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aefa65dfca
openssh/openssh-5.8p1-fingerprint.patch
Jan F aefa65dfca another audit improovements
2011-02-24 14:25:14 +01:00

420 lines
16 KiB
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diff -up openssh-5.8p1/auth2-hostbased.c.fingerprint openssh-5.8p1/auth2-hostbased.c
--- openssh-5.8p1/auth2-hostbased.c.fingerprint 2010-08-05 05:04:50.000000000 +0200
+++ openssh-5.8p1/auth2-hostbased.c 2011-02-24 10:30:47.000000000 +0100
@@ -196,16 +196,18 @@ hostbased_key_allowed(struct passwd *pw,
if (host_status == HOST_OK) {
if (key_is_cert(key)) {
- fp = key_fingerprint(key->cert->signature_key,
- SSH_FP_MD5, SSH_FP_HEX);
+ fp = key_selected_fingerprint(key->cert->signature_key,
+ SSH_FP_HEX);
verbose("Accepted certificate ID \"%s\" signed by "
- "%s CA %s from %s@%s", key->cert->key_id,
- key_type(key->cert->signature_key), fp,
+ "%s CA %s%s from %s@%s", key->cert->key_id,
+ key_type(key->cert->signature_key),
+ key_fingerprint_prefix(), fp,
cuser, lookup);
} else {
- fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
- verbose("Accepted %s public key %s from %s@%s",
- key_type(key), fp, cuser, lookup);
+ fp = key_selected_fingerprint(key, SSH_FP_HEX);
+ verbose("Accepted %s public key %s%s from %s@%s",
+ key_type(key), key_fingerprint_prefix(),
+ fp, cuser, lookup);
}
xfree(fp);
}
diff -up openssh-5.8p1/auth2-pubkey.c.fingerprint openssh-5.8p1/auth2-pubkey.c
--- openssh-5.8p1/auth2-pubkey.c.fingerprint 2010-12-01 01:50:14.000000000 +0100
+++ openssh-5.8p1/auth2-pubkey.c 2011-02-24 10:30:47.000000000 +0100
@@ -319,10 +319,10 @@ user_key_allowed2(struct passwd *pw, Key
continue;
if (!key_is_cert_authority)
continue;
- fp = key_fingerprint(found, SSH_FP_MD5,
- SSH_FP_HEX);
- debug("matching CA found: file %s, line %lu, %s %s",
- file, linenum, key_type(found), fp);
+ fp = key_selected_fingerprint(found, SSH_FP_HEX);
+ debug("matching CA found: file %s, line %lu, %s %s%s",
+ file, linenum, key_type(found),
+ key_fingerprint_prefix(), fp);
/*
* If the user has specified a list of principals as
* a key option, then prefer that list to matching
@@ -362,9 +362,9 @@ user_key_allowed2(struct passwd *pw, Key
found_key = 1;
debug("matching key found: file %s, line %lu",
file, linenum);
- fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX);
- verbose("Found matching %s key: %s",
- key_type(found), fp);
+ fp = key_selected_fingerprint(found, SSH_FP_HEX);
+ verbose("Found matching %s key: %s%s",
+ key_type(found), key_fingerprint_prefix(), fp);
xfree(fp);
break;
}
@@ -388,13 +388,13 @@ user_cert_trusted_ca(struct passwd *pw,
if (!key_is_cert(key) || options.trusted_user_ca_keys == NULL)
return 0;
- ca_fp = key_fingerprint(key->cert->signature_key,
- SSH_FP_MD5, SSH_FP_HEX);
+ ca_fp = key_selected_fingerprint(key->cert->signature_key, SSH_FP_HEX);
if (key_in_file(key->cert->signature_key,
options.trusted_user_ca_keys, 1) != 1) {
- debug2("%s: CA %s %s is not listed in %s", __func__,
- key_type(key->cert->signature_key), ca_fp,
+ debug2("%s: CA %s%s %s is not listed in %s", __func__,
+ key_type(key->cert->signature_key),
+ key_fingerprint_prefix(), ca_fp,
options.trusted_user_ca_keys);
goto out;
}
