botan: Adhere to configured DH exponent length

diff --git a/src/libstrongswan/plugins/botan/botan_diffie_hellman.c b/src/libstrongswan/plugins/botan/botan_diffie_hellman.c
index 422b4aea14666945ddeaf8c00b009298d35bae9c..008e15fbde6c06c4caec74ce65b87e2ac7974c13 100644 (file)
--- a/src/libstrongswan/plugins/botan/botan_diffie_hellman.c
+++ b/src/libstrongswan/plugins/botan/botan_diffie_hellman.c
@@ -223,7 +223,7 @@ static botan_diffie_hellman_t *create_generic(diffie_hellman_group_t group,
        }
 
        rng = lib->crypto->create_rng(lib->crypto, RNG_STRONG);
-       if (!rng || !rng->allocate_bytes(rng, p.len, &random))
+       if (!rng || !rng->allocate_bytes(rng, exp_len, &random))
        {
                DESTROY_IF(rng);
                destroy(this);
@@ -253,7 +253,7 @@ botan_diffie_hellman_t *botan_diffie_hellman_create(
        if (group == MODP_CUSTOM)
        {
                VA_ARGS_GET(group, g, p);
-               return create_generic(group, g, p);
+               return create_generic(group, g, p, p.len);
        }
 
        params = diffie_hellman_get_params(group);
@@ -261,7 +261,8 @@ botan_diffie_hellman_t *botan_diffie_hellman_create(
        {
                return NULL;
        }
-       return create_generic(group, params->generator, params->prime);
+       return create_generic(group, params->generator, params->prime,
+                                                 params->exp_len);
 }
 
 #endif