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BLS SSS
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| 1.0.1 | ||
| 1.1.0 |
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| /* | ||
| Licensed to the Apache Software Foundation (ASF) under one | ||
| or more contributor license agreements. See the NOTICE file | ||
| distributed with this work for additional information | ||
| regarding copyright ownership. The ASF licenses this file | ||
| to you under the Apache License, Version 2.0 (the | ||
| "License"); you may not use this file except in compliance | ||
| with the License. You may obtain a copy of the License at | ||
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| http://www.apache.org/licenses/LICENSE-2.0 | ||
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| Unless required by applicable law or agreed to in writing, | ||
| software distributed under the License is distributed on an"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| KIND, either express or implied. See the License for the | ||
| specific language governing permissions and limitations | ||
| under the License. | ||
| */ | ||
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| /* | ||
| BLS Shamir Secret Sharing example code. | ||
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| Build executable after installation: | ||
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| 1. Change headers; | ||
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| #include "bls_ZZZ.h" -> #include <amcl/bls_ZZZ.h> | ||
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| 2. Build code | ||
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| gcc -O0 -g ./example_bls_sss_ZZZ.c $(pkg-config --libs --cflags amcl) -o example_bls_sss_ZZZ | ||
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| */ | ||
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| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
| #include "config_curve_ZZZ.h" | ||
| #include "randapi.h" | ||
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| #if CURVE_SECURITY_ZZZ == 128 | ||
| #include "bls_ZZZ.h" | ||
| #elif CURVE_SECURITY_ZZZ == 192 | ||
| #include "bls192_ZZZ.h" | ||
| #elif CURVE_SECURITY_ZZZ == 256 | ||
| #include "bls256_ZZZ.h" | ||
| #endif | ||
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| // Support multiple security levels | ||
| #if CURVE_SECURITY_ZZZ == 128 | ||
| #define G2LEN 4*BFS_ZZZ | ||
| #elif CURVE_SECURITY_ZZZ == 192 | ||
| #define G2LEN 8*BFS_ZZZ | ||
| #elif CURVE_SECURITY_ZZZ == 256 | ||
| #define G2LEN 16*BFS_ZZZ | ||
| #endif | ||
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| static char message[]="test message"; | ||
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| int bls_sss(csprng *RNG) | ||
| { | ||
| int rc; | ||
| int n=4; | ||
| int k=3; | ||
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| char ski[BGS_ZZZ]; | ||
| octet SKI = {0,sizeof(ski),ski}; | ||
| char pki[G2LEN]; | ||
| octet PKI = {0,sizeof(pki),pki}; | ||
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| char sko[BGS_ZZZ]; | ||
| octet SKO = {sizeof(sko),sizeof(sko),sko}; | ||
| char skr[BGS_ZZZ]; | ||
| octet SKR = {sizeof(skr),sizeof(skr),skr}; | ||
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| char sigi[BFS_ZZZ+1]; | ||
| octet SIGI = {0,sizeof(sigi),sigi}; | ||
| char sigr[BFS_ZZZ+1]; | ||
| octet SIGR = {0,sizeof(sigr),sigr}; | ||
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| // Secret shares | ||
| char x[n][BGS_ZZZ]; | ||
| octet X[n]; | ||
| char y[n][BGS_ZZZ]; | ||
| octet Y[n]; | ||
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| for(int i=0; i<n; i++) | ||
| { | ||
| memset(&y[i], 0, sizeof(y[i])); | ||
| Y[i].max = BGS_ZZZ; | ||
| Y[i].len = BGS_ZZZ; | ||
| Y[i].val = y[i]; | ||
| memset(&x[i], 0, sizeof(x[i])); | ||
| X[i].max = BGS_ZZZ; | ||
| X[i].len = BGS_ZZZ; | ||
| X[i].val = x[i]; | ||
| } | ||
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| // Generate key pair | ||
| BLS_ZZZ_KEY_PAIR_GENERATE(RNG,&SKI,&PKI); | ||
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| printf("Private key SKI: "); | ||
| OCT_output(&SKI); | ||
| printf("Public key PKI: "); | ||
| OCT_output(&PKI); | ||
