version 1.31, 2000/05/08 17:12:15 |
version 1.31.2.3, 2000/11/08 21:31:07 |
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/* |
/* |
* |
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* readconf.c |
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* |
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* Author: Tatu Ylonen <ylo@cs.hut.fi> |
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
* |
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* All rights reserved |
* All rights reserved |
* |
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* Created: Sat Apr 22 00:03:10 1995 ylo |
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* |
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* Functions for reading the configuration files. |
* Functions for reading the configuration files. |
* |
* |
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* As far as I am concerned, the code I have written for this software |
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* can be used freely for any purpose. Any derived versions of this |
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* software must be clearly marked as such, and if the derived work is |
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* incompatible with the protocol description in the RFC file, it must be |
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* called by a name other than "ssh" or "Secure Shell". |
*/ |
*/ |
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#include "includes.h" |
#include "includes.h" |
RCSID("$Id$"); |
RCSID("$OpenBSD$"); |
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#include "ssh.h" |
#include "ssh.h" |
#include "cipher.h" |
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#include "readconf.h" |
#include "readconf.h" |
#include "match.h" |
#include "match.h" |
#include "xmalloc.h" |
#include "xmalloc.h" |
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oBadOption, |
oBadOption, |
oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication, |
oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication, |
oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh, |
oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh, |
oSkeyAuthentication, |
oSkeyAuthentication, oXAuthLocation, |
#ifdef KRB4 |
#ifdef KRB4 |
oKerberosAuthentication, |
oKerberosAuthentication, |
#endif /* KRB4 */ |
#endif /* KRB4 */ |
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oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, |
oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, |
oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication, |
oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication, |
oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oIdentityFile2, |
oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oIdentityFile2, |
oGlobalKnownHostsFile2, oUserKnownHostsFile2, oDSAAuthentication |
oGlobalKnownHostsFile2, oUserKnownHostsFile2, oDSAAuthentication, |
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oKbdInteractiveAuthentication, oKbdInteractiveDevices |
} OpCodes; |
} OpCodes; |
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/* Textual representations of the tokens. */ |
/* Textual representations of the tokens. */ |
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} keywords[] = { |
} keywords[] = { |
{ "forwardagent", oForwardAgent }, |
{ "forwardagent", oForwardAgent }, |
{ "forwardx11", oForwardX11 }, |
{ "forwardx11", oForwardX11 }, |
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{ "xauthlocation", oXAuthLocation }, |
{ "gatewayports", oGatewayPorts }, |
{ "gatewayports", oGatewayPorts }, |
{ "useprivilegedport", oUsePrivilegedPort }, |
{ "useprivilegedport", oUsePrivilegedPort }, |
{ "rhostsauthentication", oRhostsAuthentication }, |
{ "rhostsauthentication", oRhostsAuthentication }, |
{ "passwordauthentication", oPasswordAuthentication }, |
{ "passwordauthentication", oPasswordAuthentication }, |
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{ "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
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{ "kbdinteractivedevices", oKbdInteractiveDevices }, |
{ "rsaauthentication", oRSAAuthentication }, |
{ "rsaauthentication", oRSAAuthentication }, |
{ "dsaauthentication", oDSAAuthentication }, |
{ "dsaauthentication", oDSAAuthentication }, |
{ "skeyauthentication", oSkeyAuthentication }, |
{ "skeyauthentication", oSkeyAuthentication }, |
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{ NULL, 0 } |
{ NULL, 0 } |
}; |
}; |
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/* Characters considered whitespace in strtok calls. */ |
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#define WHITESPACE " \t\r\n" |
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/* |
/* |
* Adds a local TCP/IP port forward to options. Never returns if there is an |
* Adds a local TCP/IP port forward to options. Never returns if there is an |
* error. |
* error. |
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char *line, const char *filename, int linenum, |
char *line, const char *filename, int linenum, |
int *activep) |
int *activep) |
{ |
{ |
char buf[256], *cp, *string, **charptr, *cp2; |
char buf[256], *s, *string, **charptr, *endofnumber, *keyword, *arg; |
int opcode, *intptr, value; |
int opcode, *intptr, value; |
u_short fwd_port, fwd_host_port; |
u_short fwd_port, fwd_host_port; |
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/* Skip leading whitespace. */ |
s = line; |
