added rsa-gen mode

src/cryptography/RSA.c

@@ -11,20 +11,16 @@ Result(void) RSA_generateKeyPair(u32 key_size,
     br_rsa_private_key* sk, br_rsa_public_key* pk,
     const br_prng_class** rng_vtable_ptr)
 {
-    Deferral(16);
+    Deferral(8);
     bool success = false;
-    rng_init_sha256_seedFromTime(rng_vtable_ptr);
     
     void* sk_buf = malloc(BR_RSA_KBUF_PRIV_SIZE(key_size));
-    Defer(
-        if(!success)
-            free(sk_buf)
-    );
-    
     void* pk_buf = malloc(BR_RSA_KBUF_PUB_SIZE(key_size));
     Defer(
-        if(!success)
-            free(pk_buf)
+        if(!success){
+            free(sk_buf);
+            free(pk_buf);
+        }
     );
     
     success = br_rsa_i31_keygen(rng_vtable_ptr, sk, sk_buf, pk, pk_buf, key_size, DEFAULT_PUBLIC_EXPONENT);
@@ -35,8 +31,28 @@ Result(void) RSA_generateKeyPair(u32 key_size,
     Return RESULT_VOID;
 }
 
+Result(void) RSA_generateKeyPairFromTime(u32 key_size, 
+    br_rsa_private_key* sk, br_rsa_public_key* pk)
+{
+    Deferral(8);
+    br_hmac_drbg_context time_based_rng = { .vtable = &br_hmac_drbg_vtable };
+    rng_init_sha256_seedFromTime(&time_based_rng.vtable);
+    try_void(RSA_generateKeyPair(key_size, sk, pk, &time_based_rng.vtable));
+    Return RESULT_VOID;
+}
+
+Result(void) RSA_generateKeyPairFromPassword(u32 key_size, 
+    br_rsa_private_key* sk, br_rsa_public_key* pk, str password)
+{
+    Deferral(8);
+    br_hmac_drbg_context password_based_rng = { .vtable = &br_hmac_drbg_vtable };
+    br_hmac_drbg_init(&password_based_rng, &br_sha256_vtable, password.data, password.size);
+    try_void(RSA_generateKeyPair(key_size, sk, pk, &password_based_rng.vtable));
+    Return RESULT_VOID;
+}
+
 Result(void) RSA_computePublicKey(const br_rsa_private_key* sk, br_rsa_public_key* pk){
-    Deferral(16);
+    Deferral(8);
     br_rsa_compute_modulus compute_modulus = br_rsa_i31_compute_modulus;
 	br_rsa_compute_pubexp compute_pubexp = br_rsa_i31_compute_pubexp;
     

src/cryptography/cryptography.h

@@ -18,6 +18,7 @@
 void hash_password(Array(u8) password, u8* out_buffer, i32 iterations);
 #define password_hash_size 32
 
+#define __passhash_lvl_iter 1e5
 
 //////////////////////////////////////////////////////////////////////////////
 //                                  rng.c                                  //
@@ -86,6 +87,8 @@ void DecryptorAES_decrypt(DecryptorAES* ptr, Array(u8) src, Array(u8) dst, u32*
 //                                  RSA.c                                   //
 //////////////////////////////////////////////////////////////////////////////
 
+#define __rsa_key_size_default 3072
+
 /// @brief generate random key pair based on system time
 /// @param key_size size of public key in bits (2048/3072/4096)
 /// @param sk key for decryption
@@ -95,6 +98,12 @@ Result(void) RSA_generateKeyPair(u32 key_size,
     br_rsa_private_key* sk, br_rsa_public_key* pk,
     const br_prng_class** rng_vtable_ptr);
 
+Result(void) RSA_generateKeyPairFromTime(u32 key_size, 
+    br_rsa_private_key* sk, br_rsa_public_key* pk);
+
+Result(void) RSA_generateKeyPairFromPassword(u32 key_size, 
+    br_rsa_private_key* sk, br_rsa_public_key* pk, str password);
+
 static inline void RSA_destroyPrivateKey(br_rsa_private_key* sk){
     free(sk->p);
 }