version 1.31.2.3, 2000/11/08 21:31:07 |
version 1.31.2.4, 2001/03/12 15:44:13 |
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RCSID("$OpenBSD$"); |
RCSID("$OpenBSD$"); |
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#include "ssh.h" |
#include "ssh.h" |
#include "readconf.h" |
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#include "match.h" |
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#include "xmalloc.h" |
#include "xmalloc.h" |
#include "compat.h" |
#include "compat.h" |
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#include "cipher.h" |
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#include "pathnames.h" |
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#include "log.h" |
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#include "readconf.h" |
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#include "match.h" |
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#include "misc.h" |
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#include "kex.h" |
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#include "mac.h" |
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/* Format of the configuration file: |
/* Format of the configuration file: |
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# Defaults for various options |
# Defaults for various options |
Host * |
Host * |
ForwardAgent no |
ForwardAgent no |
ForwardX11 yes |
ForwardX11 no |
RhostsAuthentication yes |
RhostsAuthentication yes |
PasswordAuthentication yes |
PasswordAuthentication yes |
RSAAuthentication yes |
RSAAuthentication yes |
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oBadOption, |
oBadOption, |
oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication, |
oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication, |
oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh, |
oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh, |
oSkeyAuthentication, oXAuthLocation, |
oChallengeResponseAuthentication, oXAuthLocation, |
#ifdef KRB4 |
#ifdef KRB4 |
oKerberosAuthentication, |
oKerberosAuthentication, |
#endif /* KRB4 */ |
#endif /* KRB4 */ |
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oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, |
oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, |
oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, |
oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, |
oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, |
oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, |
oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication, |
oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, |
oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oIdentityFile2, |
oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, |
oGlobalKnownHostsFile2, oUserKnownHostsFile2, oDSAAuthentication, |
oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, |
oKbdInteractiveAuthentication, oKbdInteractiveDevices |
oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias |
} OpCodes; |
} OpCodes; |
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/* Textual representations of the tokens. */ |
/* Textual representations of the tokens. */ |
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{ "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
{ "kbdinteractiveauthentication", oKbdInteractiveAuthentication }, |
{ "kbdinteractivedevices", oKbdInteractiveDevices }, |
{ "kbdinteractivedevices", oKbdInteractiveDevices }, |
{ "rsaauthentication", oRSAAuthentication }, |
{ "rsaauthentication", oRSAAuthentication }, |
{ "dsaauthentication", oDSAAuthentication }, |
{ "pubkeyauthentication", oPubkeyAuthentication }, |
{ "skeyauthentication", oSkeyAuthentication }, |
{ "dsaauthentication", oPubkeyAuthentication }, /* alias */ |
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{ "challengeresponseauthentication", oChallengeResponseAuthentication }, |
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{ "skeyauthentication", oChallengeResponseAuthentication }, /* alias */ |
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{ "tisauthentication", oChallengeResponseAuthentication }, /* alias */ |
#ifdef KRB4 |
#ifdef KRB4 |
{ "kerberosauthentication", oKerberosAuthentication }, |
{ "kerberosauthentication", oKerberosAuthentication }, |
#endif /* KRB4 */ |
#endif /* KRB4 */ |
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{ "fallbacktorsh", oFallBackToRsh }, |
{ "fallbacktorsh", oFallBackToRsh }, |
{ "usersh", oUseRsh }, |
{ "usersh", oUseRsh }, |
{ "identityfile", oIdentityFile }, |
{ "identityfile", oIdentityFile }, |
{ "identityfile2", oIdentityFile2 }, |
{ "identityfile2", oIdentityFile }, /* alias */ |
{ "hostname", oHostName }, |
{ "hostname", oHostName }, |
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{ "hostkeyalias", oHostKeyAlias }, |
{ "proxycommand", oProxyCommand }, |
{ "proxycommand", oProxyCommand }, |
{ "port", oPort }, |
{ "port", oPort }, |
{ "cipher", oCipher }, |
{ "cipher", oCipher }, |
{ "ciphers", oCiphers }, |
{ "ciphers", oCiphers }, |
