285 |
static void |
static void |
286 |
sec_rsa_encrypt(uint8 * out, uint8 * in, int len, uint8 * modulus, uint8 * exponent) |
sec_rsa_encrypt(uint8 * out, uint8 * in, int len, uint8 * modulus, uint8 * exponent) |
287 |
{ |
{ |
288 |
BN_CTX ctx; |
BN_CTX *ctx; |
289 |
BIGNUM mod, exp, x, y; |
BIGNUM mod, exp, x, y; |
290 |
uint8 inr[SEC_MODULUS_SIZE]; |
uint8 inr[SEC_MODULUS_SIZE]; |
291 |
int outlen; |
int outlen; |
295 |
memcpy(inr, in, len); |
memcpy(inr, in, len); |
296 |
reverse(inr, len); |
reverse(inr, len); |
297 |
|
|
298 |
BN_CTX_init(&ctx); |
ctx = BN_CTX_new(); |
299 |
BN_init(&mod); |
BN_init(&mod); |
300 |
BN_init(&exp); |
BN_init(&exp); |
301 |
BN_init(&x); |
BN_init(&x); |
304 |
BN_bin2bn(modulus, SEC_MODULUS_SIZE, &mod); |
BN_bin2bn(modulus, SEC_MODULUS_SIZE, &mod); |
305 |
BN_bin2bn(exponent, SEC_EXPONENT_SIZE, &exp); |
BN_bin2bn(exponent, SEC_EXPONENT_SIZE, &exp); |
306 |
BN_bin2bn(inr, len, &x); |
BN_bin2bn(inr, len, &x); |
307 |
BN_mod_exp(&y, &x, &exp, &mod, &ctx); |
BN_mod_exp(&y, &x, &exp, &mod, ctx); |
308 |
outlen = BN_bn2bin(&y, out); |
outlen = BN_bn2bin(&y, out); |
309 |
reverse(out, outlen); |
reverse(out, outlen); |
310 |
if (outlen < SEC_MODULUS_SIZE) |
if (outlen < SEC_MODULUS_SIZE) |
314 |
BN_clear_free(&x); |
BN_clear_free(&x); |
315 |
BN_free(&exp); |
BN_free(&exp); |
316 |
BN_free(&mod); |
BN_free(&mod); |
317 |
BN_CTX_free(&ctx); |
BN_CTX_free(ctx); |
318 |
} |
} |
319 |
|
|
320 |
/* Initialise secure transport packet */ |
/* Initialise secure transport packet */ |