diff -up openssh-5.8p1/auth.c.fingerprint openssh-5.8p1/auth.c
--- openssh-5.8p1/auth.c.fingerprint 2010-12-01 02:21:51.000000000 +0100
+++ openssh-5.8p1/auth.c 2011-02-24 10:30:47.000000000 +0100
@@ -639,9 +639,10 @@ auth_key_is_revoked(Key *key)
return 1;
case 1:
/* Key revoked */
- key_fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
+ key_fp = key_selected_fingerprint(key, SSH_FP_HEX);
error("WARNING: authentication attempt with a revoked "
- "%s key %s ", key_type(key), key_fp);
+ "%s key %s%s ", key_type(key),
+ key_fingerprint_prefix(), key_fp);
xfree(key_fp);
return 1;
}
diff -up openssh-5.8p1/auth-rsa.c.fingerprint openssh-5.8p1/auth-rsa.c
--- openssh-5.8p1/auth-rsa.c.fingerprint 2010-12-04 23:01:47.000000000 +0100
+++ openssh-5.8p1/auth-rsa.c 2011-02-24 10:30:47.000000000 +0100
@@ -318,9 +318,9 @@ auth_rsa(Authctxt *authctxt, BIGNUM *cli
* options; this will be reset if the options cause the
* authentication to be rejected.
*/
- fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
- verbose("Found matching %s key: %s",
- key_type(key), fp);
+ fp = key_selected_fingerprint(key, SSH_FP_HEX);
+ verbose("Found matching %s key: %s%s",
+ key_type(key), key_fingerprint_prefix(), fp);
xfree(fp);
key_free(key);
diff -up openssh-5.8p1/key.c.fingerprint openssh-5.8p1/key.c
--- openssh-5.8p1/key.c.fingerprint 2011-02-04 01:48:34.000000000 +0100
+++ openssh-5.8p1/key.c 2011-02-24 10:33:05.000000000 +0100
@@ -594,6 +594,32 @@ key_fingerprint(Key *k, enum fp_type dgs
return retval;
}
+int
+key_fingerprint_selection(void)
+{
+ char *env;
+ static int rv = -1;
+
+ if (rv == -1) {
+ env = getenv("SSH_FINGERPRINT_TYPE");
+ rv = env && !strcmp (env, "sha");
+ }
+ return rv;
+}
+
+char *
+key_selected_fingerprint(Key *k, enum fp_rep dgst_rep)
+{
+ return key_fingerprint(k, key_fingerprint_selection() ?
+ SSH_FP_SHA1 : SSH_FP_MD5, dgst_rep);
+}
+
+char *
+key_fingerprint_prefix(void)
+{
+ return key_fingerprint_selection() ? "sha1:" : "";
+}
+
/*
* Reads a multiple-precision integer in decimal from the buffer, and advances
* the pointer. The integer must already be initialized. This function is
diff -up openssh-5.8p1/key.h.fingerprint openssh-5.8p1/key.h
--- openssh-5.8p1/key.h.fingerprint 2010-11-05 00:19:49.000000000 +0100
+++ openssh-5.8p1/key.h 2011-02-24 10:30:47.000000000 +0100
@@ -96,6 +96,9 @@ int key_equal_public(const Key *, cons
int key_equal(const Key *, const Key *);
char *key_fingerprint(Key *, enum fp_type, enum fp_rep);
u_char *key_fingerprint_raw(Key *, enum fp_type, u_int *);
+int key_fingerprint_selection(void);
+char *key_selected_fingerprint(Key *, enum fp_rep);
+char *key_fingerprint_prefix(void);
const char *key_type(const Key *);
const char *key_cert_type(const Key *);
int key_write(const Key *, FILE *);
diff -up openssh-5.8p1/ssh-add.c.fingerprint openssh-5.8p1/ssh-add.c
--- openssh-5.8p1/ssh-add.c.fingerprint 2010-11-11 04:17:02.000000000 +0100
+++ openssh-5.8p1/ssh-add.c 2011-02-24 10:30:47.000000000 +0100
@@ -280,10 +280,10 @@ list_identities(AuthenticationConnection
key = ssh_get_next_identity(ac, &comment, version)) {
had_identities = 1;
if (do_fp) {
- fp = key_fingerprint(key, SSH_FP_MD5,
- SSH_FP_HEX);
- printf("%d %s %s (%s)\n",
