X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdh%2Fdh_pmeth.c;h=6452482c87d2f954371f32657465363fdad2685e;hp=aaf32804b8e1b4f24bc18001d9655a3738cf622b;hb=d46d2da41c75ff765c914bf1c19063e97c8c519a;hpb=ffb1ac674c8294bf519add26fb37d94b7afeceb4

diff --git a/crypto/dh/dh_pmeth.c b/crypto/dh/dh_pmeth.c
index aaf32804b8..6452482c87 100644
--- a/crypto/dh/dh_pmeth.c
+++ b/crypto/dh/dh_pmeth.c
@@ -1,5 +1,6 @@
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 2006.
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2006.
  */
 /* ====================================================================
  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
@@ -9,7 +10,7 @@
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
+ *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
@@ -59,181 +60,499 @@
 #include "cryptlib.h"
 #include <openssl/asn1t.h>
 #include <openssl/x509.h>
-#include <openssl/rsa.h>
 #include <openssl/evp.h>
+#include <openssl/dh.h>
+#include <openssl/bn.h>
+#ifndef OPENSSL_NO_DSA
+# include <openssl/dsa.h>
+#endif
+#include <openssl/objects.h>
 #include "evp_locl.h"
 
 /* DH pkey context structure */
 
-typedef struct
-	{
-	/* Parameter gen parameters */
-	int prime_len;
-	int generator;
-	int use_dsa;
-	/* Keygen callback info */
-	int gentmp[2];
-	/* message digest */
-	} DH_PKEY_CTX;
+typedef struct {
+    /* Parameter gen parameters */
+    int prime_len;
+    int generator;
+    int use_dsa;
+    int subprime_len;
+    /* message digest used for parameter generation */
+    const EVP_MD *md;
+    int rfc5114_param;
+    /* Keygen callback info */
+    int gentmp[2];
+    /* KDF (if any) to use for DH */
+    char kdf_type;
+    /* OID to use for KDF */
+    ASN1_OBJECT *kdf_oid;
+    /* Message digest to use for key derivation */
+    const EVP_MD *kdf_md;
+    /* User key material */
+    unsigned char *kdf_ukm;
+    size_t kdf_ukmlen;
+    /* KDF output length */
+    size_t kdf_outlen;
+} DH_PKEY_CTX;
 
 static int pkey_dh_init(EVP_PKEY_CTX *ctx)
-	{
-	DH_PKEY_CTX *dctx;
-	dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX));
-	if (!dctx)
-		return 0;
-	dctx->prime_len = 1024;
-	dctx->generator = 2;
-	dctx->use_dsa = 0;
-
-	ctx->data = dctx;
-	ctx->keygen_info = dctx->gentmp;
-	ctx->keygen_info_count = 2;
-	
-	return 1;
-	}
+{
+    DH_PKEY_CTX *dctx;
+    dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX));
+    if (!dctx)
+        return 0;
+    dctx->prime_len = 1024;
+    dctx->subprime_len = -1;
+    dctx->generator = 2;
+    dctx->use_dsa = 0;
+    dctx->md = NULL;
+    dctx->rfc5114_param = 0;
+
+    dctx->kdf_type = EVP_PKEY_DH_KDF_NONE;
+    dctx->kdf_oid = NULL;
+    dctx->kdf_md = NULL;
+    dctx->kdf_ukm = NULL;
+    dctx->kdf_ukmlen = 0;
+    dctx->kdf_outlen = 0;
+
+    ctx->data = dctx;
+    ctx->keygen_info = dctx->gentmp;
+    ctx->keygen_info_count = 2;
+
+    return 1;
+}
+
+static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
+{
+    DH_PKEY_CTX *dctx, *sctx;
+    if (!pkey_dh_init(dst))
+        return 0;
+    sctx = src->data;
+    dctx = dst->data;
+    dctx->prime_len = sctx->prime_len;
+    dctx->subprime_len = sctx->subprime_len;
+    dctx->generator = sctx->generator;
