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botan: Adhere to configured DH exponent length

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This commit is contained in:
Tobias Brunner
2018-09-12 16:25:00 +02:00
parent bd267c863f
commit 304d4ca57a
1 changed files with 4 additions and 3 deletions
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src/libstrongswan/plugins/botan/botan_diffie_hellman.c
+4 -3
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@@ -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); 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_IF(rng);
destroy(this); destroy(this);
@@ -253,7 +253,7 @@ botan_diffie_hellman_t *botan_diffie_hellman_create(
if (group == MODP_CUSTOM) if (group == MODP_CUSTOM)
{ {
VA_ARGS_GET(group, g, p); 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); params = diffie_hellman_get_params(group);
@@ -261,7 +261,8 @@ botan_diffie_hellman_t *botan_diffie_hellman_create(
{ {
return NULL; return NULL;
} }
return create_generic(group, params->generator, params->prime); return create_generic(group, params->generator, params->prime,
params->exp_len);
} }
#endif #endif