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adding rsa_import_radix

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Karel Miko 2017-02-21 12:37:14 +01:00 committed by Steffen Jaeckel
parent 0cf80ef631
commit a2c87f54de
2 changed files with 65 additions and 0 deletions
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1
src/headers/tomcrypt_pk.h
View File

@ -107,6 +107,7 @@ int rsa_sign_saltlen_get_max_ex(int padding, int hash_idx, rsa_key *key);
int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key);
int rsa_import(const unsigned char *in, unsigned long inlen, rsa_key *key);
int rsa_import_radix(int radix, char *N, char *e, char *d, char *p, char *q, char *dP, char *dQ, char *qP, rsa_key *key);
#endif
/* ---- Katja ---- */

64
src/pk/rsa/rsa_import_radix.c Executable file
View File

@ -0,0 +1,64 @@
/* 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.
*
* Tom St Denis, tomstdenis@gmail.com, http://libtom.org
*/
#include "tomcrypt.h"
/**
Import RSA public or private key from raw numbers
@param radix the radix the numbers are represented in (2-64, 16 = hexadecimal)
@param N RSA's N in radix representation
@param e RSA's e in radix representation
@param d RSA's d in radix representation (only private key, NULL for public key)
@param p RSA's p in radix representation (only private key, NULL for public key)
@param q RSA's q in radix representation (only private key, NULL for public key)
@param dP RSA's dP in radix representation (only private key, NULL for public key)
@param dQ RSA's dQ in radix representation (only private key, NULL for public key)
@param qP RSA's qP in radix representation (only private key, NULL for public key)
@param key [out] the destination for the imported key
@return CRYPT_OK if successful, upon error allocated memory is freed
*/
#ifdef LTC_MRSA
int rsa_import_radix(int radix, char *N, char *e, char *d, char *p, char *q, char *dP, char *dQ, char *qP, 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_radix(key->N , N , radix)) != CRYPT_OK) { goto LBL_ERR; }
if ((err = mp_read_radix(key->e , e , radix)) != CRYPT_OK) { goto LBL_ERR; }
if (d && p && q && dP && dQ && qP && strlen(d)>0 && strlen(p)>0 &&
strlen(q)>0 && strlen(dP)>0 && strlen(dQ)>0 && strlen(qP)>0) {
if ((err = mp_read_radix(key->d , d , radix)) != CRYPT_OK) { goto LBL_ERR; }
if ((err = mp_read_radix(key->p , p , radix)) != CRYPT_OK) { goto LBL_ERR; }
if ((err = mp_read_radix(key->q , q , radix)) != CRYPT_OK) { goto LBL_ERR; }
if ((err = mp_read_radix(key->dP, dP, radix)) != CRYPT_OK) { goto LBL_ERR; }
if ((err = mp_read_radix(key->dQ, dQ, radix)) != CRYPT_OK) { goto LBL_ERR; }
if ((err = mp_read_radix(key->qP, qP, radix)) != CRYPT_OK) { goto LBL_ERR; }
key->type = PK_PRIVATE;
}
else {
key->type = PK_PUBLIC;
}
return CRYPT_OK;
LBL_ERR:
mp_clear_multi(key->d, key->e, key->N, key->dQ, key->dP, key->qP, key->p, key->q, NULL);
return err;
}
#endif /* LTC_MRSA */