+    dctx->use_dsa = sctx->use_dsa;
+    dctx->md = sctx->md;
+    dctx->rfc5114_param = sctx->rfc5114_param;
+
+    dctx->kdf_type = sctx->kdf_type;
+    dctx->kdf_oid = OBJ_dup(sctx->kdf_oid);
+    if (!dctx->kdf_oid)
+        return 0;
+    dctx->kdf_md = sctx->kdf_md;
+    if (dctx->kdf_ukm) {
+        dctx->kdf_ukm = BUF_memdup(sctx->kdf_ukm, sctx->kdf_ukmlen);
+        dctx->kdf_ukmlen = sctx->kdf_ukmlen;
+    }
+    dctx->kdf_outlen = sctx->kdf_outlen;
+    return 1;
+}
 
 static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx)
-	{
-	DH_PKEY_CTX *dctx = ctx->data;
-	if (dctx)
-		OPENSSL_free(dctx);
-	}
+{
+    DH_PKEY_CTX *dctx = ctx->data;
+    if (dctx) {
+        if (dctx->kdf_ukm)
+            OPENSSL_free(dctx->kdf_ukm);
+        if (dctx->kdf_oid)
+            ASN1_OBJECT_free(dctx->kdf_oid);
+        OPENSSL_free(dctx);
+    }
+}
 
 static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
-	{
-	DH_PKEY_CTX *dctx = ctx->data;
-	switch (type)
-		{
-		case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
-		if (p1 < 256)
-			return -2;
-		dctx->prime_len = p1;
-		return 1;
-
-		case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
-		dctx->generator = p1;
-		return 1;
-
-		case EVP_PKEY_CTRL_PEER_KEY:
-		/* Default behaviour is OK */
-		return 1;
-
-		default:
-		return -2;
-
-		}
-	}
-
-			
+{
+    DH_PKEY_CTX *dctx = ctx->data;
+    switch (type) {
+    case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
+        if (p1 < 256)
+            return -2;
+        dctx->prime_len = p1;
+        return 1;
+
+    case EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN:
+        if (dctx->use_dsa == 0)
+            return -2;
+        dctx->subprime_len = p1;
+        return 1;
+
+    case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
+        if (dctx->use_dsa)
+            return -2;
+        dctx->generator = p1;
+        return 1;
+
+    case EVP_PKEY_CTRL_DH_PARAMGEN_TYPE:
+#ifdef OPENSSL_NO_DSA
+        if (p1 != 0)
+            return -2;
+#else
+        if (p1 < 0 || p1 > 2)
+            return -2;
+#endif
+        dctx->use_dsa = p1;
+        return 1;
+
+    case EVP_PKEY_CTRL_DH_RFC5114:
+        if (p1 < 1 || p1 > 3)
+            return -2;
+        dctx->rfc5114_param = p1;
+        return 1;
+
+    case EVP_PKEY_CTRL_PEER_KEY:
+        /* Default behaviour is OK */
+        return 1;
+
+    case EVP_PKEY_CTRL_DH_KDF_TYPE:
+        if (p1 == -2)
+            return dctx->kdf_type;
+#ifdef OPENSSL_NO_CMS
+        if (p1 != EVP_PKEY_DH_KDF_NONE)
+#else
+        if (p1 != EVP_PKEY_DH_KDF_NONE && p1 != EVP_PKEY_DH_KDF_X9_42)
+#endif
+            return -2;
+        dctx->kdf_type = p1;
+        return 1;
+
+    case EVP_PKEY_CTRL_DH_KDF_MD:
+        dctx->kdf_md = p2;
+        return 1;
+
+    case EVP_PKEY_CTRL_GET_DH_KDF_MD:
+        *(const EVP_MD **)p2 = dctx->kdf_md;
+        return 1;
+
+    case EVP_PKEY_CTRL_DH_KDF_OUTLEN:
+        if (p1 <= 0)
+            return -2;
+        dctx->kdf_outlen = (size_t)p1;
+        return 1;
+
+    case EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN:
+        *(int *)p2 = dctx->kdf_outlen;
+        return 1;
+
+    case EVP_PKEY_CTRL_DH_KDF_UKM:
+        if (dctx->kdf_ukm)
