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Add pad support

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Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4485)
This commit is contained in:
Dr. Stephen Henson 2017-09-21 15:40:15 +01:00
parent 9b82c8b1c1
commit f4403a1fa9
2 changed files with 20 additions and 1 deletions
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14
crypto/dh/dh_pmeth.c
View file

@ -26,6 +26,7 @@ typedef struct {
int generator;
int use_dsa;
int subprime_len;
int pad;
/* message digest used for parameter generation */
const EVP_MD *md;
int rfc5114_param;
@ -86,6 +87,7 @@ static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
dctx->subprime_len = sctx->subprime_len;
dctx->generator = sctx->generator;
dctx->use_dsa = sctx->use_dsa;
dctx->pad = sctx->pad;
dctx->md = sctx->md;
dctx->rfc5114_param = sctx->rfc5114_param;
dctx->param_nid = sctx->param_nid;
@ -121,6 +123,10 @@ static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
dctx->subprime_len = p1;
return 1;
case EVP_PKEY_CTRL_DH_PAD:
dctx->pad = p1;
return 1;
case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
if (dctx->use_dsa)
return -2;
@ -255,6 +261,11 @@ static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx,
typ = atoi(value);
return EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ);
}
if (strcmp(type, "dh_pad") == 0) {
int pad;
pad = atoi(value);
return EVP_PKEY_CTX_set_dh_pad(ctx, pad);
}
return -2;
}
@ -423,6 +434,9 @@ static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
*keylen = DH_size(dh);
return 1;
}
if (dctx->pad)
ret = DH_compute_key_padded(key, dhpub, dh);
else
ret = DH_compute_key(key, dhpub, dh);
if (ret < 0)
return ret;

5
include/openssl/dh.h
View file

@ -247,6 +247,10 @@ int DH_meth_set_generate_params(DH_METHOD *dhm,
EVP_PKEY_OP_PARAMGEN | EVP_PKEY_OP_KEYGEN, \
EVP_PKEY_CTRL_DH_NID, nid, NULL)
# define EVP_PKEY_CTX_set_dh_pad(ctx, pad) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_DH_PAD, pad, NULL)
# define EVP_PKEY_CTX_set_dh_kdf_type(ctx, kdf) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
EVP_PKEY_OP_DERIVE, \
@ -312,6 +316,7 @@ int DH_meth_set_generate_params(DH_METHOD *dhm,
# define EVP_PKEY_CTRL_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 13)
# define EVP_PKEY_CTRL_GET_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 14)
# define EVP_PKEY_CTRL_DH_NID (EVP_PKEY_ALG_CTRL + 15)
# define EVP_PKEY_CTRL_DH_PAD (EVP_PKEY_ALG_CTRL + 16)
/* KDF types */
# define EVP_PKEY_DH_KDF_NONE 1