version 1.14, 2001/02/08 19:30:52 |
version 1.15, 2001/04/18 21:57:41 |
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#include "xmalloc.h" |
#include "xmalloc.h" |
#include "cli.h" |
#include "cli.h" |
#include "readpass.h" |
#include "readpass.h" |
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#include "pathnames.h" |
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#include "log.h" |
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#include "atomicio.h" |
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#include "ssh.h" |
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char * |
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ssh_askpass(char *askpass, char *msg) |
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{ |
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pid_t pid; |
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size_t len; |
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char *nl, *pass; |
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int p[2], status; |
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char buf[1024]; |
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if (fflush(stdout) != 0) |
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error("ssh_askpass: fflush: %s", strerror(errno)); |
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if (askpass == NULL) |
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fatal("internal error: askpass undefined"); |
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if (pipe(p) < 0) |
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fatal("ssh_askpass: pipe: %s", strerror(errno)); |
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if ((pid = fork()) < 0) |
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fatal("ssh_askpass: fork: %s", strerror(errno)); |
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if (pid == 0) { |
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seteuid(getuid()); |
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setuid(getuid()); |
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close(p[0]); |
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if (dup2(p[1], STDOUT_FILENO) < 0) |
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fatal("ssh_askpass: dup2: %s", strerror(errno)); |
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execlp(askpass, askpass, msg, (char *) 0); |
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fatal("ssh_askpass: exec(%s): %s", askpass, strerror(errno)); |
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} |
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close(p[1]); |
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len = read(p[0], buf, sizeof buf); |
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close(p[0]); |
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while (waitpid(pid, &status, 0) < 0) |
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if (errno != EINTR) |
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break; |
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if (len <= 1) |
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return xstrdup(""); |
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nl = strchr(buf, '\n'); |
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if (nl) |
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*nl = '\0'; |
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pass = xstrdup(buf); |
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memset(buf, 0, sizeof(buf)); |
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return pass; |
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} |
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/* |
/* |
* Reads a passphrase from /dev/tty with echo turned off. Returns the |
* Reads a passphrase from /dev/tty with echo turned off. Returns the |
* passphrase (allocated with xmalloc), being very careful to ensure that |
* passphrase (allocated with xmalloc), being very careful to ensure that |
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char * |
char * |
read_passphrase(char *prompt, int from_stdin) |
read_passphrase(char *prompt, int from_stdin) |
{ |
{ |
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char *askpass = NULL; |
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int use_askpass = 0, ttyfd; |
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if (from_stdin) { |
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if (!isatty(STDIN_FILENO)) |
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use_askpass = 1; |
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} else { |
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ttyfd = open("/dev/tty", O_RDWR); |
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if (ttyfd >= 0) |
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close(ttyfd); |
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else |
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use_askpass = 1; |
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} |
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if (use_askpass && getenv("DISPLAY")) { |
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if (getenv(SSH_ASKPASS_ENV)) |
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askpass = getenv(SSH_ASKPASS_ENV); |
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else |
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askpass = _PATH_SSH_ASKPASS_DEFAULT; |
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return ssh_askpass(askpass, prompt); |
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} |
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return cli_read_passphrase(prompt, from_stdin, 0); |
return cli_read_passphrase(prompt, from_stdin, 0); |
} |
} |