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crypto: rsa - Store rest of the private key components

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When parsing a private key, store all non-optional fields. These
are required for enabling CRT mode for decrypt and verify

Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Salvatore Benedetto 2016-07-04 17:21:38 +01:00 committed by Herbert Xu
parent e24860f2a6
commit 8be0b84e58
3 changed files with 100 additions and 5 deletions
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75
crypto/rsa_helper.c
View file

@ -78,6 +78,81 @@ int rsa_get_d(void *context, size_t hdrlen, unsigned char tag,
return 0;
}
int rsa_get_p(void *context, size_t hdrlen, unsigned char tag,
const void *value, size_t vlen)
{
struct rsa_key *key = context;
/* invalid key provided */
if (!value || !vlen || vlen > key->n_sz)
return -EINVAL;
key->p = value;
key->p_sz = vlen;
return 0;
}
int rsa_get_q(void *context, size_t hdrlen, unsigned char tag,
const void *value, size_t vlen)
{
struct rsa_key *key = context;
/* invalid key provided */
if (!value || !vlen || vlen > key->n_sz)
return -EINVAL;
key->q = value;
key->q_sz = vlen;
return 0;
}
int rsa_get_dp(void *context, size_t hdrlen, unsigned char tag,
const void *value, size_t vlen)
{
struct rsa_key *key = context;
/* invalid key provided */
if (!value || !vlen || vlen > key->n_sz)
return -EINVAL;
key->dp = value;
key->dp_sz = vlen;
return 0;
}
int rsa_get_dq(void *context, size_t hdrlen, unsigned char tag,
const void *value, size_t vlen)
{
struct rsa_key *key = context;
/* invalid key provided */
if (!value || !vlen || vlen > key->n_sz)
return -EINVAL;
key->dq = value;
key->dq_sz = vlen;
return 0;
}
int rsa_get_qinv(void *context, size_t hdrlen, unsigned char tag,
const void *value, size_t vlen)
{
struct rsa_key *key = context;
/* invalid key provided */
if (!value || !vlen || vlen > key->n_sz)
return -EINVAL;
key->qinv = value;
key->qinv_sz = vlen;
return 0;
}
/**
* rsa_parse_pub_key() - decodes the BER encoded buffer and stores in the
* provided struct rsa_key, pointers to the raw key as is,

10
crypto/rsaprivkey.asn1
View file

@ -3,9 +3,9 @@ RsaPrivKey ::= SEQUENCE {
n INTEGER ({ rsa_get_n }),
e INTEGER ({ rsa_get_e }),
d INTEGER ({ rsa_get_d }),
prime1 INTEGER,
prime2 INTEGER,
exponent1 INTEGER,
exponent2 INTEGER,
coefficient INTEGER
prime1 INTEGER ({ rsa_get_p }),
prime2 INTEGER ({ rsa_get_q }),
exponent1 INTEGER ({ rsa_get_dp }),
exponent2 INTEGER ({ rsa_get_dq }),
coefficient INTEGER ({ rsa_get_qinv })
}

20
include/crypto/internal/rsa.h
View file

@ -19,17 +19,37 @@
* @n : RSA modulus raw byte stream
* @e : RSA public exponent raw byte stream
* @d : RSA private exponent raw byte stream
* @p : RSA prime factor p of n raw byte stream
* @q : RSA prime factor q of n raw byte stream
* @dp : RSA exponent d mod (p - 1) raw byte stream
* @dq : RSA exponent d mod (q - 1) raw byte stream
* @qinv : RSA CRT coefficient q^(-1) mod p raw byte stream
* @n_sz : length in bytes of RSA modulus n
* @e_sz : length in bytes of RSA public exponent
* @d_sz : length in bytes of RSA private exponent
* @p_sz : length in bytes of p field
* @q_sz : length in bytes of q field
* @dp_sz : length in bytes of dp field
* @dq_sz : length in bytes of dq field
* @qinv_sz : length in bytes of qinv field
*/
struct rsa_key {
const u8 *n;
const u8 *e;
const u8 *d;
const u8 *p;
const u8 *q;
const u8 *dp;
const u8 *dq;
const u8 *qinv;
size_t n_sz;
size_t e_sz;
size_t d_sz;
size_t p_sz;
size_t q_sz;
size_t dp_sz;
size_t dq_sz;
size_t qinv_sz;
};
int rsa_parse_pub_key(struct rsa_key *rsa_key, const void *key,