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all hashes, hmacs and prfs use libstrongswan

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This commit is contained in:
Andreas Steffen
2009-05-06 20:05:22 +02:00
parent e382d96f62
commit ab87051f23
4 changed files with 271 additions and 243 deletions
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src/pluto/modecfg.c
+18 -10
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@@ -24,7 +24,9 @@
#include <string.h>
#include <freeswan.h>
#include <library.h>
#include <crypto/prfs/prf.h>
#include "constants.h"
#include "defs.h"
@@ -241,22 +243,28 @@ set_internal_addr(struct connection *c, internal_addr_t *ia)
/*
* Compute HASH of Mode Config.
*/
static size_t
modecfg_hash(u_char *dest, const u_char *start, const u_char *roof
, const struct state *st)
static size_t modecfg_hash(u_char *dest, u_char *start, u_char *roof,
const struct state *st)
{
struct hmac_ctx ctx;
chunk_t msgid_chunk = chunk_from_thing(st->st_msgid);
chunk_t msg_chunk = { start, roof - start };
size_t prf_block_size;
pseudo_random_function_t prf_alg;
prf_t *prf;
hmac_init_chunk(&ctx, st->st_oakley.hasher, st->st_skeyid_a);
hmac_update(&ctx, (const u_char *) &st->st_msgid, sizeof(st->st_msgid));
hmac_update(&ctx, start, roof-start);
hmac_final(dest, &ctx);
prf_alg = oakley_to_prf(st->st_oakley.hasher->algo_id);
prf = lib->crypto->create_prf(lib->crypto, prf_alg);
prf->set_key(prf, st->st_skeyid_a);
prf->get_bytes(prf, msgid_chunk, NULL);
prf->get_bytes(prf, msg_chunk, dest);
prf_block_size = prf->get_block_size(prf);
prf->destroy(prf);
DBG(DBG_CRYPT,
DBG_log("ModeCfg HASH computed:");
DBG_dump("", dest, ctx.hmac_digest_size)
DBG_dump("", dest, prf_block_size)
)
return ctx.hmac_digest_size;
return prf_block_size;
}