X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdh%2Fdh_ameth.c;h=2f2589bc25aec884052c3a5f2903ea58df8fa6fa;hp=bcc56a166e5abd5bc0795e13a815ab50db700365;hb=c20276e4aef1e716980589c43cf9276abc7ff2b7;hpb=d82e2718e2a1346b231abda31a102b144ac21090

diff --git a/crypto/dh/dh_ameth.c b/crypto/dh/dh_ameth.c
index bcc56a166e..2f2589bc25 100644
--- a/crypto/dh/dh_ameth.c
+++ b/crypto/dh/dh_ameth.c
@@ -67,28 +67,431 @@ static void int_dh_free(EVP_PKEY *pkey)
 	DH_free(pkey->pkey.dh);
 	}
 
+static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
+	{
+	const unsigned char *p, *pm;
+	int pklen, pmlen;
+	int ptype;
+	void *pval;
+	ASN1_STRING *pstr;
+	X509_ALGOR *palg;
+	ASN1_INTEGER *public_key = NULL;
+
+	DH *dh = NULL;
+
+	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
+		return 0;
+	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
+
+	if (ptype != V_ASN1_SEQUENCE)
+		{
+		DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR);
+		goto err;
+		}
+
+	pstr = pval;	
+	pm = pstr->data;
+	pmlen = pstr->length;
+
+	if (!(dh = d2i_DHparams(NULL, &pm, pmlen)))
+		{
+		DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
+		goto err;
+		}
+
+	if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
+		{
+		DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
+		goto err;
+		}
+
+	/* We have parameters now set public key */
+	if (!(dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
+		{
+		DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR);
+		goto err;
+		}
+
+	ASN1_INTEGER_free(public_key);
+	EVP_PKEY_assign_DH(pkey, dh);
+	return 1;
+
+	err:
+	if (pubkey)
+		ASN1_INTEGER_free(public_key);
+	if (dh)
+		DH_free(dh);
+	return 0;
+
+	}
+
+static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
+	{
+	DH *dh;
+	void *pval = NULL;
+	int ptype;
+	unsigned char *penc = NULL;
+	int penclen;
+	ASN1_STRING *str;
+	ASN1_INTEGER *pub_key = NULL;
+
+	dh=pkey->pkey.dh;
+
+	str = ASN1_STRING_new();
+	str->length = i2d_DHparams(dh, &str->data);
+	if (str->length <= 0)
+		{
+		DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+	pval = str;
+	ptype = V_ASN1_SEQUENCE;
+
+	pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL);
+	if (!pub_key)
+		goto err;
+
+	penclen = i2d_ASN1_INTEGER(pub_key, &penc);
+
+	ASN1_INTEGER_free(pub_key);
+
+	if (penclen <= 0)
+		{
+		DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+
+	if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DH),
+				ptype, pval, penc, penclen))
+		return 1;
+
+	err:
+	if (penc)
+		OPENSSL_free(penc);
+	if (pval)
+		ASN1_STRING_free(pval);
+
+	return 0;
+	}
+
+
+/* PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in
+ * that the AlgorithmIdentifier contains the paramaters, the private key
+ * is explcitly included and the pubkey must be recalculated.
+ */
+	
+static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
+	{
+	const unsigned char *p, *pm;
+	int pklen, pmlen;
+	int ptype;
+	void *pval;
+	ASN1_STRING *pstr;
+	X509_ALGOR *palg;
+	ASN1_INTEGER *privkey = NULL;
+
+	DH *dh = NULL;
+
+	if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
