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Commit 8be0b84e authored by Salvatore Benedetto's avatar Salvatore Benedetto Committed by Herbert Xu
Browse files

crypto: rsa - Store rest of the private key components 



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

Signed-off-by: default avatarSalvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent e24860f2

crypto/rsa_helper.c

+75 −0
Original line number Diff line number Diff line
@@ -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,

crypto/rsaprivkey.asn1

+5 −5
Original line number Diff line number Diff line
@@ -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 })

}

include/crypto/internal/rsa.h

+20 −0
Original line number Diff line number Diff line
@@ -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,