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return void where possible and pass references to indicate that a NULL result is impossible

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This commit is contained in:
ssadler
2020-05-07 22:32:59 -03:00
committed by Duke Leto
parent 2324e8ca4b
commit eabcce62f7
11 changed files with 27 additions and 47 deletions
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5
src/cryptoconditions/src/anon.c
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@@ -53,11 +53,8 @@ static void anonToJSON(const CC *cond, cJSON *params) {
}
static unsigned char *anonFingerprint(const CC *cond) {
unsigned char *out = calloc(1, 32);
//fprintf(stderr,"anon fingerprint %p %p\n",out,cond->fingerprint);
static void anonFingerprint(const CC *cond, uint8_t *out) {
memcpy(out, cond->fingerprint, 32);
return out;
}

16
src/cryptoconditions/src/cryptoconditions.c
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@@ -65,8 +65,8 @@ void appendUriSubtypes(uint32_t mask, unsigned char *buf) {
char *cc_conditionUri(const CC *cond) {
unsigned char *fp = cond->type->fingerprint(cond);
if (!fp) return NULL;
unsigned char *fp = calloc(1, 32);
cond->type->fingerprint(cond, fp);
unsigned char *encoded = base64_encode(fp, 32);
@@ -117,9 +117,8 @@ uint32_t fromAsnSubtypes(const ConditionTypes_t types) {
size_t cc_conditionBinary(const CC *cond, unsigned char *buf) {
Condition_t *asn = calloc(1, sizeof(Condition_t));
bool r = asnCondition(cond, asn);
asnCondition(cond, asn);
size_t out = 0;
if (!r) goto end;
asn_enc_rval_t rc = der_encode_to_buffer(&asn_DEF_Condition, asn, buf, 1000);
if (rc.encoded == -1) goto end;
out = rc.encoded;
@@ -141,7 +140,7 @@ size_t cc_fulfillmentBinary(const CC *cond, unsigned char *buf, size_t length) {
}
bool asnCondition(const CC *cond, Condition_t *asn) {
void asnCondition(const CC *cond, Condition_t *asn) {
asn->present = cc_isAnon(cond) ? cond->conditionType->asnType : cond->type->asnType;
// This may look a little weird - we dont have a reference here to the correct
@@ -150,13 +149,10 @@ bool asnCondition(const CC *cond, Condition_t *asn) {
CompoundSha256Condition_t *choice = &asn->choice.thresholdSha256;
choice->cost = cc_getCost(cond);
choice->fingerprint.buf = cond->type->fingerprint(cond);
if (choice->fingerprint.buf == 0) {
return 0;
}
choice->fingerprint.size = 32;
choice->fingerprint.buf = calloc(1, 32);
cond->type->fingerprint(cond, choice->fingerprint.buf);
choice->subtypes = asnSubtypes(cond->type->getSubtypes(cond));
return 1;
}

5
src/cryptoconditions/src/ed25519.c
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@@ -25,11 +25,10 @@
struct CCType CC_Ed25519Type;
static unsigned char *ed25519Fingerprint(const CC *cond) {
static void ed25519Fingerprint(const CC *cond, uint8_t *out) {
Ed25519FingerprintContents_t *fp = calloc(1, sizeof(Ed25519FingerprintContents_t));
//fprintf(stderr,"ed25519 fingerprint %p %p\n",fp,cond->publicKey);
OCTET_STRING_fromBuf(&fp->publicKey, cond->publicKey, 32);
return hashFingerprintContents(&asn_DEF_Ed25519FingerprintContents, fp);
hashFingerprintContents(&asn_DEF_Ed25519FingerprintContents, fp, out);
}

9
src/cryptoconditions/src/eval.c
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@@ -25,11 +25,8 @@
struct CCType CC_EvalType;
static unsigned char *evalFingerprint(const CC *cond) {
unsigned char *hash = calloc(1, 32);
//fprintf(stderr,"evalfingerprint %p %p\n",hash,cond->code);
sha256(cond->code, cond->codeLength, hash);
return hash;
static void evalFingerprint(const CC *cond, uint8_t *out) {
sha256(cond->code, cond->codeLength, out);
}
@@ -105,7 +102,7 @@ static uint32_t evalSubtypes(const CC *cond) {
*/
int jsonVerifyEval(CC *cond, void *context) {
if (cond->codeLength == 5 && 0 == memcmp(cond->code, "TEST", 4)) {
return cond->code[5];
return cond->code[4];
}
fprintf(stderr, "Cannot verify eval; user function unknown\n");
return 0;

2
src/cryptoconditions/src/include/secp256k1/src/ecmult_const.h
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@@ -36,4 +36,4 @@ static void secp256k1_ecmult_const(secp256k1_gej *r, const secp256k1_ge *a, cons
#endif
#endif

