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Jeff Thompson47c93cf2013-08-09 00:38:48 -07001/**
2 * @author: Jeff Thompson
3 * See COPYING for copyright and distribution information.
4 */
5
6#include <stdexcept>
Jeff Thompson7a67cb62013-08-26 11:43:18 -07007#include "../c/util/crypto.h"
8#include "../c/encoding/binary-xml-data.h"
9#include "../encoding/binary-xml-encoder.hpp"
Jeff Thompson47c93cf2013-08-09 00:38:48 -070010#include "key-chain.hpp"
11
12using namespace std;
13
14namespace ndn {
15
Jeff Thompson3df81372013-08-09 12:02:37 -070016static unsigned char DEFAULT_PUBLIC_KEY_DER[] = {
Jeff Thompson47c93cf2013-08-09 00:38:48 -0700170x30, 0x81, 0x9F, 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x81,
180x8D, 0x00, 0x30, 0x81, 0x89, 0x02, 0x81, 0x81, 0x00, 0xE1, 0x7D, 0x30, 0xA7, 0xD8, 0x28, 0xAB, 0x1B, 0x84, 0x0B, 0x17,
190x54, 0x2D, 0xCA, 0xF6, 0x20, 0x7A, 0xFD, 0x22, 0x1E, 0x08, 0x6B, 0x2A, 0x60, 0xD1, 0x6C, 0xB7, 0xF5, 0x44, 0x48, 0xBA,
200x9F, 0x3F, 0x08, 0xBC, 0xD0, 0x99, 0xDB, 0x21, 0xDD, 0x16, 0x2A, 0x77, 0x9E, 0x61, 0xAA, 0x89, 0xEE, 0xE5, 0x54, 0xD3,
210xA4, 0x7D, 0xE2, 0x30, 0xBC, 0x7A, 0xC5, 0x90, 0xD5, 0x24, 0x06, 0x7C, 0x38, 0x98, 0xBB, 0xA6, 0xF5, 0xDC, 0x43, 0x60,
220xB8, 0x45, 0xED, 0xA4, 0x8C, 0xBD, 0x9C, 0xF1, 0x26, 0xA7, 0x23, 0x44, 0x5F, 0x0E, 0x19, 0x52, 0xD7, 0x32, 0x5A, 0x75,
230xFA, 0xF5, 0x56, 0x14, 0x4F, 0x9A, 0x98, 0xAF, 0x71, 0x86, 0xB0, 0x27, 0x86, 0x85, 0xB8, 0xE2, 0xC0, 0x8B, 0xEA, 0x87,
240x17, 0x1B, 0x4D, 0xEE, 0x58, 0x5C, 0x18, 0x28, 0x29, 0x5B, 0x53, 0x95, 0xEB, 0x4A, 0x17, 0x77, 0x9F, 0x02, 0x03, 0x01,
250x00, 01
26};
27
Jeff Thompson3df81372013-08-09 12:02:37 -070028static unsigned char DEFAULT_PRIVATE_KEY_DER[] = {
290x30, 0x82, 0x02, 0x5d, 0x02, 0x01, 0x00, 0x02, 0x81, 0x81, 0x00, 0xe1, 0x7d, 0x30, 0xa7, 0xd8, 0x28, 0xab, 0x1b, 0x84,
300x0b, 0x17, 0x54, 0x2d, 0xca, 0xf6, 0x20, 0x7a, 0xfd, 0x22, 0x1e, 0x08, 0x6b, 0x2a, 0x60, 0xd1, 0x6c, 0xb7, 0xf5, 0x44,
310x48, 0xba, 0x9f, 0x3f, 0x08, 0xbc, 0xd0, 0x99, 0xdb, 0x21, 0xdd, 0x16, 0x2a, 0x77, 0x9e, 0x61, 0xaa, 0x89, 0xee, 0xe5,