cp = line + strspn(line, WHITESPACE); |
/* Get the keyword. (Each line is supposed to begin with a keyword). */ |
if (!*cp || *cp == '\n' || *cp == '#') |
keyword = strdelim(&s); |
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/* Ignore leading whitespace. */ |
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if (*keyword == '\0') |
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keyword = strdelim(&s); |
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if (!*keyword || *keyword == '\n' || *keyword == '#') |
return 0; |
return 0; |
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/* Get the keyword. (Each line is supposed to begin with a keyword). */ |
opcode = parse_token(keyword, filename, linenum); |
cp = strtok(cp, WHITESPACE); |
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opcode = parse_token(cp, filename, linenum); |
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switch (opcode) { |
switch (opcode) { |
case oBadOption: |
case oBadOption: |
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case oForwardAgent: |
case oForwardAgent: |
intptr = &options->forward_agent; |
intptr = &options->forward_agent; |
parse_flag: |
parse_flag: |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); |
value = 0; /* To avoid compiler warning... */ |
value = 0; /* To avoid compiler warning... */ |
if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0) |
if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
value = 1; |
value = 1; |
else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0) |
else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
value = 0; |
value = 0; |
else |
else |
fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); |
fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); |
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intptr = &options->password_authentication; |
intptr = &options->password_authentication; |
goto parse_flag; |
goto parse_flag; |
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case oKbdInteractiveAuthentication: |
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intptr = &options->kbd_interactive_authentication; |
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goto parse_flag; |
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case oKbdInteractiveDevices: |
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charptr = &options->kbd_interactive_devices; |
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goto parse_string; |
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case oDSAAuthentication: |
case oDSAAuthentication: |
intptr = &options->dsa_authentication; |
intptr = &options->dsa_authentication; |
goto parse_flag; |
goto parse_flag; |
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case oStrictHostKeyChecking: |
case oStrictHostKeyChecking: |
intptr = &options->strict_host_key_checking; |
intptr = &options->strict_host_key_checking; |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing yes/no argument.", |
fatal("%.200s line %d: Missing yes/no argument.", |
filename, linenum); |
filename, linenum); |
value = 0; /* To avoid compiler warning... */ |
value = 0; /* To avoid compiler warning... */ |
if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0) |
if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
value = 1; |
value = 1; |
else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0) |
else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) |
value = 0; |
value = 0; |
else if (strcmp(cp, "ask") == 0) |
else if (strcmp(arg, "ask") == 0) |
value = 2; |
value = 2; |
else |
else |
fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); |
fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); |
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case oIdentityFile: |
case oIdentityFile: |
case oIdentityFile2: |
case oIdentityFile2: |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
if (*activep) { |
if (*activep) { |
intptr = (opcode == oIdentityFile) ? |
intptr = (opcode == oIdentityFile) ? |
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charptr = (opcode == oIdentityFile) ? |
charptr = (opcode == oIdentityFile) ? |
&options->identity_files[*intptr] : |
&options->identity_files[*intptr] : |
&options->identity_files2[*intptr]; |
&options->identity_files2[*intptr]; |
*charptr = xstrdup(cp); |
*charptr = xstrdup(arg); |
*intptr = *intptr + 1; |
*intptr = *intptr + 1; |
} |
} |
break; |
break; |
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case oXAuthLocation: |
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charptr=&options->xauth_location; |
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goto parse_string; |
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case oUser: |
case oUser: |
charptr = &options->user; |
charptr = &options->user; |
parse_string: |
parse_string: |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
if (*activep && *charptr == NULL) |
if (*activep && *charptr == NULL) |
*charptr = xstrdup(cp); |
*charptr = xstrdup(arg); |
break; |
break; |
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case oGlobalKnownHostsFile: |
case oGlobalKnownHostsFile: |
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case oProxyCommand: |
case oProxyCommand: |
charptr = &options->proxy_command; |
charptr = &options->proxy_command; |
string = xstrdup(""); |
string = xstrdup(""); |
while ((cp = strtok(NULL, WHITESPACE)) != NULL) { |
while ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
string = xrealloc(string, strlen(string) + strlen(cp) + 2); |
string = xrealloc(string, strlen(string) + strlen(arg) + 2); |
