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Add parsing for session

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This commit is contained in:
jl777
2019-02-21 22:03:15 -11:00
parent 3bc10962e5
commit d84a9afe6f
1 changed files with 46 additions and 18 deletions
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64
src/cc/musig.cpp
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@@ -223,6 +223,27 @@ UniValue musig_calcmsg(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
} else return(cclib_error(result,"couldnt parse params"));
}
int32_t musig_parsepubkey(secp256k1_context *ctx,secp256k1_pubkey &spk,cJSON *item)
{
char *hexstr;
if ( (hexstr= jstr(item,0)) != 0 && is_hexstr(hexstr,0) == 66 )
{
CPubKey pk(ParseHex(hexstr));
if ( secp256k1_ec_pubkey_parse(ctx,&spk,pk.begin(),33) > 0 )
return(1);
} else return(-1);
}
int32_t musig_parsehash32(uint8_t *hash32,cJSON *item)
{
char *hexstr;
if ( (hexstr= jstr(item,0)) != 0 && is_hexstr(hexstr,0) == 64 )
{
decode_hex(hash32,32,hexstr);
return(0);
} else return(-1);
}
UniValue musig_combine(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
{
static secp256k1_context *ctx;
@@ -235,13 +256,9 @@ UniValue musig_combine(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
//fprintf(stderr,"n.%d args.(%s)\n",n,jprint(params,0));
for (i=0; i<n; i++)
{
if ( (hexstr= jstr(jitem(params,i),0)) != 0 && is_hexstr(hexstr,0) == 66 )
{
CPubKey pk(ParseHex(hexstr));
if ( secp256k1_ec_pubkey_parse(ctx,&spk,pk.begin(),33) > 0 )
pubkeys.push_back(spk);
else return(cclib_error(result,"error parsing pk"));
} else return(cclib_error(result,"all pubkeys must be 33 bytes hexdata"));
if ( musig_parsepubkey(ctx,spk,jitem(params,i)) < 0 )
return(cclib_error(result,"error parsing pk"));
pubkeys.push_back(spk);
}
if ( secp256k1_musig_pubkey_combine(ctx,NULL,&combined_pk,pkhash,&pubkeys[0],n) > 0 )
{
@@ -271,21 +288,26 @@ UniValue musig_session(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
if ( params != 0 && (n= cJSON_GetArraySize(params)) == 5 )
{
// set the 5 args: myind, num, pub33, pkhash32, msg32
myind = juint(jitem(params,0),0);
num = juint(jitem(params,1),0);
if ( myind < 0 || myind >= num || num <= 0 )
return(cclib_error(result,"illegal myindex and numsigners"));
if ( MUSIG != 0 )
musig_infofree(MUSIG), MUSIG = 0;
MUSIG = musig_infocreate(myind,num);
pk = buf2pk(pub33);
GetRandBytes(session,32);
for (i=0; i<32; i++)
sprintf(&str[i<<1],"%02x",session[i]);
str[64] = 0;
fprintf(stderr,"session %s\n",str);
if ( secp256k1_ec_pubkey_parse(ctx,&MUSIG->combined_pk,pk.begin(),33) > 0 )
if ( musig_parsepubkey(ctx,MUSIG->combined_pk,jitem(params,2)) < 0 )
return(cclib_error(result,"error parsing combined_pubkey"));
{
memcpy(MUSIG->pkhash,pkhash,sizeof(pkhash));
memcpy(MUSIG->msg,msg,sizeof(msg));
if ( musig_parsehash32(MUSIG->pkhash,jitem(params,3)) < 0 )
return(cclib_error(result,"error parsing pkhash"));
if ( musig_parsehash32(MUSIG->msg,jitem(params,4)) < 0 )
return(cclib_error(result,"error parsing msg"));
Myprivkey(privkey);
GetRandBytes(session,32);
for (i=0; i<32; i++)
sprintf(&str[i<<1],"%02x",session[i]);
str[64] = 0;
fprintf(stderr,"session %s\n",str);
/** Initializes a signing session for a signer
*
* Returns: 1: session is successfully initialized
@@ -314,6 +336,7 @@ UniValue musig_session(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
*/
if ( secp256k1_musig_session_initialize(ctx,&MUSIG->musig_session,MUSIG->signer_data, &MUSIG->nonce_commitments[MUSIG->myind * 32],session,MUSIG->msg,&MUSIG->combined_pk,MUSIG->pkhash,MUSIG->num,MUSIG->myind,privkey) > 0 )
{
memset(session,0,sizeof(session));
result.push_back(Pair("myind",(int64_t)myind));
result.push_back(Pair("numsigners",(int64_t)num));
for (i=0; i<32; i++)
@@ -322,7 +345,12 @@ UniValue musig_session(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
result.push_back(Pair("commitment",str));
result.push_back(Pair("result","success"));
return(result);
} else return(cclib_error(result,"couldnt initialize session"));
}
else
{
memset(session,0,sizeof(session));
return(cclib_error(result,"couldnt initialize session"));
}
} else return(cclib_error(result,"couldnt parse combined pubkey"));
} else return(cclib_error(result,"wrong number of params, need 5: myindex, numsigners, combined_pk, pkhash, msg32"));
}