320x54, 0xd3, 0xa4, 0x7d, 0xe2, 0x30, 0xbc, 0x7a, 0xc5, 0x90, 0xd5, 0x24, 0x06, 0x7c, 0x38, 0x98, 0xbb, 0xa6, 0xf5, 0xdc,
330x43, 0x60, 0xb8, 0x45, 0xed, 0xa4, 0x8c, 0xbd, 0x9c, 0xf1, 0x26, 0xa7, 0x23, 0x44, 0x5f, 0x0e, 0x19, 0x52, 0xd7, 0x32,
340x5a, 0x75, 0xfa, 0xf5, 0x56, 0x14, 0x4f, 0x9a, 0x98, 0xaf, 0x71, 0x86, 0xb0, 0x27, 0x86, 0x85, 0xb8, 0xe2, 0xc0, 0x8b,
350xea, 0x87, 0x17, 0x1b, 0x4d, 0xee, 0x58, 0x5c, 0x18, 0x28, 0x29, 0x5b, 0x53, 0x95, 0xeb, 0x4a, 0x17, 0x77, 0x9f, 0x02,
360x03, 0x01, 0x00, 0x01, 0x02, 0x81, 0x80, 0x1a, 0x4b, 0xfa, 0x4f, 0xa8, 0xc2, 0xdd, 0x69, 0xa1, 0x15, 0x96, 0x0b, 0xe8,
370x27, 0x42, 0x5a, 0xf9, 0x5c, 0xea, 0x0c, 0xac, 0x98, 0xaa, 0xe1, 0x8d, 0xaa, 0xeb, 0x2d, 0x3c, 0x60, 0x6a, 0xfb, 0x45,
380x63, 0xa4, 0x79, 0x83, 0x67, 0xed, 0xe4, 0x15, 0xc0, 0xb0, 0x20, 0x95, 0x6d, 0x49, 0x16, 0xc6, 0x42, 0x05, 0x48, 0xaa,
390xb1, 0xa5, 0x53, 0x65, 0xd2, 0x02, 0x99, 0x08, 0xd1, 0x84, 0xcc, 0xf0, 0xcd, 0xea, 0x61, 0xc9, 0x39, 0x02, 0x3f, 0x87,
400x4a, 0xe5, 0xc4, 0xd2, 0x07, 0x02, 0xe1, 0x9f, 0xa0, 0x06, 0xc2, 0xcc, 0x02, 0xe7, 0xaa, 0x6c, 0x99, 0x8a, 0xf8, 0x49,
410x00, 0xf1, 0xa2, 0x8c, 0x0c, 0x8a, 0xb9, 0x4f, 0x6d, 0x73, 0x3b, 0x2c, 0xb7, 0x9f, 0x8a, 0xa6, 0x7f, 0x9b, 0x9f, 0xb7,
420xa1, 0xcc, 0x74, 0x2e, 0x8f, 0xb8, 0xb0, 0x26, 0x89, 0xd2, 0xe5, 0x66, 0xe8, 0x8e, 0xa1, 0x02, 0x41, 0x00, 0xfc, 0xe7,
430x52, 0xbc, 0x4e, 0x95, 0xb6, 0x1a, 0xb4, 0x62, 0xcc, 0xd8, 0x06, 0xe1, 0xdc, 0x7a, 0xa2, 0xb6, 0x71, 0x01, 0xaa, 0x27,
440xfc, 0x99, 0xe5, 0xf2, 0x54, 0xbb, 0xb2, 0x85, 0xe1, 0x96, 0x54, 0x2d, 0xcb, 0xba, 0x86, 0xfa, 0x80, 0xdf, 0xcf, 0x39,
450xe6, 0x74, 0xcb, 0x22, 0xce, 0x70, 0xaa, 0x10, 0x00, 0x73, 0x1d, 0x45, 0x0a, 0x39, 0x51, 0x84, 0xf5, 0x15, 0x8f, 0x37,
460x76, 0x91, 0x02, 0x41, 0x00, 0xe4, 0x3f, 0xf0, 0xf4, 0xde, 0x79, 0x77, 0x48, 0x9b, 0x9c, 0x28, 0x45, 0x26, 0x57, 0x3c,
470x71, 0x40, 0x28, 0x6a, 0xa1, 0xfe, 0xc3, 0xe5, 0x37, 0xa1, 0x03, 0xf6, 0x2d, 0xbe, 0x80, 0x64, 0x72, 0x69, 0x2e, 0x9b,
480x4d, 0xe3, 0x2e, 0x1b, 0xfe, 0xe7, 0xf9, 0x77, 0x8c, 0x18, 0x53, 0x9f, 0xe2, 0xfe, 0x00, 0xbb, 0x49, 0x20, 0x47, 0xdf,
490x01, 0x61, 0x87, 0xd6, 0xe3, 0x44, 0xb5, 0x03, 0x2f, 0x02, 0x40, 0x54, 0xec, 0x7c, 0xbc, 0xdd, 0x0a, 0xaa, 0xde, 0xe6,
