set5: completed task39

1 files changed, 66 insertions, 0 deletions

diff --git a/lib/lib5.h b/lib/lib5.h
new file mode 100644
index 0000000..dbfd901
--- /dev/null
+++ b/lib/lib5.h
@@ -0,0 +1,66 @@
+#ifndef __LIB_5__
+#define __LIB_5__
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <gmp.h>
+#include <openssl/bn.h>
+
+struct dh_param {
+	mpz_t A;
+	mpz_t B;
+	unsigned char *a;
+	unsigned char *b;
+	unsigned char *p;
+	unsigned char *g;
+	mpz_t s1;
+	mpz_t s2;
+};
+
+// global openssl context for auxaliry results
+BN_CTX *ctx;
+
+struct extended_euclid {
+	int d;
+	int s;
+	int t;
+};
+
+struct extended_euclid_bignum {
+	BIGNUM *d;
+	BIGNUM *s;
+	BIGNUM *t;
+};
+
+struct rsa_key {
+	int exponent;
+	int modulo;
+};
+
+struct rsa_key_bignum {
+	BIGNUM *exponent;
+	BIGNUM *modulo;
+};
+
+void mod_bignums(unsigned char *number, unsigned char *mod, unsigned int base, unsigned char **erg);
+void modexp_bignums(unsigned char *base, unsigned char *exp, unsigned char *mod, int string_base,
+		mpz_t *erg_mp);
+void modexp_mpz(mpz_t *base_mp, unsigned char *exp, unsigned char *mod, int string_base,
+		mpz_t *erg_mp);
+void dh_init(struct dh_param *dh);
+void dh_generate_secret_keys(struct dh_param *dh);
+void dh_generate_public_keys(struct dh_param *dh);
+void dh_get_session_key(struct dh_param *dh);
+void do_dh_key_exchange(struct dh_param *dh);
+void sha1_key_from_dh(struct dh_param *dh, unsigned char *key);
+void dh_mitm(struct dh_param *dh);
+int rsa_decrypt_bignum(BIGNUM *message, BIGNUM *res, struct rsa_key_bignum *private);
+int rsa_encrypt_bignum(BIGNUM *message, BIGNUM *res, struct rsa_key_bignum *public);
+void die(char *message);
+int rsa_decrpyt(int message, struct rsa_key *private);
+int rsa_encrypt(int message, struct rsa_key *public);
+int modulo(int a, int b);
+void extended_euclid_algo(int a, int b, struct extended_euclid *e);
+int rsa_generate_key_bignum(struct rsa_key_bignum *public, struct rsa_key_bignum *private);
+int free_rsa_key_bignum(struct rsa_key_bignum *t);
+#endif