public-key: Add helper to determine key type from signature scheme

diff --git a/src/libstrongswan/credentials/keys/public_key.c b/src/libstrongswan/credentials/keys/public_key.c
index c342ac128a9957b4020e9045b024e5b76f5f4640..54ab15baea51ed132b0221a9c89e6f7e8d5b1e82 100644 (file)
--- a/src/libstrongswan/credentials/keys/public_key.c
+++ b/src/libstrongswan/credentials/keys/public_key.c
@@ -1,4 +1,5 @@
 /*
+ * Copyright (C) 2015 Tobias Brunner
  * Copyright (C) 2007 Martin Willi
  * Copyright (C) 2014 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
@@ -147,3 +148,36 @@ signature_scheme_t signature_scheme_from_oid(int oid)
        }
 }
 
+/*
+ * Defined in header.
+ */
+key_type_t key_type_from_signature_scheme(signature_scheme_t scheme)
+{
+       switch (scheme)
+       {
+               case SIGN_UNKNOWN:
+                       break;
+               case SIGN_RSA_EMSA_PKCS1_NULL:
+               case SIGN_RSA_EMSA_PKCS1_MD5:
+               case SIGN_RSA_EMSA_PKCS1_SHA1:
+               case SIGN_RSA_EMSA_PKCS1_SHA224:
+               case SIGN_RSA_EMSA_PKCS1_SHA256:
+               case SIGN_RSA_EMSA_PKCS1_SHA384:
+               case SIGN_RSA_EMSA_PKCS1_SHA512:
+                       return KEY_RSA;
+               case SIGN_ECDSA_WITH_SHA1_DER:
+               case SIGN_ECDSA_WITH_SHA256_DER:
+               case SIGN_ECDSA_WITH_SHA384_DER:
+               case SIGN_ECDSA_WITH_SHA512_DER:
+               case SIGN_ECDSA_WITH_NULL:
+               case SIGN_ECDSA_256:
+               case SIGN_ECDSA_384:
+               case SIGN_ECDSA_521:
+                       return KEY_ECDSA;
+               case SIGN_BLISS_WITH_SHA256:
+               case SIGN_BLISS_WITH_SHA384:
+               case SIGN_BLISS_WITH_SHA512:
+                       return KEY_BLISS;
+       }
+       return KEY_ANY;
+}

diff --git a/src/libstrongswan/credentials/keys/public_key.h b/src/libstrongswan/credentials/keys/public_key.h
index 9cdcc8e6c9a33d715d4aae6e546e677a02904c46..f4ec09b7ef43d686c993708607b4d2fb551a98a4 100644 (file)
--- a/src/libstrongswan/credentials/keys/public_key.h
+++ b/src/libstrongswan/credentials/keys/public_key.h
@@ -1,4 +1,5 @@
 /*
+ * Copyright (C) 2015 Tobias Brunner
  * Copyright (C) 2007 Martin Willi
  * Copyright (C) 2014 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
@@ -247,4 +248,12 @@ bool public_key_has_fingerprint(public_key_t *public, chunk_t fingerprint);
  */
 signature_scheme_t signature_scheme_from_oid(int oid);
 
+/**
+ * Determine the type of key associated with a given signature scheme.
+ *
+ * @param scheme               signature scheme
+ * @return                             key type (could be KEY_ANY)
+ */
+key_type_t key_type_from_signature_scheme(signature_scheme_t scheme);
+
 #endif /** PUBLIC_KEY_H_ @}*/