X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/152e7604f63fcaebcf01efda0a9aae33127eb369..1fbf41cdf61bc864662c7b766a1db38ae888db20:/src/src/tlscert-openssl.c

diff --git a/src/src/tlscert-openssl.c b/src/src/tlscert-openssl.c
index f2e482ba7..f9808b354 100644
--- a/src/src/tlscert-openssl.c
+++ b/src/src/tlscert-openssl.c
@@ -2,7 +2,7 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) Jeremy Harris 2014 - 2015 */
+/* Copyright (c) Jeremy Harris 2014 - 2019 */
 
 /* This module provides TLS (aka SSL) support for Exim using the OpenSSL
 library. It is #included into the tls.c file when that library is used.
@@ -17,6 +17,19 @@ library. It is #included into the tls.c file when that library is used.
 #include <openssl/rand.h>
 #include <openssl/x509v3.h>
 
+#ifdef LIBRESSL_VERSION_NUMBER	/* LibreSSL */
+# if LIBRESSL_VERSION_NUMBER >= 0x2090000fL
+#  define EXIM_HAVE_ASN1_MACROS
+# endif
+#else				/* OpenSSL */
+# if OPENSSL_VERSION_NUMBER >= 0x10100000L
+#  define EXIM_HAVE_ASN1_MACROS
+# endif
+#endif
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+# define ASN1_STRING_get0_data ASN1_STRING_data
+#endif
 
 /*****************************************************
 *  Export/import a certificate, binary/printable
@@ -75,9 +88,14 @@ return fail;
 }
 
 void
-tls_free_cert(void * cert)
+tls_free_cert(void ** cert)
 {
-X509_free((X509 *)cert);
+X509 * x = *(X509 **)cert;
+if (x)
+  {
+  X509_free(x);
+  *cert = NULL;
+  }
 }
 
 
@@ -114,7 +132,7 @@ int len;
 if (!bp)
   return badalloc();
 len = ASN1_TIME_print(bp, asntime);
-len = len > 0 ? (int) BIO_get_mem_data(bp, &s) : 0;
+len = len > 0 ? (int) BIO_get_mem_data(bp, CSS &s) : 0;
 
 if (mod && Ustrcmp(mod, "raw") == 0)		/* native ASN */
   s = string_copyn(s, len);
@@ -122,7 +140,7 @@ else
   {
   struct tm tm;
   struct tm * tm_p = &tm;
-  BOOL mod_tz;
+  BOOL mod_tz = TRUE;
   uschar * tz = to_tz(US"GMT0");    /* need to call strptime with baseline TZ */
 
   /* Parse OpenSSL ASN1_TIME_print output.  A shame there seems to
@@ -132,7 +150,7 @@ else
   /*XXX %Z might be glibc-specific?  Solaris has it, at least*/
   /*XXX should we switch to POSIX locale for this? */
   tm.tm_isdst = 0;
-  if (!strptime(CCS s, "%b %e %T %Y %Z", &tm))
+  if (!len || !strptime(CCS s, "%b %e %T %Y %Z", &tm))
     expand_string_message = US"failed time conversion";
 
   else
@@ -140,11 +158,11 @@ else
     time_t t = mktime(&tm);	/* make the tm self-consistent */
 
     if (mod && Ustrcmp(mod, "int") == 0)	/* seconds since epoch */
-      s = string_sprintf("%u", t);
+      s = string_sprintf(TIME_T_FMT, t);
 
     else
       {
-      if (!timestamps_utc)	/* decoded string in local TZ */
+      if (!f.timestamps_utc)	/* decoded string in local TZ */
 	{				/* shift to local TZ */
 	restore_tz(tz);
 	mod_tz = FALSE;
@@ -159,7 +177,7 @@ else
       }
     }
 
-  if (mod_tz);
+  if (mod_tz)
     restore_tz(tz);
   }
 BIO_free(bp);
@@ -236,9 +254,9 @@ BIO * bp = BIO_new(BIO_s_mem());
 if (!bp) return badalloc();
 
 if (X509_print_ex(bp, (X509 *)cert, 0,
-  X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION | X509_FLAG_NO_SERIAL | 
-  X509_FLAG_NO_SIGNAME | X509_FLAG_NO_ISSUER | X509_FLAG_NO_VALIDITY | 
-  X509_FLAG_NO_SUBJECT | X509_FLAG_NO_PUBKEY | X509_FLAG_NO_EXTENSIONS | 
+  X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION | X509_FLAG_NO_SERIAL |
+  X509_FLAG_NO_SIGNAME | X509_FLAG_NO_ISSUER | X509_FLAG_NO_VALIDITY |
+  X509_FLAG_NO_SUBJECT | X509_FLAG_NO_PUBKEY | X509_FLAG_NO_EXTENSIONS |
   /* X509_FLAG_NO_SIGDUMP is the missing one */
   X509_FLAG_NO_AUX) == 1)
   {
@@ -262,10 +280,10 @@ BIO * bp = BIO_new(BIO_s_mem());
 if (!bp) return badalloc();
 
