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authorJack Grigg <jack@z.cash>2017-10-04 14:41:40 +0100
committerJack Grigg <jack@z.cash>2017-10-04 14:41:40 +0100
commit63179d028347bf3e32c7ea61386df4c44307b4a7 (patch)
tree13f96bb1dc55d166f3a9ec3a43aca14e3e923313 /src/key.cpp
parent1ce9f0a952a3d5d9442ad8251da898d96209c16c (diff)
Scope the ECDSA constant sizes to CPubKey / CKey classes
Diffstat (limited to 'src/key.cpp')
-rw-r--r--src/key.cpp25
1 files changed, 11 insertions, 14 deletions
diff --git a/src/key.cpp b/src/key.cpp
index 42301e81a0..0ddf4e1fc4 100644
--- a/src/key.cpp
+++ b/src/key.cpp
@@ -85,16 +85,13 @@ static int ec_privkey_import_der(const secp256k1_context* ctx, unsigned char *ou
* <http://www.secg.org/sec1-v2.pdf>. The optional parameters and publicKey fields are
* included.
*
- * privkey must point to an output buffer of length at least PRIVATE_KEY_SIZE bytes.
+ * privkey must point to an output buffer of length at least CKey::PRIVATE_KEY_SIZE bytes.
* privkeylen must initially be set to the size of the privkey buffer. Upon return it
* will be set to the number of bytes used in the buffer.
* key32 must point to a 32-byte raw private key.
*/
static int ec_privkey_export_der(const secp256k1_context *ctx, unsigned char *privkey, size_t *privkeylen, const unsigned char *key32, int compressed) {
- assert(*privkeylen >= PRIVATE_KEY_SIZE);
- static_assert(
- PRIVATE_KEY_SIZE >= COMPRESSED_PRIVATE_KEY_SIZE,
- "COMPRESSED_PRIVATE_KEY_SIZE is larger than PRIVATE_KEY_SIZE");
+ assert(*privkeylen >= CKey::PRIVATE_KEY_SIZE);
secp256k1_pubkey pubkey;
size_t pubkeylen = 0;
if (!secp256k1_ec_pubkey_create(ctx, &pubkey, key32)) {
@@ -120,11 +117,11 @@ static int ec_privkey_export_der(const secp256k1_context *ctx, unsigned char *pr
memcpy(ptr, begin, sizeof(begin)); ptr += sizeof(begin);
memcpy(ptr, key32, 32); ptr += 32;
memcpy(ptr, middle, sizeof(middle)); ptr += sizeof(middle);
- pubkeylen = COMPRESSED_PUBLIC_KEY_SIZE;
+ pubkeylen = CPubKey::COMPRESSED_PUBLIC_KEY_SIZE;
secp256k1_ec_pubkey_serialize(ctx, ptr, &pubkeylen, &pubkey, SECP256K1_EC_COMPRESSED);
ptr += pubkeylen;
*privkeylen = ptr - privkey;
- assert(*privkeylen == COMPRESSED_PRIVATE_KEY_SIZE);
+ assert(*privkeylen == CKey::COMPRESSED_PRIVATE_KEY_SIZE);
} else {
static const unsigned char begin[] = {
0x30,0x82,0x01,0x13,0x02,0x01,0x01,0x04,0x20
@@ -146,11 +143,11 @@ static int ec_privkey_export_der(const secp256k1_context *ctx, unsigned char *pr
memcpy(ptr, begin, sizeof(begin)); ptr += sizeof(begin);
memcpy(ptr, key32, 32); ptr += 32;
memcpy(ptr, middle, sizeof(middle)); ptr += sizeof(middle);
- pubkeylen = PUBLIC_KEY_SIZE;
+ pubkeylen = CPubKey::PUBLIC_KEY_SIZE;
secp256k1_ec_pubkey_serialize(ctx, ptr, &pubkeylen, &pubkey, SECP256K1_EC_UNCOMPRESSED);
ptr += pubkeylen;
*privkeylen = ptr - privkey;
- assert(*privkeylen == PRIVATE_KEY_SIZE);
+ assert(*privkeylen == CKey::PRIVATE_KEY_SIZE);
}
return 1;
}
@@ -183,7 +180,7 @@ CPrivKey CKey::GetPrivKey() const {
CPubKey CKey::GetPubKey() const {
assert(fValid);
secp256k1_pubkey pubkey;
- size_t clen = PUBLIC_KEY_SIZE;
+ size_t clen = CPubKey::PUBLIC_KEY_SIZE;
CPubKey result;
int ret = secp256k1_ec_pubkey_create(secp256k1_context_sign, &pubkey, begin());
assert(ret);
@@ -196,8 +193,8 @@ CPubKey CKey::GetPubKey() const {
bool CKey::Sign(const uint256 &hash, std::vector<unsigned char>& vchSig, uint32_t test_case) const {
if (!fValid)
return false;
- vchSig.resize(SIGNATURE_SIZE);
- size_t nSigLen = SIGNATURE_SIZE;
+ vchSig.resize(CPubKey::SIGNATURE_SIZE);
+ size_t nSigLen = CPubKey::SIGNATURE_SIZE;
unsigned char extra_entropy[32] = {0};
WriteLE32(extra_entropy, test_case);
secp256k1_ecdsa_signature sig;
@@ -225,7 +222,7 @@ bool CKey::VerifyPubKey(const CPubKey& pubkey) const {
bool CKey::SignCompact(const uint256 &hash, std::vector<unsigned char>& vchSig) const {
if (!fValid)
return false;
- vchSig.resize(COMPACT_SIGNATURE_SIZE);
+ vchSig.resize(CPubKey::COMPACT_SIGNATURE_SIZE);
int rec = -1;
secp256k1_ecdsa_recoverable_signature sig;
int ret = secp256k1_ecdsa_sign_recoverable(secp256k1_context_sign, &sig, hash.begin(), begin(), secp256k1_nonce_function_rfc6979, NULL);
@@ -255,7 +252,7 @@ bool CKey::Derive(CKey& keyChild, ChainCode &ccChild, unsigned int nChild, const
std::vector<unsigned char, secure_allocator<unsigned char>> vout(64);
if ((nChild >> 31) == 0) {
CPubKey pubkey = GetPubKey();
- assert(pubkey.size() == COMPRESSED_PUBLIC_KEY_SIZE);
+ assert(pubkey.size() == CPubKey::COMPRESSED_PUBLIC_KEY_SIZE);
BIP32Hash(cc, nChild, *pubkey.begin(), pubkey.begin()+1, vout.data());
} else {
assert(size() == 32);