| /* |
| * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| * All rights reserved |
| * Identity and host key generation and maintenance. |
| * |
| * As far as I am concerned, the code I have written for this software |
| * can be used freely for any purpose. Any derived versions of this |
| * software must be clearly marked as such, and if the derived work is |
| * incompatible with the protocol description in the RFC file, it must be |
| * called by a name other than "ssh" or "Secure Shell". |
| */ |
| |
| #include "includes.h" |
| RCSID("$OpenBSD: ssh-keygen.c,v 1.49 2001/03/11 22:33:24 markus Exp $"); |
| |
| #include <openssl/evp.h> |
| #include <openssl/pem.h> |
| |
| #include "xmalloc.h" |
| #include "key.h" |
| #include "authfile.h" |
| #include "uuencode.h" |
| #include "buffer.h" |
| #include "bufaux.h" |
| #include "pathnames.h" |
| #include "log.h" |
| #include "readpass.h" |
| |
| /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
| int bits = 1024; |
| |
| /* |
| * Flag indicating that we just want to change the passphrase. This can be |
| * set on the command line. |
| */ |
| int change_passphrase = 0; |
| |
| /* |
| * Flag indicating that we just want to change the comment. This can be set |
| * on the command line. |
| */ |
| int change_comment = 0; |
| |
| int quiet = 0; |
| |
| /* Flag indicating that we just want to see the key fingerprint */ |
| int print_fingerprint = 0; |
| int print_bubblebabble = 0; |
| |
| /* The identity file name, given on the command line or entered by the user. */ |
| char identity_file[1024]; |
| int have_identity = 0; |
| |
| /* This is set to the passphrase if given on the command line. */ |
| char *identity_passphrase = NULL; |
| |
| /* This is set to the new passphrase if given on the command line. */ |
| char *identity_new_passphrase = NULL; |
| |
| /* This is set to the new comment if given on the command line. */ |
| char *identity_comment = NULL; |
| |
| /* Dump public key file in format used by real and the original SSH 2 */ |
| int convert_to_ssh2 = 0; |
| int convert_from_ssh2 = 0; |
| int print_public = 0; |
| |
| /* default to RSA for SSH-1 */ |
| char *key_type_name = "rsa1"; |
| |
| /* argv0 */ |
| #ifdef HAVE___PROGNAME |
| extern char *__progname; |
| #else |
| char *__progname; |
| #endif |
| |
| char hostname[MAXHOSTNAMELEN]; |
| |
| void |
| ask_filename(struct passwd *pw, const char *prompt) |
| { |
| char buf[1024]; |
| char *name = NULL; |
| |
| switch (key_type_from_name(key_type_name)) { |
| case KEY_RSA1: |
| name = _PATH_SSH_CLIENT_IDENTITY; |
| break; |
| case KEY_DSA: |
| name = _PATH_SSH_CLIENT_ID_DSA; |
| break; |
| case KEY_RSA: |
| name = _PATH_SSH_CLIENT_ID_RSA; |
| break; |
| default: |
| fprintf(stderr, "bad key type"); |
| exit(1); |
| break; |
| } |
| snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
| fprintf(stderr, "%s (%s): ", prompt, identity_file); |
| fflush(stderr); |
| if (fgets(buf, sizeof(buf), stdin) == NULL) |
| exit(1); |
| if (strchr(buf, '\n')) |
| *strchr(buf, '\n') = 0; |
| if (strcmp(buf, "") != 0) |
| strlcpy(identity_file, buf, sizeof(identity_file)); |
| have_identity = 1; |
| } |
| |
| int |
| try_load_key(char *filename, Key *k) |
| { |
| int success = 1; |
| if (!load_private_key(filename, "", k, NULL)) { |
| char *pass = read_passphrase("Enter passphrase: ", 1); |
| if (!load_private_key(filename, pass, k, NULL)) { |
| success = 0; |
| } |
| memset(pass, 0, strlen(pass)); |
| xfree(pass); |
| } |
| return success; |
| } |
| |
| #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
| #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
| #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
| #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
| |
| void |
