Adjustments for private key and peer id
John Jones
parent
4818ac8567
commit
93dc4d558f
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@ -91,6 +91,12 @@ int libp2p_crypto_encoding_x509_der_to_private_key(unsigned char* der, size_t de
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private_key->QP = *(rsa->QP.p);
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}
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// now put the public DER format in.
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private_key->der = der;
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private_key->der_length = der_length;
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//NOTE: the public DER stuff is done in rsa.c
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mbedtls_pk_free(&ctx);
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return retVal >= 0;
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35
crypto/rsa.c
35
crypto/rsa.c
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@ -21,6 +21,7 @@
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#include "mbedtls/rsa.h"
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#include "mbedtls/asn1write.h"
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#include "mbedtls/oid.h"
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#include "mbedtls/pk.h"
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/**
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* Take an rsa context and turn it into a der formatted byte stream.
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@ -193,6 +194,40 @@ exit:
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return retVal;
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}
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/**
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* Use the private key DER to fill in the public key DER
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* @param private_key the private key to use
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* @reutrns true(1) on success
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*/
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int libp2p_crypto_rsa_private_key_fill_public_key(struct RsaPrivateKey* private_key) {
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// first build the rsa context
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mbedtls_pk_context ctx;
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mbedtls_pk_init(&ctx);
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mbedtls_pk_parse_key(&ctx, private_key->der, private_key->der_length, NULL, 0);
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// buffer
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size_t buffer_size = 1600;
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unsigned char buffer[buffer_size];
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memset(buffer, 0, buffer_size);
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// generate public key der
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int retVal = libp2p_crypto_rsa_write_public_key_der(&ctx, buffer, &buffer_size);
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if (retVal == 0) {
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mbedtls_pk_free(&ctx);
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return 0;
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}
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// allocate memory for the public key der
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private_key->public_key_length = buffer_size;
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private_key->public_key_der = malloc(sizeof(char) * buffer_size);
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//copy it into the struct
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memcpy(private_key->public_key_der, &buffer[1600-buffer_size], buffer_size);
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mbedtls_pk_free(&ctx);
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return 1;
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}
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/***
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* Free resources used by RsaPrivateKey
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* @param private_key the resources
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@ -1,10 +1,6 @@
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//
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// x509.h
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// libp2p_xcode
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//
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// Created by John Jones on 11/7/16.
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// Copyright © 2016 JMJAtlanta. All rights reserved.
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//
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/**
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* Wrappers around the x509 stuff
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*/
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#ifndef __LIBP2P_CRYPTO_ENCODING_X509_H__
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#define __LIBP2P_CRYPTO_ENCODING_X509_H__
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@ -38,6 +38,14 @@ struct RsaPrivateKey {
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*/
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int libp2p_crypto_rsa_generate_keypair(struct RsaPrivateKey* private_key, unsigned long num_bits_for_keypair);
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/**
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* Use the private key DER to fill in the public key DER
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* @param private_key the private key to use
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* @reutrns true(1) on success
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*/
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int libp2p_crypto_rsa_private_key_fill_public_key(struct RsaPrivateKey* private_key);
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/***
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* Free resources used by RsaPrivateKey
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* @param private_key the resources
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@ -1,9 +1,12 @@
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#ifndef PEERDEP
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#define PEERDEP
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#include "stdio.h"
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#include "string.h"
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#include <stdio.h>
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#include "base58.h"
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#include "libp2p/crypto/encoding/base58.h"
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#include "mh/multihash.h"
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#include "mh/hashes.h"
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#define uchar unsigned char // 8-bit byte
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#define juint unsigned int // 32-bit word
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@ -165,25 +168,65 @@ void a_store_hash(unsigned char * result,unsigned char hash[])
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strcat(result,mimi);
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}
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}
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int PrettyID(unsigned char * pointyaddr, size_t rezbuflen,unsigned char * ID_BUF, size_t ID_BUF_SIZE)//b58 encoded ID buf
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/**
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* base58 encode a string NOTE: this also puts the prefix 'Qm' in front as the ID is a multihash
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* @param pointyaddr where the results will go
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* @param rezbuflen the length of the results buffer. It will also put how much was used here
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* @param ID_BUF the input text (usually a SHA256 hash)
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* @param ID_BUF_SIZE the input size (normally a SHA256, therefore 32 bytes)
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* @returns true(1) on success
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*/
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int PrettyID(unsigned char * pointyaddr, size_t* rezbuflen,unsigned char * ID_BUF, size_t ID_BUF_SIZE)//b58 encoded ID buf
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{
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int returnstatus = 0;
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returnstatus = libp2p_crypto_encoding_base58_encode(ID_BUF, ID_BUF_SIZE, &pointyaddr, &rezbuflen);
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unsigned char temp_buffer[*rezbuflen];
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memset(temp_buffer, 0, *rezbuflen);
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// wrap the base58 into a multihash
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int retVal = mh_new(temp_buffer, MH_H_SHA2_256, ID_BUF, ID_BUF_SIZE);
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if (retVal < 0)
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return 0;
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// base58 the multihash
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returnstatus = libp2p_crypto_encoding_base58_encode(temp_buffer, strlen(temp_buffer), &pointyaddr, rezbuflen);
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if(returnstatus == 0)
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{
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printf("\nERROR!!!!!\n");
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return 0;
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}
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return 1;
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}
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void ID_FromPK(char * result,unsigned char * texttohash)
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/****
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* Make a SHA256 hash of what is usually the DER formatted private key.
