wolfssl: Add wolfSSL plugin for cryptographic implementations
This commit is contained in:
Sean Parkinson
committed by
Tobias Brunner
Tobias Brunner
parent
6a995a63f5
commit
c92eade82c
@@ -0,0 +1,537 @@
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/*
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* Copyright (C) 2019 Sean Parkinson, wolfSSL Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "wolfssl_common.h"
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#ifndef NO_RSA
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#include "wolfssl_rsa_public_key.h"
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#include "wolfssl_util.h"
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#include <crypto/hashers/hasher.h>
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#include <utils/debug.h>
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#include <credentials/keys/signature_params.h>
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#include <wolfssl/wolfcrypt/rsa.h>
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typedef struct private_wolfssl_rsa_public_key_t private_wolfssl_rsa_public_key_t;
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/**
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* Private data structure with signing context.
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*/
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struct private_wolfssl_rsa_public_key_t {
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/**
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* Public interface for this signer.
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*/
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wolfssl_rsa_public_key_t public;
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/**
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* RSA key object from wolfSSL.
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*/
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RsaKey rsa;
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/**
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* Random number generator to use with RSA operations.
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*/
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WC_RNG rng;
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/**
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* reference counter
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*/
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refcount_t ref;
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};
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/**
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* Verify RSA signature
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*/
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static bool verify_signature(private_wolfssl_rsa_public_key_t *this,
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chunk_t data, chunk_t signature)
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{
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bool success = FALSE;
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int len = wc_RsaEncryptSize(&this->rsa);
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u_char *buf;
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u_char *p;
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if (signature.len > len)
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{
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signature = chunk_skip(signature, signature.len - len);
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}
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buf = malloc(len);
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memcpy(buf + len - signature.len, signature.ptr, signature.len);
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memset(buf, 0, len - signature.len);
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len = wc_RsaSSL_VerifyInline(buf, len, &p, &this->rsa);
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if (len > 0)
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{
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success = chunk_equals_const(data, chunk_create(p, len));
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}
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free(buf);
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return success;
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}
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/**
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* Verification of an EMSA PKCS1 signature described in PKCS#1
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*/
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static bool verify_emsa_pkcs1_signature(private_wolfssl_rsa_public_key_t *this,
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enum wc_HashType hash, chunk_t data,
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chunk_t signature)
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{
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bool success = FALSE;
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chunk_t dgst = chunk_empty, encDgst;
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int len;
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encDgst = chunk_alloc(wc_HashGetDigestSize(hash) + 20);
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if (wolfssl_hash_chunk(hash, data, &dgst))
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{
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len = wc_EncodeSignature(encDgst.ptr, dgst.ptr, dgst.len,
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wc_HashGetOID(hash));
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if (len > 0)
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{
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encDgst.len = len;
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success = verify_signature(this, encDgst, signature);
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}
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}
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chunk_free(&encDgst);
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chunk_free(&dgst);
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return success;
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}
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#ifdef WC_RSA_PSS
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/**
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* Verification of an EMSA PSS signature described in PKCS#1
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*/
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static bool verify_emsa_pss_signature(private_wolfssl_rsa_public_key_t *this,
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rsa_pss_params_t *params, chunk_t data,
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chunk_t signature)
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{
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chunk_t dgst = chunk_empty;
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enum wc_HashType hash;
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int mgf;
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bool success = FALSE;
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int len = 0;
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u_char *buf = NULL;
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u_char *p;
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if (!wolfssl_hash2type(params->hash, &hash))
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{
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return FALSE;
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}
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if (!wolfssl_hash2mgf1(params->mgf1_hash, &mgf))
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{
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return FALSE;
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}
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if (wolfssl_hash_chunk(hash, data, &dgst))
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{
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len = wc_RsaEncryptSize(&this->rsa);
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if (signature.len > len)
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{
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signature = chunk_skip(signature, signature.len - len);
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}
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buf = malloc(len);
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memcpy(buf + len - signature.len, signature.ptr, signature.len);
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memset(buf, 0, len - signature.len);
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len = wc_RsaPSS_VerifyInline_ex(buf, len, &p, hash, mgf,
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params->salt_len, &this->rsa);
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if (len > 0)
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{
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success = wc_RsaPSS_CheckPadding_ex(dgst.ptr, dgst.len, p, len,
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hash, params->salt_len, mp_count_bits(&this->rsa.n)) == 0;
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}
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}
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chunk_free(&dgst);
