1 files changed, 93 insertions, 1 deletions

diff --git a/krl.c b/krl.c
index 03476dedd..9da7126e2 100644
--- a/krl.c
+++ b/krl.c
@@ -14,7 +14,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $OpenBSD: krl.c,v 1.47 2020/01/25 23:02:13 djm Exp $ */
+/* $OpenBSD: krl.c,v 1.48 2020/04/03 02:26:56 djm Exp $ */
 
 #include "includes.h"
 
@@ -38,6 +38,7 @@
 #include "log.h"
 #include "digest.h"
 #include "bitmap.h"
+#include "utf8.h"
 
 #include "krl.h"
 
@@ -1355,3 +1356,94 @@ ssh_krl_file_contains_key(const char *path, const struct sshkey *key)
                 errno = oerrno;
         return r;
 }
+
+int
+krl_dump(struct ssh_krl *krl, FILE *f)
+{
+        struct sshkey *key = NULL;
+        struct revoked_blob *rb;
+        struct revoked_certs *rc;
+        struct revoked_serial *rs;
+        struct revoked_key_id *rki;
+        int r, ret = 0;
+        char *fp, timestamp[64];
+
+        /* Try to print in a KRL spec-compatible format */
+        format_timestamp(krl->generated_date, timestamp, sizeof(timestamp));
+        fprintf(f, "# KRL version %lld\n", krl->krl_version);
+        fprintf(f, "# Generated at %s\n", timestamp);
+        if (krl->comment != NULL && *krl->comment != '\0') {
+                r = INT_MAX;
+                asmprintf(&fp, INT_MAX, &r, "%s", krl->comment);
+                fprintf(f, "# Comment: %s\n", fp);
+                free(fp);
+        }
+        fputc('\n', f);
+
+        RB_FOREACH(rb, revoked_blob_tree, &krl->revoked_keys) {
+                if ((r = sshkey_from_blob(rb->blob, rb->len, &key)) != 0) {
+                        ret = SSH_ERR_INVALID_FORMAT;
+                        error("Parse key in KRL: %s", ssh_err(r));
+                        continue;
+                }
+                if ((fp = sshkey_fingerprint(key, SSH_FP_HASH_DEFAULT,
+                    SSH_FP_DEFAULT)) == NULL) {
+                        ret = SSH_ERR_INVALID_FORMAT;
+                        error("sshkey_fingerprint failed");
+                        continue;
+                }
+                fprintf(f, "hash: SHA256:%s # %s\n", fp, sshkey_ssh_name(key));
+                free(fp);
+                free(key);
+        }
+        RB_FOREACH(rb, revoked_blob_tree, &krl->revoked_sha256s) {
+                fp = tohex(rb->blob, rb->len);
+                fprintf(f, "hash: SHA256:%s\n", fp);
+                free(fp);
+        }
+        RB_FOREACH(rb, revoked_blob_tree, &krl->revoked_sha1s) {
+                /*
+                 * There is not KRL spec keyword for raw SHA1 hashes, so
+                 * print them as comments.
+                 */
+                fp = tohex(rb->blob, rb->len);
+                fprintf(f, "# hash SHA1:%s\n", fp);
+                free(fp);
+        }
+
+        TAILQ_FOREACH(rc, &krl->revoked_certs, entry) {
+                fputc('\n', f);
+                if (rc->ca_key == NULL)
+                        fprintf(f, "# Wildcard CA\n");
+                else {
+                        if ((fp = sshkey_fingerprint(rc->ca_key,
+                            SSH_FP_HASH_DEFAULT, SSH_FP_DEFAULT)) == NULL) {
+                                ret = SSH_ERR_INVALID_FORMAT;
+                                error("sshkey_fingerprint failed");
+                                continue;
+                        }
+                        fprintf(f, "# CA key %s %s\n",
+                            sshkey_ssh_name(rc->ca_key), fp);
+                        free(fp);
+                }
+                RB_FOREACH(rs, revoked_serial_tree, &rc->revoked_serials) {
+                        if (rs->lo == rs->hi)
+                                fprintf(f, "serial: %lld\n", rs->lo);
+                        else {
+                                fprintf(f, "serial: %lld-%lld\n",
+                                    rs->lo, rs->hi);
+                        }
+                }
+                RB_FOREACH(rki, revoked_key_id_tree, &rc->revoked_key_ids) {
+                        /*
+                         * We don't want key IDs with embedded newlines to
+                         * mess up the display.
+                         */
+                        r = INT_MAX;
+                        asmprintf(&fp, INT_MAX, &r, "%s", rki->key_id);
+                        fprintf(f, "id: %s\n", fp);
+                        free(fp);
+                }
+        }
+        return ret;
+}