version 1.5, 1999/09/29 21:14:16 |
version 1.9, 1999/11/20 10:02:53 |
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#include "rsa.h" |
#include "rsa.h" |
#include "ssh.h" |
#include "ssh.h" |
#include "xmalloc.h" |
#include "xmalloc.h" |
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#include "fingerprint.h" |
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/* Generated private key. */ |
/* Generated private key. */ |
RSA *private_key; |
RSA *private_key; |
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int quiet = 0; |
int quiet = 0; |
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/* Flag indicating that we just want to see the key fingerprint */ |
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int print_fingerprint = 0; |
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/* This is set to the identity file name if given on the command line. */ |
/* This is set to the identity file name if given on the command line. */ |
char *identity_file = NULL; |
char *identity_file = NULL; |
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/* Perform changing a passphrase. The argument is the passwd structure |
/* Perform changing a passphrase. The argument is the passwd structure |
for the current user. */ |
for the current user. */ |
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void |
char * |
do_change_passphrase(struct passwd *pw) |
get_filename(struct passwd *pw, const char *prompt) |
{ |
{ |
char buf[1024], *comment; |
char buf[1024], default_file[1024]; |
char *old_passphrase, *passphrase1, *passphrase2; |
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struct stat st; |
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RSA *private_key; |
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/* Read key file name. */ |
/* Read key file name. */ |
if (identity_file != NULL) { |
if (identity_file != NULL) { |
strncpy(buf, identity_file, sizeof(buf)); |
return xstrdup(identity_file); |
buf[sizeof(buf) - 1] = '\0'; |
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} else { |
} else { |
printf("Enter file in which the key is ($HOME/%s): ", SSH_CLIENT_IDENTITY); |
snprintf(default_file, sizeof default_file, "%s/%s", |
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pw->pw_dir, SSH_CLIENT_IDENTITY); |
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printf("%s (%s): ", prompt, default_file); |
fflush(stdout); |
fflush(stdout); |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
exit(1); |
exit(1); |
if (strchr(buf, '\n')) |
if (strchr(buf, '\n')) |
*strchr(buf, '\n') = 0; |
*strchr(buf, '\n') = 0; |
if (strcmp(buf, "") == 0) |
if (strcmp(buf, "") == 0) |
snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
return xstrdup(default_file); |
} |
} |
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return xstrdup(buf); |
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} |
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void |
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do_fingerprint(struct passwd *pw) |
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{ |
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char *file, *comment; |
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RSA *public_key; |
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struct stat st; |
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file = get_filename(pw, "Enter file in which the key is"); |
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if (stat(file, &st) < 0) |
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{ |
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perror(file); |
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exit(1); |
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} |
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public_key = RSA_new(); |
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if (!load_public_key(file, public_key, &comment)) { |
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char *cp, line[1024]; |
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BIGNUM *e, *n; |
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int dummy, invalid = 0; |
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FILE *f = fopen(file, "r"); |
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n = BN_new(); |
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e = BN_new(); |
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if (f && fgets(line, sizeof(line), f)) { |
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cp = line; |
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line[strlen(line)-1] = '\0'; |
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if (auth_rsa_read_key(&cp, &dummy, e, n)) { |
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public_key->e = e; |
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public_key->n = n; |
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comment = xstrdup(cp ? cp : "no comment"); |
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} else { |
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invalid = 1; |
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} |
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} else { |
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invalid = 1; |
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} |
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if (invalid) { |