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if (buf != NULL)
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{
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free(buf);
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}
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return success;
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}
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#endif
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METHOD(public_key_t, get_type, key_type_t,
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private_wolfssl_rsa_public_key_t *this)
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{
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return KEY_RSA;
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}
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METHOD(public_key_t, verify, bool,
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private_wolfssl_rsa_public_key_t *this, signature_scheme_t scheme,
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void *params, chunk_t data, chunk_t signature)
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{
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switch (scheme)
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{
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case SIGN_RSA_EMSA_PKCS1_NULL:
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return verify_signature(this, data, signature);
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case SIGN_RSA_EMSA_PKCS1_SHA2_224:
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return verify_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA224, data,
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signature);
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case SIGN_RSA_EMSA_PKCS1_SHA2_256:
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return verify_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA256, data,
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signature);
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case SIGN_RSA_EMSA_PKCS1_SHA2_384:
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return verify_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA384, data,
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signature);
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case SIGN_RSA_EMSA_PKCS1_SHA2_512:
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return verify_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA512, data,
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signature);
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case SIGN_RSA_EMSA_PKCS1_SHA1:
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return verify_emsa_pkcs1_signature(this, WC_HASH_TYPE_SHA, data,
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signature);
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case SIGN_RSA_EMSA_PKCS1_MD5:
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return verify_emsa_pkcs1_signature(this, WC_HASH_TYPE_MD5, data,
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signature);
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#ifdef WC_RSA_PSS
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case SIGN_RSA_EMSA_PSS:
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return verify_emsa_pss_signature(this, params, data, signature);
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#endif
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default:
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DBG1(DBG_LIB, "signature scheme %N not supported in RSA",
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signature_scheme_names, scheme);
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return FALSE;
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}
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}
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METHOD(public_key_t, encrypt, bool,
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private_wolfssl_rsa_public_key_t *this, encryption_scheme_t scheme,
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chunk_t plain, chunk_t *crypto)
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{
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int padding, mgf, len;
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enum wc_HashType hash;
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char *encrypted;
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switch (scheme)
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{
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case ENCRYPT_RSA_PKCS1:
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padding = WC_RSA_PKCSV15_PAD;
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hash = WC_HASH_TYPE_NONE;
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mgf = WC_MGF1NONE;
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break;
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#ifndef WC_NO_RSA_OAEP
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#ifndef NO_SHA
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case ENCRYPT_RSA_OAEP_SHA1:
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padding = WC_RSA_OAEP_PAD;
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hash = WC_HASH_TYPE_SHA;
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mgf = WC_MGF1SHA1;
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break;
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#endif
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#ifdef WOLFSSL_SHA224
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case ENCRYPT_RSA_OAEP_SHA224:
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padding = WC_RSA_OAEP_PAD;
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hash = WC_HASH_TYPE_SHA224;
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mgf = WC_MGF1SHA224;
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break;
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#endif
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#ifndef NO_SHA256
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case ENCRYPT_RSA_OAEP_SHA256:
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padding = WC_RSA_OAEP_PAD;
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hash = WC_HASH_TYPE_SHA256;
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mgf = WC_MGF1SHA256;
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break;
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#endif
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#ifdef WOLFSSL_SHA384
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case ENCRYPT_RSA_OAEP_SHA384:
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padding = WC_RSA_OAEP_PAD;
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hash = WC_HASH_TYPE_SHA384;
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mgf = WC_MGF1SHA384;
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break;
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#endif
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#ifdef WOLFSSL_SHA512
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case ENCRYPT_RSA_OAEP_SHA512:
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padding = WC_RSA_OAEP_PAD;
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hash = WC_HASH_TYPE_SHA512;
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mgf = WC_MGF1SHA512;
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break;
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#endif
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#endif
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default:
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DBG1(DBG_LIB, "decryption scheme %N not supported via wolfssl",
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encryption_scheme_names, scheme);
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return FALSE;
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}
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len = wc_RsaEncryptSize(&this->rsa);
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encrypted = malloc(len);
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len = wc_RsaPublicEncrypt_ex(plain.ptr, plain.len, encrypted, len,
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&this->rsa, &this->rng, padding, hash, mgf,
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NULL, 0);
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if (len < 0)
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{
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DBG1(DBG_LIB, "RSA encryption failed");
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free(encrypted);
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return FALSE;
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}
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*crypto = chunk_create(encrypted, len);
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return TRUE;
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}
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METHOD(public_key_t, get_keysize, int,
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private_wolfssl_rsa_public_key_t *this)
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{
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return wc_RsaEncryptSize(&this->rsa) * 8;
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}
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/**
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* Calculate fingerprint from a RSA key, also used in rsa private key.
