1 files changed, 1 insertions, 63 deletions

diff --git a/sand-leek.c b/sand-leek.c
index 94018a1..8de21fc 100644
--- a/sand-leek.c
+++ b/sand-leek.c
@@ -7,13 +7,13 @@
 #include <errno.h>
 #include <string.h>
 #include <endian.h>
-#include <openssl/bn.h>
 #include <openssl/rsa.h>
 #include <openssl/sha.h>
 #include <openssl/pem.h>
 #include <openssl/err.h>
 
 #include "onion_base32.h"
+#include "key_update.h"
 
 #define VERSION "0.5"
 
@@ -40,68 +40,6 @@ static unsigned char search_raw[10];
 static size_t search_len;
 sem_t working;
 
-/* re-calculate the decryption key `d` for the given key
- * the product of e and d must be congruent to 1, and since we are messing
- * with e to generate our keys, we must re-calculate d */
-int
-key_update_d(RSA *rsa_key) {
-	const BIGNUM *p = NULL;
-	const BIGNUM *q = NULL;
-	const BIGNUM *d = NULL;
-	const BIGNUM *e = NULL;
-	BIGNUM *gcd = BN_secure_new();
-	BIGNUM *p1 = BN_secure_new();
-	BIGNUM *q1 = BN_secure_new();
-	BIGNUM *p1q1 = BN_secure_new();
-	BIGNUM *lambda_n = BN_secure_new();
-	BIGNUM *true_d = BN_secure_new();
-	BIGNUM *true_dmp1 = BN_secure_new();
-	BIGNUM *true_dmq1 = BN_secure_new();
-	BIGNUM *true_iqmp = BN_secure_new();
-	BN_CTX *bn_ctx = BN_CTX_secure_new();
-
-	if (!(bn_ctx && gcd && p1 && q1 && p1q1 && lambda_n && true_d &&
-	    true_dmp1 && true_dmq1 && true_iqmp)) {
-		perror("bignum or bignum context allocation");
-		return 1;
-	}
-
-	RSA_get0_key(rsa_key, NULL, &e, &d);
-	RSA_get0_factors(rsa_key, &p, &q);
-
-	/* calculate p-1 and q-1 and their product */
-	BN_sub(p1, p, BN_value_one());
-	BN_sub(q1, q, BN_value_one());
-	BN_mul(p1q1, p1, q1, bn_ctx);
-
-	/* calculate LCM of p1,q1 with p1*q1/gcd(p1,q1) */
-	BN_gcd(gcd, p1, q1, bn_ctx);
-	BN_div(lambda_n, NULL, p1q1, gcd, bn_ctx);
-
-	BN_mod_inverse(true_d, e, lambda_n, bn_ctx);
-	BN_mod_inverse(true_iqmp, q, p, bn_ctx);
-	BN_mod(true_dmp1, true_d, p1, bn_ctx);
-	BN_mod(true_dmq1, true_d, q1, bn_ctx);
-
-	/* cleanup BN structs not managed by RSA internal functions */
-	BN_clear_free(gcd);
-	BN_clear_free(p1);
-	BN_clear_free(q1);
-	BN_clear_free(p1q1);
-	BN_clear_free(lambda_n);
-	BN_CTX_free(bn_ctx);
-
-	if (!RSA_set0_key(rsa_key, NULL, NULL, true_d)) {
-		fprintf(stderr, "setting d failed\n");
-		return 1;
-	}
-	if (!RSA_set0_crt_params(rsa_key, true_dmp1, true_dmq1, true_iqmp)) {
-		fprintf(stderr, "setting crt params failed\n");
-		return 1;
-	}
-	return 0;
-}
-
 void*
 work(void *arg) {
 	char onion[17];