diff options
Diffstat (limited to 'libtomcrypt/src/pk/rsa/rsa_set.c')
| -rw-r--r-- | libtomcrypt/src/pk/rsa/rsa_set.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/libtomcrypt/src/pk/rsa/rsa_set.c b/libtomcrypt/src/pk/rsa/rsa_set.c new file mode 100644 index 0000000..0d540c4 --- /dev/null +++ b/libtomcrypt/src/pk/rsa/rsa_set.c @@ -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: $Format:%ai$ */ |