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Merge pull request #4 from cheatfate/master

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Fix crashes, add secp256k1_ecdh definition
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Mamy Ratsimbazafy 2018-03-16 17:10:55 +01:00 committed by GitHub
commit 81cda1ab6f
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2 changed files with 44 additions and 7 deletions
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20
secp256k1.nim
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@ -24,7 +24,8 @@ type
secp256k1_nonce_function* = proc (nonce32: ptr cuchar; msg32: ptr cuchar; secp256k1_nonce_function* = proc (nonce32: ptr cuchar; msg32: ptr cuchar;
key32: ptr cuchar; algo16: ptr cuchar; data: pointer; key32: ptr cuchar; algo16: ptr cuchar; data: pointer;
attempt: cuint): cint attempt: cuint): cint {.stdcall.}
secp256k1_error_function* = proc (message: cstring; data: pointer) {.stdcall.}
secp256k1_context* = object secp256k1_context* = object
secp256k1_scratch_space* = object secp256k1_scratch_space* = object
@ -69,12 +70,12 @@ proc secp256k1_context_destroy*(
proc secp256k1_context_set_illegal_callback*( proc secp256k1_context_set_illegal_callback*(
ctx: ptr secp256k1_context; ctx: ptr secp256k1_context;
fun: proc (message: cstring; data: pointer); fun: secp256k1_error_function;
data: pointer) {.secp.} data: pointer) {.secp.}
proc secp256k1_context_set_error_callback*( proc secp256k1_context_set_error_callback*(
ctx: ptr secp256k1_context; ctx: ptr secp256k1_context;
fun: proc (message: cstring; data: pointer); fun: secp256k1_error_function;
data: pointer) {.secp.} data: pointer) {.secp.}
proc secp256k1_scratch_space_create*( proc secp256k1_scratch_space_create*(
@ -253,3 +254,16 @@ proc secp256k1_ecdsa_recoverable_signature_serialize_compact*(
## recid: a pointer to an integer to hold the recovery id (can be NULL). ## recid: a pointer to an integer to hold the recovery id (can be NULL).
## In: sig: a pointer to an initialized signature object (cannot be NULL) ## In: sig: a pointer to an initialized signature object (cannot be NULL)
## ##
proc secp256k1_ecdh*(ctx: ptr secp256k1_context; output32: ptr cuchar;
pubkey: ptr secp256k1_pubkey;
input32: ptr cuchar): cint {.secp.}
## Compute an EC Diffie-Hellman secret in constant time
## Returns: 1: exponentiation was successful
## 0: scalar was invalid (zero or overflow)
## Args: ctx: pointer to a context object (cannot be NULL)
## Out: result: a 32-byte array which will be populated by an ECDH
## secret computed from the point and scalar
## In: pubkey: a pointer to a secp256k1_pubkey containing an
## initialized public key
## privkey: a 32-byte scalar with which to multiply the point

31
tests/test1.nim
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@ -1,7 +1,30 @@
import secp256k1, unittest import secp256k1, unittest
suite "Test1": suite "Test1":
test "Context should be created and destroyed": test "Context should be created and destroyed":
let ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN or SECP256K1_CONTEXT_VERIFY) let ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN or SECP256K1_CONTEXT_VERIFY)
check ctx != nil check ctx != nil
secp256k1_context_destroy(ctx) secp256k1_context_destroy(ctx)
test "ECDHE data should be equal":
var aSecretKey: array[32, uint8]
var bSecretKey: array[32, uint8]
var aPublicKey: secp256k1_pubkey
var bPublicKey: secp256k1_pubkey
var data1: array[32, cuchar]
var data2: array[32, cuchar]
aSecretKey[31] = 1'u8
bSecretKey[31] = 2'u8
let ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN)
check ctx != nil
check secp256k1_ec_pubkey_create(ctx, addr aPublicKey,
cast[ptr cuchar](addr aSecretKey[0])) == 1
check secp256k1_ec_pubkey_create(ctx, addr bPublicKey,
cast[ptr cuchar](addr bSecretKey[0])) == 1
check secp256k1_ecdh(ctx, addr data1[0],
addr bPublicKey,
cast[ptr cuchar](addr aSecretKey[0])) == 1
check secp256k1_ecdh(ctx, addr data2[0],
addr aPublicKey,
cast[ptr cuchar](addr bSecretKey[0])) == 1
check(data1 == data2)