int main(int argc, const char **argv) { EC_KEY *pub; char workbuf[BUFSIZE]; const unsigned char *workbuf_p; size_t len, i; if (argv[1] == NULL) { fprintf(stderr, "usage: %s [base64key]\n", argv[0]); return EXIT_FAILURE; } memset(workbuf, '\0', sizeof workbuf); pub = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); EC_KEY_set_conv_form(pub, POINT_CONVERSION_COMPRESSED); len = base64_decode(argv[1], workbuf, BUFSIZE); workbuf_p = (unsigned char *) workbuf; o2i_ECPublicKey(&pub, &workbuf_p, len); if (!EC_KEY_check_key(pub)) { fprintf(stderr, "Key data provided on commandline is inconsistent.\n"); return EXIT_FAILURE; } printf("Public key (reassembled):\n"); EC_KEY_print_fp(stdout, pub, 4); return EXIT_SUCCESS; }
int main(int argc, const char **argv) { if (! libathemecore_early_init()) return EXIT_FAILURE; BIO *out; EC_KEY *prv; unsigned char *workbuf, *workbuf_p; char encbuf[BUFSIZE]; size_t len; memset(encbuf, '\0', sizeof encbuf); prv = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); EC_KEY_set_conv_form(prv, POINT_CONVERSION_COMPRESSED); EC_KEY_generate_key(prv); len = i2o_ECPublicKey(prv, NULL); workbuf = mowgli_alloc(len); workbuf_p = workbuf; i2o_ECPublicKey(prv, &workbuf_p); workbuf_p = workbuf; if (base64_encode(workbuf_p, len, encbuf, sizeof encbuf) == (size_t) -1) { fprintf(stderr, "Failed to encode public key!\n"); return EXIT_FAILURE; } printf("Keypair:\n"); EC_KEY_print_fp(stdout, prv, 4); printf("Private key:\n"); out = BIO_new_fp(stdout, 0); PEM_write_bio_ECPrivateKey(out, prv, NULL, NULL, 0, NULL, NULL); printf("Public key (atheme format):\n"); printf("%s\n", encbuf); return EXIT_SUCCESS; }