- key_size(key), fp, comment, key_type(key));
+ fp = key_selected_fingerprint(key, SSH_FP_HEX);
+ printf("%d %s%s %s (%s)\n",
+ key_size(key), key_fingerprint_prefix(),
+ fp, comment, key_type(key));
xfree(fp);
} else {
if (!key_write(key, stdout))
diff -up openssh-5.8p1/ssh-agent.c.fingerprint openssh-5.8p1/ssh-agent.c
--- openssh-5.8p1/ssh-agent.c.fingerprint 2010-12-01 01:50:35.000000000 +0100
+++ openssh-5.8p1/ssh-agent.c 2011-02-24 10:30:47.000000000 +0100
@@ -199,9 +199,9 @@ confirm_key(Identity *id)
char *p;
int ret = -1;
- p = key_fingerprint(id->key, SSH_FP_MD5, SSH_FP_HEX);
- if (ask_permission("Allow use of key %s?\nKey fingerprint %s.",
- id->comment, p))
+ p = key_selected_fingerprint(id->key, SSH_FP_HEX);
+ if (ask_permission("Allow use of key %s?\nKey fingerprint %s%s.",
+ id->comment, key_fingerprint_prefix(), p))
ret = 0;
xfree(p);
diff -up openssh-5.8p1/sshconnect2.c.fingerprint openssh-5.8p1/sshconnect2.c
--- openssh-5.8p1/sshconnect2.c.fingerprint 2010-12-01 02:21:51.000000000 +0100
+++ openssh-5.8p1/sshconnect2.c 2011-02-24 10:30:47.000000000 +0100
@@ -590,8 +590,9 @@ input_userauth_pk_ok(int type, u_int32_t
key->type, pktype);
goto done;
}
- fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
- debug2("input_userauth_pk_ok: fp %s", fp);
+ fp = key_selected_fingerprint(key, SSH_FP_HEX);
+ debug2("input_userauth_pk_ok: fp %s%s",
+ key_fingerprint_prefix(), fp);
xfree(fp);
/*
@@ -1203,8 +1204,9 @@ sign_and_send_pubkey(Authctxt *authctxt,
int have_sig = 1;
char *fp;
- fp = key_fingerprint(id->key, SSH_FP_MD5, SSH_FP_HEX);
- debug3("sign_and_send_pubkey: %s %s", key_type(id->key), fp);
+ fp = key_selected_fingerprint(id->key, SSH_FP_HEX);
+ debug3("sign_and_send_pubkey: %s %s%s", key_type(id->key),
+ key_fingerprint_prefix(), fp);
xfree(fp);
if (key_to_blob(id->key, &blob, &bloblen) == 0) {
diff -up openssh-5.8p1/sshconnect.c.fingerprint openssh-5.8p1/sshconnect.c
--- openssh-5.8p1/sshconnect.c.fingerprint 2011-01-16 13:17:59.000000000 +0100
+++ openssh-5.8p1/sshconnect.c 2011-02-24 10:30:47.000000000 +0100
@@ -798,10 +798,10 @@ check_host_key(char *hostname, struct so
"key for IP address '%.128s' to the list "
"of known hosts.", type, ip);
} else if (options.visual_host_key) {
- fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
- ra = key_fingerprint(host_key, SSH_FP_MD5,
- SSH_FP_RANDOMART);
- logit("Host key fingerprint is %s\n%s\n", fp, ra);
+ fp = key_selected_fingerprint(host_key, SSH_FP_HEX);
+ ra = key_selected_fingerprint(host_key, SSH_FP_RANDOMART);
+ logit("Host key fingerprint is %s%s\n%s\n",
+ key_fingerprint_prefix(), fp, ra);
xfree(ra);
xfree(fp);
}
@@ -838,9 +838,8 @@ check_host_key(char *hostname, struct so
else
snprintf(msg1, sizeof(msg1), ".");
/* The default */
- fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
- ra = key_fingerprint(host_key, SSH_FP_MD5,
- SSH_FP_RANDOMART);
+ fp = key_selected_fingerprint(host_key, SSH_FP_HEX);
+ ra = key_selected_fingerprint(host_key, SSH_FP_RANDOMART);
msg2[0] = '\0';
if (options.verify_host_key_dns) {
if (matching_host_key_dns)
@@ -855,10 +854,11 @@ check_host_key(char *hostname, struct so
snprintf(msg, sizeof(msg),
"The authenticity of host '%.200s (%s)' can't be "
"established%s\n"
