sig: Move marshalling responsibility into sign function

[secnet.git] / rsa.c

diff --git a/rsa.c b/rsa.c
index 068cf41dfc13dfb94a35ec1656799ce0cdbd96c4..dfbc2372f605670842382c5cbe8c1e9af742c916 100644 (file)
--- a/rsa.c
+++ b/rsa.c
@@ -35,6 +35,7 @@
 #include <gmp.h>
 #include "secnet.h"
 #include "util.h"
+#include "unaligned.h"
 
 #define AUTHFILE_ID_STRING "SSH PRIVATE KEY FILE FORMAT 1.1\n"
 
@@ -42,7 +43,7 @@
 
 struct rsapriv {
     closure_t cl;
-    struct rsaprivkey_if ops;
+    struct sigprivkey_if ops;
     struct cloc loc;
     MP_INT n;
     MP_INT p, dp;
@@ -51,7 +52,7 @@ struct rsapriv {
 };
 struct rsapub {
     closure_t cl;
-    struct rsapubkey_if ops;
+    struct sigpubkey_if ops;
     struct cloc loc;
     MP_INT e;
     MP_INT n;
@@ -114,11 +115,13 @@ static void emsa_pkcs1(MP_INT *n, MP_INT *m,
     mpz_set_str(m, buff, 16);
 }
 
-static string_t rsa_sign(void *sst, uint8_t *data, int32_t datalen)
+static bool_t rsa_sign(void *sst, uint8_t *data, int32_t datalen,
+                      struct buffer_if *msg)
 {
     struct rsapriv *st=sst;
     MP_INT a, b, u, v, tmp, tmp2;
-    string_t signature;
+    string_t signature = 0;
+    bool_t ok;
 
     mpz_init(&a);
     mpz_init(&b);
@@ -162,12 +165,25 @@ static string_t rsa_sign(void *sst, uint8_t *data, int32_t datalen)
 
     signature=write_mpstring(&b);
 
+    uint8_t *op = buf_append(msg,2);
+    if (!op) { ok=False; goto out; }
+    size_t l = strlen(signature);
+    assert(l < 65536);
+    put_uint16(op, l);
+    op = buf_append(msg,l);
+    if (!op) { ok=False; goto out; }
+    memcpy(op, signature, l);
+
+    ok = True;
+
+ out:
+    free(signature);
     mpz_clear(&b);
     mpz_clear(&a);
-    return signature;
+    return ok;
 }
 
-static rsa_checksig_fn rsa_sig_check;
+static sig_checksig_fn rsa_sig_check;
 static bool_t rsa_sig_check(void *sst, uint8_t *data, int32_t datalen,
                            cstring_t signature)
 {
@@ -203,7 +219,7 @@ static list_t *rsapub_apply(closure_t *self, struct cloc loc, dict_t *context,
 
     NEW(st);
     st->cl.description="rsapub";
-    st->cl.type=CL_RSAPUBKEY;
+    st->cl.type=CL_SIGPUBKEY;
     st->cl.apply=NULL;
     st->cl.interface=&st->ops;
     st->ops.st=st;
@@ -281,7 +297,7 @@ static list_t *rsapriv_apply(closure_t *self, struct cloc loc, dict_t *context,
 
     NEW(st);
     st->cl.description="rsapriv";
-    st->cl.type=CL_RSAPRIVKEY;
+    st->cl.type=CL_SIGPRIVKEY;
     st->cl.apply=NULL;
     st->cl.interface=&st->ops;
     st->ops.st=st;
@@ -292,7 +308,7 @@ static list_t *rsapriv_apply(closure_t *self, struct cloc loc, dict_t *context,
     i=list_elem(args,0);
     if (i) {
        if (i->type!=t_string) {
-           cfgfatal(i->loc,"rsa-public","first argument must be a string\n");
+           cfgfatal(i->loc,"rsa-private","first argument must be a string\n");
        }
        filename=i->data.string;
     } else {