
if ((homeDir = getenv( "HOME" )))
homeDir = strdup( homeDir );
if (!homeDir)
if ((homeDir = getenv( "USERPROFILE" )))
homeDir = strdup( homeDir );
if (!homeDir) {
const char *homeDrive = getenv( "HOMEDRIVE" ), *homePath = getenv( "HOMEPATH" );
if (homeDrive && homePath)
homeDir = strdup( mpw_str( "%s%s", homeDrive, homePath ) );
}
if (!homeDir) {
struct passwd *passwd = getpwuid( getuid() );
if (passwd)
homeDir = strdup( passwd->pw_dir );
}
if (!homeDir)
homeDir = getcwd( NULL, 0 );
// Compose filename.
char *path = strdup( mpw_str( "%s.%s", prefix, extension ) );
// This is a filename, remove all potential directory separators.
for (char *slash; (slash = strstr( path, "/" )); *slash = '_');
// Compose pathname.
if (homeDir) {
const char *homePath = mpw_str( "%s/.mpw.d/%s", homeDir, path );
free( homeDir );
free( path );
if (homePath)
path = strdup( homePath );
}
return path;
}
static bool mpw_mkdirs(const char *filePath) {
if (!filePath)
return false;
char *pathEnd = strrchr( filePath, '/' );
char *path = pathEnd? strndup( filePath, pathEnd - filePath ): strdup( filePath );
if (!path)
return false;
// Save the cwd and for absolute paths, start at the root.
char *cwd = getcwd( NULL, 0 );
if (*filePath == '/')
chdir( "/" );
// Walk the path.
bool success = true;
for (char *dirName = strtok( path, "/" ); success && dirName; dirName = strtok( NULL, "/" )) {
if (!strlen( dirName ))
continue;
success &= (mkdir( dirName, 0700 ) != ERR || errno == EEXIST) && chdir( dirName ) != ERR;
}
free( path );
if (chdir( cwd ) == ERR)
wrn( "Could not restore cwd:\n %s: %s\n", cwd, strerror( errno ) );
free( cwd );
return success;
}
int main(const int argc, char *const argv[]) {
// CLI defaults.
bool allowPasswordUpdate = false, sitesFormatFixed = false;
// Read the environment.
const char *fullNameArg = NULL, *masterPasswordArg = NULL, *siteNameArg = NULL;
const char *resultTypeArg = NULL, *resultParamArg = NULL, *siteCounterArg = NULL, *algorithmVersionArg = NULL;
const char *keyPurposeArg = NULL, *keyContextArg = NULL, *sitesFormatArg = NULL, *sitesRedactedArg = NULL;
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fullNameArg = mpw_getenv( MP_ENV_fullName );
algorithmVersionArg = mpw_getenv( MP_ENV_algorithm );
sitesFormatArg = mpw_getenv( MP_ENV_format );
// Read the command-line options.
for (int opt; (opt = getopt( argc, argv, "u:U:M:t:P:c:a:p:C:f:F:R:vqh" )) != EOF;)
switch (opt) {
case 'u':
fullNameArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
allowPasswordUpdate = false;
break;
case 'U':
fullNameArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
allowPasswordUpdate = true;
break;
case 'M':
// Passing your master password via the command-line is insecure. Testing purposes only.
masterPasswordArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
break;
case 't':
resultTypeArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
break;
case 'P':
resultParamArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
break;
case 'c':
siteCounterArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
break;
case 'a':
algorithmVersionArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
break;
case 'p':
keyPurposeArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
break;
case 'C':
keyContextArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
break;
case 'f':
sitesFormatArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
sitesFormatFixed = false;
break;
case 'F':
sitesFormatArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
sitesFormatFixed = true;
break;
case 'R':
sitesRedactedArg = optarg && strlen( optarg )? strdup( optarg ): NULL;
break;
case 'v':
++mpw_verbosity;
break;
case 'q':
--mpw_verbosity;
break;
case 'h':
usage();
break;
case '?':
switch (optopt) {
case 'u':
ftl( "Missing full name to option: -%c\n", optopt );
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return EX_USAGE;
case 't':
ftl( "Missing type name to option: -%c\n", optopt );
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return EX_USAGE;
case 'c':
ftl( "Missing counter value to option: -%c\n", optopt );
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return EX_USAGE;
default:
ftl( "Unknown option: -%c\n", optopt );
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return EX_USAGE;
}
default:
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ftl( "Unexpected option: %c\n", opt );
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return EX_USAGE;
}
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if (optind < argc && argv[optind])
siteNameArg = strdup( argv[optind] );
// Determine fullName, siteName & masterPassword.
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const char *fullName = NULL, *masterPassword = NULL, *siteName = NULL;
if (!(fullNameArg && (fullName = strdup( fullNameArg ))) &&
!(fullName = mpw_getline( "Your full name:" ))) {
ftl( "Missing full name.\n" );
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mpw_free_strings( &fullName, &masterPassword, &siteName, NULL );
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return EX_DATAERR;
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}
if (!(masterPasswordArg && (masterPassword = strdup( masterPasswordArg ))))
while (!masterPassword || !strlen( masterPassword ))
masterPassword = mpw_getpass( "Your master password: " );
if (!(siteNameArg && (siteName = strdup( siteNameArg ))) &&
!(siteName = mpw_getline( "Site name:" ))) {
ftl( "Missing site name.\n" );
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mpw_free_strings( &fullName, &masterPassword, &siteName, NULL );
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return EX_DATAERR;
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}
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MPMarshallFormat sitesFormat = MPMarshallFormatDefault;
if (sitesFormatArg) {
sitesFormat = mpw_formatWithName( sitesFormatArg );
if (ERR == (int)sitesFormat) {
ftl( "Invalid sites format: %s\n", sitesFormatArg );
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mpw_free_strings( &fullName, &masterPassword, &siteName, NULL );
return EX_USAGE;
}
}
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MPKeyPurpose keyPurpose = MPKeyPurposeAuthentication;
if (keyPurposeArg) {
keyPurpose = mpw_purposeWithName( keyPurposeArg );
if (ERR == (int)keyPurpose) {
ftl( "Invalid purpose: %s\n", keyPurposeArg );
return EX_USAGE;
}
}
const char *keyContext = NULL;
if (keyContextArg)
keyContext = strdup( keyContextArg );
// Find the user's sites file.
FILE *sitesFile = NULL;
const char *sitesPath = mpw_path( fullName, mpw_marshall_format_extension( sitesFormat ) );
if (!sitesPath || !(sitesFile = fopen( sitesPath, "r" ))) {
dbg( "Couldn't open configuration file:\n %s: %s\n", sitesPath, strerror( errno ) );
// Try to fall back to the flat format.
if (!sitesFormatFixed) {
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mpw_free_string( &sitesPath );
sitesPath = mpw_path( fullName, mpw_marshall_format_extension( MPMarshallFormatFlat ) );
if (sitesPath && (sitesFile = fopen( sitesPath, "r" )))
sitesFormat = MPMarshallFormatFlat;
else
dbg( "Couldn't open configuration file:\n %s: %s\n", sitesPath, strerror( errno ) );
}
}
// Load the user object from file.
MPMarshalledUser *user = NULL;
MPMarshalledSite *site = NULL;
MPMarshalledQuestion *question = NULL;
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if (!sitesFile)
mpw_free_string( &sitesPath );
else {
// Read file.
size_t blockSize = 4096, bufSize = 0, bufOffset = 0, readSize = 0;
char *sitesInputData = NULL;
while ((mpw_realloc( &sitesInputData, &bufSize, blockSize )) &&
(bufOffset += (readSize = fread( sitesInputData + bufOffset, 1, blockSize, sitesFile ))) &&
(readSize == blockSize));
if (ferror( sitesFile ))
wrn( "Error while reading configuration file:\n %s: %d\n", sitesPath, ferror( sitesFile ) );
fclose( sitesFile );
// Parse file.