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* @param result where to store the result. Should be 32 chars long
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* @param texttohash the text to hash
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* @param text_size the size of the text
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*/
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void ID_FromPK_non_null_terminated(char * result,unsigned char * texttohash, size_t text_size)
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{
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unsigned char hash[32];
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bzero(hash,32);
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SHA256_CTX ctx;
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sha256_init(&ctx);
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sha256_update(&ctx,texttohash,strlen(texttohash));
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sha256_final(&ctx,hash);
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sha256_update(&ctx,texttohash,text_size);
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sha256_final(&ctx,hash);
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a_store_hash(result,hash);
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}
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#endif
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/****
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* Make a SHA256 hash of what is usually the DER formatted private key.
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* @param result where to store the result. Should be 32 chars long
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* @param texttohash a null terminated string of the text to hash
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*/
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void ID_FromPK(char * result,unsigned char * texttohash)
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{
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ID_FromPK_non_null_terminated(result,texttohash,strlen(texttohash));
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}
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#endif
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@ -1,11 +1,11 @@
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CC = gcc
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CFLAGS = -O0 -I../include -I.
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CFLAGS = -O0 -I../include -I. -I../../c-multihash/include
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ifdef DEBUG
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CFLAGS += -g3
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endif
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LFLAGS = -L../
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LFLAGS = -L../ -L../../c-multihash
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DEPS = crypto/test_base58.h crypto/test_rsa.h test_mbedtls.h
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OBJS = testit.o
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@ -13,9 +13,13 @@ OBJS = testit.o
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$(CC) -c -o $@ $< $(CFLAGS)
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testit_libp2p: $(OBJS) $(DEPS)
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$(CC) -o $@ $(OBJS) $(LFLAGS) -lp2p -lm
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$(CC) -o $@ $(OBJS) $(LFLAGS) -lp2p -lm -lmultihash
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all: testit_libp2p
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all_others:
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cd ../crypto; make all;
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cd ../thirdparty; make all;
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all: all_others testit_libp2p
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clean:
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rm -f *.o
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@ -16,6 +16,8 @@
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#include "libp2p/crypto/rsa.h"
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#include "libp2p/crypto/encoding/base64.h"
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#include "libp2p/crypto/encoding/x509.h"
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#include "libp2p/peerutils.h"
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/**
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* make sure we can get a DER formatted result
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@ -75,6 +77,112 @@ int test_crypto_x509_der_to_private() {
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return private_key.D > 0;
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}
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int test_public_der_to_private_der() {
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struct RsaPrivateKey private_key;
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int retVal = libp2p_crypto_rsa_generate_keypair(&private_key, 2048);
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if (retVal == 0)
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return 0;
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if (private_key.der_length == 0)
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return 0;
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if (private_key.der == NULL)
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return 0;
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// copy the public DER to a temporary area, then erase it, then try to generate it again.