| do_convert_to_ssh2(struct passwd *pw) |
| { |
| Key *k; |
| int len; |
| u_char *blob; |
| struct stat st; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) < 0) { |
| perror(identity_file); |
| exit(1); |
| } |
| k = key_new(KEY_UNSPEC); |
| if (!try_load_key(identity_file, k)) { |
| fprintf(stderr, "load failed\n"); |
| exit(1); |
| } |
| key_to_blob(k, &blob, &len); |
| fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
| fprintf(stdout, |
| "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
| key_size(k), key_type(k), |
| pw->pw_name, hostname); |
| dump_base64(stdout, blob, len); |
| fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
| key_free(k); |
| xfree(blob); |
| exit(0); |
| } |
| |
| void |
| buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
| { |
| int bits = buffer_get_int(b); |
| int bytes = (bits + 7) / 8; |
| if (buffer_len(b) < bytes) |
| fatal("buffer_get_bignum_bits: input buffer too small"); |
| BN_bin2bn((u_char *)buffer_ptr(b), bytes, value); |
| buffer_consume(b, bytes); |
| } |
| |
| Key * |
| do_convert_private_ssh2_from_blob(char *blob, int blen) |
| { |
| Buffer b; |
| DSA *dsa; |
| Key *key = NULL; |
| int ignore, magic, rlen; |
| char *type, *cipher; |
| |
| buffer_init(&b); |
| buffer_append(&b, blob, blen); |
| |
| magic = buffer_get_int(&b); |
| if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { |
| error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); |
| buffer_free(&b); |
| return NULL; |
| } |
| ignore = buffer_get_int(&b); |
| type = buffer_get_string(&b, NULL); |
| cipher = buffer_get_string(&b, NULL); |
| ignore = buffer_get_int(&b); |
| ignore = buffer_get_int(&b); |
| ignore = buffer_get_int(&b); |
| xfree(type); |
| |
| if (strcmp(cipher, "none") != 0) { |
| error("unsupported cipher %s", cipher); |
| xfree(cipher); |
| buffer_free(&b); |
| return NULL; |
| } |
| xfree(cipher); |
| |
| key = key_new(KEY_DSA); |
| dsa = key->dsa; |
| dsa->priv_key = BN_new(); |
| if (dsa->priv_key == NULL) { |
| error("alloc priv_key failed"); |
| key_free(key); |
| return NULL; |
| } |
| buffer_get_bignum_bits(&b, dsa->p); |
| buffer_get_bignum_bits(&b, dsa->g); |
| buffer_get_bignum_bits(&b, dsa->q); |
| buffer_get_bignum_bits(&b, dsa->pub_key); |
| buffer_get_bignum_bits(&b, dsa->priv_key); |
| rlen = buffer_len(&b); |
| if(rlen != 0) |
| error("do_convert_private_ssh2_from_blob: remaining bytes in key blob %d", rlen); |
| buffer_free(&b); |
| return key; |
| } |
| |
| void |
| do_convert_from_ssh2(struct passwd *pw) |
| { |
| Key *k; |
| int blen; |
| char line[1024], *p; |
| char blob[8096]; |
| char encoded[8096]; |
| struct stat st; |
| int escaped = 0, private = 0, ok; |
| FILE *fp; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) < 0) { |
| perror(identity_file); |
| exit(1); |
| } |
| fp = fopen(identity_file, "r"); |
| if (fp == NULL) { |
| perror(identity_file); |
| exit(1); |
| } |
| encoded[0] = '\0'; |
| while (fgets(line, sizeof(line), fp)) { |
| if (!(p = strchr(line, '\n'))) { |
| fprintf(stderr, "input line too long.\n"); |
| exit(1); |
| } |
| if (p > line && p[-1] == '\\') |
| escaped++; |
| if (strncmp(line, "----", 4) == 0 || |
| strstr(line, ": ") != NULL) { |
| if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
| private = 1; |
| fprintf(stderr, "ignore: %s", line); |
| continue; |
| } |
| if (escaped) { |
| escaped--; |
| fprintf(stderr, "escaped: %s", line); |
| continue; |
| } |
| *p = '\0'; |
| strlcat(encoded, line, sizeof(encoded)); |
| } |
| blen = uudecode(encoded, (u_char *)blob, sizeof(blob)); |
| if (blen < 0) { |
| fprintf(stderr, "uudecode failed.\n"); |
| exit(1); |
| } |
| k = private ? |
| do_convert_private_ssh2_from_blob(blob, blen) : |
| key_from_blob(blob, blen); |