+            OPENSSL_free(dctx->kdf_ukm);
+        dctx->kdf_ukm = p2;
+        if (p2)
+            dctx->kdf_ukmlen = p1;
+        else
+            dctx->kdf_ukmlen = 0;
+        return 1;
+
+    case EVP_PKEY_CTRL_GET_DH_KDF_UKM:
+        *(unsigned char **)p2 = dctx->kdf_ukm;
+        return dctx->kdf_ukmlen;
+
+    case EVP_PKEY_CTRL_DH_KDF_OID:
+        if (dctx->kdf_oid)
+            ASN1_OBJECT_free(dctx->kdf_oid);
+        dctx->kdf_oid = p2;
+        return 1;
+
+    case EVP_PKEY_CTRL_GET_DH_KDF_OID:
+        *(ASN1_OBJECT **)p2 = dctx->kdf_oid;
+        return 1;
+
+    default:
+        return -2;
+
+    }
+}
+
 static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx,
-			const char *type, const char *value)
-	{
-	if (!strcmp(type, "dh_paramgen_prime_len"))
-		{
-		int len;
-		len = atoi(value);
-		return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len);
-		}
-	if (!strcmp(type, "dh_paramgen_generator"))
-		{
-		int len;
-		len = atoi(value);
-		return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len);
-		}
-	return -2;
-	}
+                            const char *type, const char *value)
+{
+    if (!strcmp(type, "dh_paramgen_prime_len")) {
+        int len;
+        len = atoi(value);
+        return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len);
+    }
+    if (!strcmp(type, "dh_rfc5114")) {
+        DH_PKEY_CTX *dctx = ctx->data;
+        int len;
+        len = atoi(value);
+        if (len < 0 || len > 3)
+            return -2;
+        dctx->rfc5114_param = len;
+        return 1;
+    }
+    if (!strcmp(type, "dh_paramgen_generator")) {
+        int len;
+        len = atoi(value);
+        return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len);
+    }
+    if (!strcmp(type, "dh_paramgen_subprime_len")) {
+        int len;
+        len = atoi(value);
+        return EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, len);
+    }
+    if (!strcmp(type, "dh_paramgen_type")) {
+        int typ;
+        typ = atoi(value);
+        return EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ);
+    }
+    return -2;
+}
+
+#ifndef OPENSSL_NO_DSA
+
+extern int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
+                                const EVP_MD *evpmd,
+                                const unsigned char *seed_in, size_t seed_len,
+                                unsigned char *seed_out, int *counter_ret,
+                                unsigned long *h_ret, BN_GENCB *cb);
+
+extern int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
+                                 const EVP_MD *evpmd,
+                                 const unsigned char *seed_in,
+                                 size_t seed_len, int idx,
+                                 unsigned char *seed_out, int *counter_ret,
+                                 unsigned long *h_ret, BN_GENCB *cb);
+
+static DSA *dsa_dh_generate(DH_PKEY_CTX *dctx, BN_GENCB *pcb)
+{
+    DSA *ret;
+    int rv = 0;
+    int prime_len = dctx->prime_len;
+    int subprime_len = dctx->subprime_len;
+    const EVP_MD *md = dctx->md;
+    if (dctx->use_dsa > 2)
+        return NULL;
+    ret = DSA_new();
+    if (!ret)