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printf("%s is not a valid key file.\n", file); |
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BN_free(e); |
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BN_free(n); |
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exit(1); |
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} |
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} |
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printf("%d %s %s\n", BN_num_bits(public_key->n), |
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fingerprint(public_key->e, public_key->n), |
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comment); |
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RSA_free(public_key); |
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exit(0); |
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} |
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void |
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do_change_passphrase(struct passwd *pw) |
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{ |
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char *file, *comment; |
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char *old_passphrase, *passphrase1, *passphrase2; |
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struct stat st; |
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RSA *private_key; |
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file = get_filename(pw, "Enter file in which the key is"); |
/* Check if the file exists. */ |
/* Check if the file exists. */ |
if (stat(buf, &st) < 0) |
if (stat(file, &st) < 0) |
{ |
{ |
perror(buf); |
perror(file); |
exit(1); |
exit(1); |
} |
} |
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/* Try to load the public key from the file the verify that it is |
/* Try to load the public key from the file the verify that it is |
readable and of the proper format. */ |
readable and of the proper format. */ |
public_key = RSA_new(); |
public_key = RSA_new(); |
if (!load_public_key(buf, public_key, NULL)) |
if (!load_public_key(file, public_key, NULL)) |
{ |
{ |
printf("%s is not a valid key file.\n", buf); |
printf("%s is not a valid key file.\n", file); |
exit(1); |
exit(1); |
} |
} |
/* Clear the public key since we are just about to load the whole file. */ |
/* Clear the public key since we are just about to load the whole file. */ |
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/* Try to load the file with empty passphrase. */ |
/* Try to load the file with empty passphrase. */ |
private_key = RSA_new(); |
private_key = RSA_new(); |
if (!load_private_key(buf, "", private_key, &comment)) { |
if (!load_private_key(file, "", private_key, &comment)) { |
/* Read passphrase from the user. */ |
/* Read passphrase from the user. */ |
if (identity_passphrase) |
if (identity_passphrase) |
old_passphrase = xstrdup(identity_passphrase); |
old_passphrase = xstrdup(identity_passphrase); |
else |
else |
old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
/* Try to load using the passphrase. */ |
/* Try to load using the passphrase. */ |
if (!load_private_key(buf, old_passphrase, private_key, &comment)) |
if (!load_private_key(file, old_passphrase, private_key, &comment)) |
{ |
{ |
memset(old_passphrase, 0, strlen(old_passphrase)); |
memset(old_passphrase, 0, strlen(old_passphrase)); |
xfree(old_passphrase); |
xfree(old_passphrase); |
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} |
} |
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/* Save the file using the new passphrase. */ |
/* Save the file using the new passphrase. */ |
if (!save_private_key(buf, passphrase1, private_key, comment)) |
if (!save_private_key(file, passphrase1, private_key, comment)) |
{ |
{ |
printf("Saving the key failed: %s: %s.\n", |
printf("Saving the key failed: %s: %s.\n", |
buf, strerror(errno)); |
file, strerror(errno)); |
memset(passphrase1, 0, strlen(passphrase1)); |
memset(passphrase1, 0, strlen(passphrase1)); |
xfree(passphrase1); |
xfree(passphrase1); |
RSA_free(private_key); |
RSA_free(private_key); |
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void |
void |
do_change_comment(struct passwd *pw) |
do_change_comment(struct passwd *pw) |
{ |
{ |
char buf[1024], new_comment[1024], *comment; |
char new_comment[1024], *file, *comment; |
RSA *private_key; |
RSA *private_key; |
char *passphrase; |
char *passphrase; |
struct stat st; |
struct stat st; |
FILE *f; |
FILE *f; |
char *tmpbuf; |
char *tmpbuf; |
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/* Read key file name. */ |
file = get_filename(pw, "Enter file in which the key is"); |
if (identity_file) |
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{ |
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strncpy(buf, identity_file, sizeof(buf)); |
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buf[sizeof(buf) - 1] = '\0'; |
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} |
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else |
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{ |
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printf("Enter file in which the key is ($HOME/%s): ", |
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SSH_CLIENT_IDENTITY); |
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fflush(stdout); |