500xc9, 0xf2, 0x8d, 0x6c, 0x2a, 0x35, 0xf6, 0x3c, 0x63, 0x55, 0x29, 0x40, 0xf1, 0x32, 0x82, 0x9f, 0x53, 0xb3, 0x9e, 0x5f,
510xc1, 0x53, 0x52, 0x3e, 0xac, 0x2e, 0x28, 0x51, 0xa1, 0x16, 0xdb, 0x90, 0xe3, 0x99, 0x7e, 0x88, 0xa4, 0x04, 0x7c, 0x92,
520xae, 0xd2, 0xe7, 0xd4, 0xe1, 0x55, 0x20, 0x90, 0x3e, 0x3c, 0x6a, 0x63, 0xf0, 0x34, 0xf1, 0x02, 0x41, 0x00, 0x84, 0x5a,
530x17, 0x6c, 0xc6, 0x3c, 0x84, 0xd0, 0x93, 0x7a, 0xff, 0x56, 0xe9, 0x9e, 0x98, 0x2b, 0xcb, 0x5a, 0x24, 0x4a, 0xff, 0x21,
540xb4, 0x9e, 0x87, 0x3d, 0x76, 0xd8, 0x9b, 0xa8, 0x73, 0x96, 0x6c, 0x2b, 0x5c, 0x5e, 0xd3, 0xa6, 0xff, 0x10, 0xd6, 0x8e,
550xaf, 0xa5, 0x8a, 0xcd, 0xa2, 0xde, 0xcb, 0x0e, 0xbd, 0x8a, 0xef, 0xae, 0xfd, 0x3f, 0x1d, 0xc0, 0xd8, 0xf8, 0x3b, 0xf5,
560x02, 0x7d, 0x02, 0x41, 0x00, 0x8b, 0x26, 0xd3, 0x2c, 0x7d, 0x28, 0x38, 0x92, 0xf1, 0xbf, 0x15, 0x16, 0x39, 0x50, 0xc8,
570x6d, 0x32, 0xec, 0x28, 0xf2, 0x8b, 0xd8, 0x70, 0xc5, 0xed, 0xe1, 0x7b, 0xff, 0x2d, 0x66, 0x8c, 0x86, 0x77, 0x43, 0xeb,
580xb6, 0xf6, 0x50, 0x66, 0xb0, 0x40, 0x24, 0x6a, 0xaf, 0x98, 0x21, 0x45, 0x30, 0x01, 0x59, 0xd0, 0xc3, 0xfc, 0x7b, 0xae,
590x30, 0x18, 0xeb, 0x90, 0xfb, 0x17, 0xd3, 0xce, 0xb5
60};
61
Jeff Thompson8bee6102013-08-09 10:26:02 -070062/**
Jeff Thompson8bee6102013-08-09 10:26:02 -070063 * Call digestSha256 and set the digest vector to the result.
64 * @param data
65 * @param dataLength
66 * @param digest
Jeff Thompson47c93cf2013-08-09 00:38:48 -070067 */
Jeff Thompson1656e6a2013-08-29 18:01:48 -070068void setSha256(const unsigned char *data, unsigned int dataLength, vector<unsigned char>& digest)
Jeff Thompson47c93cf2013-08-09 00:38:48 -070069{
Jeff Thompson8bee6102013-08-09 10:26:02 -070070 unsigned char digestBuffer[SHA256_DIGEST_LENGTH];
Jeff Thompson3af7e792013-08-23 14:22:11 -070071 ndn_digestSha256(data, dataLength, digestBuffer);
Jeff Thompson8bee6102013-08-09 10:26:02 -070072 setVector(digest, digestBuffer, sizeof(digestBuffer));
Jeff Thompson47c93cf2013-08-09 00:38:48 -070073}
74
75/**
76 * Encode the fields of the Data object and set digest to the sha-256 digest.
