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Add compute key support to EC_KEY_METHOD

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Reviewed-by: Richard Levitte <levitte@openssl.org>
This commit is contained in:
Dr. Stephen Henson 2015-10-22 18:48:59 +01:00
parent 647b223875
commit a22a7e7089
3 changed files with 26 additions and 1 deletions
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14
crypto/ec/ec_kmeth.c
View File

@ -61,7 +61,8 @@
static const EC_KEY_METHOD openssl_ec_key_method = {
"OpenSSL EC_KEY method",
0,
ossl_ec_key_gen
ossl_ec_key_gen,
ossl_ecdh_compute_key
};
const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
@ -119,3 +120,14 @@ EC_KEY *EC_KEY_new_method(ENGINE *engine)
ret->references = 1;
return (ret);
}
int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
EC_KEY *eckey,
void *(*KDF) (const void *in, size_t inlen, void *out,
size_t *outlen))
{
if (eckey->meth->compute_key)
return eckey->meth->compute_key(out, outlen, pub_key, eckey, KDF);
ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
return 0;
}

8
crypto/ec/ec_lcl.h
View File

@ -561,8 +561,16 @@ struct ec_key_method_st {
const char *name;
int32_t flags;
int (*keygen)(EC_KEY *key);
int (*compute_key)(void *out, size_t outlen, const EC_POINT *pub_key,
EC_KEY *ecdh,
void *(*KDF) (const void *in, size_t inlen,
void *out, size_t *outlen));
} /* EC_KEY_METHOD */ ;
#define EC_KEY_METHOD_DYNAMIC 1
int ossl_ec_key_gen(EC_KEY *eckey);
int ossl_ecdh_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
EC_KEY *ecdh,
void *(*KDF) (const void *in, size_t inlen,
void *out, size_t *outlen));

5
include/openssl/ec.h
View File

@ -749,6 +749,7 @@ typedef struct ec_key_method_st EC_KEY_METHOD;
/* some values for the flags field */
# define EC_FLAG_NON_FIPS_ALLOW 0x1
# define EC_FLAG_FIPS_CHECKED 0x2
# define EC_FLAG_COFACTOR_ECDH 0x1000
/** Creates a new EC_KEY object.
* \return EC_KEY object or NULL if an error occurred.
@ -994,6 +995,10 @@ int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
const unsigned char *sinfo, size_t sinfolen,
const EVP_MD *md);
int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
EC_KEY *ecdh, void *(*KDF) (const void *in, size_t inlen,
void *out, size_t *outlen));
# define ECParameters_dup(x) ASN1_dup_of(EC_KEY,i2d_ECParameters,d2i_ECParameters,x)
# ifndef __cplusplus