X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/db3f7b6972f3b003c0413b78afcfbe295ffe0b97..92583637b25b6bde926f9ca6be7b085e5ac8b1e6:/src/src/tlscert-gnu.c

diff --git a/src/src/tlscert-gnu.c b/src/src/tlscert-gnu.c
index 572f97130..a09fda0b9 100644
--- a/src/src/tlscert-gnu.c
+++ b/src/src/tlscert-gnu.c
@@ -20,13 +20,16 @@ tls.c when USE_GNUTLS has been set.
 
 /*****************************************************
 *  Export/import a certificate, binary/printable
-*****************************************************/
-int
+******************************************************
+Return: boolean success
+*/
+
+BOOL
 tls_export_cert(uschar * buf, size_t buflen, void * cert)
 {
 size_t sz = buflen;
-void * reset_point = store_get(0);
-int fail;
+rmark reset_point = store_mark();
+BOOL fail;
 const uschar * cp;
 
 if ((fail = gnutls_x509_crt_export((gnutls_x509_crt_t)cert,
@@ -34,7 +37,7 @@ if ((fail = gnutls_x509_crt_export((gnutls_x509_crt_t)cert,
   {
   log_write(0, LOG_MAIN, "TLS error in certificate export: %s",
     gnutls_strerror(fail));
-  return 1;
+  return FALSE;
   }
 if ((cp = string_printing(buf)) != buf)
   {
@@ -43,16 +46,17 @@ if ((cp = string_printing(buf)) != buf)
     fail = 1;
   }
 store_reset(reset_point);
-return fail;
+return !fail;
 }
 
-int
+/* On error, NULL out the destination */
+BOOL
 tls_import_cert(const uschar * buf, void ** cert)
 {
-void * reset_point = store_get(0);
+rmark reset_point = store_mark();
 gnutls_datum_t datum;
 gnutls_x509_crt_t crt = *(gnutls_x509_crt_t *)cert;
-int fail = 0;
+int rc;
 
 if (crt)
   gnutls_x509_crt_deinit(crt);
@@ -63,17 +67,15 @@ gnutls_x509_crt_init(&crt);
 
 datum.data = string_unprinting(US buf);
 datum.size = Ustrlen(datum.data);
-if ((fail = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM)))
+if ((rc = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM)))
   {
   log_write(0, LOG_MAIN, "TLS error in certificate import: %s",
-    gnutls_strerror(fail));
-  fail = 1;
+    gnutls_strerror(rc));
+  crt = NULL;
   }
-else
-  *cert = (void *)crt;
-
+*cert = (void *)crt;
 store_reset(reset_point);
-return fail;
+return rc != 0;
 }
 
 void
@@ -112,7 +114,7 @@ size_t len = 32;
 if (mod && Ustrcmp(mod, "int") == 0)
   return string_sprintf("%u", (unsigned)t);
 
-cp = store_get(len);
+cp = store_get(len, FALSE);
 if (f.timestamps_utc)
   {
   uschar * tz = to_tz(US"GMT0");
@@ -146,7 +148,7 @@ if ((ret = gnutls_x509_crt_get_issuer_dn(cert, CS cp, &siz))
     != GNUTLS_E_SHORT_MEMORY_BUFFER)
   return g_err("gi0", __FUNCTION__, ret);
 
-cp = store_get(siz);
+cp = store_get(siz, TRUE);
 if ((ret = gnutls_x509_crt_get_issuer_dn(cert, CS cp, &siz)) < 0)
   return g_err("gi1", __FUNCTION__, ret);
 
@@ -200,7 +202,7 @@ if ((ret = gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, CS cp1, &len))
     != GNUTLS_E_SHORT_MEMORY_BUFFER)
   return g_err("gs0", __FUNCTION__, ret);
 
-cp1 = store_get(len*4+1);
+cp1 = store_get(len*4+1, TRUE);
 if (gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, CS cp1, &len) != 0)
   return g_err("gs1", __FUNCTION__, ret);
 
@@ -230,7 +232,7 @@ if ((ret = gnutls_x509_crt_get_dn(cert, CS cp, &siz))
     != GNUTLS_E_SHORT_MEMORY_BUFFER)
   return g_err("gs0", __FUNCTION__, ret);
 
-cp = store_get(siz);
+cp = store_get(siz, TRUE);
 if ((ret = gnutls_x509_crt_get_dn(cert, CS cp, &siz)) < 0)
   return g_err("gs1", __FUNCTION__, ret);
 
@@ -258,7 +260,7 @@ ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
 if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
   return g_err("ge0", __FUNCTION__, ret);
 
-cp1 = store_get(siz*4 + 1);
+cp1 = store_get(siz*4 + 1, TRUE);
 
 ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
   CS oid, idx, CS cp1, &siz, &crit);
@@ -314,7 +316,7 @@ for (int index = 0;; index++)
       return g_err("gs0", __FUNCTION__, ret);
     }
 
-  ele = store_get(siz+1);
+  ele = store_get(siz+1, TRUE);
   if ((ret = gnutls_x509_crt_get_subject_alt_name(
     (gnutls_x509_crt_t)cert, index, ele, &siz, NULL)) < 0)
     return g_err("gs1", __FUNCTION__, ret);
@@ -397,7 +399,7 @@ for (int index = 0;; index++)
       return g_err("gc0", __FUNCTION__, ret);
     }
 
-  ele = store_get(siz);
+  ele = store_get(siz, TRUE);
   if ((ret = gnutls_x509_crt_get_crl_dist_points(
       (gnutls_x509_crt_t)cert, index, ele, &siz, NULL, NULL)) < 0)
     return g_err("gc1", __FUNCTION__, ret);
@@ -420,7 +422,7 @@ int fail;
 
 if (  (fail = gnutls_x509_crt_export((gnutls_x509_crt_t)cert,
 	GNUTLS_X509_FMT_DER, cp, &len)) != GNUTLS_E_SHORT_MEMORY_BUFFER
-   || !(cp = store_get((int)len))
+   || !(cp = store_get((int)len, TRUE), TRUE)	/* tainted */
    || (fail = gnutls_x509_crt_export((gnutls_x509_crt_t)cert,
         GNUTLS_X509_FMT_DER, cp, &len))
    )
@@ -429,7 +431,7 @@ if (  (fail = gnutls_x509_crt_export((gnutls_x509_crt_t)cert,
     gnutls_strerror(fail));
   return NULL;
   }
-return b64encode(cp, (int)len);
+return b64encode(CUS cp, (int)len);
 }
 
 
@@ -445,7 +447,7 @@ if ((ret = gnutls_x509_crt_get_fingerprint(cert, algo, NULL, &siz))
     != GNUTLS_E_SHORT_MEMORY_BUFFER)
   return g_err("gf0", __FUNCTION__, ret);
 
-cp = store_get(siz*3+1);
+cp = store_get(siz*3+1, TRUE);
 if ((ret = gnutls_x509_crt_get_fingerprint(cert, algo, cp, &siz)) < 0)
   return g_err("gf1", __FUNCTION__, ret);