version 1.28, 2000/07/07 03:55:04 |
version 1.32, 2000/10/09 21:30:44 |
|
|
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* All rights reserved |
* All rights reserved |
* Created: Mon Mar 27 02:26:40 1995 ylo |
|
* Identity and host key generation and maintenance. |
* 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" |
#include "includes.h" |
|
|
|
|
#include "ssh.h" |
#include "ssh.h" |
#include "xmalloc.h" |
#include "xmalloc.h" |
#include "fingerprint.h" |
|
#include "key.h" |
#include "key.h" |
#include "rsa.h" |
#include "rsa.h" |
#include "dsa.h" |
#include "dsa.h" |
#include "authfile.h" |
#include "authfile.h" |
#include "uuencode.h" |
#include "uuencode.h" |
|
|
|
#include "buffer.h" |
|
#include "bufaux.h" |
|
|
/* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
/* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
int bits = 1024; |
int bits = 1024; |
|
|
|
|
return success; |
return success; |
} |
} |
|
|
#define SSH_COM_MAGIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
#define SSH_COM_MAGIC_END "---- END 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 |
void |
do_convert_to_ssh2(struct passwd *pw) |
do_convert_to_ssh2(struct passwd *pw) |
|
|
exit(1); |
exit(1); |
} |
} |
dsa_make_key_blob(k, &blob, &len); |
dsa_make_key_blob(k, &blob, &len); |
fprintf(stdout, "%s\n", SSH_COM_MAGIC_BEGIN); |
fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
fprintf(stdout, |
fprintf(stdout, |
"Comment: \"%d-bit DSA, converted from openssh by %s@%s\"\n", |
"Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
BN_num_bits(k->dsa->p), |
key_size(k), key_type(k), |
pw->pw_name, hostname); |
pw->pw_name, hostname); |
dump_base64(stdout, blob, len); |
dump_base64(stdout, blob, len); |
fprintf(stdout, "%s\n", SSH_COM_MAGIC_END); |
fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
key_free(k); |
key_free(k); |
xfree(blob); |
xfree(blob); |
exit(0); |
exit(0); |
} |
} |
|
|
void |
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((unsigned 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) |
do_convert_from_ssh2(struct passwd *pw) |
{ |
{ |
Key *k; |
Key *k; |
|
|
char blob[8096]; |
char blob[8096]; |
char encoded[8096]; |
char encoded[8096]; |
struct stat st; |
struct stat st; |
int escaped = 0; |
int escaped = 0, private = 0, ok; |
FILE *fp; |
FILE *fp; |
|
|
if (!have_identity) |
if (!have_identity) |
|
|
escaped++; |
escaped++; |
if (strncmp(line, "----", 4) == 0 || |
if (strncmp(line, "----", 4) == 0 || |
strstr(line, ": ") != NULL) { |
strstr(line, ": ") != NULL) { |
|
if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
|
private = 1; |
fprintf(stderr, "ignore: %s", line); |
fprintf(stderr, "ignore: %s", line); |
continue; |
continue; |
} |
} |
|
|
fprintf(stderr, "uudecode failed.\n"); |
fprintf(stderr, "uudecode failed.\n"); |
exit(1); |
exit(1); |
} |
} |
k = dsa_key_from_blob(blob, blen); |
k = private ? |
if (!key_write(k, stdout)) |
do_convert_private_ssh2_from_blob(blob, blen) : |
fprintf(stderr, "key_write failed"); |
dsa_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); |
key_free(k); |
fprintf(stdout, "\n"); |
fprintf(stdout, "\n"); |
fclose(fp); |
fclose(fp); |
|
|
void |
void |
do_fingerprint(struct passwd *pw) |
do_fingerprint(struct passwd *pw) |
{ |
{ |
|
/* XXX RSA1 only */ |
|
|
FILE *f; |
FILE *f; |
BIGNUM *e, *n; |
|
Key *public; |
Key *public; |
char *comment = NULL, *cp, *ep, line[16*1024]; |
char *comment = NULL, *cp, *ep, line[16*1024]; |
int i, skip = 0, num = 1, invalid = 1; |
int i, skip = 0, num = 1, invalid = 1; |
|
|
key_free(public); |
key_free(public); |
exit(0); |
exit(0); |
} |
} |
key_free(public); |
|
|
|
/* XXX */ |
|
f = fopen(identity_file, "r"); |
f = fopen(identity_file, "r"); |
if (f != NULL) { |
if (f != NULL) { |
n = BN_new(); |
|
e = BN_new(); |
|
while (fgets(line, sizeof(line), f)) { |
while (fgets(line, sizeof(line), f)) { |
i = strlen(line) - 1; |
i = strlen(line) - 1; |
if (line[i] != '\n') { |
if (line[i] != '\n') { |
|
|
*cp++ = '\0'; |
*cp++ = '\0'; |
} |
} |
ep = cp; |
ep = cp; |
if (auth_rsa_read_key(&cp, &ignore, e, n)) { |
if (auth_rsa_read_key(&cp, &ignore, public->rsa->e, public->rsa->n)) { |
invalid = 0; |
invalid = 0; |
comment = *cp ? cp : comment; |
comment = *cp ? cp : comment; |
printf("%d %s %s\n", BN_num_bits(n), |
printf("%d %s %s\n", key_size(public), |
fingerprint(e, n), |
key_fingerprint(public), |
comment ? comment : "no comment"); |
comment ? comment : "no comment"); |
} |
} |
} |
} |
BN_free(e); |
|
BN_free(n); |
|
fclose(f); |
fclose(f); |
} |
} |
|
key_free(public); |
if (invalid) { |
if (invalid) { |
printf("%s is not a valid key file.\n", identity_file); |
printf("%s is not a valid key file.\n", identity_file); |
exit(1); |
exit(1); |
|
|
snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, SSH_USER_DIR); |
snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, SSH_USER_DIR); |
if (strstr(identity_file, dotsshdir) != NULL && |
if (strstr(identity_file, dotsshdir) != NULL && |
stat(dotsshdir, &st) < 0) { |
stat(dotsshdir, &st) < 0) { |
if (mkdir(dotsshdir, 0755) < 0) |
if (mkdir(dotsshdir, 0700) < 0) |
error("Could not create directory '%s'.", dotsshdir); |
error("Could not create directory '%s'.", dotsshdir); |
else if (!quiet) |
else if (!quiet) |
printf("Created directory '%s'.\n", dotsshdir); |
printf("Created directory '%s'.\n", dotsshdir); |