+        return NULL;
+    if (subprime_len == -1) {
+        if (prime_len >= 2048)
+            subprime_len = 256;
+        else
+            subprime_len = 160;
+    }
+    if (md == NULL) {
+        if (prime_len >= 2048)
+            md = EVP_sha256();
+        else
+            md = EVP_sha1();
+    }
+    if (dctx->use_dsa == 1)
+        rv = dsa_builtin_paramgen(ret, prime_len, subprime_len, md,
+                                  NULL, 0, NULL, NULL, NULL, pcb);
+    else if (dctx->use_dsa == 2)
+        rv = dsa_builtin_paramgen2(ret, prime_len, subprime_len, md,
+                                   NULL, 0, -1, NULL, NULL, NULL, pcb);
+    if (rv <= 0) {
+        DSA_free(ret);
+        return NULL;
+    }
+    return ret;
+}
+
+#endif
 
 static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
-	{
-	DH *dh = NULL;
-	DH_PKEY_CTX *dctx = ctx->data;
-	BN_GENCB *pcb, cb;
-	int ret;
-	if (ctx->pkey_gencb)
-		{
-		pcb = &cb;
-		evp_pkey_set_cb_translate(pcb, ctx);
-		}
-	else
-		pcb = NULL;
-	dh = DH_new();
-	if (!dh)
-		return 0;
-	ret = DH_generate_parameters_ex(dh,
-					dctx->prime_len, dctx->generator, pcb);
-	if (ret)
-		EVP_PKEY_assign_DH(pkey, dh);
-	else
-		DH_free(dh);
-	return ret;
-	}
+{
+    DH *dh = NULL;
+    DH_PKEY_CTX *dctx = ctx->data;
+    BN_GENCB *pcb, cb;
+    int ret;
+    if (dctx->rfc5114_param) {
+        switch (dctx->rfc5114_param) {
+        case 1:
+            dh = DH_get_1024_160();
+            break;
+
+        case 2:
+            dh = DH_get_2048_224();
+            break;
+
+        case 3:
+            dh = DH_get_2048_256();
+            break;
+
+        default:
+            return -2;
+        }
+        EVP_PKEY_assign(pkey, EVP_PKEY_DHX, dh);
+        return 1;
+    }
+
+    if (ctx->pkey_gencb) {
+        pcb = &cb;
+        evp_pkey_set_cb_translate(pcb, ctx);
+    } else
+        pcb = NULL;
+#ifndef OPENSSL_NO_DSA
+    if (dctx->use_dsa) {
+        DSA *dsa_dh;
+        dsa_dh = dsa_dh_generate(dctx, pcb);
+        if (!dsa_dh)
+            return 0;
+        dh = DSA_dup_DH(dsa_dh);
+        DSA_free(dsa_dh);
+        if (!dh)
+            return 0;
+        EVP_PKEY_assign(pkey, EVP_PKEY_DHX, dh);
+        return 1;
+    }
+#endif
+    dh = DH_new();
+    if (!dh)
+        return 0;
+    ret = DH_generate_parameters_ex(dh,
+                                    dctx->prime_len, dctx->generator, pcb);
+
+    if (ret)
+        EVP_PKEY_assign_DH(pkey, dh);
+    else
+        DH_free(dh);
+    return ret;
+}
 
 static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
-	{
-	DH *dh = NULL;
-	if (ctx->pkey == NULL)
-		{
-		DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
-		return 0;
-		}
-	dh = DH_new();
-	if (!dh)
-		return 0;
-	EVP_PKEY_assign_DH(pkey, dh);
-	/* Note: if error return, pkey is freed by parent routine */
-	if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
-		return 0;
-	return DH_generate_key(pkey->pkey.dh);
-	}
-
-static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key, int *keylen)
-	{
-	int ret;
-	if (!ctx->pkey || !ctx->peerkey)
-		{
-		DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
-		return 0;
-		}
-	ret = DH_compute_key(key, ctx->peerkey->pkey.dh->pub_key,