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if (fgets(buf, sizeof(buf), stdin) == NULL) |
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exit(1); |
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if (strchr(buf, '\n')) |
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*strchr(buf, '\n') = 0; |
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if (strcmp(buf, "") == 0) |
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snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
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} |
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/* Check if the file exists. */ |
/* Check if the file exists. */ |
if (stat(buf, &st) < 0) |
if (stat(file, &st) < 0) |
{ |
{ |
perror(buf); |
perror(file); |
exit(1); |
exit(1); |
} |
} |
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/* Try to load the public key from the file the verify that it is |
/* Try to load the public key from the file the verify that it is |
readable and of the proper format. */ |
readable and of the proper format. */ |
public_key = RSA_new(); |
public_key = RSA_new(); |
if (!load_public_key(buf, public_key, NULL)) |
if (!load_public_key(file, public_key, NULL)) |
{ |
{ |
printf("%s is not a valid key file.\n", buf); |
printf("%s is not a valid key file.\n", file); |
exit(1); |
exit(1); |
} |
} |
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private_key = RSA_new(); |
private_key = RSA_new(); |
/* Try to load the file with empty passphrase. */ |
/* Try to load the file with empty passphrase. */ |
if (load_private_key(buf, "", private_key, &comment)) |
if (load_private_key(file, "", private_key, &comment)) |
passphrase = xstrdup(""); |
passphrase = xstrdup(""); |
else |
else |
{ |
{ |
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else |
else |
passphrase = read_passphrase("Enter passphrase: ", 1); |
passphrase = read_passphrase("Enter passphrase: ", 1); |
/* Try to load using the passphrase. */ |
/* Try to load using the passphrase. */ |
if (!load_private_key(buf, passphrase, private_key, &comment)) |
if (!load_private_key(file, passphrase, private_key, &comment)) |
{ |
{ |
memset(passphrase, 0, strlen(passphrase)); |
memset(passphrase, 0, strlen(passphrase)); |
xfree(passphrase); |
xfree(passphrase); |
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if (identity_comment) |
if (identity_comment) |
{ |
{ |
strncpy(new_comment, identity_comment, sizeof(new_comment)); |
strlcpy(new_comment, identity_comment, sizeof(new_comment)); |
new_comment[sizeof(new_comment) - 1] = '\0'; |
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} |
} |
else |
else |
{ |
{ |
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} |
} |
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/* Save the file using the new passphrase. */ |
/* Save the file using the new passphrase. */ |
if (!save_private_key(buf, passphrase, private_key, new_comment)) |
if (!save_private_key(file, passphrase, private_key, new_comment)) |
{ |
{ |
printf("Saving the key failed: %s: %s.\n", |
printf("Saving the key failed: %s: %s.\n", |
buf, strerror(errno)); |
file, strerror(errno)); |
memset(passphrase, 0, strlen(passphrase)); |
memset(passphrase, 0, strlen(passphrase)); |
xfree(passphrase); |
xfree(passphrase); |
RSA_free(private_key); |
RSA_free(private_key); |
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/* Save the public key in text format in a file with the same name but |
/* Save the public key in text format in a file with the same name but |
.pub appended. */ |
.pub appended. */ |
strcat(buf, ".pub"); |
file = xrealloc(file, strlen(file) + 5); |
f = fopen(buf, "w"); |
strcat(file, ".pub"); |
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f = fopen(file, "w"); |
if (!f) |
if (!f) |
{ |
{ |
printf("Could not save your public key in %s\n", buf); |
printf("Could not save your public key in %s\n", file); |
exit(1); |
exit(1); |
} |
} |
fprintf(f, "%d ", BN_num_bits(public_key->n)); |
fprintf(f, "%d ", BN_num_bits(public_key->n)); |
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{ |
{ |
char buf[16384], buf2[1024], *passphrase1, *passphrase2; |
char buf[16384], buf2[1024], *passphrase1, *passphrase2; |
struct passwd *pw; |
struct passwd *pw; |
char *tmpbuf; |
char *file, *tmpbuf; |
int opt; |
int opt; |
struct stat st; |
struct stat st; |
FILE *f; |
FILE *f; |
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error("Could not create directory '%s'.", buf); |
error("Could not create directory '%s'.", buf); |
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/* Parse command line arguments. */ |
/* Parse command line arguments. */ |
while ((opt = getopt(ac, av, "qpcb:f:P:N:C:")) != EOF) |
while ((opt = getopt(ac, av, "qpclb:f:P:N:C:")) != EOF) |
{ |
{ |
switch (opt) |
switch (opt) |
{ |
{ |
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} |
} |
break; |
break; |
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case 'l': |
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print_fingerprint = 1; |
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break; |
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case 'p': |
case 'p': |
change_passphrase = 1; |
change_passphrase = 1; |
break; |
break; |
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exit(1); |
exit(1); |
} |
} |
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if (print_fingerprint) |