77 * @param data The Data object with the fields to digest.
Jeff Thompson8bee6102013-08-09 10:26:02 -070078 * @param digest A pointer to a buffer of size SHA256_DIGEST_LENGTH to receive the data.
Jeff Thompson47c93cf2013-08-09 00:38:48 -070079 */
Jeff Thompson1656e6a2013-08-29 18:01:48 -070080static void digestDataFieldsSha256(const Data& data, WireFormat& wireFormat, unsigned char *digest)
Jeff Thompson47c93cf2013-08-09 00:38:48 -070081{
Jeff Thompson47c93cf2013-08-09 00:38:48 -070082 unsigned int signedFieldsBeginOffset, signedFieldsEndOffset;
Jeff Thompson8efe5ad2013-08-20 17:36:38 -070083 ptr_lib::shared_ptr<vector<unsigned char> > encoding = wireFormat.encodeData(data, &signedFieldsBeginOffset, &signedFieldsEndOffset);
Jeff Thompson47c93cf2013-08-09 00:38:48 -070084
Jeff Thompson3af7e792013-08-23 14:22:11 -070085 ndn_digestSha256(&encoding->front() + signedFieldsBeginOffset, signedFieldsEndOffset - signedFieldsBeginOffset, digest);
Jeff Thompson47c93cf2013-08-09 00:38:48 -070086}
87
Jeff Thompson3c73da42013-08-12 11:19:05 -070088void KeyChain::sign
Jeff Thompson1656e6a2013-08-29 18:01:48 -070089 (Data& data, const unsigned char *publicKeyDer, unsigned int publicKeyDerLength,
90 const unsigned char *privateKeyDer, unsigned int privateKeyDerLength, WireFormat& wireFormat)
Jeff Thompson47c93cf2013-08-09 00:38:48 -070091{
Jeff Thompson3df81372013-08-09 12:02:37 -070092 // Set the public key.
Jeff Thompsonfec716d2013-09-11 13:54:36 -070093 setSha256(publicKeyDer, publicKeyDerLength, data.getMetaInfo().getPublisherPublicKeyDigest().getPublisherPublicKeyDigest());
94 data.getMetaInfo().getKeyLocator().setType(ndn_KeyLocatorType_KEY);
95 data.getMetaInfo().getKeyLocator().setKeyData(publicKeyDer, publicKeyDerLength);
Jeff Thompson3c73da42013-08-12 11:19:05 -070096 // Clear the signature so we don't encode it below.
97 data.getSignature().clear();
Jeff Thompson3df81372013-08-09 12:02:37 -070098
99 // Sign the fields.
Jeff Thompson8bee6102013-08-09 10:26:02 -0700100 unsigned char dataFieldsDigest[SHA256_DIGEST_LENGTH];
Jeff Thompson8efe5ad2013-08-20 17:36:38 -0700101 digestDataFieldsSha256(data, wireFormat, dataFieldsDigest);
Jeff Thompson47c93cf2013-08-09 00:38:48 -0700102 // TODO: use RSA_size to get the proper size of the signature buffer.
103 unsigned char signature[1000];
104 unsigned int signatureLength;
Jeff Thompson192e86b2013-08-13 11:34:24 -0700105 // Use a temporary pointer since d2i updates it.
106 const unsigned char *derPointer = privateKeyDer;
107 RSA *privateKey = d2i_RSAPrivateKey(NULL, &derPointer, privateKeyDerLength);
Jeff Thompson3df81372013-08-09 12:02:37 -0700108 if (!privateKey)
109 throw std::runtime_error("Error decoding private key in d2i_RSAPrivateKey");
110 int success = RSA_sign(NID_sha256, dataFieldsDigest, sizeof(dataFieldsDigest), signature, &signatureLength, privateKey);
111 // Free the private key before checking for success.
