小编use*_*607的帖子

我有一个初始化的椭圆曲线(EC_GROUP).有没有办法得到仿射坐标的随机点？

这就是我定义曲线的方式:

BN_CTX *ctx;
EC_GROUP *curve;
BIGNUM *a, *b, *p, *order, *x, *y, *z;
EC_POINT *generator;

/* Binary data for the curve parameters */
unsigned char a_bin[28] =
        {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
        0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFF,0xFF,0xFF,0xFF,
        0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE};
unsigned char b_bin[28] =
        {0xB4,0x05,0x0A,0x85,0x0C,0x04,0xB3,0xAB,0xF5,0x41,
        0x32,0x56,0x50,0x44,0xB0,0xB7,0xD7,0xBF,0xD8,0xBA,
        0x27,0x0B,0x39,0x43,0x23,0x55,0xFF,0xB4};
unsigned char p_bin[28] =
        {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
        0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,
        0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01};
unsigned char order_bin[28] =
        {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
        0xFF,0xFF,0xFF,0xFF,0x16,0xA2,0xE0,0xB8,0xF0,0x3E,
        0x13,0xDD,0x29,0x45,0x5C,0x5C,0x2A,0x3D };
unsigned char x_bin[28] =
        {0xB7,0x0E,0x0C,0xBD,0x6B,0xB4,0xBF,0x7F,0x32,0x13,
        0x90,0xB9,0x4A,0x03,0xC1,0xD3,0x56,0xC2,0x11,0x22,
        0x34,0x32,0x80,0xD6,0x11,0x5C,0x1D,0x21};
unsigned char y_bin[28] =
        {0xbd,0x37,0x63,0x88,0xb5,0xf7,0x23,0xfb,0x4c,0x22,
        0xdf,0xe6,0xcd,0x43,0x75,0xa0,0x5a,0x07,0x47,0x64,
        0x44,0xd5,0x81,0x99,0x85,0x00,0x7e,0x34};

unsigned char z_bin[28] = 
        {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
        0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
        0x0,0x0,0x0};

/* Set up the BN_CTX */ …