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do_fingerprint(pw); |
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/* If the user requested to change the passphrase, do it now. This |
/* If the user requested to change the passphrase, do it now. This |
function never returns. */ |
function never returns. */ |
if (change_passphrase) |
if (change_passphrase) |
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if (change_comment) |
if (change_comment) |
do_change_comment(pw); |
do_change_comment(pw); |
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/* Initialize random number generator. This may take a while if the |
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user has no seed file, so display a message to the user. */ |
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if (!quiet) |
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printf("Initializing random number generator...\n"); |
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arc4random_stir(); |
arc4random_stir(); |
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if (quiet) |
if (quiet) |
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ask_file_again: |
ask_file_again: |
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/* Ask for a file to save the key in. */ |
file = get_filename(pw, "Enter file in which to save the key"); |
if (identity_file) |
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{ |
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strncpy(buf, identity_file, sizeof(buf)); |
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buf[sizeof(buf) - 1] = '\0'; |
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} |
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else |
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{ |
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printf("Enter file in which to save the key ($HOME/%s): ", |
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SSH_CLIENT_IDENTITY); |
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fflush(stdout); |
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if (fgets(buf, sizeof(buf), stdin) == NULL) |
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exit(1); |
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if (strchr(buf, '\n')) |
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*strchr(buf, '\n') = 0; |
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if (strcmp(buf, "") == 0) |
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snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
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} |
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/* If the file aready exists, ask the user to confirm. */ |
/* If the file aready exists, ask the user to confirm. */ |
if (stat(buf, &st) >= 0) |
if (stat(file, &st) >= 0) |
{ |
{ |
printf("%s already exists.\n", buf); |
printf("%s already exists.\n", file); |
printf("Overwrite (y/n)? "); |
printf("Overwrite (y/n)? "); |
fflush(stdout); |
fflush(stdout); |
if (fgets(buf2, sizeof(buf2), stdin) == NULL) |
if (fgets(buf2, sizeof(buf2), stdin) == NULL) |
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} |
} |
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/* Save the key with the given passphrase and comment. */ |
/* Save the key with the given passphrase and comment. */ |
if (!save_private_key(buf, passphrase1, private_key, buf2)) |
if (!save_private_key(file, passphrase1, private_key, buf2)) |
{ |
{ |
printf("Saving the key failed: %s: %s.\n", |
printf("Saving the key failed: %s: %s.\n", |
buf, strerror(errno)); |
file, strerror(errno)); |
memset(passphrase1, 0, strlen(passphrase1)); |
memset(passphrase1, 0, strlen(passphrase1)); |
xfree(passphrase1); |
xfree(passphrase1); |
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xfree(file); |
goto ask_file_again; |
goto ask_file_again; |
} |
} |
/* Clear the passphrase. */ |
/* Clear the passphrase. */ |
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arc4random_stir(); |
arc4random_stir(); |
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if (!quiet) |
if (!quiet) |
printf("Your identification has been saved in %s.\n", buf); |
printf("Your identification has been saved in %s.\n", file); |
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/* Display the public key on the screen. */ |
/* Display the public key on the screen. */ |
if (!quiet) { |
if (!quiet) { |
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/* Save the public key in text format in a file with the same name but |
/* Save the public key in text format in a file with the same name but |
.pub appended. */ |
.pub appended. */ |
strcat(buf, ".pub"); |
strcat(file, ".pub"); |
f = fopen(buf, "w"); |
f = fopen(file, "w"); |
if (!f) |
if (!f) |
{ |
{ |
printf("Could not save your public key in %s\n", buf); |
printf("Could not save your public key in %s\n", file); |
exit(1); |
exit(1); |
} |
} |
fprintf(f, "%d ", BN_num_bits(public_key->n)); |
fprintf(f, "%d ", BN_num_bits(public_key->n)); |
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fclose(f); |
fclose(f); |
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if (!quiet) |
if (!quiet) |
printf("Your public key has been saved in %s\n", buf); |
printf("Your public key has been saved in %s\n", file); |
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exit(0); |
exit(0); |
} |
} |