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{ "macs", oMacs }, |
{ "protocol", oProtocol }, |
{ "protocol", oProtocol }, |
{ "remoteforward", oRemoteForward }, |
{ "remoteforward", oRemoteForward }, |
{ "localforward", oLocalForward }, |
{ "localforward", oLocalForward }, |
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{ "compressionlevel", oCompressionLevel }, |
{ "compressionlevel", oCompressionLevel }, |
{ "keepalive", oKeepAlives }, |
{ "keepalive", oKeepAlives }, |
{ "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
{ "numberofpasswordprompts", oNumberOfPasswordPrompts }, |
{ "tisauthentication", oTISAuthentication }, |
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{ "loglevel", oLogLevel }, |
{ "loglevel", oLogLevel }, |
{ NULL, 0 } |
{ NULL, 0 } |
}; |
}; |
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static OpCodes |
static OpCodes |
parse_token(const char *cp, const char *filename, int linenum) |
parse_token(const char *cp, const char *filename, int linenum) |
{ |
{ |
unsigned int i; |
u_int i; |
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for (i = 0; keywords[i].name; i++) |
for (i = 0; keywords[i].name; i++) |
if (strcasecmp(cp, keywords[i].name) == 0) |
if (strcasecmp(cp, keywords[i].name) == 0) |
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/* Ignore leading whitespace. */ |
/* Ignore leading whitespace. */ |
if (*keyword == '\0') |
if (*keyword == '\0') |
keyword = strdelim(&s); |
keyword = strdelim(&s); |
if (!*keyword || *keyword == '\n' || *keyword == '#') |
if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') |
return 0; |
return 0; |
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opcode = parse_token(keyword, filename, linenum); |
opcode = parse_token(keyword, filename, linenum); |
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charptr = &options->kbd_interactive_devices; |
charptr = &options->kbd_interactive_devices; |
goto parse_string; |
goto parse_string; |
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case oDSAAuthentication: |
case oPubkeyAuthentication: |
intptr = &options->dsa_authentication; |
intptr = &options->pubkey_authentication; |
goto parse_flag; |
goto parse_flag; |
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case oRSAAuthentication: |
case oRSAAuthentication: |
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intptr = &options->rhosts_rsa_authentication; |
intptr = &options->rhosts_rsa_authentication; |
goto parse_flag; |
goto parse_flag; |
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case oTISAuthentication: |
case oChallengeResponseAuthentication: |
/* fallthrough, there is no difference on the client side */ |
intptr = &options->challenge_reponse_authentication; |
case oSkeyAuthentication: |
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intptr = &options->skey_authentication; |
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goto parse_flag; |
goto parse_flag; |
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#ifdef KRB4 |
#ifdef KRB4 |
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intptr = &options->strict_host_key_checking; |
intptr = &options->strict_host_key_checking; |
arg = strdelim(&s); |
arg = strdelim(&s); |
if (!arg || *arg == '\0') |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing yes/no argument.", |
fatal("%.200s line %d: Missing yes/no/ask argument.", |
filename, linenum); |
filename, linenum); |
value = 0; /* To avoid compiler warning... */ |
value = 0; /* To avoid compiler warning... */ |
if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) |
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goto parse_int; |
goto parse_int; |
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case oIdentityFile: |
case oIdentityFile: |
case oIdentityFile2: |
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arg = strdelim(&s); |
arg = strdelim(&s); |
if (!arg || *arg == '\0') |
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 = &options->num_identity_files; |
&options->num_identity_files : |
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&options->num_identity_files2; |
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if (*intptr >= SSH_MAX_IDENTITY_FILES) |
if (*intptr >= SSH_MAX_IDENTITY_FILES) |
fatal("%.200s line %d: Too many identity files specified (max %d).", |
fatal("%.200s line %d: Too many identity files specified (max %d).", |
filename, linenum, SSH_MAX_IDENTITY_FILES); |
filename, linenum, SSH_MAX_IDENTITY_FILES); |
charptr = (opcode == oIdentityFile) ? |
charptr = &options->identity_files[*intptr]; |
&options->identity_files[*intptr] : |
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&options->identity_files2[*intptr]; |
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*charptr = xstrdup(arg); |
*charptr = xstrdup(arg); |
*intptr = *intptr + 1; |
*intptr = *intptr + 1; |
} |
} |
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charptr = &options->hostname; |
charptr = &options->hostname; |
goto parse_string; |
goto parse_string; |
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case oHostKeyAlias: |