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*/
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bool wolfssl_rsa_fingerprint(RsaKey *rsa, cred_encoding_type_t type,
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chunk_t *fp)
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{
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hasher_t *hasher;
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chunk_t key;
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int len;
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if (lib->encoding->get_cache(lib->encoding, type, rsa, fp))
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{
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return TRUE;
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}
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switch (type)
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{
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case KEYID_PUBKEY_SHA1:
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len = wc_RsaEncryptSize(rsa) * 2 + 20;
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key = chunk_alloc(len);
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len = wc_RsaKeyToPublicDer(rsa, key.ptr, len);
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break;
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default:
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{
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chunk_t n = chunk_empty, e = chunk_empty;
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bool success = FALSE;
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if (wolfssl_mp2chunk(&rsa->n, &n) && wolfssl_mp2chunk(&rsa->e, &e))
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{
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success = lib->encoding->encode(lib->encoding, type, rsa, fp,
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CRED_PART_RSA_MODULUS, n,
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CRED_PART_RSA_PUB_EXP, e, CRED_PART_END);
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}
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chunk_free(&n);
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chunk_free(&e);
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return success;
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}
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}
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if (len < 0)
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{
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chunk_free(&key);
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return FALSE;
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}
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key.len = len;
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hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
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if (!hasher || !hasher->allocate_hash(hasher, key, fp))
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{
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DBG1(DBG_LIB, "SHA1 hash algorithm not supported, fingerprinting failed");
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DESTROY_IF(hasher);
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free(key.ptr);
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return FALSE;
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}
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free(key.ptr);
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hasher->destroy(hasher);
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lib->encoding->cache(lib->encoding, type, rsa, *fp);
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return TRUE;
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}
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METHOD(public_key_t, get_fingerprint, bool,
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private_wolfssl_rsa_public_key_t *this, cred_encoding_type_t type,
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chunk_t *fingerprint)
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{
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return wolfssl_rsa_fingerprint(&this->rsa, type, fingerprint);
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}
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METHOD(public_key_t, get_encoding, bool,
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private_wolfssl_rsa_public_key_t *this, cred_encoding_type_t type,
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chunk_t *encoding)
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{
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bool success = FALSE;
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int len;
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switch (type)
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{
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case PUBKEY_ASN1_DER:
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len = wc_RsaEncryptSize(&this->rsa) * 2 + 20;
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*encoding = chunk_alloc(len);
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len = wc_RsaKeyToPublicDer(&this->rsa, encoding->ptr, len);
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if (len < 0)
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{
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DBG1(DBG_LIB, "Public Der failed, get encoding failed");
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chunk_free(encoding);
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return FALSE;
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}
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encoding->len = len;
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return TRUE;
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default:
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{
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chunk_t n = chunk_empty, e = chunk_empty;
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if (wolfssl_mp2chunk(&this->rsa.n, &n) &&
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wolfssl_mp2chunk(&this->rsa.e, &e))
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{
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success = lib->encoding->encode(lib->encoding, type, NULL,
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encoding, CRED_PART_RSA_MODULUS, n,
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CRED_PART_RSA_PUB_EXP, e, CRED_PART_END);
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}
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chunk_free(&n);
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chunk_free(&e);
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return success;
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}
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}
