added base64 of pub/private key pair

include/ipfs/repo/config/base64.h

@@ -0,0 +1,58 @@
+//
+//  base64.h
+//  c-ipfs
+//
+//  Created by John Jones on 10/31/16.
+//  Copyright © 2016 JMJAtlanta. All rights reserved.
+//
+
+#ifndef base64_h
+#define base64_h
+
+#include <stdio.h>
+#include "mbedtls/base64.h"
+
+/**
+ * encode using base64
+ * @param input_data the data to be encoded
+ * @param input_length the length of the input data
+ * @param output_data where the data is to be stored
+ * @param max_output_length the max size of the output_data
+ * @param bytes_written the number of bytes written to output_data
+ * @returns true(1) on success, otherwise false
+ */
+int base64_encode(const unsigned char* input_data, size_t input_length, unsigned char* output_data, size_t max_output_length, size_t* bytes_written) {
+	int retVal = mbedtls_base64_encode(output_data, max_output_length, bytes_written, input_data, input_length);
+	return retVal == 0;
+}
+
+size_t base64_encode_length(const unsigned char* input_data, size_t input_length) {
+	size_t req_bytes;
+	int retVal = mbedtls_base64_encode(NULL, 0, &req_bytes, input_data, input_length);
+	if( retVal != 0)
+		return 0;
+	return req_bytes;
+}
+
+/**
+ * decode something that was encoded as base64
+ * @param input_data the data to decode
+ * @param input_length the length of the input data
+ * @param output_data the buffer to store the output
+ * @param max_output_length the length of the output buffer
+ * @param bytes_written the number of bytes written to output_data
+ * @returns a pointer to the decoded data
+ */
+int base64_decode(const unsigned char* input_data, size_t input_length, unsigned char* output_data, size_t max_output_length, size_t* bytes_written) {
+	int retVal = mbedtls_base64_decode(output_data, max_output_length, bytes_written, input_data, input_length);
+	return retVal == 0;
+}
+
+size_t base64_decode_length(const unsigned char* input_data, size_t input_length) {
+	size_t req_bytes;
+	int retVal = mbedtls_base64_decode(NULL, 0, &req_bytes, input_data, input_length);
+	if( retVal != 0)
+		return 0;
+	return req_bytes;
+}
+#endif /* base64_h */

mbedtls/x509_crl.c

@@ -491,7 +491,7 @@ int mbedtls_x509_crl_parse( mbedtls_x509_crl *chain, const unsigned char *buf, s
 {
 #if defined(MBEDTLS_PEM_PARSE_C)
     int ret;
-    size_t use_len;
+    size_t use_len = 0;
     mbedtls_pem_context pem;
     int is_pem = 0;
 

repo/config/identity.c

@@ -8,11 +8,107 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "ipfs/repo/config/identity.h"
+#include "ipfs/repo/config/base64.h"
 
-int repo_config_identity_generate_keypair(char* private_key, char* public_key) {
-	return 0;
+// mbedtls stuff
+#include "mbedtls/config.h"
+#include "mbedtls/platform.h"
+#include "mbedtls/entropy.h"
+#include "mbedtls/ctr_drbg.h"
+#include "mbedtls/bignum.h"
+#include "mbedtls/x509.h"
+#include "mbedtls/rsa.h"
+
+int repo_config_identity_generate_keypair(unsigned char* private_key, unsigned char* public_key, unsigned long num_bits_for_keypair) {
+
+	mbedtls_rsa_context rsa;
+	mbedtls_entropy_context entropy;
+	mbedtls_ctr_drbg_context ctr_drbg;
+	
+	int exponent = 65537;
+	int retVal = 1;
+	
+	const char *pers = "rsa_genkey";
+	
+	// initialize mbedtls structs
+	mbedtls_ctr_drbg_init( &ctr_drbg );
+	mbedtls_entropy_init( &entropy );
+	
+	// seed the routines
+	if( ( retVal = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
+									  (const unsigned char *) pers,
+									  strlen( pers ) ) ) != 0 )
+	{
+		retVal = 0;
+		goto exit;
+	}
+	
+	// initialize the rsa struct
+	mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
+	
+	// finally, generate the key
+	if( ( retVal = mbedtls_rsa_gen_key( &rsa, mbedtls_ctr_drbg_random, &ctr_drbg, (unsigned int)num_bits_for_keypair,
+									exponent ) ) != 0 )
+	{
+		retVal = 0;
+		goto exit;
+	}
+	retVal = 1;
+	
+	struct {
+		unsigned long long modulus;
+		unsigned long long public_exponent;
+	} pub_key;
+	
+	pub_key.modulus = *(rsa.N.p);
+	pub_key.public_exponent = *(rsa.E.p);
+	
+	struct {
+		unsigned long long modulus;
+		unsigned long long public_exponent;
+		unsigned long long private_exponent;
+		unsigned long long prime1;
+		unsigned long long prime2;
+		unsigned long long exponent1;
+		unsigned long long exponent2;
+		unsigned long long coefficient;
+	} priv_key;
+	
+	priv_key.modulus = *(rsa.N.p);
+	priv_key.public_exponent = *(rsa.E.p);
+	priv_key.private_exponent = *(rsa.D.p);
+	priv_key.prime1 = *(rsa.P.p);
+	priv_key.prime2 = *(rsa.Q.p);
+	//TODO: verify these 3
+	priv_key.exponent1 = *(rsa.DP.p);
+	priv_key.exponent2 = *(rsa.DQ.p);
+	priv_key.coefficient = *(rsa.QP.p);
+	
+	// convert keys to base 64 and then store
+	unsigned char* input_buf = malloc(sizeof(pub_key));
+	memcpy(input_buf, &pub_key, sizeof(pub_key));
+	size_t bufLen = base64_encode_length(input_buf, sizeof(pub_key));
+	public_key = malloc(sizeof(char) * bufLen);
+	retVal = base64_encode(input_buf, sizeof(pub_key), public_key, bufLen, &bufLen);
+	free(input_buf);
+	
+	input_buf = malloc(sizeof(priv_key));
+	memcpy(input_buf, &priv_key, sizeof(priv_key));
+	bufLen = base64_encode_length(input_buf, sizeof(pub_key));
+	private_key = malloc(sizeof(char) * bufLen);
+	retVal = base64_encode(input_buf, sizeof(priv_key), private_key, bufLen, &bufLen);
+	
+	retVal = 0;
+exit:
+
+	mbedtls_rsa_free( &rsa );
+	mbedtls_ctr_drbg_free( &ctr_drbg );
+	mbedtls_entropy_free( &entropy );
+	
+	return retVal;
 }
 
 /***
@@ -29,9 +125,9 @@ int repo_config_identity_new(struct Identity* identity, unsigned long num_bits_f
 	identity = malloc(sizeof(struct Identity));
 	if (num_bits_for_keypair < 1024)
 		return 0;
-	char* private_key;
-	char* public_key;
-	if (!repo_config_identity_generate_keypair(private_key, public_key))
+	unsigned char* private_key;
+	unsigned char* public_key;
+	if (!repo_config_identity_generate_keypair(private_key, public_key, num_bits_for_keypair))
 		return 0;
 	return 0;
 }