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enhance EC method to support setting curve type when generating keys and add parameter encoding option

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This commit is contained in:
Dr. Stephen Henson 2012-09-11 13:54:09 +00:00
parent 0a17b8de06
commit 24edfa9df9
2 changed files with 41 additions and 5 deletions
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8
crypto/ec/ec.h
View file

@ -956,11 +956,17 @@ int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
#endif
#define EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, EVP_PKEY_OP_PARAMGEN, \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID, nid, NULL)
#define EVP_PKEY_CTX_set_ec_param_enc(ctx, flag) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
EVP_PKEY_CTRL_EC_PARAM_ENC, flag, NULL)
#define EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID (EVP_PKEY_ALG_CTRL + 1)
#define EVP_PKEY_CTRL_EC_PARAM_ENC (EVP_PKEY_ALG_CTRL + 2)
/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes

38
crypto/ec/ec_pmeth.c
View file

@ -219,6 +219,15 @@ static int pkey_ec_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
dctx->gen_group = group;
return 1;
case EVP_PKEY_CTRL_EC_PARAM_ENC:
if (!dctx->gen_group)
{
ECerr(EC_F_PKEY_EC_CTRL, EC_R_NO_PARAMETERS_SET);
return 0;
}
EC_GROUP_set_asn1_flag(dctx->gen_group, p1);
return 1;
case EVP_PKEY_CTRL_MD:
if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
EVP_MD_type((const EVP_MD *)p2) != NID_ecdsa_with_SHA1 &&
@ -264,6 +273,18 @@ static int pkey_ec_ctrl_str(EVP_PKEY_CTX *ctx,
}
return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid);
}
else if (!strcmp(type, "ec_param_enc"))
{
int param_enc;
if (!strcmp(value, "explicit"))
param_enc = 0;
else if (!strcmp(value, "named_curve"))
param_enc = OPENSSL_EC_NAMED_CURVE;
else
return -2;
return EVP_PKEY_CTX_set_ec_param_enc(ctx, param_enc);
}
return -2;
}
@ -291,7 +312,8 @@ static int pkey_ec_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
static int pkey_ec_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
EC_KEY *ec = NULL;
if (ctx->pkey == NULL)
EC_PKEY_CTX *dctx = ctx->data;
if (ctx->pkey == NULL && dctx->gen_group == NULL)
{
ECerr(EC_F_PKEY_EC_KEYGEN, EC_R_NO_PARAMETERS_SET);
return 0;
@ -300,9 +322,17 @@ static int pkey_ec_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
if (!ec)
return 0;
EVP_PKEY_assign_EC_KEY(pkey, ec);
/* Note: if error return, pkey is freed by parent routine */
if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
return 0;
if (ctx->pkey)
{
/* Note: if error return, pkey is freed by parent routine */
if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
return 0;
}
else
{
if (!EC_KEY_set_group(ec, dctx->gen_group))
return 0;
}
return EC_KEY_generate_key(pkey->pkey.ec);
}