| if (k == NULL) { |
| fprintf(stderr, "decode blob failed.\n"); |
| exit(1); |
| } |
| ok = private ? |
| PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : |
| key_write(k, stdout); |
| if (!ok) { |
| fprintf(stderr, "key write failed"); |
| exit(1); |
| } |
| key_free(k); |
| fprintf(stdout, "\n"); |
| fclose(fp); |
| exit(0); |
| } |
| |
| void |
| do_print_public(struct passwd *pw) |
| { |
| Key *k; |
| struct stat st; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) < 0) { |
| perror(identity_file); |
| exit(1); |
| } |
| k = key_new(KEY_UNSPEC); |
| if (!try_load_key(identity_file, k)) { |
| fprintf(stderr, "load failed\n"); |
| exit(1); |
| } |
| if (!key_write(k, stdout)) |
| fprintf(stderr, "key_write failed"); |
| key_free(k); |
| fprintf(stdout, "\n"); |
| exit(0); |
| } |
| |
| void |
| do_fingerprint(struct passwd *pw) |
| { |
| FILE *f; |
| Key *public; |
| char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
| int i, skip = 0, num = 1, invalid = 1, success = 0, rep, type; |
| struct stat st; |
| |
| type = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
| rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) < 0) { |
| perror(identity_file); |
| exit(1); |
| } |
| public = key_new(KEY_RSA1); |
| if (load_public_key(identity_file, public, &comment)) { |
| success = 1; |
| } else { |
| key_free(public); |
| public = key_new(KEY_UNSPEC); |
| if (try_load_public_key(identity_file, public, &comment)) |
| success = 1; |
| else |
| debug("try_load_public_key KEY_UNSPEC failed"); |
| } |
| if (success) { |
| fp = key_fingerprint_ex(public, type, rep); |
| printf("%d %s %s\n", key_size(public), |
| fp, comment); |
| key_free(public); |
| xfree(comment); |
| xfree(fp); |
| exit(0); |
| } |
| |
| f = fopen(identity_file, "r"); |
| if (f != NULL) { |
| while (fgets(line, sizeof(line), f)) { |
| i = strlen(line) - 1; |
| if (line[i] != '\n') { |
| error("line %d too long: %.40s...", num, line); |
| skip = 1; |
| continue; |
| } |
| num++; |
| if (skip) { |
| skip = 0; |
| continue; |
| } |
| line[i] = '\0'; |
| |
| /* Skip leading whitespace, empty and comment lines. */ |
| for (cp = line; *cp == ' ' || *cp == '\t'; cp++) |
| ; |
| if (!*cp || *cp == '\n' || *cp == '#') |
| continue ; |
| i = strtol(cp, &ep, 10); |
| if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { |
| int quoted = 0; |
| comment = cp; |
| for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { |
| if (*cp == '\\' && cp[1] == '"') |
| cp++; /* Skip both */ |
| else if (*cp == '"') |
| quoted = !quoted; |
| } |
| if (!*cp) |
| continue; |
| *cp++ = '\0'; |
| } |
| ep = cp; |
| public = key_new(KEY_RSA1); |
| if (key_read(public, &cp) != 1) { |
| cp = ep; |
| key_free(public); |
| public = key_new(KEY_UNSPEC); |
| if (key_read(public, &cp) != 1) { |
| key_free(public); |
| continue; |
| } |
| } |
| comment = *cp ? cp : comment; |
| fp = key_fingerprint_ex(public, type, rep); |
| printf("%d %s %s\n", key_size(public), fp, |
| comment ? comment : "no comment"); |
| xfree(fp); |
| invalid = 0; |
| } |
| fclose(f); |
| } |
| key_free(public); |
| if (invalid) { |
| printf("%s is not a valid key file.\n", identity_file); |
| exit(1); |
| } |
| exit(0); |
| } |
| |
| /* |
| * Perform changing a passphrase. The argument is the passwd structure |
| * for the current user. |
| */ |
| void |
| do_change_passphrase(struct passwd *pw) |
| { |
| char *comment; |
| char *old_passphrase, *passphrase1, *passphrase2; |
| struct stat st; |
| Key *private; |
| Key *public; |
| int type = KEY_RSA1; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) < 0) { |
| perror(identity_file); |
| exit(1); |
| } |
| public = key_new(type); |
| if (!load_public_key(identity_file, public, NULL)) { |
| type = KEY_UNSPEC; |
