#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include "include/secp256k1.h"

int verify(uint8_t msg[32], uint8_t* sig, uint8_t siglen, uint8_t pubkey[65], uint8_t pubkeylen) {
    secp256k1_context* ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);

    secp256k1_ecdsa_signature signature;
    secp256k1_pubkey publickey;

    if (secp256k1_ecdsa_signature_parse_der(ctx, &signature, sig, siglen) != 1) {
        printf("signature parse failed\n");
        secp256k1_context_destroy(ctx);
        return 0;
    }

    if (secp256k1_ec_pubkey_parse(ctx, &publickey, pubkey, pubkeylen) != 1) {
        printf("pubkey parse failed\n");
        secp256k1_context_destroy(ctx);
        return 0;
    }

    if (secp256k1_ecdsa_verify(ctx, &signature, msg, &publickey) != 1) {
        printf("signature is not valid\n");
        secp256k1_context_destroy(ctx);
        return 0;
    }

    printf("signature is valid\n");
    secp256k1_context_destroy(ctx);
    return 1;
}

int main() {

    uint8_t wycheproof_pubkey[65] = {4, 184, 56, 255, 68, 229, 188, 23, 
                                    123, 242, 17, 137, 208, 118, 96, 130, 
                                    252, 157, 132, 50, 38, 136, 127, 201, 
                                    118, 3, 113, 16, 11, 126, 226, 10, 
                                    111, 240, 201, 215, 91, 251, 167, 179, 
                                    26, 107, 202, 25, 116, 73, 110, 235, 
                                    86, 222, 53, 112, 113, 149, 93, 131, 
                                    196, 177, 186, 218, 160, 178, 24, 50, 233};

    uint8_t wycheproof_msg3[32] = {187, 90, 82, 244, 47, 156, 146, 97, 237, 67, 97, 245, 148, 34, 161, 227, 0, 54, 231, 195, 43, 39, 12, 136, 7, 164, 25, 254, 202, 96, 80, 35};
    uint8_t wycheproof_sig3[71] = {48, 69, 2, 33, 0, 129, 62, 247, 156, 206, 250, 154, 86, 247, 186, 128, 95, 14, 71, 133, 132, 254, 95, 13, 213, 245, 103, 188, 9, 181, 18, 60, 203, 201, 131, 35, 101, 2, 32, 111, 241, 138, 82, 220, 192, 51, 111, 122, 246, 36, 0, 166, 221, 155, 129, 7, 50, 186, 241, 255, 117, 128, 0, 214, 246, 19, 165, 86, 235, 49, 186};

    uint8_t wycheproof_msg218[32] = {115, 0, 0, 0, 0, 33, 63, 42, 82, 92, 96, 53, 114, 82, 53, 194, 246, 150, 173, 62, 187, 94, 228, 127, 20, 6, 151, 173, 37, 119, 13, 145};
    uint8_t wycheproof_sig218[71] = {48, 69, 2, 32, 40, 249, 74, 137, 78, 146, 2, 70, 153, 227, 69, 254, 102, 151, 30, 62, 220, 208, 80, 2, 51, 134, 19, 90, 179, 147, 157, 85, 8, 152, 251, 37, 2, 33, 0, 205, 105, 193, 164, 43, 224, 90, 110, 225, 39, 12, 130, 20, 121, 37, 30, 19, 76, 33, 133, 141, 128, 11, 218, 111, 78, 152, 179, 113, 150, 35, 142};

    int result3;
    int result218;

    result3 = verify(wycheproof_msg3, wycheproof_sig3, sizeof(wycheproof_sig3), wycheproof_pubkey, sizeof(wycheproof_pubkey));
    result218 = verify(wycheproof_msg218, wycheproof_sig218, sizeof(wycheproof_sig218), wycheproof_pubkey, sizeof(wycheproof_pubkey));

    printf("result3 is %d\n", result3);
    printf("result218 is %d\n", result218);
    return 0;
}