--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/pk/rsa/rsa_set.c	Fri Feb 09 21:44:05 2018 +0800
@@ -0,0 +1,134 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+
+#ifdef LTC_MRSA
+
+/**
+  Import RSA key from raw numbers
+
+  @param N       RSA's N
+  @param Nlen    RSA's N's length
+  @param e       RSA's e
+  @param elen    RSA's e's length
+  @param d       RSA's d  (only private key, NULL for public key)
+  @param dlen    RSA's d's length
+  @param key     [out] the destination for the imported key
+  @return CRYPT_OK if successful
+*/
+int rsa_set_key(const unsigned char *N,  unsigned long Nlen,
+                const unsigned char *e,  unsigned long elen,
+                const unsigned char *d,  unsigned long dlen,
+                rsa_key *key)
+{
+   int err;
+
+   LTC_ARGCHK(key         != NULL);
+   LTC_ARGCHK(N           != NULL);
+   LTC_ARGCHK(e           != NULL);
+   LTC_ARGCHK(ltc_mp.name != NULL);
+
+   err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ, &key->dP, &key->qP, &key->p, &key->q, NULL);
+   if (err != CRYPT_OK) return err;
+
+   if ((err = mp_read_unsigned_bin(key->N , (unsigned char *)N , Nlen)) != CRYPT_OK)    { goto LBL_ERR; }
+   if ((err = mp_read_unsigned_bin(key->e , (unsigned char *)e , elen)) != CRYPT_OK)    { goto LBL_ERR; }
+   if (d && dlen) {
+      if ((err = mp_read_unsigned_bin(key->d , (unsigned char *)d , dlen)) != CRYPT_OK) { goto LBL_ERR; }
+      key->type = PK_PRIVATE;
+   }
+   else {
+      key->type = PK_PUBLIC;
+   }
+   return CRYPT_OK;
+
+LBL_ERR:
+   rsa_free(key);
+   return err;
+}
+
+/**
+  Import factors of an RSA key from raw numbers
+
+  Only for private keys.
+
+  @param p       RSA's p
+  @param plen    RSA's p's length
+  @param q       RSA's q
+  @param qlen    RSA's q's length
+  @param key     [out] the destination for the imported key
+  @return CRYPT_OK if successful
+*/
+int rsa_set_factors(const unsigned char *p,  unsigned long plen,
+                    const unsigned char *q,  unsigned long qlen,
+                    rsa_key *key)
+{
+   int err;
+
+   LTC_ARGCHK(key         != NULL);
+   LTC_ARGCHK(p           != NULL);
+   LTC_ARGCHK(q           != NULL);
+   LTC_ARGCHK(ltc_mp.name != NULL);
+
+   if (key->type != PK_PRIVATE) return CRYPT_PK_TYPE_MISMATCH;
+
+   if ((err = mp_read_unsigned_bin(key->p , (unsigned char *)p , plen)) != CRYPT_OK) { goto LBL_ERR; }
+   if ((err = mp_read_unsigned_bin(key->q , (unsigned char *)q , qlen)) != CRYPT_OK) { goto LBL_ERR; }
+   return CRYPT_OK;
+
+LBL_ERR:
+   rsa_free(key);
+   return err;
+}
+
+/**
+  Import CRT parameters of an RSA key from raw numbers
+
+  Only for private keys.
+
+  @param dP      RSA's dP
+  @param dPlen   RSA's dP's length
+  @param dQ      RSA's dQ
+  @param dQlen   RSA's dQ's length
+  @param qP      RSA's qP
+  @param qPlen   RSA's qP's length
+  @param key     [out] the destination for the imported key
+  @return CRYPT_OK if successful
+*/
+int rsa_set_crt_params(const unsigned char *dP, unsigned long dPlen,
+                       const unsigned char *dQ, unsigned long dQlen,
+                       const unsigned char *qP, unsigned long qPlen,
+                       rsa_key *key)
+{
+   int err;
+
+   LTC_ARGCHK(key         != NULL);
+   LTC_ARGCHK(dP          != NULL);
+   LTC_ARGCHK(dQ          != NULL);
+   LTC_ARGCHK(qP          != NULL);
+   LTC_ARGCHK(ltc_mp.name != NULL);
+
+   if (key->type != PK_PRIVATE) return CRYPT_PK_TYPE_MISMATCH;
+
+   if ((err = mp_read_unsigned_bin(key->dP, (unsigned char *)dP, dPlen)) != CRYPT_OK) { goto LBL_ERR; }
+   if ((err = mp_read_unsigned_bin(key->dQ, (unsigned char *)dQ, dQlen)) != CRYPT_OK) { goto LBL_ERR; }
+   if ((err = mp_read_unsigned_bin(key->qP, (unsigned char *)qP, qPlen)) != CRYPT_OK) { goto LBL_ERR; }
+   return CRYPT_OK;
+
+LBL_ERR:
+   rsa_free(key);
+   return err;
+}
+
+#endif /* LTC_MRSA */
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */