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e_ossltest.c
/* * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ /* * This is the OSSLTEST engine. It provides deliberately crippled digest * implementations for test purposes. It is highly insecure and must NOT be * used for any purpose except testing */ #include <stdio.h> #include <string.h> #include <openssl/engine.h> #include <openssl/sha.h> #include <openssl/md5.h> #include <openssl/rsa.h> #include <openssl/evp.h> #include <openssl/modes.h> #include <openssl/aes.h> #include <openssl/rand.h> #include <openssl/crypto.h> #include "e_ossltest_err.c" /* Engine Id and Name */ static const char *engine_ossltest_id = "ossltest"; static const char *engine_ossltest_name = "OpenSSL Test engine support"; /* Engine Lifetime functions */ static int ossltest_destroy(ENGINE *e); static int ossltest_init(ENGINE *e); static int ossltest_finish(ENGINE *e); void ENGINE_load_ossltest(void); /* Set up digests */ static int ossltest_digests(ENGINE *e, const EVP_MD **digest, const int **nids, int nid); static const RAND_METHOD *ossltest_rand_method(void); /* MD5 */ static int digest_md5_init(EVP_MD_CTX *ctx); static int digest_md5_update(EVP_MD_CTX *ctx, const void *data, size_t count); static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md); static EVP_MD *_hidden_md5_md = NULL; static const EVP_MD *digest_md5(void) { if (_hidden_md5_md == NULL) { EVP_MD *md; if ((md = EVP_MD_meth_new(NID_md5, NID_md5WithRSAEncryption)) == NULL || !EVP_MD_meth_set_result_size(md, MD5_DIGEST_LENGTH) || !EVP_MD_meth_set_input_blocksize(md, MD5_CBLOCK) || !EVP_MD_meth_set_app_datasize(md, sizeof(EVP_MD *) + sizeof(MD5_CTX)) || !EVP_MD_meth_set_flags(md, 0) || !EVP_MD_meth_set_init(md, digest_md5_init) || !EVP_MD_meth_set_update(md, digest_md5_update) || !EVP_MD_meth_set_final(md, digest_md5_final)) { EVP_MD_meth_free(md); md = NULL; } _hidden_md5_md = md; } return _hidden_md5_md; } /* SHA1 */ static int digest_sha1_init(EVP_MD_CTX *ctx); static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data, size_t count); static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md); static EVP_MD *_hidden_sha1_md = NULL; static const EVP_MD *digest_sha1(void) { if (_hidden_sha1_md == NULL) { EVP_MD *md; if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL || !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH) || !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK) || !EVP_MD_meth_set_app_datasize(md, sizeof(EVP_MD *) + sizeof(SHA_CTX)) || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT) || !EVP_MD_meth_set_init(md, digest_sha1_init) || !EVP_MD_meth_set_update(md, digest_sha1_update) || !EVP_MD_meth_set_final(md, digest_sha1_final)) { EVP_MD_meth_free(md); md = NULL; } _hidden_sha1_md = md; } return _hidden_sha1_md; } /* SHA256 */ static int digest_sha256_init(EVP_MD_CTX *ctx); static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data, size_t count); static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md); static EVP_MD *_hidden_sha256_md = NULL; static const EVP_MD *digest_sha256(void) { if (_hidden_sha256_md == NULL) { EVP_MD *md; if ((md = EVP_MD_meth_new(NID_sha256, NID_sha256WithRSAEncryption)) == NULL || !EVP_MD_meth_set_result_size(md, SHA256_DIGEST_LENGTH) || !EVP_MD_meth_set_input_blocksize(md, SHA256_CBLOCK) || !EVP_MD_meth_set_app_datasize(md, sizeof(EVP_MD *) + sizeof(SHA256_CTX)) || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT) || !EVP_MD_meth_set_init(md, digest_sha256_init) || !EVP_MD_meth_set_update(md, digest_sha256_update) || !EVP_MD_meth_set_final(md, digest_sha256_final)) { EVP_MD_meth_free(md); md = NULL; } _hidden_sha256_md = md; } return _hidden_sha256_md; } /* SHA384/SHA512 */ static int digest_sha384_init(EVP_MD_CTX *ctx); static int digest_sha512_init(EVP_MD_CTX *ctx); static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data, size_t count); static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md); static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md); static