| } else { |
| /* Clear the public key since we are just about to load the whole file. */ |
| key_free(public); |
| } |
| /* Try to load the file with empty passphrase. */ |
| private = key_new(type); |
| if (!load_private_key(identity_file, "", private, &comment)) { |
| if (identity_passphrase) |
| old_passphrase = xstrdup(identity_passphrase); |
| else |
| old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
| if (!load_private_key(identity_file, old_passphrase, private, &comment)) { |
| memset(old_passphrase, 0, strlen(old_passphrase)); |
| xfree(old_passphrase); |
| printf("Bad passphrase.\n"); |
| exit(1); |
| } |
| memset(old_passphrase, 0, strlen(old_passphrase)); |
| xfree(old_passphrase); |
| } |
| printf("Key has comment '%s'\n", comment); |
| |
| /* Ask the new passphrase (twice). */ |
| if (identity_new_passphrase) { |
| passphrase1 = xstrdup(identity_new_passphrase); |
| passphrase2 = NULL; |
| } else { |
| passphrase1 = |
| read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); |
| passphrase2 = read_passphrase("Enter same passphrase again: ", 1); |
| |
| /* Verify that they are the same. */ |
| if (strcmp(passphrase1, passphrase2) != 0) { |
| memset(passphrase1, 0, strlen(passphrase1)); |
| memset(passphrase2, 0, strlen(passphrase2)); |
| xfree(passphrase1); |
| xfree(passphrase2); |
| printf("Pass phrases do not match. Try again.\n"); |
| exit(1); |
| } |
| /* Destroy the other copy. */ |
| memset(passphrase2, 0, strlen(passphrase2)); |
| xfree(passphrase2); |
| } |
| |
| /* Save the file using the new passphrase. */ |
| if (!save_private_key(identity_file, passphrase1, private, comment)) { |
| printf("Saving the key failed: %s: %s.\n", |
| identity_file, strerror(errno)); |
| memset(passphrase1, 0, strlen(passphrase1)); |
| xfree(passphrase1); |
| key_free(private); |
| xfree(comment); |
| exit(1); |
| } |
| /* Destroy the passphrase and the copy of the key in memory. */ |
| memset(passphrase1, 0, strlen(passphrase1)); |
| xfree(passphrase1); |
| key_free(private); /* Destroys contents */ |
| xfree(comment); |
| |
| printf("Your identification has been saved with the new passphrase.\n"); |
| exit(0); |
| } |
| |
| /* |
| * Change the comment of a private key file. |
| */ |
| void |
| do_change_comment(struct passwd *pw) |
| { |
| char new_comment[1024], *comment, *passphrase; |
| Key *private, *public; |
| struct stat st; |
| FILE *f; |
| int fd; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) < 0) { |
| perror(identity_file); |
| exit(1); |
| } |
| /* |
| * Try to load the public key from the file the verify that it is |
| * readable and of the proper format. |
| */ |
| public = key_new(KEY_RSA1); |
| if (!load_public_key(identity_file, public, NULL)) { |
| printf("%s is not a valid key file.\n", identity_file); |
| printf("Comments are only supported in RSA1 keys\n"); |
| exit(1); |
| } |
| |
| private = key_new(KEY_RSA1); |
| if (load_private_key(identity_file, "", private, &comment)) |
| passphrase = xstrdup(""); |
| else { |
| if (identity_passphrase) |
| passphrase = xstrdup(identity_passphrase); |
| else if (identity_new_passphrase) |
| passphrase = xstrdup(identity_new_passphrase); |
| else |
| passphrase = read_passphrase("Enter passphrase: ", 1); |
| /* Try to load using the passphrase. */ |
| if (!load_private_key(identity_file, passphrase, private, &comment)) { |
| memset(passphrase, 0, strlen(passphrase)); |
| xfree(passphrase); |
| printf("Bad passphrase.\n"); |
| exit(1); |
| } |
| } |
| printf("Key now has comment '%s'\n", comment); |
| |
| if (identity_comment) { |
| strlcpy(new_comment, identity_comment, sizeof(new_comment)); |
| } else { |
| printf("Enter new comment: "); |
| fflush(stdout); |