| printf("\n"); | ||
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| // Sign the message | ||
| BLS_ZZZ_SIGN(&SIGI,message,&SKI); | ||
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| printf("SIGI: "); | ||
| OCT_output(&SIGI); | ||
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| // Verify signature | ||
| rc=BLS_ZZZ_VERIFY(&SIGI,message,&PKI); | ||
| if (rc!=BLS_OK) | ||
| { | ||
| printf("Error: Invalid Signature\n"); | ||
| return 1; | ||
| } | ||
| printf("Success: Signature is valid\n"); | ||
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| // Make shares of BLS secret key | ||
| rc = BLS_ZZZ_MAKE_SHARES(k, n, RNG, X, Y, &SKI, &SKO); | ||
| if (rc!=BLS_OK) | ||
| { | ||
| printf("Error: BLS_ZZZ_MAKE_SHARES\n"); | ||
| return 1; | ||
| } | ||
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| for(int i=0; i<n; i++) | ||
| { | ||
| printf("X[%d] ", i); | ||
| OCT_output(&X[i]); | ||
| printf("Y[%d] ", i); | ||
| OCT_output(&Y[i]); | ||
| } | ||
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| printf("SKO: "); | ||
| OCT_output(&SKO); | ||
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| if (!OCT_comp(&SKI,&SKO)) | ||
| { | ||
| printf("FAILURE SKI != SKO"); | ||
| return 1; | ||
| } | ||
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| // Recover BLS secret key | ||
| rc = BLS_ZZZ_RECOVER_SECRET(k, X, Y, &SKR); | ||
| if (rc!=BLS_OK) | ||
| { | ||
| printf("Error: BLS_ZZZ_RECOVER_SECRET\n"); | ||
| return 1; | ||
| } | ||
| printf("SKR: "); | ||
| OCT_output(&SKR); | ||
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| if (!OCT_comp(&SKR,&SKO)) | ||
| { | ||
| printf("FAILURE SKR != SKO"); | ||
| return 1; | ||
| } | ||
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| // Generate public keys and signatures using shares | ||
| char pks[n][G2LEN]; | ||
| octet PKS[n]; | ||
| char sigs[n][BFS_ZZZ+1]; | ||
| octet SIGS[n]; | ||
| for(int i=0; i<n; i++) | ||
| { | ||
| memset(&sigs[i], 0, sizeof(sigs[i])); | ||
| SIGS[i].max = BFS_ZZZ+1; | ||
| SIGS[i].len = BFS_ZZZ+1; | ||
| SIGS[i].val = sigs[i]; | ||
| memset(&PKS[i], 0, sizeof(PKS[i])); | ||
| PKS[i].max = G2LEN; | ||
| PKS[i].len = G2LEN; | ||
| PKS[i].val = pks[i]; | ||
| BLS_ZZZ_KEY_PAIR_GENERATE(NULL,&Y[i],&PKS[i]); | ||
| BLS_ZZZ_SIGN(&SIGS[i],message,&Y[i]); | ||
| } | ||
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| for(int i=0; i<n; i++) | ||
| { | ||
| printf("PKS[%d] ", i); | ||
| OCT_output(&PKS[i]); | ||
| } | ||
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| for(int i=0; i<n; i++) | ||
| { | ||
| printf("SIGS[%d] ", i); | ||
| OCT_output(&SIGS[i]); | ||
| } | ||
| printf("\n\n"); | ||
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| // Recover BLS signature | ||
| rc = BLS_ZZZ_RECOVER_SIGNATURE(k, X, SIGS, &SIGR); | ||
| if (rc!=BLS_OK) | ||
| { | ||
| printf("Error: BLS_ZZZ_RECOVER_SIGNATURE\n"); | ||
| return 1; | ||
| } | ||
| printf("SIGR: "); | ||
| OCT_output(&SIGR); | ||
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| if (!OCT_comp(&SIGR,&SIGI)) | ||
| { | ||
| printf("FAILURE SIGR != SIGI"); | ||
| return 1; | ||
| } | ||
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| return 0; | ||
| } | ||
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| int main() | ||
| { | ||
| #ifdef DEBUG | ||
| printf("%d bit build\n",CHUNK); | ||
| #endif | ||
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| char* seedHex = "78d0fb6705ce77dee47d03eb5b9c5d30"; | ||
| char seed[16] = {0}; | ||
| octet SEED = {sizeof(seed),sizeof(seed),seed}; | ||
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| // CSPRNG | ||
| csprng RNG; | ||
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| // fake random source | ||
| OCT_fromHex(&SEED,seedHex); | ||
| printf("SEED: "); | ||
| OCT_output(&SEED); | ||
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| // initialise strong RNG | ||
| CREATE_CSPRNG(&RNG,&SEED); | ||
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| printf("\nBLS SSS example for curve ZZZ\n"); | ||
| bls_sss(&RNG); | ||
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| KILL_CSPRNG(&RNG); | ||
| } | ||
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