EVP_MD *_hidden_sha384_md = NULL; static const EVP_MD *digest_sha384(void) { if (_hidden_sha384_md == NULL) { EVP_MD *md; if ((md = EVP_MD_meth_new(NID_sha384, NID_sha384WithRSAEncryption)) == NULL || !EVP_MD_meth_set_result_size(md, SHA384_DIGEST_LENGTH) || !EVP_MD_meth_set_input_blocksize(md, SHA512_CBLOCK) || !EVP_MD_meth_set_app_datasize(md, sizeof(EVP_MD *) + sizeof(SHA512_CTX)) || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT) || !EVP_MD_meth_set_init(md, digest_sha384_init) || !EVP_MD_meth_set_update(md, digest_sha512_update) || !EVP_MD_meth_set_final(md, digest_sha384_final)) { EVP_MD_meth_free(md); md = NULL; } _hidden_sha384_md = md; } return _hidden_sha384_md; } static EVP_MD *_hidden_sha512_md = NULL; static const EVP_MD *digest_sha512(void) { if (_hidden_sha512_md == NULL) { EVP_MD *md; if ((md = EVP_MD_meth_new(NID_sha512, NID_sha512WithRSAEncryption)) == NULL || !EVP_MD_meth_set_result_size(md, SHA512_DIGEST_LENGTH) || !EVP_MD_meth_set_input_blocksize(md, SHA512_CBLOCK) || !EVP_MD_meth_set_app_datasize(md, sizeof(EVP_MD *) + sizeof(SHA512_CTX)) || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT) || !EVP_MD_meth_set_init(md, digest_sha512_init) || !EVP_MD_meth_set_update(md, digest_sha512_update) || !EVP_MD_meth_set_final(md, digest_sha512_final)) { EVP_MD_meth_free(md); md = NULL; } _hidden_sha512_md = md; } return _hidden_sha512_md; } static void destroy_digests(void) { EVP_MD_meth_free(_hidden_md5_md); _hidden_md5_md = NULL; EVP_MD_meth_free(_hidden_sha1_md); _hidden_sha1_md = NULL; EVP_MD_meth_free(_hidden_sha256_md); _hidden_sha256_md = NULL; EVP_MD_meth_free(_hidden_sha384_md); _hidden_sha384_md = NULL; EVP_MD_meth_free(_hidden_sha512_md); _hidden_sha512_md = NULL; } static int ossltest_digest_nids(const int **nids) { static int digest_nids[6] = { 0, 0, 0, 0, 0, 0 }; static int pos = 0; static int init = 0; if (!init) { const EVP_MD *md; if ((md = digest_md5()) != NULL) digest_nids[pos++] = EVP_MD_type(md); if ((md = digest_sha1()) != NULL) digest_nids[pos++] = EVP_MD_type(md); if ((md = digest_sha256()) != NULL) digest_nids[pos++] = EVP_MD_type(md); if ((md = digest_sha384()) != NULL) digest_nids[pos++] = EVP_MD_type(md); if ((md = digest_sha512()) != NULL) digest_nids[pos++] = EVP_MD_type(md); digest_nids[pos] = 0; init = 1; } *nids = digest_nids; return pos; } /* Setup ciphers */ static int ossltest_ciphers(ENGINE *, const EVP_CIPHER **, const int **, int); static int ossltest_cipher_nids[] = { NID_aes_128_cbc, NID_aes_128_gcm, 0 }; /* AES128 */ int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc); int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl); int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc); int ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl); static int ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr); static EVP_CIPHER *_hidden_aes_128_cbc = NULL; static const EVP_CIPHER *ossltest_aes_128_cbc(void) { if (_hidden_aes_128_cbc == NULL && ((_hidden_aes_128_cbc = EVP_CIPHER_meth_new(NID_aes_128_cbc, 16 /* block size */, 16 /* key len */)) == NULL || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc,16) || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc, EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CBC_MODE) || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc, ossltest_aes128_init_key) || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc, ossltest_aes128_cbc_cipher) || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc, EVP_CIPHER_impl_ctx_size(EVP_aes_128_cbc())))) { EVP_CIPHER_meth_free(_hidden_aes_128_cbc); _hidden_aes_128_cbc = NULL; } return _hidden_aes_128_cbc; } static EVP_CIPHER *_hidden_aes_128_gcm = NULL; #define AES_GCM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ | EVP_CIPH_CUSTOM_COPY |EVP_CIPH_FLAG_AEAD_CIPHER \ | EVP_CIPH_GCM_MODE) static const EVP_CIPHER *ossltest_aes_128_gcm(void) { if (_hidden_aes_128_gcm == NULL && ((_hidden_aes_128_gcm = EVP_CIPHER_meth_new(NID_aes_128_gcm, 1 /* block size */, 16 /* key len */)) == NULL || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_gcm,12) || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_gcm, AES_GCM_FLAGS) || !EVP_CIPHER_meth_set_init(_hidden_aes_128_gcm, ossltest_aes128_gcm_init_key) || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_gcm, ossltest_aes128_gcm_cipher) || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_gcm, ossltest_aes128_gcm_ctrl) || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_gcm, EVP_CIPHER_impl_ctx_size(EVP_aes_128_gcm())))) { EVP_CIPHER_meth_free(_hidden_aes_128_gcm); _hidden_aes_128_gcm = NULL; } return _hidden_aes_128_gcm; } static void destroy_ciphers(void) { EVP_CIPHER_meth_free(_hidden_aes_128_cbc); EVP_CIPHER_meth_free(_hidden_aes_128_gcm); _hidden_aes_128_cbc = NULL; } static int bind_ossltest(ENGINE *e) { /* Ensure the ossltest error handling is set up */ ERR_load_OSSLTEST_strings(); if (!ENGINE_set_id(e, engine_ossltest_id) || !ENGINE_set_name(e, engine_ossltest_name) || !ENGINE_set_digests(e, ossltest_digests) || !ENGINE_set_ciphers(e, ossltest_ciphers) || !ENGINE_set_RAND(e, ossltest_rand_method()) || !ENGINE_set_destroy_function(e, ossltest_destroy) || !ENGINE_set_init_function(e, ossltest_init) || !ENGINE_set_finish_function(e, ossltest_finish)) { OSSLTESTerr(OSSLTEST_F_BIND_OSSLTEST, OSSLTEST_R_INIT_FAILED); return 0; } return 1; } #ifndef OPENSSL_NO_DYNAMIC_ENGINE static int bind_helper(ENGINE *e, const char *id) { if (id && (strcmp(id, engine_ossltest_id) != 0)) return 0; if (!bind_ossltest(e)) return 0; return 1; } IMPLEMENT_DYNAMIC_CHECK_FN() IMPLEMENT_DYNAMIC_BIND_FN(bind_helper) #endif static ENGINE *engine_ossltest(void) { ENGINE *ret = ENGINE_new(); if (ret == NULL) return NULL; if (!bind_ossltest(ret)) { ENGINE_free(ret); return NULL; } return ret; } void ENGINE_load_ossltest(void) { /* Copied from eng_[openssl|dyn].c */ ENGINE *toadd = engine_ossltest(); if (!toadd) return; ENGINE_add(toadd); ENGINE_free(toadd); ERR_clear_error(); } static int ossltest_init(ENGINE *e) { return 1; } static int ossltest_finish(ENGINE *e) { return 1; } static int ossltest_destroy(ENGINE *e) { destroy_digests(); destroy_ciphers(); ERR_unload_OSSLTEST_strings(); return 1; } static int ossltest_digests(ENGINE *e, const EVP_MD **digest, const int **nids, int nid) { int ok = 1; if (!digest) { /* We are returning a list of supported nids */ return ossltest_digest_nids(nids); } /* We are being asked for a specific digest */ switch (nid) { case NID_md5: *digest = digest_md5(); break; case NID_sha1: *digest = digest_sha1(); break; case NID_sha256: *digest = digest_sha256(); break; case NID_sha384: *digest = digest_sha384(); break; case NID_sha512: *digest = digest_sha512(); break; default: ok = 0; *digest = NULL; break; } return ok; } static int ossltest_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid) { int ok = 1; if (!cipher) { /* We are returning a list of supported nids */ *nids = ossltest_cipher_nids; return (sizeof(ossltest_cipher_nids) - 1) / sizeof(ossltest_cipher_nids[0]); } /* We are being asked for a specific cipher */ switch (nid) { case NID_aes_128_cbc: *cipher = ossltest_aes_128_cbc(); break; case NID_aes_128_gcm: *cipher = ossltest_aes_128_gcm(); break; default: ok = 0; *cipher = NULL; break; } return ok; } static void fill_known_data(unsigned char *md, unsigned int len) { unsigned int i; for (i=0; i<len; i++) { md[i] = (unsigned char)(i & 0xff); } } /* * MD5 implementation. We go through the motions of doing MD5 by deferring to * the standard implementation. Then we overwrite the result with a will defined * value, so that all "MD5" digests using the test engine always end up with * the same value. */ #undef data #define data(ctx) ((MD5_CTX *)EVP_MD_CTX_md_data(ctx)) static int digest_md5_init(EVP_MD_CTX *ctx) { return MD5_Init(data(ctx)); } static int digest_md5_update(EVP_MD_CTX *ctx, const void *data, size_t count) { return MD5_Update(data(ctx), data, (size_t)count); } static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret; ret = MD5_Final(md, data(ctx)); if (ret > 0) { fill_known_data(md, MD5_DIGEST_LENGTH); } return ret; } /* * SHA1 implementation. */ #undef data #define data(ctx) ((SHA_CTX *)EVP_MD_CTX_md_data(ctx)) static int digest_sha1_init(EVP_MD_CTX *ctx) { return SHA1_Init(data(ctx)); } static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data, size_t count) { return SHA1_Update(data(ctx), data, (size_t)count); } static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret; ret = SHA1_Final(md, data(ctx)); if (ret > 0) { fill_known_data(md, SHA_DIGEST_LENGTH); } return ret; } /* * SHA256 implementation. */ #undef data #define data(ctx) ((SHA256_CTX *)EVP_MD_CTX_md_data(ctx)) static int digest_sha256_init(EVP_MD_CTX *ctx) { return SHA256_Init(data(ctx)); } static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data, size_t count) { return SHA256_Update(data(ctx), data, (size_t)count); } static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret; ret = SHA256_Final(md, data(ctx)); if (ret > 0) { fill_known_data(md, SHA256_DIGEST_LENGTH); } return ret; } /* * SHA384/512 implementation. */ #undef data #define data(ctx) ((SHA512_CTX *)EVP_MD_CTX_md_data(ctx)) static int digest_sha384_init(EVP_MD_CTX *ctx) { return SHA384_Init(data(ctx)); } static int digest_sha512_init(EVP_MD_CTX *ctx) { return SHA512_Init(data(ctx)); } static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data, size_t count) { return SHA512_Update(data(ctx), data, (size_t)count); } static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret; /* Actually uses SHA512_Final! */ ret = SHA512_Final(md, data(ctx)); if (ret > 0) { fill_known_data(md, SHA384_DIGEST_LENGTH); } return ret; } static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret; ret = SHA512_Final(md, data(ctx)); if (ret > 0) { fill_known_data(md, SHA512_DIGEST_LENGTH); } return ret; } /* * AES128 Implementation */ int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc) { return EVP_CIPHER_meth_get_init(EVP_aes_128_cbc()) (ctx, key, iv, enc); } int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) { unsigned char *tmpbuf; int ret; tmpbuf = OPENSSL_malloc(inl); /* OPENSSL_malloc will return NULL if inl == 0 */ if (tmpbuf == NULL && inl > 0) return -1; /* Remember what we were asked to encrypt */ if (tmpbuf != NULL) memcpy(tmpbuf, in, inl); /* Go through the motions of encrypting it */ ret = EVP_CIPHER_meth_get_do_cipher(EVP_aes_128_cbc())(ctx, out, in, inl); /* Throw it all away and just use the plaintext as the output */ if (tmpbuf != NULL) memcpy(out, tmpbuf, inl); OPENSSL_free(tmpbuf); return ret; } int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc) { return EVP_CIPHER_meth_get_init(EVP_aes_128_gcm()) (ctx, key, iv, enc); } int ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) { unsigned char *tmpbuf = OPENSSL_malloc(inl); /* OPENSSL_malloc will return NULL if inl == 0 */ if (tmpbuf == NULL && inl > 0) return -1; /* Remember what we were asked to encrypt */ if (tmpbuf != NULL) memcpy(tmpbuf, in, inl); /* Go through the motions of encrypting it */ EVP_CIPHER_meth_get_do_cipher(EVP_aes_128_gcm())(ctx, out, in, inl); /* Throw it all away and just use the plaintext as the output */ if (tmpbuf != NULL && out != NULL) memcpy(out, tmpbuf, inl); OPENSSL_free(tmpbuf); return inl; } static int ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) { /* Pass the ctrl down */ int ret = EVP_CIPHER_meth_get_ctrl(EVP_aes_128_gcm())(ctx, type, arg, ptr); if (ret <= 0) return ret; switch(type) { case EVP_CTRL_AEAD_GET_TAG: /* Always give the same tag */ memset(ptr, 0, EVP_GCM_TLS_TAG_LEN); break; default: break; } return 1; } static int ossltest_rand_bytes(unsigned char *buf, int num) { unsigned char val = 1; while (--num >= 0) *buf++ = val++; return 1; } static int ossltest_rand_status(void) { return 1; } static const RAND_METHOD *ossltest_rand_method(void) { static RAND_METHOD osslt_rand_meth = { NULL, ossltest_rand_bytes, NULL, NULL, ossltest_rand_bytes, ossltest_rand_status }; return &osslt_rand_meth; }