Add the brainpoolp512r1 curve and use it.

[tinc] / src / openssl / crypto.c

diff --git a/src/openssl/crypto.c b/src/openssl/crypto.c
index 835e808..e07c818 100644 (file)
--- a/src/openssl/crypto.c
+++ b/src/openssl/crypto.c
@@ -1,6 +1,6 @@
 /*
     crypto.c -- Cryptographic miscellaneous functions and initialisation
-    Copyright (C) 2007 Guus Sliepen <guus@tinc-vpn.org>
+    Copyright (C) 2007-2013 Guus Sliepen <guus@tinc-vpn.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -17,24 +17,89 @@
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#include "system.h"
+#include "../system.h"
 
 #include <openssl/rand.h>
 #include <openssl/evp.h>
 #include <openssl/engine.h>
 
-#include "crypto.h"
+#include "../crypto.h"
 
-void crypto_init() {
-        RAND_load_file("/dev/urandom", 1024);
+#include "brainpool.h"
 
-        ENGINE_load_builtin_engines();
-        ENGINE_register_all_complete();
+EC_GROUP *brainpoolp512r1;
 
-        OpenSSL_add_all_algorithms();
+static void generate_brainpool_curve() {
+       static const char *p = "AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA703308717D4D9B009BC66842AECDA12AE6A380E62881FF2F2D82C68528AA6056583A48F3";
+       static const char *A = "7830A3318B603B89E2327145AC234CC594CBDD8D3DF91610A83441CAEA9863BC2DED5D5AA8253AA10A2EF1C98B9AC8B57F1117A72BF2C7B9E7C1AC4D77FC94CA";
+       static const char *B = "3DF91610A83441CAEA9863BC2DED5D5AA8253AA10A2EF1C98B9AC8B57F1117A72BF2C7B9E7C1AC4D77FC94CADC083E67984050B75EBAE5DD2809BD638016F723";
+       static const char *x = "81AEE4BDD82ED9645A21322E9C4C6A9385ED9F70B5D916C1B43B62EEF4D0098EFF3B1F78E2D0D48D50D1687B93B97D5F7C6D5047406A5E688B352209BCB9F822";
+       static const char *y = "7DDE385D566332ECC0EABFA9CF7822FDF209F70024A57B1AA000C55B881F8111B2DCDE494A5F485E5BCA4BD88A2763AED1CA2B2FA8F0540678CD1E0F3AD80892";
+       static const char *q = "AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA70330870553E5C414CA92619418661197FAC10471DB1D381085DDADDB58796829CA90069";
+
+       BIGNUM *bn_p = NULL;
+       BIGNUM *bn_A = NULL;
+       BIGNUM *bn_B = NULL;
+       BIGNUM *bn_x = NULL;
+       BIGNUM *bn_y = NULL;
+       BIGNUM *bn_q = NULL;
+
+       BN_hex2bn(&bn_p, p);
+       BN_hex2bn(&bn_A, A);
+       BN_hex2bn(&bn_B, B);
+       BN_hex2bn(&bn_x, x);
+       BN_hex2bn(&bn_y, y);
+       BN_hex2bn(&bn_q, q);
+
+       BN_CTX *ctx = BN_CTX_new();
+
+       if(!bn_p || !bn_A || !bn_B || !bn_x || !bn_y || !bn_q || !ctx)
+               abort();
+
+       brainpoolp512r1 = EC_GROUP_new_curve_GFp(bn_p, bn_A, bn_B, ctx);
+
+       if(!brainpoolp512r1)
+               abort();
+
+       EC_POINT *generator = EC_POINT_new(brainpoolp512r1);
+
+       if(!generator)
+               abort();
+
+       if(EC_POINT_set_affine_coordinates_GFp(brainpoolp512r1, generator, bn_x, bn_y, ctx) != 1)
+               abort();
+
+       if(EC_GROUP_set_generator(brainpoolp512r1, generator, bn_q, NULL) != 1)
+               abort();
+
+       EC_POINT_free(generator);
+       BN_CTX_free(ctx);
+       BN_free(bn_p);
+       BN_free(bn_A);
+       BN_free(bn_B);
+       BN_free(bn_x);
+       BN_free(bn_y);
+       BN_free(bn_q);
+}
+
+void crypto_init(void) {
+       RAND_load_file("/dev/urandom", 1024);
+
+       ENGINE_load_builtin_engines();
+       ENGINE_register_all_complete();
+
+       ERR_load_crypto_strings();
+       OpenSSL_add_all_algorithms();
+
+       if(!RAND_status()) {
+               fprintf(stderr, "Not enough entropy for the PRNG!\n");
+               abort();
+       }
+
+       generate_brainpool_curve();
 }
 
-void crypto_exit() {
+void crypto_exit(void) {
        EVP_cleanup();
 }