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charptr = &options->host_key_alias; |
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goto parse_string; |
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case oProxyCommand: |
case oProxyCommand: |
charptr = &options->proxy_command; |
charptr = &options->proxy_command; |
string = xstrdup(""); |
string = xstrdup(""); |
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options->ciphers = xstrdup(arg); |
options->ciphers = xstrdup(arg); |
break; |
break; |
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case oMacs: |
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arg = strdelim(&s); |
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if (!arg || *arg == '\0') |
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fatal("%.200s line %d: Missing argument.", filename, linenum); |
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if (!mac_valid(arg)) |
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fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", |
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filename, linenum, arg ? arg : "<NONE>"); |
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if (*activep && options->macs == NULL) |
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options->macs = xstrdup(arg); |
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break; |
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case oProtocol: |
case oProtocol: |
intptr = &options->protocol; |
intptr = &options->protocol; |
arg = strdelim(&s); |
arg = strdelim(&s); |
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if (!arg || *arg == '\0') |
if (!arg || *arg == '\0') |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
fatal("%.200s line %d: Missing argument.", filename, linenum); |
if (arg[0] == '^' && arg[2] == 0 && |
if (arg[0] == '^' && arg[2] == 0 && |
(unsigned char) arg[1] >= 64 && (unsigned char) arg[1] < 128) |
(u_char) arg[1] >= 64 && (u_char) arg[1] < 128) |
value = (unsigned char) arg[1] & 31; |
value = (u_char) arg[1] & 31; |
else if (strlen(arg) == 1) |
else if (strlen(arg) == 1) |
value = (unsigned char) arg[0]; |
value = (u_char) arg[0]; |
else if (strcmp(arg, "none") == 0) |
else if (strcmp(arg, "none") == 0) |
value = -2; |
value = -2; |
else { |
else { |
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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 ((arg = strdelim(&s)) != NULL && *arg != '\0') |
if ((arg = strdelim(&s)) != NULL && *arg != '\0') { |
{ |
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fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
fatal("%.200s line %d: garbage at end of line; \"%.200s\".", |
filename, linenum, arg); |
filename, linenum, arg); |
} |
} |
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options->use_privileged_port = -1; |
options->use_privileged_port = -1; |
options->rhosts_authentication = -1; |
options->rhosts_authentication = -1; |
options->rsa_authentication = -1; |
options->rsa_authentication = -1; |
options->dsa_authentication = -1; |
options->pubkey_authentication = -1; |
options->skey_authentication = -1; |
options->challenge_reponse_authentication = -1; |
#ifdef KRB4 |
#ifdef KRB4 |
options->kerberos_authentication = -1; |
options->kerberos_authentication = -1; |
#endif |
#endif |
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options->number_of_password_prompts = -1; |
options->number_of_password_prompts = -1; |
options->cipher = -1; |
options->cipher = -1; |
options->ciphers = NULL; |
options->ciphers = NULL; |
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options->macs = NULL; |
options->protocol = SSH_PROTO_UNKNOWN; |
options->protocol = SSH_PROTO_UNKNOWN; |
options->num_identity_files = 0; |
options->num_identity_files = 0; |
options->num_identity_files2 = 0; |
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options->hostname = NULL; |
options->hostname = NULL; |
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options->host_key_alias = NULL; |
options->proxy_command = NULL; |
options->proxy_command = NULL; |
options->user = NULL; |
options->user = NULL; |
options->escape_char = -1; |
options->escape_char = -1; |
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void |
void |
fill_default_options(Options * options) |
fill_default_options(Options * options) |
{ |
{ |
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int len; |
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if (options->forward_agent == -1) |
if (options->forward_agent == -1) |
options->forward_agent = 0; |
options->forward_agent = 0; |
if (options->forward_x11 == -1) |
if (options->forward_x11 == -1) |
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options->rhosts_authentication = 1; |
options->rhosts_authentication = 1; |
if (options->rsa_authentication == -1) |
if (options->rsa_authentication == -1) |
options->rsa_authentication = 1; |
options->rsa_authentication = 1; |
if (options->dsa_authentication == -1) |
if (options->pubkey_authentication == -1) |
options->dsa_authentication = 1; |