| if (!fgets(new_comment, sizeof(new_comment), stdin)) { |
| memset(passphrase, 0, strlen(passphrase)); |
| key_free(private); |
| exit(1); |
| } |
| if (strchr(new_comment, '\n')) |
| *strchr(new_comment, '\n') = 0; |
| } |
| |
| /* Save the file using the new passphrase. */ |
| if (!save_private_key(identity_file, passphrase, private, new_comment)) { |
| printf("Saving the key failed: %s: %s.\n", |
| identity_file, strerror(errno)); |
| memset(passphrase, 0, strlen(passphrase)); |
| xfree(passphrase); |
| key_free(private); |
| xfree(comment); |
| exit(1); |
| } |
| memset(passphrase, 0, strlen(passphrase)); |
| xfree(passphrase); |
| key_free(private); |
| |
| strlcat(identity_file, ".pub", sizeof(identity_file)); |
| fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| if (fd == -1) { |
| printf("Could not save your public key in %s\n", identity_file); |
| exit(1); |
| } |
| f = fdopen(fd, "w"); |
| if (f == NULL) { |
| printf("fdopen %s failed", identity_file); |
| exit(1); |
| } |
| if (!key_write(public, f)) |
| fprintf(stderr, "write key failed"); |
| key_free(public); |
| fprintf(f, " %s\n", new_comment); |
| fclose(f); |
| |
| xfree(comment); |
| |
| printf("The comment in your key file has been changed.\n"); |
| exit(0); |
| } |
| |
| void |
| usage(void) |
| { |
| printf("Usage: %s [-lpqxXyc] [-t type] [-b bits] [-f file] [-C comment] " |
| "[-N new-pass] [-P pass]\n", __progname); |
| exit(1); |
| } |
| |
| /* |
| * Main program for key management. |
| */ |
| int |
| main(int ac, char **av) |
| { |
| char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
| Key *private, *public; |
| struct passwd *pw; |
| int opt, type, fd; |
| struct stat st; |
| FILE *f; |
| |
| extern int optind; |
| extern char *optarg; |
| |
| __progname = get_progname(av[0]); |
| init_rng(); |
| |
| SSLeay_add_all_algorithms(); |
| |
| /* we need this for the home * directory. */ |
| pw = getpwuid(getuid()); |
| if (!pw) { |
| printf("You don't exist, go away!\n"); |
| exit(1); |
| } |
| if (gethostname(hostname, sizeof(hostname)) < 0) { |
| perror("gethostname"); |
| exit(1); |
| } |
| |
| while ((opt = getopt(ac, av, "dqpclBRxXyb:f:t:P:N:C:")) != -1) { |
| switch (opt) { |
| case 'b': |
| bits = atoi(optarg); |
| if (bits < 512 || bits > 32768) { |
| printf("Bits has bad value.\n"); |
| exit(1); |
| } |
| break; |
| |
| case 'l': |
| print_fingerprint = 1; |
| break; |
| |
| case 'B': |
| print_bubblebabble = 1; |
| break; |
| |
| case 'p': |
| change_passphrase = 1; |
| break; |
| |
| case 'c': |
| change_comment = 1; |
| break; |
| |
| case 'f': |
| strlcpy(identity_file, optarg, sizeof(identity_file)); |
| have_identity = 1; |
| break; |
| |
| case 'P': |
| identity_passphrase = optarg; |
| break; |
| |
| case 'N': |
| identity_new_passphrase = optarg; |
| break; |
| |
| case 'C': |
| identity_comment = optarg; |
| break; |
| |
| case 'q': |
| quiet = 1; |
| break; |
| |
| case 'R': |
| /* unused */ |
| exit(0); |
| break; |
| |
| case 'x': |
| convert_to_ssh2 = 1; |
| break; |
| |
| case 'X': |
| convert_from_ssh2 = 1; |
| break; |
| |
| case 'y': |
| print_public = 1; |
| break; |
| |
| case 'd': |
| key_type_name = "dsa"; |
| break; |
| |
| case 't': |
| key_type_name = optarg; |
| break; |
| |
| case '?': |
| default: |
| usage(); |
| } |
| } |
| if (optind < ac) { |
| printf("Too many arguments.\n"); |
| usage(); |
| } |
| if (change_passphrase && change_comment) { |
| printf("Can only have one of -p and -c.\n"); |
| usage(); |
| } |
| if (print_fingerprint || print_bubblebabble) |
| do_fingerprint(pw); |
| if (change_passphrase) |
| do_change_passphrase(pw); |
| if (change_comment) |
| do_change_comment(pw); |
| if (convert_to_ssh2) |
| do_convert_to_ssh2(pw); |
| if (convert_from_ssh2) |
| do_convert_from_ssh2(pw); |