+		return 0;
+
+	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
+
+	if (ptype != V_ASN1_SEQUENCE)
+			goto decerr;
+
+	if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
+		goto decerr;
+
+
+	pstr = pval;	
+	pm = pstr->data;
+	pmlen = pstr->length;
+	if (!(dh = d2i_DHparams(NULL, &pm, pmlen)))
+		goto decerr;
+	/* We have parameters now set private key */
+	if (!(dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
+		{
+		DHerr(DH_F_DH_PRIV_DECODE,DH_R_BN_ERROR);
+		goto dherr;
+		}
+	/* Calculate public key */
+	if (!DH_generate_key(dh))
+		goto dherr;
+
+	EVP_PKEY_assign_DH(pkey, dh);
+
+	ASN1_INTEGER_free(privkey);
+
+	return 1;
+
+	decerr:
+	DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR);
+	dherr:
+	DH_free(dh);
+	return 0;
+	}
+
+static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
+{
+	ASN1_STRING *params = NULL;
+	ASN1_INTEGER *prkey = NULL;
+	unsigned char *dp = NULL;
+	int dplen;
+
+	params = ASN1_STRING_new();
+
+	if (!params)
+		{
+		DHerr(DH_F_DH_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+
+	params->length = i2d_DHparams(pkey->pkey.dh, &params->data);
+	if (params->length <= 0)
+		{
+		DHerr(DH_F_DH_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+	params->type = V_ASN1_SEQUENCE;
+
+	/* Get private key into integer */
+	prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL);
+
+	if (!prkey)
+		{
+		DHerr(DH_F_DH_PRIV_ENCODE,DH_R_BN_ERROR);
+		goto err;
+		}
+
+	dplen = i2d_ASN1_INTEGER(prkey, &dp);
+
+	ASN1_INTEGER_free(prkey);
+
+	if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dhKeyAgreement), 0,
+				V_ASN1_SEQUENCE, params, dp, dplen))
+		goto err;
+
+	return 1;
+
+err:
+	if (dp != NULL)
+		OPENSSL_free(dp);
+	if (params != NULL)
+		ASN1_STRING_free(params);
+	if (prkey != NULL)
+		ASN1_INTEGER_free(prkey);
+	return 0;
+}
+
+
+static void update_buflen(const BIGNUM *b, size_t *pbuflen)
+	{
+	size_t i;
+	if (!b)
+		return;
+	if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
+			*pbuflen = i;
+	}
+
+static int dh_param_decode(EVP_PKEY *pkey,
+					const unsigned char **pder, int derlen)
+	{
+	DH *dh;
+	if (!(dh = d2i_DHparams(NULL, pder, derlen)))
+		{
+		DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
+		return 0;
+		}
+	EVP_PKEY_assign_DH(pkey, dh);
+	return 1;
+	}
+
+static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
+	{
+	return i2d_DHparams(pkey->pkey.dh, pder);
+	}
+
+static int do_dh_print(BIO *bp, const DH *x, int indent,
+						ASN1_PCTX *ctx, int ptype)
+	{
+	unsigned char *m=NULL;
+	int reason=ERR_R_BUF_LIB,ret=0;
+	size_t buf_len=0;
+
+	const char *ktype = NULL;
+
+	BIGNUM *priv_key, *pub_key;
+
+	if (ptype == 2)
+		priv_key = x->priv_key;
+	else
+		priv_key = NULL;
+
+	if (ptype > 0)
+		pub_key = x->pub_key;
+	else
+		pub_key = NULL;
+
+	update_buflen(x->p, &buf_len);
+
+	if (buf_len == 0)
+		{
+		reason = ERR_R_PASSED_NULL_PARAMETER;
+		goto err;
+		}
+
+	update_buflen(x->g, &buf_len);
+	update_buflen(pub_key, &buf_len);
+	update_buflen(priv_key, &buf_len);
+
+	if (ptype == 2)