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MPMarshallInfo *sitesInputInfo = mpw_marshall_read_info( sitesInputData );
MPMarshallFormat sitesInputFormat = sitesFormatArg? sitesFormat: sitesInputInfo->format;
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MPMarshallError marshallError = { .type = MPMarshallSuccess };
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mpw_marshal_info_free( &sitesInputInfo );
user = mpw_marshall_read( sitesInputData, sitesInputFormat, masterPassword, &marshallError );
if (marshallError.type == MPMarshallErrorMasterPassword) {
// Incorrect master password.
if (!allowPasswordUpdate) {
ftl( "Incorrect master password according to configuration:\n %s: %s\n", sitesPath, marshallError.description );
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mpw_marshal_free( &user );
mpw_free( &sitesInputData, bufSize );
mpw_free_strings( &sitesPath, &fullName, &masterPassword, &siteName, NULL );
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return EX_DATAERR;
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}
// Update user's master password.
while (marshallError.type == MPMarshallErrorMasterPassword) {
inf( "Given master password does not match configuration.\n" );
inf( "To update the configuration with this new master password, first confirm the old master password.\n" );
const char *importMasterPassword = NULL;
while (!importMasterPassword || !strlen( importMasterPassword ))
importMasterPassword = mpw_getpass( "Old master password: " );
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mpw_marshal_free( &user );
user = mpw_marshall_read( sitesInputData, sitesInputFormat, importMasterPassword, &marshallError );
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mpw_free_string( &importMasterPassword );
}
if (user) {
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mpw_free_string( &user->masterPassword );
user->masterPassword = strdup( masterPassword );
}
}
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mpw_free( &sitesInputData, bufSize );
if (!user || marshallError.type != MPMarshallSuccess) {
err( "Couldn't parse configuration file:\n %s: %s\n", sitesPath, marshallError.description );
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mpw_marshal_free( &user );
mpw_free_string( &sitesPath );
}
}
if (!user)
user = mpw_marshall_user( fullName, masterPassword, MPAlgorithmVersionCurrent );
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mpw_free_strings( &fullName, &masterPassword, NULL );
// Load the site object.
for (size_t s = 0; s < user->sites_count; ++s) {
site = &user->sites[s];
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if (strcmp( siteName, site->name ) == 0)
// Found.
break;
site = NULL;
}
if (!site)
site = mpw_marshall_site( user, siteName, MPResultTypeDefault, MPCounterValueDefault, user->algorithm );
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mpw_free_string( &siteName );
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// Load the question object.
switch (keyPurpose) {
case MPKeyPurposeAuthentication:
case MPKeyPurposeIdentification:
break;
case MPKeyPurposeRecovery:
for (size_t q = 0; q < site->questions_count; ++q) {
question = &site->questions[q];
if ((!keyContext && !strlen( question->keyword )) ||
(keyContext && strcmp( keyContext, question->keyword ) != 0))
// Found.
break;
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question = NULL;
}
if (!question)
question = mpw_marshal_question( site, keyContext );
break;
}
// Initialize purpose-specific operation parameters.
MPResultType resultType = MPResultTypeDefault;
MPCounterValue siteCounter = MPCounterValueDefault;
const char *purposeResult = NULL, *resultState = NULL;
switch (keyPurpose) {
case MPKeyPurposeAuthentication: {
purposeResult = "password";
resultType = site->type;
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resultState = site->content? strdup( site->content ): NULL;
siteCounter = site->counter;
break;
}
case MPKeyPurposeIdentification: {
purposeResult = "login";
resultType = site->loginType;
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resultState = site->loginContent? strdup( site->loginContent ): NULL;
siteCounter = MPCounterValueInitial;
break;
}
case MPKeyPurposeRecovery: {
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mpw_free_string( &keyContext );
purposeResult = "answer";
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keyContext = question->keyword? strdup( question->keyword ): NULL;
resultType = question->type;
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resultState = question->content? strdup( question->content ): NULL;
siteCounter = MPCounterValueInitial;
break;
}
}
// Override operation parameters from command-line arguments.
