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Improve example authentication.

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This commit is contained in:
Andreas Schneider
2009-10-15 17:56:03 +02:00
parent b3dfd5cffc
commit 86620fc991
1 changed files with 48 additions and 37 deletions
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85
examples/authentication.c
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@@ -65,50 +65,61 @@ int authenticate_kbdint(ssh_session session){
} }
int authenticate_console(ssh_session session){ int authenticate_console(ssh_session session){
int auth; int rc;
int methods; int method;
char *password; char *password;
char *banner; char *banner;
ssh_userauth_none(session, NULL); // Try to authenticate
methods = ssh_auth_list(session); rc = ssh_userauth_none(session, NULL);
printf("supported auth methods: "); if (rc == SSH_AUTH_ERROR) {
if (methods & SSH_AUTH_METHOD_PUBLICKEY) { perror("Authentication failed.");
printf("publickey"); return rc;
} }
if (methods & SSH_AUTH_METHOD_INTERACTIVE) {
printf(", keyboard-interactive");
}
if (methods & SSH_AUTH_METHOD_PASSWORD) {
printf(", password");
}
printf("\n");
auth=ssh_userauth_autopubkey(session, NULL); method = ssh_auth_list(session);
if(auth==SSH_AUTH_ERROR){ while (rc != SSH_AUTH_SUCCESS) {
return auth;
// Try to authenticate with public key first
if (method & SSH_AUTH_METHOD_PUBLICKEY) {
rc = ssh_userauth_autopubkey(session, NULL);
if (rc == SSH_AUTH_ERROR) {
perror("Authentication failed.");
return rc;
} else if (rc == SSH_AUTH_SUCCESS) {
break;
}
}
// Try to authenticate with keyboard interactive";
if (method & SSH_AUTH_METHOD_INTERACTIVE) {
rc = authenticate_kbdint(session);
if (rc == SSH_AUTH_ERROR) {
perror("Authentication failed.");
return rc;
} else if (rc == SSH_AUTH_SUCCESS) {
break;
}
}
password=getpass("Password: ");
// Try to authenticate with password
if (method & SSH_AUTH_METHOD_PASSWORD) {
rc = ssh_userauth_password(session, NULL, password);
if (rc == SSH_AUTH_ERROR) {
perror("Authentication failed.");
return rc;
} else if (rc == SSH_AUTH_SUCCESS) {
break;
}
}
} }
banner=ssh_get_issue_banner(session);
if(banner){ banner = ssh_get_issue_banner(session);
if (banner) {
printf("%s\n",banner); printf("%s\n",banner);
free(banner); free(banner);
} }
if(auth!=SSH_AUTH_SUCCESS && (methods & SSH_AUTH_METHOD_INTERACTIVE)){
auth=authenticate_kbdint(session); return rc;
if(auth==SSH_AUTH_ERROR){
return auth;
}
}
if(auth!=SSH_AUTH_SUCCESS && (methods & SSH_AUTH_METHOD_PASSWORD)){
password=getpass("Password: ");
if(ssh_userauth_password(session,NULL,password) != SSH_AUTH_SUCCESS){
return auth;
}
memset(password,0,strlen(password));
}
if(auth==SSH_AUTH_SUCCESS)
ssh_log(session, SSH_LOG_FUNCTIONS, "Authentication success");
if(auth==SSH_AUTH_PARTIAL)
return SSH_AUTH_DENIED;
return auth;
} }