+		ktype = "PKCS#3 DH Private-Key";
+	else if (ptype == 1)
+		ktype = "PKCS#3 DH Public-Key";
+	else
+		ktype = "PKCS#3 DH Parameters";
+
+	m= OPENSSL_malloc(buf_len+10);
+	if (m == NULL)
+		{
+		reason=ERR_R_MALLOC_FAILURE;
+		goto err;
+		}
+
+	BIO_indent(bp, indent, 128);
+	if (BIO_printf(bp,"%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0)
+		goto err;
+	indent += 4;
+
+	if (!ASN1_bn_print(bp,"private-key:",priv_key,m,indent)) goto err;
+	if (!ASN1_bn_print(bp,"public-key:",pub_key,m,indent)) goto err;
+
+	if (!ASN1_bn_print(bp,"prime:",x->p,m,indent)) goto err;
+	if (!ASN1_bn_print(bp,"generator:",x->g,m,indent)) goto err;
+	if (x->length != 0)
+		{
+		BIO_indent(bp, indent, 128);
+		if (BIO_printf(bp,"recommended-private-length: %d bits\n",
+			(int)x->length) <= 0) goto err;
+		}
+
+
+	ret=1;
+	if (0)
+		{
+err:
+		DHerr(DH_F_DHPARAMS_PRINT,reason);
+		}
+	if (m != NULL) OPENSSL_free(m);
+	return(ret);
+	}
+
+static int int_dh_size(const EVP_PKEY *pkey)
+	{
+	return(DH_size(pkey->pkey.dh));
+	}
+
+static int dh_bits(const EVP_PKEY *pkey)
+	{
+	return BN_num_bits(pkey->pkey.dh->p);
+	}
+
+static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
+	{
+	if (	BN_cmp(a->pkey.dh->p,b->pkey.dh->p) ||
+		BN_cmp(a->pkey.dh->g,b->pkey.dh->g))
+		return 0;
+	else
+		return 1;
+	}
+
+static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
+	{
+	BIGNUM *a;
+
+	if ((a=BN_dup(from->pkey.dh->p)) == NULL)
+		return 0;
+	if (to->pkey.dh->p != NULL)
+		BN_free(to->pkey.dh->p);
+	to->pkey.dh->p=a;
+
+	if ((a=BN_dup(from->pkey.dh->g)) == NULL)
+		return 0;
+	if (to->pkey.dh->g != NULL)
+		BN_free(to->pkey.dh->g);
+	to->pkey.dh->g=a;
+
+	return 1;
+	}
+
+static int dh_missing_parameters(const EVP_PKEY *a)
+	{
+	if (!a->pkey.dh->p || !a->pkey.dh->g)
+		return 1;
+	return 0;
+	}
+
+static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
+	{
+	if (dh_cmp_parameters(a, b) == 0)
+		return 0;
+	if (BN_cmp(b->pkey.dh->pub_key,a->pkey.dh->pub_key) != 0)
+		return 0;
+	else
+		return 1;
+	}
+
+static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+							ASN1_PCTX *ctx)
+	{
+	return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 0);
+	}
+
+static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+							ASN1_PCTX *ctx)
+	{
+	return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 1);
+	}
+
+static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+							ASN1_PCTX *ctx)
+	{
+	return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2);
+	}
+
+int DHparams_print(BIO *bp, const DH *x)
+	{
+	return do_dh_print(bp, x, 4, NULL, 0);
+	}
+
 const EVP_PKEY_ASN1_METHOD dh_asn1_meth = 
 	{
 	EVP_PKEY_DH,
 	EVP_PKEY_DH,
 	0,
 
-	"dh",
+	"DH",
 	"OpenSSL PKCS#3 DH method",
 
-	0,
-	0,
-	0,
-	0,
+	dh_pub_decode,
+	dh_pub_encode,
+	dh_pub_cmp,
+	dh_public_print,
 
-	0,
-	0,
-	0,
+	dh_priv_decode,
+	dh_priv_encode,
+	dh_private_print,
 
-	0,
-	0,
+	int_dh_size,
+	dh_bits,
 
-	0,0,0,0,0,0,
+	dh_param_decode,
+	dh_param_encode,
+	dh_missing_parameters,
+	dh_copy_parameters,
+	dh_cmp_parameters,
+	dh_param_print,
 
 	int_dh_free,
 	0