if (resultTypeArg) {
resultType = mpw_typeWithName( resultTypeArg );
if (ERR == (int)resultType) {
ftl( "Invalid type: %s\n", resultTypeArg );
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mpw_marshal_free( &user );
mpw_free_strings( &sitesPath, &resultState, &keyContext, NULL );
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return EX_USAGE;
}
if (!(resultType & MPSiteFeatureAlternative)) {
switch (keyPurpose) {
case MPKeyPurposeAuthentication:
site->type = resultType;
break;
case MPKeyPurposeIdentification:
site->loginType = resultType;
break;
case MPKeyPurposeRecovery:
question->type = resultType;
break;
}
}
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}
if (siteCounterArg) {
long long int siteCounterInt = atoll( siteCounterArg );
if (siteCounterInt < MPCounterValueFirst || siteCounterInt > MPCounterValueLast) {
ftl( "Invalid site counter: %s\n", siteCounterArg );
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mpw_marshal_free( &user );
mpw_free_strings( &sitesPath, &resultState, &keyContext, NULL );
return EX_USAGE;
}
switch (keyPurpose) {
case MPKeyPurposeAuthentication:
siteCounter = site->counter = (MPCounterValue)siteCounterInt;
break;
case MPKeyPurposeIdentification:
case MPKeyPurposeRecovery:
// NOTE: counter for login & question is not persisted.
break;
}
}
const char *resultParam = NULL;
if (resultParamArg)
resultParam = strdup( resultParamArg );
if (algorithmVersionArg) {
int algorithmVersionInt = atoi( algorithmVersionArg );
if (algorithmVersionInt < MPAlgorithmVersionFirst || algorithmVersionInt > MPAlgorithmVersionLast) {
ftl( "Invalid algorithm version: %s\n", algorithmVersionArg );
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mpw_marshal_free( &user );
mpw_free_strings( &sitesPath, &resultState, &keyContext, &resultParam, NULL );
return EX_USAGE;
}
site->algorithm = (MPAlgorithmVersion)algorithmVersionInt;
}
if (sitesRedactedArg)
user->redacted = strcmp( sitesRedactedArg, "1" ) == 0;
else if (!user->redacted)
wrn( "Sites configuration is not redacted. Use -R 1 to change this.\n" );
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mpw_free_strings( &fullNameArg, &masterPasswordArg, &siteNameArg, NULL );
mpw_free_strings( &resultTypeArg, &resultParamArg, &siteCounterArg, &algorithmVersionArg, NULL );
mpw_free_strings( &keyPurposeArg, &keyContextArg, &sitesFormatArg, &sitesRedactedArg, NULL );
// Operation summary.
const char *identicon = mpw_identicon( user->fullName, user->masterPassword );
if (!identicon)
wrn( "Couldn't determine identicon.\n" );
dbg( "-----------------\n" );
dbg( "fullName : %s\n", user->fullName );
trc( "masterPassword : %s\n", user->masterPassword );
dbg( "identicon : %s\n", identicon );
dbg( "sitesFormat : %s%s\n", mpw_nameForFormat( sitesFormat ), sitesFormatFixed? " (fixed)": "" );
dbg( "sitesPath : %s\n", sitesPath );
dbg( "siteName : %s\n", site->name );
dbg( "siteCounter : %u\n", siteCounter );
dbg( "resultType : %s (%u)\n", mpw_nameForType( resultType ), resultType );
dbg( "resultParam : %s\n", resultParam );
dbg( "keyPurpose : %s (%u)\n", mpw_nameForPurpose( keyPurpose ), keyPurpose );
dbg( "keyContext : %s\n", keyContext );
dbg( "algorithmVersion : %u\n", site->algorithm );
dbg( "-----------------\n\n" );
inf( "%s's %s for %s:\n[ %s ]: ", user->fullName, purposeResult, site->name, identicon );
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mpw_free_strings( &identicon, &sitesPath, NULL );
// Determine master key.
