rsa_test.tc

rsa_test.tc — verify the rsaEncrypt syscall (RSA PKCS#1 v1.5) end-to-end.

Source on GitHub

// rsa_test.tc — verify the rsaEncrypt syscall (RSA PKCS#1 v1.5) end-to-end.
// Encrypts a known string with a throwaway pubkey; writes the hex to /rsa_out.txt.
// Decrypt that hex on the Mac with /tmp/rsa_test_priv.pem → must equal the plaintext.
// Console: RSA  (run + report length) · RSA d (dump hex tail)

#define N_B64 "1cR1ao2h1y4BO-Bbh2R6jyvaKqVj-OR9tYbHH913Y9MB2F8yu_XK5HOlqT25OCdPnMGp6sZ3nD7ogDfRG-YfZXsRibK-TfuQSiZ-xcjplWoHORqeHBjne1jLX1fcwmhGRC_BMCl8432ZXgdL8QCWK2MK1kIWsZ5XW7wKnF-SiIpGGQ23-ENY246mZsLa_S0tJZvZEWgjnlR6VsvISRtxPG00eBsis-2iu1URALpNS21i4p7eFr78CsC69AWILMP_j2X8SN6OFV9-rAXEqbWfMOVaQgq2wIiA_BYoSr1dKq822m-jtj78rhLkIvPvVXk0jKusxMy_E_7njajcdJPJlw"
#define E_B64 "AQAB"

char out[600]; char pt[24]; int hexlen = -9;

void doTest() {
    strcpy(pt, "TinyC-RSA-OK-42");
    hexlen = rsaEncrypt(N_B64, E_B64, pt, out);
    if (hexlen > 0) {
        int f = fileOpen("/rsa_out.txt", "w");
        if (f >= 0) { fileWrite(f, out, hexlen); fileClose(f); }
    }
    addLog("RSA: pt=%s hexlen=%d", pt, hexlen);
}

void TaskLoop() { delay(3000); doTest(); while (1) { delay(1000); } }

void Command(char cmd[]) {
    int i = 0; while (cmd[i] == ' ') { i = i + 1; }
    if (cmd[i] == 'r') { doTest(); responseCmnd("ran"); return; }
    char r[120]; char tail[40]; int L = hexlen; if (L < 0) { L = 0; }
    int s = L - 32; if (s < 0) { s = 0; }
    strSub(tail, out, s, 32);
    sprintf(r, "hexlen=%d pt=%s tail=%s", hexlen, pt, tail);
    responseCmnd(r);
}

int main() { addCommand("RSA"); addLog("rsa_test ready"); return 0; }