125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Client
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* Passphrase Handling Utils
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*
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* Copyright 2011 Shea Levy <shea@shealevy.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <freerdp/utils/passphrase.h>
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#ifdef _WIN32
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char* freerdp_passphrase_read(const char* prompt, char* buf, size_t bufsiz, int from_stdin)
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{
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errno=ENOSYS;
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return NULL;
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}
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#else
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <termios.h>
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#include <unistd.h>
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#include <freerdp/utils/signal.h>
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char* freerdp_passphrase_read(const char* prompt, char* buf, size_t bufsiz, int from_stdin)
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{
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char read_char;
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char* buf_iter;
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char term_name[L_ctermid];
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int term_file, write_file;
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ssize_t nbytes;
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size_t read_bytes = 0;
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if (bufsiz == 0)
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{
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errno = EINVAL;
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return NULL;
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}
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ctermid(term_name);
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if(from_stdin || strcmp(term_name, "") == 0
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|| (term_file = open(term_name, O_RDWR)) == -1)
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{
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write_file = STDERR_FILENO;
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terminal_fildes = STDIN_FILENO;
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}
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else
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{
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write_file = term_file;
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terminal_fildes = term_file;
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}
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if (tcgetattr(terminal_fildes, &orig_flags) != -1)
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{
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new_flags = orig_flags;
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new_flags.c_lflag &= ~ECHO;
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new_flags.c_lflag |= ECHONL;
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terminal_needs_reset = 1;
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if (tcsetattr(terminal_fildes, TCSAFLUSH, &new_flags) == -1)
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terminal_needs_reset = 0;
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}
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if (write(write_file, prompt, strlen(prompt)) == (ssize_t) -1)
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goto error;
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buf_iter = buf;
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while ((nbytes = read(terminal_fildes, &read_char, sizeof read_char)) == (sizeof read_char))
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{
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if (read_char == '\n')
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break;
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if (read_bytes < (bufsiz - (size_t) 1))
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{
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read_bytes++;
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*buf_iter = read_char;
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buf_iter++;
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}
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}
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*buf_iter = '\0';
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buf_iter = NULL;
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read_char = '\0';
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if (nbytes == (ssize_t) -1)
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goto error;
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if (terminal_needs_reset)
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{
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if (tcsetattr(terminal_fildes, TCSAFLUSH, &orig_flags) == -1)
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goto error;
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terminal_needs_reset = 0;
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}
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if (terminal_fildes != STDIN_FILENO)
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{
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if (close(terminal_fildes) == -1)
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goto error;
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}
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return buf;
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error:
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{
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int saved_errno = errno;
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buf_iter = NULL;
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read_char = '\0';
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if (terminal_needs_reset)
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tcsetattr(terminal_fildes, TCSAFLUSH, &orig_flags);
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if (terminal_fildes != STDIN_FILENO)
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close(terminal_fildes);
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errno = saved_errno;
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return NULL;
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}
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}
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#endif
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