- markus@cvs.openbsd.org 2001/08/01 23:33:09

     [ssh-keygen.c]
     allow uploading RSA keys for non-default AUT0 (sha1 over passphrase
     like sectok).

2 files changed, 42 insertions, 13 deletions

diff --git a/ChangeLog b/ChangeLog
index 996169ee4..e42edd183 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -94,6 +94,10 @@
    - markus@cvs.openbsd.org 2001/08/01 22:16:45
      [ssh.1 sshd.8]
      refer to current ietf drafts for protocol v2
+   - markus@cvs.openbsd.org 2001/08/01 23:33:09
+     [ssh-keygen.c]
+     allow uploading RSA keys for non-default AUT0 (sha1 over passphrase 
+     like sectok).
 
 20010803
  - (djm) Fix interrupted read in entropy gatherer. Spotted by markus@ on
@@ -6204,4 +6208,4 @@
  - Wrote replacements for strlcpy and mkdtemp
  - Released 1.0pre1
 
-$Id: ChangeLog,v 1.1450 2001/08/06 21:38:10 mouring Exp $
+$Id: ChangeLog,v 1.1451 2001/08/06 21:40:04 mouring Exp $
diff --git a/ssh-keygen.c b/ssh-keygen.c
index 003357321..5fadad7cc 100644
--- a/ssh-keygen.c
+++ b/ssh-keygen.c
@@ -12,7 +12,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: ssh-keygen.c,v 1.73 2001/07/26 20:04:27 rees Exp $");
+RCSID("$OpenBSD: ssh-keygen.c,v 1.74 2001/08/01 23:33:09 markus Exp $");
 
 #include <openssl/evp.h>
 #include <openssl/pem.h>
@@ -380,6 +380,7 @@ do_print_public(struct passwd *pw)
         exit(0);
 }
 
+#ifdef SMARTCARD
 #define NUM_RSA_KEY_ELEMENTS 5+1
 #define COPY_RSA_KEY(x, i) \
         do { \
@@ -390,17 +391,33 @@ do_print_public(struct passwd *pw)
                         goto done; \
         } while(0)
 
+static int
+get_AUT0(char *aut0)
+{
+        EVP_MD *evp_md = EVP_sha1();
+        EVP_MD_CTX md;
+        char *pass;
+
+        pass = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
+        if (pass == NULL)
+                return -1;
+        EVP_DigestInit(&md, evp_md);
+        EVP_DigestUpdate(&md, pass, strlen(pass));
+        EVP_DigestFinal(&md, aut0, NULL);
+        memset(pass, 0, strlen(pass));
+        xfree(pass);
+        return 0;
+}
+
 static void
 do_upload(struct passwd *pw, int reader)
 {
-#ifndef SMARTCARD
-        fatal("no support for smartcards.");
-#else
         Key *prv = NULL;
         struct stat st;
         u_char *elements[NUM_RSA_KEY_ELEMENTS];
         u_char key_fid[2];
-        u_char AUT0[] = {0xad, 0x9f, 0x61, 0xfe, 0xfa, 0x20, 0xce, 0x63};
+        u_char DEFAUT0[] = {0xad, 0x9f, 0x61, 0xfe, 0xfa, 0x20, 0xce, 0x63};
+        u_char AUT0[EVP_MAX_MD_SIZE];
         int len, status = 1, i, fd = -1, ret;
         int sw = 0, cla = 0x00;
 
@@ -424,23 +441,27 @@ do_upload(struct passwd *pw, int reader)
         COPY_RSA_KEY(dmp1, 4);
         COPY_RSA_KEY(n, 5);
         len = BN_num_bytes(prv->rsa->n);
-        fd = sectok_open(reader, 0, &sw);
+        fd = sectok_open(reader, STONOWAIT, &sw);
         if (fd < 0) {
-                error("sectok_open failed");
+                error("sectok_open failed: %s", sectok_get_sw(sw));
                 goto done;
         }
         ret = sectok_reset(fd, 0, NULL, &sw);
         if (ret <= 0) {
-                error("sectok_reset failed");
+                error("sectok_reset failed: %s", sectok_get_sw(sw));
                 goto done;
         }
         if ((cla = cyberflex_inq_class(fd)) < 0) {
                 error("cyberflex_inq_class failed");
                 goto done;
         }
-        if (cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(AUT0)) < 0) {
-                error("cyberflex_verify_AUT0 failed");
-                goto done;
+        memcpy(AUT0, DEFAUT0, sizeof(DEFAUT0));
+        if (cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
+                if (get_AUT0(AUT0) < 0 ||
+                    cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
+                        error("cyberflex_verify_AUT0 failed");
+                        goto done;
+                }
         }
         key_fid[0] = 0x00;
         key_fid[1] = 0x12;
@@ -473,8 +494,8 @@ done:
         if (fd != -1)
                 sectok_close(fd);
         exit(status);
-#endif
 }
+#endif
 
 static void
 do_fingerprint(struct passwd *pw)
@@ -878,7 +899,11 @@ main(int ac, char **av)
         if (print_public)
                 do_print_public(pw);
         if (reader != -1)
+#ifdef SMARTCARD
                 do_upload(pw, reader);
+#else
+                fatal("no support for smartcards.");
+#endif
 
         arc4random_stir();