112 RSA_free(privateKey);
113 if (!success)
114 throw std::runtime_error("Error in RSA_sign");
Jeff Thompson47c93cf2013-08-09 00:38:48 -0700115
116 data.getSignature().setSignature(signature, signatureLength);
Jeff Thompsonb81192e2013-08-09 09:34:51 -0700117}
Jeff Thompson47c93cf2013-08-09 00:38:48 -0700118
Jeff Thompson1656e6a2013-08-29 18:01:48 -0700119void KeyChain::defaultSign(Data& data, WireFormat& wireFormat)
Jeff Thompson3c73da42013-08-12 11:19:05 -0700120{
Jeff Thompson2a66dec2013-08-20 17:41:50 -0700121 sign(data, DEFAULT_PUBLIC_KEY_DER, sizeof(DEFAULT_PUBLIC_KEY_DER), DEFAULT_PRIVATE_KEY_DER, sizeof(DEFAULT_PRIVATE_KEY_DER), wireFormat);
Jeff Thompson3c73da42013-08-12 11:19:05 -0700122}
123
Jeff Thompson1656e6a2013-08-29 18:01:48 -0700124void KeyChain::defaultSign(Data& data)
Jeff Thompson8efe5ad2013-08-20 17:36:38 -0700125{
126 sign(data, DEFAULT_PUBLIC_KEY_DER, sizeof(DEFAULT_PUBLIC_KEY_DER), DEFAULT_PRIVATE_KEY_DER, sizeof(DEFAULT_PRIVATE_KEY_DER),
127 *WireFormat::getDefaultWireFormat());
128}
129
Jeff Thompson1656e6a2013-08-29 18:01:48 -0700130bool KeyChain::selfVerifyData(const unsigned char *input, unsigned int inputLength, WireFormat& wireFormat)
Jeff Thompson1e90d8c2013-08-12 16:09:25 -0700131{
132 // Decode the data packet and digest the data fields.
133 Data data;
134 unsigned int signedFieldsBeginOffset, signedFieldsEndOffset;
135 wireFormat.decodeData(data, input, inputLength, &signedFieldsBeginOffset, &signedFieldsEndOffset);
136 if (data.getSignature().getDigestAlgorithm().size() != 0)
137 // TODO: Allow a non-default digest algorithm.
138 throw std::runtime_error("Cannot verify a data packet with a non-default digest algorithm");
139 unsigned char dataFieldsDigest[SHA256_DIGEST_LENGTH];
Jeff Thompson3af7e792013-08-23 14:22:11 -0700140 ndn_digestSha256(input + signedFieldsBeginOffset, signedFieldsEndOffset - signedFieldsBeginOffset, dataFieldsDigest);
Jeff Thompson1e90d8c2013-08-12 16:09:25 -0700141
142 // Find the public key.
143 const unsigned char *publicKeyDer;
144 unsigned int publicKeyDerLength;
Jeff Thompsonfec716d2013-09-11 13:54:36 -0700145 if (data.getMetaInfo().getKeyLocator().getType() == ndn_KeyLocatorType_KEY) {
146 publicKeyDer = &data.getMetaInfo().getKeyLocator().getKeyData().front();
147 publicKeyDerLength = data.getMetaInfo().getKeyLocator().getKeyData().size();
Jeff Thompson1e90d8c2013-08-12 16:09:25 -0700148 }
149 else
150 // Can't find a public key.
151 return false;
152
153 // Verify the dataFieldsDigest.
Jeff Thompson192e86b2013-08-13 11:34:24 -0700154 // Use a temporary pointer since d2i updates it.
155 const unsigned char *derPointer = publicKeyDer;
156 RSA *publicKey = d2i_RSA_PUBKEY(NULL, &derPointer, publicKeyDerLength);
Jeff Thompson1e90d8c2013-08-12 16:09:25 -0700157 if (!publicKey)
158 throw std::runtime_error("Error decoding public key in d2i_RSAPublicKey");
159 int success = RSA_verify
160 (NID_sha256, dataFieldsDigest, sizeof(dataFieldsDigest), &data.getSignature().getSignature().front(),
161 data.getSignature().getSignature().size(), publicKey);
162 // Free the public key before checking for success.
163 RSA_free(publicKey);
164
165 return (success == 1);
166}
167
Jeff Thompson47c93cf2013-08-09 00:38:48 -0700168}