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}
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METHOD(public_key_t, get_ref, public_key_t*,
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private_wolfssl_rsa_public_key_t *this)
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{
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ref_get(&this->ref);
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return &this->public.key;
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}
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METHOD(public_key_t, destroy, void,
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private_wolfssl_rsa_public_key_t *this)
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{
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if (ref_put(&this->ref))
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{
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lib->encoding->clear_cache(lib->encoding, &this->rsa);
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wc_FreeRsaKey(&this->rsa);
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wc_FreeRng(&this->rng);
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free(this);
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}
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}
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/**
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* Generic private constructor
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*/
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static private_wolfssl_rsa_public_key_t *create_empty()
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{
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private_wolfssl_rsa_public_key_t *this;
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INIT(this,
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.public = {
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.key = {
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.get_type = _get_type,
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.verify = _verify,
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.encrypt = _encrypt,
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.equals = public_key_equals,
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.get_keysize = _get_keysize,
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.get_fingerprint = _get_fingerprint,
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.has_fingerprint = public_key_has_fingerprint,
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.get_encoding = _get_encoding,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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},
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.ref = 1,
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);
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if (wc_InitRng(&this->rng) != 0)
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{
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DBG1(DBG_LIB, "Init RNG, rsa public key load failed");
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free(this);
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return NULL;
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}
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if (wc_InitRsaKey(&this->rsa, NULL) != 0)
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{
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DBG1(DBG_LIB, "Init RSA, rsa public key load failed");
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wc_FreeRng(&this->rng);
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free(this);
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return NULL;
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}
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return this;
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}
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/**
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* See header.
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*/
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wolfssl_rsa_public_key_t *wolfssl_rsa_public_key_load(key_type_t type,
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va_list args)
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{
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private_wolfssl_rsa_public_key_t *this;
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chunk_t blob, n, e;
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word32 idx;
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n = e = blob = chunk_empty;
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while (TRUE)
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{
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switch (va_arg(args, builder_part_t))
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{
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case BUILD_BLOB_ASN1_DER:
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blob = va_arg(args, chunk_t);
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continue;
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case BUILD_RSA_MODULUS:
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n = va_arg(args, chunk_t);
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continue;
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case BUILD_RSA_PUB_EXP:
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e = va_arg(args, chunk_t);
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continue;
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case BUILD_END:
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break;
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default:
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return NULL;
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}
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break;
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}
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||||
this = create_empty();
|
||||
if (this == NULL)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (blob.ptr)
|
||||
{
|
||||
switch (type)
|
||||
{
|
||||
case KEY_ANY:
|
||||
case KEY_RSA:
|
||||
idx = 0;
|
||||
if (wc_RsaPublicKeyDecode(blob.ptr, &idx, &this->rsa,
|
||||
blob.len) != 0)
|
||||
{
|
||||
DBG1(DBG_LIB, "Public , rsa public key load failed");
|
||||
destroy(this);
|
||||
return NULL;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
destroy(this);
|
||||
return NULL;
|
||||
}
|
||||
return &this->public;
|
||||
}
|
||||
else if (n.ptr && e.ptr && type == KEY_RSA)
|
||||
{
|
||||
if (wc_RsaPublicKeyDecodeRaw(n.ptr, n.len, e.ptr, e.len,
|
||||
&this->rsa) != 0)
|
||||
{
|
||||
destroy(this);
|
||||
return NULL;
|
||||
}
|
||||
return &this->public;
|
||||
}
|
||||
destroy(this);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#endif /* NO_RSA */
|
||||
Reference in New Issue
Block a user