strcat(string, " "); |
strcat(string, " "); |
strcat(string, cp); |
strcat(string, arg); |
} |
} |
if (*activep && *charptr == NULL) |
if (*activep && *charptr == NULL) |
*charptr = string; |
*charptr = string; |
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case oPort: |
case oPort: |
intptr = &options->port; |
intptr = &options->port; |
parse_int: |
parse_int: |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
if (cp[0] < '0' || cp[0] > '9') |
if (arg[0] < '0' || arg[0] > '9') |
fatal("%.200s line %d: Bad number.", filename, linenum); |
fatal("%.200s line %d: Bad number.", filename, linenum); |
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/* Octal, decimal, or hex format? */ |
/* Octal, decimal, or hex format? */ |
value = strtol(cp, &cp2, 0); |
value = strtol(arg, &endofnumber, 0); |
if (cp == cp2) |
if (arg == endofnumber) |
fatal("%.200s line %d: Bad number.", filename, linenum); |
fatal("%.200s line %d: Bad number.", filename, linenum); |
if (*activep && *intptr == -1) |
if (*activep && *intptr == -1) |
*intptr = value; |
*intptr = value; |
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case oCipher: |
case oCipher: |
intptr = &options->cipher; |
intptr = &options->cipher; |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
value = cipher_number(cp); |
if (!arg || *arg == '\0') |
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fatal("%.200s line %d: Missing argument.", filename, linenum); |
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value = cipher_number(arg); |
if (value == -1) |
if (value == -1) |
fatal("%.200s line %d: Bad cipher '%s'.", |
fatal("%.200s line %d: Bad cipher '%s'.", |
filename, linenum, cp ? cp : "<NONE>"); |
filename, linenum, arg ? arg : "<NONE>"); |
if (*activep && *intptr == -1) |
if (*activep && *intptr == -1) |
*intptr = value; |
*intptr = value; |
break; |
break; |
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case oCiphers: |
case oCiphers: |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!ciphers_valid(cp)) |
if (!arg || *arg == '\0') |
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fatal("%.200s line %d: Missing argument.", filename, linenum); |
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if (!ciphers_valid(arg)) |
fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", |
filename, linenum, cp ? cp : "<NONE>"); |
filename, linenum, arg ? arg : "<NONE>"); |
if (*activep && options->ciphers == NULL) |
if (*activep && options->ciphers == NULL) |
options->ciphers = xstrdup(cp); |
options->ciphers = xstrdup(arg); |
break; |
break; |
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case oProtocol: |
case oProtocol: |
intptr = &options->protocol; |
intptr = &options->protocol; |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
value = proto_spec(cp); |
if (!arg || *arg == '\0') |
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fatal("%.200s line %d: Missing argument.", filename, linenum); |
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value = proto_spec(arg); |
if (value == SSH_PROTO_UNKNOWN) |
if (value == SSH_PROTO_UNKNOWN) |
fatal("%.200s line %d: Bad protocol spec '%s'.", |
fatal("%.200s line %d: Bad protocol spec '%s'.", |
filename, linenum, cp ? cp : "<NONE>"); |
filename, linenum, arg ? arg : "<NONE>"); |
if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
if (*activep && *intptr == SSH_PROTO_UNKNOWN) |
*intptr = value; |
*intptr = value; |
break; |
break; |
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case oLogLevel: |
case oLogLevel: |
intptr = (int *) &options->log_level; |
intptr = (int *) &options->log_level; |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
value = log_level_number(cp); |
value = log_level_number(arg); |
if (value == (LogLevel) - 1) |
if (value == (LogLevel) - 1) |
fatal("%.200s line %d: unsupported log level '%s'\n", |
fatal("%.200s line %d: unsupported log level '%s'\n", |
filename, linenum, cp ? cp : "<NONE>"); |
filename, linenum, arg ? arg : "<NONE>"); |
if (*activep && (LogLevel) * intptr == -1) |
if (*activep && (LogLevel) * intptr == -1) |
*intptr = (LogLevel) value; |
*intptr = (LogLevel) value; |
break; |
break; |
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case oRemoteForward: |
case oRemoteForward: |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
if (cp[0] < '0' || cp[0] > '9') |
if (arg[0] < '0' || arg[0] > '9') |
fatal("%.200s line %d: Badly formatted port number.", |
fatal("%.200s line %d: Badly formatted port number.", |
filename, linenum); |
filename, linenum); |
fwd_port = atoi(cp); |
fwd_port = atoi(arg); |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing second argument.", |
fatal("%.200s line %d: Missing second argument.", |
filename, linenum); |
filename, linenum); |
if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
fatal("%.200s line %d: Badly formatted host:port.", |
fatal("%.200s line %d: Badly formatted host:port.", |
filename, linenum); |
filename, linenum); |
if (*activep) |
if (*activep) |
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break; |
break; |
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case oLocalForward: |
case oLocalForward: |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
if (cp[0] < '0' || cp[0] > '9') |
if (arg[0] < '0' || arg[0] > '9') |
fatal("%.200s line %d: Badly formatted port number.", |
fatal("%.200s line %d: Badly formatted port number.", |
filename, linenum); |
filename, linenum); |
fwd_port = atoi(cp); |
fwd_port = atoi(arg); |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing second argument.", |
