Add YKPIV_ALGO_TAG

Replace the magic constant 0x80 when sending a packet to the key

lib/ykpiv.h

@@ -110,6 +110,7 @@ extern "C"
                                     const unsigned char *ec_data, unsigned char ec_data_len,
                                     const unsigned char pin_policy, const unsigned char touch_policy);
 
+#define YKPIV_ALGO_TAG 0x80
 #define YKPIV_ALGO_3DES 0x03
 #define YKPIV_ALGO_RSA1024 0x06
 #define YKPIV_ALGO_RSA2048 0x07

tool/yubico-piv-tool.c

@@ -145,7 +145,7 @@ static bool generate_key(ykpiv_state *state, const char *slot,
 
   *in_ptr++ = 0xac;
   *in_ptr++ = 3;
-  *in_ptr++ = 0x80;
+  *in_ptr++ = YKPIV_ALGO_TAG;
   *in_ptr++ = 1;
   *in_ptr++ = get_piv_algorithm(algorithm);
   if(in_data[4] == 0) {

ykcs11/token_vendors.c

@@ -67,7 +67,7 @@ static CK_RV COMMON_token_generate_key(ykpiv_state *state, CK_BBOOL rsa,
 
   *in_ptr++ = 0xac;
   *in_ptr++ = 3;
-  *in_ptr++ = 0x80;
+  *in_ptr++ = YKPIV_ALGO_TAG;
   *in_ptr++ = 1;
 
   switch(key_len) {