 if (X509_print_ex(bp, (X509 *)cert, 0,
-  X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION | X509_FLAG_NO_SERIAL | 
+  X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION | X509_FLAG_NO_SERIAL |
   /* X509_FLAG_NO_SIGNAME is the missing one */
-  X509_FLAG_NO_ISSUER | X509_FLAG_NO_VALIDITY | 
-  X509_FLAG_NO_SUBJECT | X509_FLAG_NO_PUBKEY | X509_FLAG_NO_EXTENSIONS | 
+  X509_FLAG_NO_ISSUER | X509_FLAG_NO_VALIDITY |
+  X509_FLAG_NO_SUBJECT | X509_FLAG_NO_PUBKEY | X509_FLAG_NO_EXTENSIONS |
   X509_FLAG_NO_SIGDUMP | X509_FLAG_NO_AUX) == 1)
   {
   long len = BIO_get_mem_data(bp, &cp);
@@ -291,7 +309,7 @@ return mod ? tls_field_from_dn(cp, mod) : cp;
 uschar *
 tls_cert_version(void * cert, uschar * mod)
 {
-return string_sprintf("%d", X509_get_version((X509 *)cert));
+return string_sprintf("%ld", X509_get_version((X509 *)cert));
 }
 
 uschar *
@@ -309,17 +327,20 @@ uschar * cp3;
 
 if (!bp) return badalloc();
 
+#ifdef EXIM_HAVE_ASN1_MACROS
+ASN1_STRING_print(bp, adata);
+#else
 M_ASN1_OCTET_STRING_print(bp, adata);
-/* binary data, DER encoded */
+#endif
 
+/* binary data, DER encoded */
 /* just dump for now */
 len = BIO_get_mem_data(bp, &cp1);
 cp3 = cp2 = store_get(len*3+1);
 
 while(len)
   {
-  sprintf(CS cp2, "%.2x ", *cp1++);
-  cp2 += 3;
+  cp2 += sprintf(CS cp2, "%.2x ", *cp1++);
   len--;
   }
 cp2[-1] = '\0';
@@ -330,7 +351,7 @@ return cp3;
 uschar *
 tls_cert_subject_altname(void * cert, uschar * mod)
 {
-uschar * list = NULL;
+gstring * list = NULL;
 STACK_OF(GENERAL_NAME) * san = (STACK_OF(GENERAL_NAME) *)
   X509_get_ext_d2i((X509 *)cert, NID_subject_alt_name, NULL, NULL);
 uschar osep = '\n';
@@ -361,17 +382,17 @@ while (sk_GENERAL_NAME_num(san) > 0)
     {
     case GEN_DNS:
       tag = US"DNS";
-      ele = ASN1_STRING_data(namePart->d.dNSName);
+      ele = US ASN1_STRING_get0_data(namePart->d.dNSName);
       len = ASN1_STRING_length(namePart->d.dNSName);
       break;
     case GEN_URI:
       tag = US"URI";
-      ele = ASN1_STRING_data(namePart->d.uniformResourceIdentifier);
+      ele = US ASN1_STRING_get0_data(namePart->d.uniformResourceIdentifier);
       len = ASN1_STRING_length(namePart->d.uniformResourceIdentifier);
       break;
     case GEN_EMAIL:
       tag = US"MAIL";
-      ele = ASN1_STRING_data(namePart->d.rfc822Name);
+      ele = US ASN1_STRING_get0_data(namePart->d.rfc822Name);
       len = ASN1_STRING_length(namePart->d.rfc822Name);
       break;
     default:
@@ -386,7 +407,7 @@ while (sk_GENERAL_NAME_num(san) > 0)
   }
 
 sk_GENERAL_NAME_free(san);
-return list;
+return string_from_gstring(list);
 }
 
 uschar *
@@ -395,26 +416,23 @@ tls_cert_ocsp_uri(void * cert, uschar * mod)
 STACK_OF(ACCESS_DESCRIPTION) * ads = (STACK_OF(ACCESS_DESCRIPTION) *)
   X509_get_ext_d2i((X509 *)cert, NID_info_access, NULL, NULL);
 int adsnum = sk_ACCESS_DESCRIPTION_num(ads);
-int i;
 uschar sep = '\n';
-uschar * list = NULL;
+gstring * list = NULL;
 
 if (mod)
   if (*mod == '>' && *++mod) sep = *mod++;
 
