Add functions for TLS signature algorithm.

Add functions to convert TLS signature algorithm from/to constants
defined by GnuTLS.

Signed-off-by: Simon Josefsson <simon@josefsson.org>

3 files changed, 70 insertions, 11 deletions

diff --git a/lib/gnutls_algorithms.c b/lib/gnutls_algorithms.c
index 08054c4617..73179bbc25 100644
--- a/lib/gnutls_algorithms.c
+++ b/lib/gnutls_algorithms.c
@@ -1787,29 +1787,32 @@ struct gnutls_sign_entry
   gnutls_sign_algorithm_t id;
   gnutls_pk_algorithm_t pk;
   gnutls_mac_algorithm_t mac;
+  sign_algorithm_st aid;
 };
 typedef struct gnutls_sign_entry gnutls_sign_entry;
 
+#define TLS_SIGN_AID_UNKNOWN {255, 255}
+
 static const gnutls_sign_entry sign_algorithms[] = {
   {"RSA-SHA", SIG_RSA_SHA1_OID, GNUTLS_SIGN_RSA_SHA1, GNUTLS_PK_RSA,
-   GNUTLS_MAC_SHA1},
+   GNUTLS_MAC_SHA1, {2, 1}},
   {"RSA-SHA256", SIG_RSA_SHA256_OID, GNUTLS_SIGN_RSA_SHA256, GNUTLS_PK_RSA,
-   GNUTLS_MAC_SHA256},
+   GNUTLS_MAC_SHA256, {4, 1}},
   {"RSA-SHA384", SIG_RSA_SHA384_OID, GNUTLS_SIGN_RSA_SHA384, GNUTLS_PK_RSA,
-   GNUTLS_MAC_SHA384},
+   GNUTLS_MAC_SHA384, {5, 1}},
   {"RSA-SHA512", SIG_RSA_SHA512_OID, GNUTLS_SIGN_RSA_SHA512, GNUTLS_PK_RSA,
-   GNUTLS_MAC_SHA512},
+   GNUTLS_MAC_SHA512, {6, 1}},
   {"RSA-RMD160", SIG_RSA_RMD160_OID, GNUTLS_SIGN_RSA_RMD160, GNUTLS_PK_RSA,
-   GNUTLS_MAC_RMD160},
+   GNUTLS_MAC_RMD160, TLS_SIGN_AID_UNKNOWN},
   {"DSA-SHA", SIG_DSA_SHA1_OID, GNUTLS_SIGN_DSA_SHA1, GNUTLS_PK_DSA,
-   GNUTLS_MAC_SHA1},
+   GNUTLS_MAC_SHA1, {2, 2}},
   {"RSA-MD5", SIG_RSA_MD5_OID, GNUTLS_SIGN_RSA_MD5, GNUTLS_PK_RSA,
-   GNUTLS_MAC_MD5},
+   GNUTLS_MAC_MD5, {1, 1}},
   {"RSA-MD2", SIG_RSA_MD2_OID, GNUTLS_SIGN_RSA_MD2, GNUTLS_PK_RSA,
-   GNUTLS_MAC_MD2},
-  {"GOST R 34.10-2001", SIG_GOST_R3410_2001_OID, 0, 0, 0},
-  {"GOST R 34.10-94", SIG_GOST_R3410_94_OID, 0, 0, 0},
-  {0, 0, 0, 0, 0}
+   GNUTLS_MAC_MD2, TLS_SIGN_AID_UNKNOWN},
+  {"GOST R 34.10-2001", SIG_GOST_R3410_2001_OID, 0, 0, 0, TLS_SIGN_AID_UNKNOWN},
+  {"GOST R 34.10-94", SIG_GOST_R3410_94_OID, 0, 0, 0, TLS_SIGN_AID_UNKNOWN},
+  {0, 0, 0, 0, 0, TLS_SIGN_AID_UNKNOWN}
 };
 
 /* Keep the contents of this struct the same as the previous one. */
@@ -1958,6 +1961,52 @@ _gnutls_x509_sign_to_oid (gnutls_pk_algorithm_t pk,
   return ret;
 }
 
+gnutls_mac_algorithm_t
+_gnutls_sign_get_mac_algorithm (gnutls_sign_algorithm_t sign)
+{
+  gnutls_mac_algorithm_t ret = GNUTLS_MAC_UNKNOWN;
+
+  GNUTLS_SIGN_ALG_LOOP (ret = p->mac);
+
+  return ret;
+}
+
+gnutls_pk_algorithm_t
+_gnutls_sign_get_pk_algorithm (gnutls_sign_algorithm_t sign)
+{
+  gnutls_pk_algorithm_t ret = GNUTLS_PK_UNKNOWN;
+
+  GNUTLS_SIGN_ALG_LOOP (ret = p->pk);
+
+  return ret;
+}
+
+gnutls_sign_algorithm_t
+_gnutls_tls_aid_to_sign (sign_algorithm_st aid)
+{
+  gnutls_sign_algorithm_t ret = GNUTLS_SIGN_UNKNOWN;
+
+  GNUTLS_SIGN_LOOP ( if (p->aid.hash_algorithm == aid.hash_algorithm
+			 && p->aid.sign_algorithm == aid.sign_algorithm)
+		       {
+			 ret = p->id;
+			 break;
+		       } );
+
+  return ret;
+}
+
+sign_algorithm_st
+_gnutls_sign_to_tls_aid (gnutls_sign_algorithm_t sign)
+{
+  sign_algorithm_st ret = TLS_SIGN_AID_UNKNOWN;
+
+  GNUTLS_SIGN_ALG_LOOP (ret = p->aid);
+
+  return ret;
+}
+
+
 
 /* pk algorithms;
  */
diff --git a/lib/gnutls_algorithms.h b/lib/gnutls_algorithms.h
index 0e2f2b7fcd..0a2faac52f 100644
--- a/lib/gnutls_algorithms.h
+++ b/lib/gnutls_algorithms.h
@@ -105,6 +105,10 @@ gnutls_sign_algorithm_t _gnutls_x509_pk_to_sign (gnutls_pk_algorithm_t pk,
 						 gnutls_mac_algorithm_t mac);
 const char *_gnutls_x509_sign_to_oid (gnutls_pk_algorithm_t,
 				      gnutls_mac_algorithm_t mac);
+gnutls_sign_algorithm_t _gnutls_tls_aid_to_sign (sign_algorithm_st aid);
+sign_algorithm_st _gnutls_sign_to_tls_aid (gnutls_sign_algorithm_t sign);
+gnutls_mac_algorithm_t _gnutls_sign_get_mac_algorithm (gnutls_sign_algorithm_t);
+gnutls_pk_algorithm_t _gnutls_sign_get_pk_algorithm (gnutls_sign_algorithm_t);
 
 int _gnutls_mac_priority (gnutls_session_t session,
 			  gnutls_mac_algorithm_t algorithm);
diff --git a/lib/gnutls_int.h b/lib/gnutls_int.h
index 9af17b03ba..100ad37487 100644
--- a/lib/gnutls_int.h
+++ b/lib/gnutls_int.h
@@ -273,6 +273,12 @@ typedef struct
   uint8_t suite[2];
 } cipher_suite_st;
 
+typedef struct
+{
+  uint8_t hash_algorithm;
+  uint8_t sign_algorithm;
+} sign_algorithm_st;
+
 /* This structure holds parameters got from TLS extension
  * mechanism. (some extensions may hold parameters in auth_info_t
  * structures also - see SRP).