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Split up signing and verification initialization

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This commit is contained in:
Pieter Wuille
2014-09-08 23:09:06 +02:00
parent da556eb772
commit 04e34d18c3
5 changed files with 61 additions and 10 deletions
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12
include/secp256k1.h
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@@ -5,12 +5,16 @@
extern "C" {
#endif
/** Flags to pass to secp256k1_start. */
#define SECP256K1_START_VERIFY (1 << 0)
#define SECP256K1_START_SIGN (1 << 1)
/** Initialize the library. This may take some time (10-100 ms).
* You need to call this before calling any other function.
* It cannot run in parallel with any other functions, but once
* secp256k1_start() returns, all other functions are thread-safe.
*/
void secp256k1_start(void);
void secp256k1_start(unsigned int flags);
/** Free all memory associated with this library. After this, no
* functions can be called anymore, except secp256k1_start()
@@ -22,6 +26,7 @@ void secp256k1_stop(void);
* 0: incorrect signature
* -1: invalid public key
* -2: invalid signature
* Requires starting using SECP256K1_START_VERIFY.
*/
int secp256k1_ecdsa_verify(const unsigned char *msg, int msglen,
const unsigned char *sig, int siglen,
@@ -36,6 +41,7 @@ int secp256k1_ecdsa_verify(const unsigned char *msg, int msglen,
* nonce: pointer to a 32-byte nonce (generated with a cryptographic PRNG)
* Out: sig: pointer to a 72-byte array where the signature will be placed.
* siglen: pointer to an int, which will be updated to the signature length (<=72).
* Requires starting using SECP256K1_START_SIGN.
*/
int secp256k1_ecdsa_sign(const unsigned char *msg, int msglen,
unsigned char *sig, int *siglen,
@@ -51,6 +57,7 @@ int secp256k1_ecdsa_sign(const unsigned char *msg, int msglen,
* nonce: pointer to a 32-byte nonce (generated with a cryptographic PRNG)
* Out: sig: pointer to a 64-byte array where the signature will be placed.
* recid: pointer to an int, which will be updated to contain the recovery id.
* Requires starting using SECP256K1_START_SIGN.
*/
int secp256k1_ecdsa_sign_compact(const unsigned char *msg, int msglen,
unsigned char *sig64,
@@ -68,8 +75,8 @@ int secp256k1_ecdsa_sign_compact(const unsigned char *msg, int msglen,
* recid: the recovery id (as returned by ecdsa_sign_compact)
* Out: pubkey: pointer to a 33 or 65 byte array to put the pubkey.
* pubkeylen: pointer to an int that will contain the pubkey length.
* Requires starting using SECP256K1_START_VERIFY.
*/
int secp256k1_ecdsa_recover_compact(const unsigned char *msg, int msglen,
const unsigned char *sig64,
unsigned char *pubkey, int *pubkeylen,
@@ -97,6 +104,7 @@ int secp256k1_ecdsa_pubkey_verify(const unsigned char *pubkey, int pubkeylen);
* length.
* Returns: 1: secret was valid, public key stores
* 0: secret was invalid, try again.
* Requires starting using SECP256K1_START_SIGN.
*/
int secp256k1_ecdsa_pubkey_create(unsigned char *pubkey, int *pubkeylen, const unsigned char *seckey, int compressed);