- "%s key fingerprint is %s.%s%s\n%s"
+ "%s key fingerprint is %s%s.%s%s\n%s"
"Are you sure you want to continue connecting "
"(yes/no)? ",
- host, ip, msg1, type, fp,
+ host, ip, msg1, type,
+ key_fingerprint_prefix(), fp,
options.visual_host_key ? "\n" : "",
options.visual_host_key ? ra : "",
msg2);
@@ -1104,8 +1104,9 @@ verify_host_key(char *host, struct socka
int flags = 0;
char *fp;
- fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
- debug("Server host key: %s %s", key_type(host_key), fp);
+ fp = key_selected_fingerprint(host_key, SSH_FP_HEX);
+ debug("Server host key: %s %s%s", key_type(host_key),
+ key_fingerprint_prefix(), fp);
xfree(fp);
/* XXX certs are not yet supported for DNS */
@@ -1214,14 +1215,15 @@ show_other_keys(struct hostkeys *hostkey
continue;
if (!lookup_key_in_hostkeys_by_type(hostkeys, type[i], &found))
continue;
- fp = key_fingerprint(found->key, SSH_FP_MD5, SSH_FP_HEX);
- ra = key_fingerprint(found->key, SSH_FP_MD5, SSH_FP_RANDOMART);
+ fp = key_selected_fingerprint(found->key, SSH_FP_HEX);
+ ra = key_selected_fingerprint(found->key, SSH_FP_RANDOMART);
logit("WARNING: %s key found for host %s\n"
"in %s:%lu\n"
- "%s key fingerprint %s.",
+ "%s key fingerprint %s%s.",
key_type(found->key),
found->host, found->file, found->line,
- key_type(found->key), fp);
+ key_type(found->key),
+ key_fingerprint_prefix(), fp);
if (options.visual_host_key)
logit("%s", ra);
xfree(ra);
@@ -1236,7 +1238,7 @@ warn_changed_key(Key *host_key)
{
char *fp;
- fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
+ fp = key_selected_fingerprint(host_key, SSH_FP_HEX);
error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
error("@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @");
@@ -1244,8 +1246,8 @@ warn_changed_key(Key *host_key)
error("IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!");
error("Someone could be eavesdropping on you right now (man-in-the-middle attack)!");
error("It is also possible that a host key has just been changed.");
- error("The fingerprint for the %s key sent by the remote host is\n%s.",
- key_type(host_key), fp);
+ error("The fingerprint for the %s key sent by the remote host is\n%s%s.",
+ key_type(host_key),key_fingerprint_prefix(), fp);
error("Please contact your system administrator.");
xfree(fp);
diff -up openssh-5.8p1/ssh-keygen.c.fingerprint openssh-5.8p1/ssh-keygen.c
--- openssh-5.8p1/ssh-keygen.c.fingerprint 2011-01-11 07:20:31.000000000 +0100
+++ openssh-5.8p1/ssh-keygen.c 2011-02-24 10:30:47.000000000 +0100
@@ -714,13 +714,14 @@ do_fingerprint(struct passwd *pw)
{
FILE *f;
Key *public;
- char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra;
+ char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra, *pfx;
int i, skip = 0, num = 0, invalid = 1;
enum fp_rep rep;
enum fp_type fptype;
struct stat st;
- fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
+ fptype = print_bubblebabble ? SSH_FP_SHA1 : key_fingerprint_selection();
+ pfx = print_bubblebabble ? "" : key_fingerprint_prefix();
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
if (!have_identity)
@@ -732,8 +733,8 @@ do_fingerprint(struct passwd *pw)
public = key_load_public(identity_file, &comment);
if (public != NULL) {
