rsa1: Provide rsa1_loadpriv function

[secnet.git] / rsa.c

diff --git a/rsa.c b/rsa.c
index d5d80ff6664dbcb0e0a1d0a07960c67fb3bcbf92..28f9d865b2db2048b5f64c21683c0845f7f87cc1 100644 (file)
--- a/rsa.c
+++ b/rsa.c
@@ -337,6 +337,9 @@ struct rsapriv_load_ctx {
        struct {
            struct cloc loc;
        } apply;
+       struct {
+           struct log_if *log;
+       } tryload;
     } u;
 };
 
@@ -618,6 +621,59 @@ error_out:
     goto out;
 }
 
+FORMAT(printf,4,0)
+static void verror_tryload(struct rsapriv_load_ctx *l,
+                          FILE *maybe_f, bool_t unsup,
+                          const char *message, va_list args)
+{
+    int class=unsup ? M_DEBUG : M_ERR;
+    slilog_part(l->u.tryload.log,class,"rsa1priv load: ");
+    vslilog(l->u.tryload.log,class,message,args);
+}
+
+static bool_t postreadcheck_tryload(struct rsapriv_load_ctx *l, FILE *f)
+{
+    assert(!ferror(f));
+    if (feof(f)) { load_error(l,0,0,"eof mid-integer"); return False; }
+    return True;
+}
+
+bool_t rsa1_loadpriv(const struct sigscheme_info *algo,
+                    struct buffer_if *privkeydata,
+                    struct sigprivkey_if **sigpriv_r,
+                    struct log_if *log)
+{
+    FILE *f=0;
+    struct rsapriv *st=0;
+
+    f=fmemopen(privkeydata->start,privkeydata->size,"r");
+    if (!f) {
+       slilog(log,M_ERR,"failed to fmemopen private key file\n");
+       goto error_out;
+    }
+
+    struct cloc loc;
+    loc.file="dynamically loaded";
+    loc.line=0;
+
+    struct rsapriv_load_ctx l[1];
+    l->verror=verror_tryload;
+    l->postreadcheck=postreadcheck_tryload;
+    l->u.tryload.log=log;
+
+    st=rsa_loadpriv_core(l,f,loc,True);
+    if (!st) goto error_out;
+    goto out;
+
+ error_out:
+    if (st) { free(st); st=0; }
+ out:
+    if (f) fclose(f);
+    if (!st) return False;
+    *sigpriv_r=&st->ops;
+    return True;
+}
+
 static void verror_cfgfatal(struct rsapriv_load_ctx *l,
                            FILE *maybe_f, bool_t unsup,
                            const char *message, va_list args)