g10: Fix symmetric cipher algo constant for ECDH.

* g10/ecdh.c (kek_params_table): Use CIPHER_ALGO_AES192 for
ECC strength 384, according to RFC-6637.

--

Reported-by: Trevor Bentley
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

g10/ecdh.c

@@ -39,7 +39,7 @@ static const struct
   /* Note: Must be sorted by ascending values for QBITS.  */
   {
     { 256, DIGEST_ALGO_SHA256, CIPHER_ALGO_AES    },
-    { 384, DIGEST_ALGO_SHA384, CIPHER_ALGO_AES256 },
+    { 384, DIGEST_ALGO_SHA384, CIPHER_ALGO_AES192 },
 
     /* Note: 528 is 521 rounded to the 8 bit boundary */
     { 528, DIGEST_ALGO_SHA512, CIPHER_ALGO_AES256 }

scd/app-openpgp.c

@@ -1448,8 +1448,8 @@ ecdh_params (const char *curve)
   /* See RFC-6637 for those constants.
          0x03: Number of bytes
          0x01: Version for this parameter format
-         KDF algo
-        KEK algo
+         KDF hash algo
+         KEK symmetric cipher algo
   */
   if (nbits <= 256)
     return (const unsigned char*)"\x03\x01\x08\x07";