MPMasterKey masterKey = mpw_masterKey(
user->fullName, user->masterPassword, site->algorithm );
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if (!masterKey) {
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ftl( "Couldn't derive master key.\n" );
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mpw_marshal_free( &user );
mpw_free_strings( &resultState, &keyContext, &resultParam, NULL );
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return EX_SOFTWARE;
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}
// Update state.
if (resultParam && resultType & MPResultTypeClassStateful) {
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mpw_free_string( &resultState );
if (!(resultState = mpw_siteState( masterKey, site->name, siteCounter,
keyPurpose, keyContext, resultType, resultParam, site->algorithm ))) {
ftl( "Couldn't encrypt site result.\n" );
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mpw_free( &masterKey, MPMasterKeySize );
mpw_marshal_free( &user );
mpw_free_strings( &resultState, &keyContext, &resultParam, NULL );
return EX_SOFTWARE;
}
inf( "(state) %s => ", resultState );
switch (keyPurpose) {
case MPKeyPurposeAuthentication: {
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mpw_free_string( &site->content );
site->content = strdup( resultState );
break;
}
case MPKeyPurposeIdentification: {
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mpw_free_string( &site->loginContent );
site->loginContent = strdup( resultState );
break;
}
case MPKeyPurposeRecovery: {
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mpw_free_string( &question->content );
question->content = strdup( resultState );
break;
}
}
// resultParam is consumed.
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mpw_free_string( &resultParam );
}
// Second phase resultParam defaults to state.
if (!resultParam && resultState)
resultParam = strdup( resultState );
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mpw_free_string( &resultState );
// Generate result.
const char *result = mpw_siteResult( masterKey, site->name, siteCounter,
keyPurpose, keyContext, resultType, resultParam, site->algorithm );
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mpw_free( &masterKey, MPMasterKeySize );
mpw_free_strings( &keyContext, &resultParam, NULL );
if (!result) {
ftl( "Couldn't generate site result.\n" );
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mpw_marshal_free( &user );
return EX_SOFTWARE;
}
fprintf( stdout, "%s\n", result );
if (site->url)
inf( "See: %s\n", site->url );
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mpw_free_string( &result );
// Update usage metadata.
site->lastUsed = user->lastUsed = time( NULL );
site->uses++;
// Update the mpsites file.
if (sitesFormat != MPMarshallFormatNone) {
if (!sitesFormatFixed)
sitesFormat = MPMarshallFormatDefault;
sitesPath = mpw_path( user->fullName, mpw_marshall_format_extension( sitesFormat ) );
dbg( "Updating: %s (%s)\n", sitesPath, mpw_nameForFormat( sitesFormat ) );
if (!sitesPath || !mpw_mkdirs( sitesPath ) || !(sitesFile = fopen( sitesPath, "w" )))
wrn( "Couldn't create updated configuration file:\n %s: %s\n", sitesPath, strerror( errno ) );
else {
char *buf = NULL;
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MPMarshallError marshallError = { .type = MPMarshallSuccess };
if (!mpw_marshall_write( &buf, sitesFormat, user, &marshallError ) || marshallError.type != MPMarshallSuccess)
wrn( "Couldn't encode updated configuration file:\n %s: %s\n", sitesPath, marshallError.description );
else if (fwrite( buf, sizeof( char ), strlen( buf ), sitesFile ) != strlen( buf ))
wrn( "Error while writing updated configuration file:\n %s: %d\n", sitesPath, ferror( sitesFile ) );
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mpw_free_string( &buf );
fclose( sitesFile );
}
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mpw_free_string( &sitesPath );
}
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mpw_marshal_free( &user );
return 0;
}