| if (print_public) |
| do_print_public(pw); |
| |
| arc4random_stir(); |
| |
| type = key_type_from_name(key_type_name); |
| if (type == KEY_UNSPEC) { |
| fprintf(stderr, "unknown key type %s\n", key_type_name); |
| exit(1); |
| } |
| if (!quiet) |
| printf("Generating public/private %s key pair.\n", key_type_name); |
| private = key_generate(type, bits); |
| if (private == NULL) { |
| fprintf(stderr, "key_generate failed"); |
| exit(1); |
| } |
| public = key_from_private(private); |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which to save the key"); |
| |
| /* Create ~/.ssh directory if it doesn\'t already exist. */ |
| snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
| if (strstr(identity_file, dotsshdir) != NULL && |
| stat(dotsshdir, &st) < 0) { |
| if (mkdir(dotsshdir, 0700) < 0) |
| error("Could not create directory '%s'.", dotsshdir); |
| else if (!quiet) |
| printf("Created directory '%s'.\n", dotsshdir); |
| } |
| /* If the file already exists, ask the user to confirm. */ |
| if (stat(identity_file, &st) >= 0) { |
| char yesno[3]; |
| printf("%s already exists.\n", identity_file); |
| printf("Overwrite (y/n)? "); |
| fflush(stdout); |
| if (fgets(yesno, sizeof(yesno), stdin) == NULL) |
| exit(1); |
| if (yesno[0] != 'y' && yesno[0] != 'Y') |
| exit(1); |
| } |
| /* Ask for a passphrase (twice). */ |
| if (identity_passphrase) |
| passphrase1 = xstrdup(identity_passphrase); |
| else if (identity_new_passphrase) |
| passphrase1 = xstrdup(identity_new_passphrase); |
| else { |
| passphrase_again: |
| passphrase1 = |
| read_passphrase("Enter passphrase (empty for no passphrase): ", 1); |
| passphrase2 = read_passphrase("Enter same passphrase again: ", 1); |
| if (strcmp(passphrase1, passphrase2) != 0) { |
| /* The passphrases do not match. Clear them and retry. */ |
| memset(passphrase1, 0, strlen(passphrase1)); |
| memset(passphrase2, 0, strlen(passphrase2)); |
| xfree(passphrase1); |
| xfree(passphrase2); |
| printf("Passphrases do not match. Try again.\n"); |
| goto passphrase_again; |
| } |
| /* Clear the other copy of the passphrase. */ |
| memset(passphrase2, 0, strlen(passphrase2)); |
| xfree(passphrase2); |
| } |
| |
| if (identity_comment) { |
| strlcpy(comment, identity_comment, sizeof(comment)); |
| } else { |
| /* Create default commend field for the passphrase. */ |
| snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
| } |
| |
| /* Save the key with the given passphrase and comment. */ |
| if (!save_private_key(identity_file, passphrase1, private, comment)) { |
| printf("Saving the key failed: %s: %s.\n", |
| identity_file, strerror(errno)); |
| memset(passphrase1, 0, strlen(passphrase1)); |
| xfree(passphrase1); |
| exit(1); |
| } |
| /* Clear the passphrase. */ |
| memset(passphrase1, 0, strlen(passphrase1)); |
| xfree(passphrase1); |
| |
| /* Clear the private key and the random number generator. */ |
| key_free(private); |
| arc4random_stir(); |
| |
| if (!quiet) |
| printf("Your identification has been saved in %s.\n", identity_file); |
| |
| strlcat(identity_file, ".pub", sizeof(identity_file)); |
| fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| if (fd == -1) { |
| printf("Could not save your public key in %s\n", identity_file); |
| exit(1); |
| } |
| f = fdopen(fd, "w"); |
| if (f == NULL) { |
| printf("fdopen %s failed", identity_file); |
| exit(1); |
| } |
| if (!key_write(public, f)) |
| fprintf(stderr, "write key failed"); |
| fprintf(f, " %s\n", comment); |
| fclose(f); |
| |
| if (!quiet) { |
| printf("Your public key has been saved in %s.\n", |
| identity_file); |
| printf("The key fingerprint is:\n"); |
| printf("%s %s\n", key_fingerprint(public), comment); |
| } |
| |
| key_free(public); |
| exit(0); |
| } |