-for (i = 0; i < adsnum; i++)
+for (int i = 0; i < adsnum; i++)
   {
   ACCESS_DESCRIPTION * ad = sk_ACCESS_DESCRIPTION_value(ads, i);
 
   if (ad && OBJ_obj2nid(ad->method) == NID_ad_OCSP)
-    {
-    uschar * ele = ASN1_STRING_data(ad->location->d.ia5);
-    int len =  ASN1_STRING_length(ad->location->d.ia5);
-    list = string_append_listele_n(list, sep, ele, len);
-    }
+    list = string_append_listele_n(list, sep,
+      US ASN1_STRING_get0_data(ad->location->d.ia5),
+      ASN1_STRING_length(ad->location->d.ia5));
   }
 sk_ACCESS_DESCRIPTION_free(ads);
-return list;
+return string_from_gstring(list);
 }
 
 uschar *
@@ -424,34 +442,28 @@ STACK_OF(DIST_POINT) * dps = (STACK_OF(DIST_POINT) *)
   X509_get_ext_d2i((X509 *)cert,  NID_crl_distribution_points,
     NULL, NULL);
 DIST_POINT * dp;
-int dpsnum = sk_DIST_POINT_num(dps);
-int i;
 uschar sep = '\n';
-uschar * list = NULL;
+gstring * list = NULL;
 
 if (mod)
   if (*mod == '>' && *++mod) sep = *mod++;
 
-if (dps) for (i = 0; i < dpsnum; i++)
+if (dps) for (int i = 0, dpsnum = sk_DIST_POINT_num(dps); i < dpsnum; i++)
   if ((dp = sk_DIST_POINT_value(dps, i)))
     {
     STACK_OF(GENERAL_NAME) * names = dp->distpoint->name.fullname;
     GENERAL_NAME * np;
-    int nnum = sk_GENERAL_NAME_num(names);
-    int j;
 
-    for (j = 0; j < nnum; j++)
+    for (int j = 0, nnum = sk_GENERAL_NAME_num(names); j < nnum; j++)
       if (  (np = sk_GENERAL_NAME_value(names, j))
 	 && np->type == GEN_URI
 	 )
-	{
-	uschar * ele = ASN1_STRING_data(np->d.uniformResourceIdentifier);
-	int len =  ASN1_STRING_length(np->d.uniformResourceIdentifier);
-	list = string_append_listele_n(list, sep, ele, len);
-	}
+	list = string_append_listele_n(list, sep,
+	  US ASN1_STRING_get0_data(np->d.uniformResourceIdentifier),
+	  ASN1_STRING_length(np->d.uniformResourceIdentifier));
     }
 sk_DIST_POINT_free(dps);
-return list;
+return string_from_gstring(list);
 }
 
 
@@ -459,10 +471,29 @@ return list;
 /*****************************************************
 *  Certificate operator routines
 *****************************************************/
+uschar *
+tls_cert_der_b64(void * cert)
+{
+BIO * bp = BIO_new(BIO_s_mem());
+uschar * cp = NULL;
+
+if (!i2d_X509_bio(bp, (X509 *)cert))
+  log_write(0, LOG_MAIN, "TLS error in certificate export: %s",
+    ERR_error_string(ERR_get_error(), NULL));
+else
+  {
+  long len = BIO_get_mem_data(bp, &cp);
+  cp = b64encode(CUS cp, (int)len);
+  }
+
+BIO_free(bp);
+return cp;
+}
+
+
 static uschar *
 fingerprint(X509 * cert, const EVP_MD * fdig)
 {
-int j;
 unsigned int n;
 uschar md[EVP_MAX_MD_SIZE];
 uschar * cp;
@@ -473,23 +504,23 @@ if (!X509_digest(cert,fdig,md,&n))
   return NULL;
   }
 cp = store_get(n*2+1);
-for (j = 0; j < (int)n; j++) sprintf(CS cp+2*j, "%02X", md[j]);
+for (int j = 0; j < (int)n; j++) sprintf(CS cp+2*j, "%02X", md[j]);
 return(cp);
 }
 
-uschar * 
+uschar *
 tls_cert_fprt_md5(void * cert)
 {
 return fingerprint((X509 *)cert, EVP_md5());
 }
 
-uschar * 
+uschar *
 tls_cert_fprt_sha1(void * cert)
 {
 return fingerprint((X509 *)cert, EVP_sha1());
 }
 
-uschar * 
+uschar *
 tls_cert_fprt_sha256(void * cert)
 {
 return fingerprint((X509 *)cert, EVP_sha256());