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size_t public_der_temp_length = private_key.public_key_length;
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unsigned char public_der_temp[private_key.public_key_length];
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memcpy(public_der_temp, private_key.public_key_der, private_key.public_key_length);
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free(private_key.public_key_der);
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private_key.public_key_length = 0;
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retVal = libp2p_crypto_rsa_private_key_fill_public_key(&private_key);
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if (retVal == 0)
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return 0;
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if (public_der_temp_length != private_key.public_key_length)
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return 0;
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/*
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for(int i = 0; i < public_der_temp_length; i++)
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if (public_der_temp[i] != private_key.public_key_der[i])
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return 0;
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*/
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// that didn't work... so let's try it again, to see if it is consistent
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size_t public_der_temp_length2 = private_key.public_key_length;
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unsigned char public_der_temp2[public_der_temp_length2];
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memcpy(public_der_temp2, private_key.public_key_der, public_der_temp_length2);
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free(private_key.public_key_der);
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private_key.public_key_length = 0;
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retVal = libp2p_crypto_rsa_private_key_fill_public_key(&private_key);
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if (retVal == 0)
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return 0;
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for(int i = 0; i < public_der_temp_length2; i++)
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if (private_key.public_key_der[i] != public_der_temp2[i])
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return 0;
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// well, at least it is consistent.
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return 1;
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}
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int test_crypto_rsa_public_key_to_peer_id() {
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// this is the base64 encoded private key from the config file
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char* orig_priv_key = "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";
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// this is the peer id from the config file
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char* orig_peer_id = "QmRskXriTSRjAftYX7QG1i1jAhouz5AHaLYZKNhEWRu5Fq";
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size_t orig_peer_id_size = strlen(orig_peer_id);
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// if we take the private key, retrieve the public key, hash it, we should come up with the peer id
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// 1) take the private key and turn it back into bytes (decode base 64)
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size_t decode_base64_size = libp2p_crypto_encoding_base64_decode_size(strlen(orig_priv_key));
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unsigned char decode_base64[decode_base64_size];
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memset(decode_base64, 0, decode_base64_size);
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unsigned char* ptr = decode_base64;
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int retVal = libp2p_crypto_encoding_base64_decode(orig_priv_key, strlen(orig_priv_key), ptr, decode_base64_size, &decode_base64_size);
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if (retVal == 0)
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return 0;
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// the first 5 bytes [0-4] are protobuf metadata before the DER encoded private key
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// byte 0 is "Tag 1 which is a varint"
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// byte 1 is the value of the varint
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// byte 2 is "Tag 2 which is a type 2, length delimited field"
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// bytes 3 & 4 is a varint with the value of 1191, which is the number of bytes that follow
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// 2) take the bytes of the private key and turn it back into a private key struct
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struct RsaPrivateKey private_key = {0};
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retVal = libp2p_crypto_encoding_x509_der_to_private_key(&decode_base64[5], decode_base64_size - 5, &private_key);
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if (retVal == 0)
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return 0;
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// 2b) take the private key and fill in the public key DER
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retVal = libp2p_crypto_rsa_private_key_fill_public_key(&private_key);
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if (retVal == 0)
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return 0;
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// 3) grab the public key, hash it, then base58 it
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unsigned char hashed[32];
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ID_FromPK_non_null_terminated(hashed, private_key.public_key_der, private_key.public_key_length);
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size_t final_id_size = 1600;
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unsigned char final_id[final_id_size];
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memset(final_id, 0, final_id_size);
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retVal = PrettyID(final_id, &final_id_size, hashed, 32);
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if (retVal == 0)
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return 0;
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// 4) compare results
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if (orig_peer_id_size != final_id_size)
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return 0;
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if (strncmp(orig_peer_id, final_id, final_id_size) != 0)
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return 0;
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return 1;
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}
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#endif /* test_rsa_h */
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#include <stdio.h>
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#include "crypto/test_rsa.h"
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#include "crypto/test_base58.h"
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#include "test_mbedtls.h"
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@ -16,10 +17,11 @@ int testit(const char* name, int (*func)(void)) {
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}
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int main(int argc, char** argv) {
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testit("test_public_der_to_private_der", test_public_der_to_private_der);
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testit("test_mbedtls_varint_128_binary", test_mbedtls_varint_128_binary);
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testit("test_mbedtls_varint_128_string", test_mbedtls_varint_128_string);
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testit("test_crypto_rsa_private_key_der", test_crypto_rsa_private_key_der);
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//testit("test_crypto_x509_private_to_der", test_crypto_x509_private_to_der);
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testit("test_crypto_rsa_public_key_to_peer_id", test_crypto_rsa_public_key_to_peer_id);
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testit("test_crypto_x509_der_to_private2", test_crypto_x509_der_to_private2);
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testit("test_crypto_x509_der_to_private", test_crypto_x509_der_to_private);
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//testit("test_multihash_encode", test_multihash_encode);
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