fatal("%.200s line %d: Missing second argument.", |
filename, linenum); |
filename, linenum); |
if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2) |
fatal("%.200s line %d: Badly formatted host:port.", |
fatal("%.200s line %d: Badly formatted host:port.", |
filename, linenum); |
filename, linenum); |
if (*activep) |
if (*activep) |
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case oHost: |
case oHost: |
*activep = 0; |
*activep = 0; |
while ((cp = strtok(NULL, WHITESPACE)) != NULL) |
while ((arg = strdelim(&s)) != NULL && *arg != '\0') |
if (match_pattern(host, cp)) { |
if (match_pattern(host, arg)) { |
debug("Applying options for %.100s", cp); |
debug("Applying options for %.100s", arg); |
*activep = 1; |
*activep = 1; |
break; |
break; |
} |
} |
/* Avoid garbage check below, as strtok already returned NULL. */ |
/* Avoid garbage check below, as strdelim is done. */ |
return 0; |
return 0; |
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case oEscapeChar: |
case oEscapeChar: |
intptr = &options->escape_char; |
intptr = &options->escape_char; |
cp = strtok(NULL, WHITESPACE); |
arg = strdelim(&s); |
if (!cp) |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
if (cp[0] == '^' && cp[2] == 0 && |
if (arg[0] == '^' && arg[2] == 0 && |
(unsigned char) cp[1] >= 64 && (unsigned char) cp[1] < 128) |
(unsigned char) arg[1] >= 64 && (unsigned char) arg[1] < 128) |
value = (unsigned char) cp[1] & 31; |
value = (unsigned char) arg[1] & 31; |
else if (strlen(cp) == 1) |
else if (strlen(arg) == 1) |
value = (unsigned char) cp[0]; |
value = (unsigned char) arg[0]; |
else if (strcmp(cp, "none") == 0) |
else if (strcmp(arg, "none") == 0) |
value = -2; |
value = -2; |
else { |
else { |
fatal("%.200s line %d: Bad escape character.", |
fatal("%.200s line %d: Bad escape character.", |
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} |
} |
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/* Check that there is no garbage at end of line. */ |
/* Check that there is no garbage at end of line. */ |
if (strtok(NULL, WHITESPACE) != NULL) |
if ((arg = strdelim(&s)) != NULL && *arg != '\0') |
fatal("%.200s line %d: garbage at end of line.", |
{ |
filename, linenum); |
fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
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filename, linenum, arg); |
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} |
return 0; |
return 0; |
} |
} |
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memset(options, 'X', sizeof(*options)); |
memset(options, 'X', sizeof(*options)); |
options->forward_agent = -1; |
options->forward_agent = -1; |
options->forward_x11 = -1; |
options->forward_x11 = -1; |
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options->xauth_location = NULL; |
options->gateway_ports = -1; |
options->gateway_ports = -1; |
options->use_privileged_port = -1; |
options->use_privileged_port = -1; |
options->rhosts_authentication = -1; |
options->rhosts_authentication = -1; |
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options->afs_token_passing = -1; |
options->afs_token_passing = -1; |
#endif |
#endif |
options->password_authentication = -1; |
options->password_authentication = -1; |
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options->kbd_interactive_authentication = -1; |
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options->kbd_interactive_devices = NULL; |
options->rhosts_rsa_authentication = -1; |
options->rhosts_rsa_authentication = -1; |
options->fallback_to_rsh = -1; |
options->fallback_to_rsh = -1; |
options->use_rsh = -1; |
options->use_rsh = -1; |
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fill_default_options(Options * options) |
fill_default_options(Options * options) |
{ |
{ |
if (options->forward_agent == -1) |
if (options->forward_agent == -1) |
options->forward_agent = 1; |
options->forward_agent = 0; |
if (options->forward_x11 == -1) |
if (options->forward_x11 == -1) |
options->forward_x11 = 0; |
options->forward_x11 = 0; |
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#ifdef XAUTH_PATH |
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if (options->xauth_location == NULL) |
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options->xauth_location = XAUTH_PATH; |
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#endif /* XAUTH_PATH */ |
if (options->gateway_ports == -1) |
if (options->gateway_ports == -1) |
options->gateway_ports = 0; |
options->gateway_ports = 0; |
if (options->use_privileged_port == -1) |
if (options->use_privileged_port == -1) |
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#endif /* AFS */ |
#endif /* AFS */ |
if (options->password_authentication == -1) |
if (options->password_authentication == -1) |
options->password_authentication = 1; |
options->password_authentication = 1; |
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if (options->kbd_interactive_authentication == -1) |
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options->kbd_interactive_authentication = 0; |
if (options->rhosts_rsa_authentication == -1) |
if (options->rhosts_rsa_authentication == -1) |
options->rhosts_rsa_authentication = 1; |
options->rhosts_rsa_authentication = 1; |
if (options->fallback_to_rsh == -1) |
if (options->fallback_to_rsh == -1) |
options->fallback_to_rsh = 1; |
options->fallback_to_rsh = 0; |
if (options->use_rsh == -1) |
if (options->use_rsh == -1) |
options->use_rsh = 0; |
options->use_rsh = 0; |
if (options->batch_mode == -1) |
if (options->batch_mode == -1) |