pki_gcrypt: Generalize asn1_get_int

* src/pki_gcrypt.c (asn1_get): Generalize from 'asn1_get_int'.
(asn1_get_int): New function simply calling 'asn1_get'.

Signed-off-by: Justus Winter <justus@g10code.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

src/pki_gcrypt.c

@@ -112,12 +112,12 @@ static uint32_t asn1_get_len(ssh_buffer buffer) {
   return len;
 }
 
-static ssh_string asn1_get_int(ssh_buffer buffer) {
+static ssh_string asn1_get(ssh_buffer buffer, unsigned char want) {
   ssh_string str;
   unsigned char type;
   uint32_t size;
 
-  if (ssh_buffer_get_data(buffer, &type, 1) == 0 || type != ASN1_INTEGER) {
+  if (ssh_buffer_get_data(buffer, &type, 1) == 0 || type != want) {
     return NULL;
   }
   size = asn1_get_len(buffer);
@@ -138,6 +138,10 @@ static ssh_string asn1_get_int(ssh_buffer buffer) {
   return str;
 }
 
+static ssh_string asn1_get_int(ssh_buffer buffer) {
+  return asn1_get(buffer, ASN1_INTEGER);
+}
+
 static int asn1_check_sequence(ssh_buffer buffer) {
   unsigned char *j = NULL;
   unsigned char tmp;