6
src/cryptoconditions/src/internal.h
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@@ -41,7 +41,7 @@ typedef struct CCType {
char name[100];
Condition_PR asnType;
int (*visitChildren)(CC *cond, CCVisitor visitor);
unsigned char *(*fingerprint)(const CC *cond);
void (*fingerprint)(const CC *cond, uint8_t *fp);
unsigned long (*getCost)(const CC *cond);
uint32_t (*getSubtypes)(const CC *cond);
CC *(*fromJSON)(const cJSON *params, char *err);
@@ -65,7 +65,7 @@ extern int CCTypeRegistryLength;
*/
uint32_t fromAsnSubtypes(ConditionTypes_t types);
CC *mkAnon(const Condition_t *asnCond);
bool asnCondition(const CC *cond, Condition_t *asn);
void asnCondition(const CC *cond, Condition_t *asn);
Condition_t *asnConditionNew(const CC *cond);
Fulfillment_t *asnFulfillmentNew(const CC *cond);
struct CC *fulfillmentToCC(Fulfillment_t *ffill);
@@ -77,7 +77,7 @@ struct CCType *getTypeByAsnEnum(Condition_PR present);
*/
unsigned char *base64_encode(const unsigned char *data, size_t input_length);
unsigned char *base64_decode(const unsigned char *data_, size_t *output_length);
unsigned char *hashFingerprintContents(asn_TYPE_descriptor_t *asnType, void *fp);
void hashFingerprintContents(asn_TYPE_descriptor_t *asnType, void *fp, uint8_t* out);
void dumpStr(unsigned char *str, size_t len);
int checkString(const cJSON *value, char *key, char *err);
int checkDecodeBase64(const cJSON *value, char *key, char *err, unsigned char **data, size_t *size);

7
src/cryptoconditions/src/prefix.c
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@@ -37,13 +37,12 @@ static int prefixVisitChildren(CC *cond, CCVisitor visitor) {
}
static unsigned char *prefixFingerprint(const CC *cond) {
static void prefixFingerprint(const CC *cond, uint8_t *out) {
PrefixFingerprintContents_t *fp = calloc(1, sizeof(PrefixFingerprintContents_t));
//fprintf(stderr,"prefixfinger %p %p\n",fp,cond->prefix);
asnCondition(cond->subcondition, &fp->subcondition); // TODO: check asnCondition for safety
asnCondition(cond->subcondition, &fp->subcondition);
fp->maxMessageLength = cond->maxMessageLength;
OCTET_STRING_fromBuf(&fp->prefix, cond->prefix, cond->prefixLength);
return hashFingerprintContents(&asn_DEF_PrefixFingerprintContents, fp);
hashFingerprintContents(&asn_DEF_PrefixFingerprintContents, fp, out);
}

7
src/cryptoconditions/src/preimage.c
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@@ -44,11 +44,8 @@ static unsigned long preimageCost(const CC *cond) {
}
static unsigned char *preimageFingerprint(const CC *cond) {
unsigned char *hash = calloc(1, 32);
//fprintf(stderr,"preimage %p %p\n",hash,cond->preimage);
sha256(cond->preimage, cond->preimageLength, hash);
return hash;
static void preimageFingerprint(const CC *cond, uint8_t *out) {
sha256(cond->preimage, cond->preimageLength, out);
}

5
src/cryptoconditions/src/secp256k1.c
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@@ -88,11 +88,10 @@ void initVerify() {
}
static unsigned char *secp256k1Fingerprint(const CC *cond) {
static void secp256k1Fingerprint(const CC *cond, uint8_t *out) {
Secp256k1FingerprintContents_t *fp = calloc(1, sizeof(Secp256k1FingerprintContents_t));
//fprintf(stderr,"secpfinger %p %p size %d vs %d\n",fp,cond->publicKey,(int32_t)sizeof(Secp256k1FingerprintContents_t),(int32_t)SECP256K1_PK_SIZE);
OCTET_STRING_fromBuf(&fp->publicKey, cond->publicKey, SECP256K1_PK_SIZE);
return hashFingerprintContents(&asn_DEF_Secp256k1FingerprintContents, fp);
hashFingerprintContents(&asn_DEF_Secp256k1FingerprintContents, fp, out);
}

6
src/cryptoconditions/src/threshold.c
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@@ -94,17 +94,15 @@ static int cmpConditionBin(const void *a, const void *b) {
}
static unsigned char *thresholdFingerprint(const CC *cond) {
/* Create fingerprint */
static void thresholdFingerprint(const CC *cond, uint8_t *out) {
ThresholdFingerprintContents_t *fp = calloc(1, sizeof(ThresholdFingerprintContents_t));
//fprintf(stderr,"thresholdfinger %p\n",fp);
fp->threshold = cond->threshold;
for (int i=0; i<cond->size; i++) {
Condition_t *asnCond = asnConditionNew(cond->subconditions[i]);
asn_set_add(&fp->subconditions2, asnCond);
}
qsort(fp->subconditions2.list.array, cond->size, sizeof(Condition_t*), cmpConditionBin);
return hashFingerprintContents(&asn_DEF_ThresholdFingerprintContents, fp);
hashFingerprintContents(&asn_DEF_ThresholdFingerprintContents, fp, out);
}

6
src/cryptoconditions/src/utils.c
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@@ -210,7 +210,7 @@ void jsonAddBase64(cJSON *params, char *key, unsigned char *bin, size_t size) {
}
unsigned char *hashFingerprintContents(asn_TYPE_descriptor_t *asnType, void *fp) {
void hashFingerprintContents(asn_TYPE_descriptor_t *asnType, void *fp, uint8_t *out) {
unsigned char buf[BUF_SIZE];
asn_enc_rval_t rc = der_encode_to_buffer(asnType, fp, buf, BUF_SIZE);
ASN_STRUCT_FREE(*asnType, fp);
@@ -218,9 +218,7 @@ unsigned char *hashFingerprintContents(asn_TYPE_descriptor_t *asnType, void *fp)
fprintf(stderr, "Encoding fingerprint failed\n");
return 0;
}
unsigned char *hash = calloc(1,32);
sha256(buf, rc.encoded, hash);
return hash;
sha256(buf, rc.encoded, out);
}