-							ctx->pkey->pkey.dh);
-	if (ret < 0)
-		return ret;
-	*keylen = ret;
-	return 1;
-	}
-
-const EVP_PKEY_METHOD dh_pkey_meth = 
-	{
-	EVP_PKEY_DH,
-	0,
-	pkey_dh_init,
-	pkey_dh_cleanup,
-
-	0,
-	pkey_dh_paramgen,
-
-	0,
-	pkey_dh_keygen,
-
-	0,
-	0,
-
-	0,
-	0,
-
-	0,0,
-
-	0,0,0,0,
-
-	0,0,
-
-	0,0,
-
-	0,
-	pkey_dh_derive,
-
-	pkey_dh_ctrl,
-	pkey_dh_ctrl_str
-
-	};
+{
+    DH *dh = NULL;
+    if (ctx->pkey == NULL) {
+        DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
+        return 0;
+    }
+    dh = DH_new();
+    if (!dh)
+        return 0;
+    EVP_PKEY_assign(pkey, ctx->pmeth->pkey_id, dh);
+    /* Note: if error return, pkey is freed by parent routine */
+    if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
+        return 0;
+    return DH_generate_key(pkey->pkey.dh);
+}
+
+static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
+                          size_t *keylen)
+{
+    int ret;
+    DH *dh;
+    DH_PKEY_CTX *dctx = ctx->data;
+    BIGNUM *dhpub;
+    if (!ctx->pkey || !ctx->peerkey) {
+        DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
+        return 0;
+    }
+    dh = ctx->pkey->pkey.dh;
+    dhpub = ctx->peerkey->pkey.dh->pub_key;
+    if (dctx->kdf_type == EVP_PKEY_DH_KDF_NONE) {
+        if (key == NULL) {
+            *keylen = DH_size(dh);
+            return 1;
+        }
+        ret = DH_compute_key(key, dhpub, dh);
+        if (ret < 0)
+            return ret;
+        *keylen = ret;
+        return 1;
+    }
+#ifndef OPENSSL_NO_CMS
+    else if (dctx->kdf_type == EVP_PKEY_DH_KDF_X9_42) {
+        unsigned char *Z = NULL;
+        size_t Zlen = 0;
+        if (!dctx->kdf_outlen || !dctx->kdf_oid)
+            return 0;
+        if (key == NULL) {
+            *keylen = dctx->kdf_outlen;
+            return 1;
+        }
+        if (*keylen != dctx->kdf_outlen)
+            return 0;
+        ret = 0;
+        Zlen = DH_size(dh);
+        Z = OPENSSL_malloc(Zlen);
+        if (!Z) {
+            goto err;
+        }
+        if (DH_compute_key_padded(Z, dhpub, dh) <= 0)
+            goto err;
+        if (!DH_KDF_X9_42(key, *keylen, Z, Zlen, dctx->kdf_oid,
+                          dctx->kdf_ukm, dctx->kdf_ukmlen, dctx->kdf_md))
+            goto err;
+        *keylen = dctx->kdf_outlen;
+        ret = 1;
+ err:
+        if (Z) {
+            OPENSSL_cleanse(Z, Zlen);
+            OPENSSL_free(Z);
+        }
+        return ret;
+    }
+#endif
+    return 1;
+}
+
+const EVP_PKEY_METHOD dh_pkey_meth = {
+    EVP_PKEY_DH,
+    0,
+    pkey_dh_init,
+    pkey_dh_copy,
+    pkey_dh_cleanup,
+
+    0,
+    pkey_dh_paramgen,
+
+    0,
+    pkey_dh_keygen,
+
+    0,
+    0,
+
+    0,
+    0,
+
+    0, 0,
+
+    0, 0, 0, 0,
+
+    0, 0,
+
+    0, 0,
+
+    0,
+    pkey_dh_derive,
+
+    pkey_dh_ctrl,
+    pkey_dh_ctrl_str
+};
+
+const EVP_PKEY_METHOD dhx_pkey_meth = {
+    EVP_PKEY_DHX,
+    0,
+    pkey_dh_init,
+    pkey_dh_copy,
+    pkey_dh_cleanup,
+
+    0,
+    pkey_dh_paramgen,
+
+    0,
+    pkey_dh_keygen,
+
+    0,
+    0,
+
+    0,
+    0,
+
+    0, 0,
+
+    0, 0, 0, 0,
+
+    0, 0,
+
+    0, 0,
+
+    0,
+    pkey_dh_derive,
+
+    pkey_dh_ctrl,
+    pkey_dh_ctrl_str
+};