options->pubkey_authentication = 1; |
if (options->skey_authentication == -1) |
if (options->challenge_reponse_authentication == -1) |
options->skey_authentication = 0; |
options->challenge_reponse_authentication = 0; |
#ifdef KRB4 |
#ifdef KRB4 |
if (options->kerberos_authentication == -1) |
if (options->kerberos_authentication == -1) |
options->kerberos_authentication = 1; |
options->kerberos_authentication = 1; |
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if (options->password_authentication == -1) |
if (options->password_authentication == -1) |
options->password_authentication = 1; |
options->password_authentication = 1; |
if (options->kbd_interactive_authentication == -1) |
if (options->kbd_interactive_authentication == -1) |
options->kbd_interactive_authentication = 0; |
options->kbd_interactive_authentication = 1; |
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) |
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if (options->cipher == -1) |
if (options->cipher == -1) |
options->cipher = SSH_CIPHER_NOT_SET; |
options->cipher = SSH_CIPHER_NOT_SET; |
/* options->ciphers, default set in myproposals.h */ |
/* options->ciphers, default set in myproposals.h */ |
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/* options->macs, default set in myproposals.h */ |
if (options->protocol == SSH_PROTO_UNKNOWN) |
if (options->protocol == SSH_PROTO_UNKNOWN) |
options->protocol = SSH_PROTO_1|SSH_PROTO_2|SSH_PROTO_1_PREFERRED; |
options->protocol = SSH_PROTO_1|SSH_PROTO_2|SSH_PROTO_1_PREFERRED; |
if (options->num_identity_files == 0) { |
if (options->num_identity_files == 0) { |
options->identity_files[0] = |
if (options->protocol & SSH_PROTO_1) { |
xmalloc(2 + strlen(SSH_CLIENT_IDENTITY) + 1); |
len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; |
sprintf(options->identity_files[0], "~/%.100s", SSH_CLIENT_IDENTITY); |
options->identity_files[options->num_identity_files] = |
options->num_identity_files = 1; |
xmalloc(len); |
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snprintf(options->identity_files[options->num_identity_files++], |
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len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); |
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} |
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if (options->protocol & SSH_PROTO_2) { |
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len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; |
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options->identity_files[options->num_identity_files] = |
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xmalloc(len); |
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snprintf(options->identity_files[options->num_identity_files++], |
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len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); |
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} |
} |
} |
if (options->num_identity_files2 == 0) { |
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options->identity_files2[0] = |
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xmalloc(2 + strlen(SSH_CLIENT_ID_DSA) + 1); |
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sprintf(options->identity_files2[0], "~/%.100s", SSH_CLIENT_ID_DSA); |
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options->num_identity_files2 = 1; |
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} |
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if (options->escape_char == -1) |
if (options->escape_char == -1) |
options->escape_char = '~'; |
options->escape_char = '~'; |
if (options->system_hostfile == NULL) |
if (options->system_hostfile == NULL) |
options->system_hostfile = SSH_SYSTEM_HOSTFILE; |
options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE; |
if (options->user_hostfile == NULL) |
if (options->user_hostfile == NULL) |
options->user_hostfile = SSH_USER_HOSTFILE; |
options->user_hostfile = _PATH_SSH_USER_HOSTFILE; |
if (options->system_hostfile2 == NULL) |
if (options->system_hostfile2 == NULL) |
options->system_hostfile2 = SSH_SYSTEM_HOSTFILE2; |
options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2; |
if (options->user_hostfile2 == NULL) |
if (options->user_hostfile2 == NULL) |
options->user_hostfile2 = SSH_USER_HOSTFILE2; |
options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2; |
if (options->log_level == (LogLevel) - 1) |
if (options->log_level == (LogLevel) - 1) |
options->log_level = SYSLOG_LEVEL_INFO; |
options->log_level = SYSLOG_LEVEL_INFO; |
/* options->proxy_command should not be set by default */ |
/* options->proxy_command should not be set by default */ |
/* options->user will be set in the main program if appropriate */ |
/* options->user will be set in the main program if appropriate */ |
/* options->hostname will be set in the main program if appropriate */ |
/* options->hostname will be set in the main program if appropriate */ |
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/* options->host_key_alias should not be set by default */ |
} |
} |