fp = key_fingerprint(public, fptype, rep);
- ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
- printf("%u %s %s (%s)\n", key_size(public), fp, comment,
+ ra = key_selected_fingerprint(public, SSH_FP_RANDOMART);
+ printf("%u %s%s %s (%s)\n", key_size(public), pfx, fp, comment,
key_type(public));
if (log_level >= SYSLOG_LEVEL_VERBOSE)
printf("%s\n", ra);
@@ -798,8 +799,8 @@ do_fingerprint(struct passwd *pw)
}
comment = *cp ? cp : comment;
fp = key_fingerprint(public, fptype, rep);
- ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
- printf("%u %s %s (%s)\n", key_size(public), fp,
+ ra = key_selected_fingerprint(public, SSH_FP_RANDOMART);
+ printf("%u %s%s %s (%s)\n", key_size(public), pfx, fp,
comment ? comment : "no comment", key_type(public));
if (log_level >= SYSLOG_LEVEL_VERBOSE)
printf("%s\n", ra);
@@ -823,13 +824,15 @@ printhost(FILE *f, const char *name, Key
if (print_fingerprint) {
enum fp_rep rep;
enum fp_type fptype;
- char *fp, *ra;
+ char *fp, *ra, *pfx;
- fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
+ fptype = print_bubblebabble ? SSH_FP_SHA1 : key_fingerprint_selection();
+ pfx = print_bubblebabble ? "" : key_fingerprint_prefix();
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
+
fp = key_fingerprint(public, fptype, rep);
- ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
- printf("%u %s %s (%s)\n", key_size(public), fp, name,
+ ra = key_selected_fingerprint(public, SSH_FP_RANDOMART);
+ printf("%u %s%s %s (%s)\n", key_size(public), pfx, fp, name,
key_type(public));
if (log_level >= SYSLOG_LEVEL_VERBOSE)
printf("%s\n", ra);
@@ -1695,16 +1698,17 @@ do_show_cert(struct passwd *pw)
fatal("%s is not a certificate", identity_file);
v00 = key->type == KEY_RSA_CERT_V00 || key->type == KEY_DSA_CERT_V00;
- key_fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
- ca_fp = key_fingerprint(key->cert->signature_key,
- SSH_FP_MD5, SSH_FP_HEX);
+ key_fp = key_selected_fingerprint(key, SSH_FP_HEX);
+ ca_fp = key_selected_fingerprint(key->cert->signature_key, SSH_FP_HEX);
printf("%s:\n", identity_file);
printf(" Type: %s %s certificate\n", key_ssh_name(key),
key_cert_type(key));
- printf(" Public key: %s %s\n", key_type(key), key_fp);
- printf(" Signing CA: %s %s\n",
- key_type(key->cert->signature_key), ca_fp);
+ printf(" Public key: %s %s%s\n", key_type(key),
+ key_fingerprint_prefix(), key_fp);
+ printf(" Signing CA: %s %s%s\n",
+ key_type(key->cert->signature_key),
+ key_fingerprint_prefix(), ca_fp);
printf(" Key ID: \"%s\"\n", key->cert->key_id);
if (!v00) {
printf(" Serial: %llu\n",
@@ -2249,13 +2253,12 @@ passphrase_again:
fclose(f);
if (!quiet) {
- char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
- char *ra = key_fingerprint(public, SSH_FP_MD5,
- SSH_FP_RANDOMART);
+ char *fp = key_selected_fingerprint(public, SSH_FP_HEX);
+ char *ra = key_selected_fingerprint(public, SSH_FP_RANDOMART);
printf("Your public key has been saved in %s.\n",
identity_file);
printf("The key fingerprint is:\n");
- printf("%s %s\n", fp, comment);
+ printf("%s%s %s\n", key_fingerprint_prefix(), fp, comment);
printf("The key's randomart image is:\n");
printf("%s\n", ra);
xfree(ra);
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