/* * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (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 */ /* We need to use some engine deprecated APIs */ #define OPENSSL_SUPPRESS_DEPRECATED /* * SHA low level APIs are deprecated for public use, but still ok for * internal use. Note, that due to symbols not being exported, only the * #defines and type definitions can be accessed, function calls are not * available. The digest lengths, block sizes and sizeof(CTX) are used herein * for several different digests. */ #include "internal/deprecated.h" #include #include #include "internal/common.h" /* for CHECK_AND_SKIP_CASE_PREFIX */ #include #include #include #include #include #include #include #include #include #include #include #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_sha384_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_init(EVP_MD_CTX *ctx); static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data, size_t count); 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_sha384_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_get_type(md); if ((md = digest_sha1()) != NULL) digest_nids[pos++] = EVP_MD_get_type(md); if ((md = digest_sha256()) != NULL) digest_nids[pos++] = EVP_MD_get_type(md); if ((md = digest_sha384()) != NULL) digest_nids[pos++] = EVP_MD_get_type(md); if ((md = digest_sha512()) != NULL) digest_nids[pos++] = EVP_MD_get_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, NID_aes_128_cbc_hmac_sha1, 0 }; /* AES128 */ static int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc); static int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl); static int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc); static 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 int ossltest_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc); static int ossltest_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl); static int ossltest_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr); typedef struct { size_t payload_length; /* AAD length in decrypt case */ unsigned int tls_ver; } EVP_AES_HMAC_SHA1; 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 EVP_CIPHER *_hidden_aes_128_cbc_hmac_sha1 = NULL; static const EVP_CIPHER *ossltest_aes_128_cbc_hmac_sha1(void) { if (_hidden_aes_128_cbc_hmac_sha1 == NULL && ((_hidden_aes_128_cbc_hmac_sha1 = EVP_CIPHER_meth_new(NID_aes_128_cbc_hmac_sha1, 16 /* block size */, 16 /* key len */)) == NULL || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc_hmac_sha1,16) || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc_hmac_sha1, EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_FLAG_AEAD_CIPHER) || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc_hmac_sha1, ossltest_aes128_cbc_hmac_sha1_init_key) || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc_hmac_sha1, ossltest_aes128_cbc_hmac_sha1_cipher) || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_cbc_hmac_sha1, ossltest_aes128_cbc_hmac_sha1_ctrl) || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_aes_128_cbc_hmac_sha1, EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv) || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_aes_128_cbc_hmac_sha1, EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv) || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc_hmac_sha1, sizeof(EVP_AES_HMAC_SHA1)))) { EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1); _hidden_aes_128_cbc_hmac_sha1 = NULL; } return _hidden_aes_128_cbc_hmac_sha1; } static void destroy_ciphers(void) { EVP_CIPHER_meth_free(_hidden_aes_128_cbc); EVP_CIPHER_meth_free(_hidden_aes_128_gcm); EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1); _hidden_aes_128_cbc = NULL; _hidden_aes_128_gcm = NULL; _hidden_aes_128_cbc_hmac_sha1 = NULL; } /* Key loading */ static EVP_PKEY *load_key(ENGINE *eng, const char *key_id, int pub, UI_METHOD *ui_method, void *ui_data) { BIO *in; EVP_PKEY *key; if (!CHECK_AND_SKIP_CASE_PREFIX(key_id, "ot:")) return NULL; fprintf(stderr, "[ossltest]Loading %s key %s\n", pub ? "Public" : "Private", key_id); in = BIO_new_file(key_id, "r"); if (!in) return NULL; if (pub) key = PEM_read_bio_PUBKEY(in, NULL, 0, NULL); else key = PEM_read_bio_PrivateKey(in, NULL, 0, NULL); BIO_free(in); return key; } static EVP_PKEY *ossltest_load_privkey(ENGINE *eng, const char *key_id, UI_METHOD *ui_method, void *ui_data) { return load_key(eng, key_id, 0, ui_method, ui_data); } static EVP_PKEY *ossltest_load_pubkey(ENGINE *eng, const char *key_id, UI_METHOD *ui_method, void *ui_data) { return load_key(eng, key_id, 1, ui_method, ui_data); } 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_load_privkey_function(e, ossltest_load_privkey) || !ENGINE_set_load_pubkey_function(e, ossltest_load_pubkey) || !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; case NID_aes_128_cbc_hmac_sha1: *cipher = ossltest_aes_128_cbc_hmac_sha1(); 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 0) { fill_known_data(md, MD5_DIGEST_LENGTH); } return ret; } /* * SHA1 implementation. */ static int digest_sha1_init(EVP_MD_CTX *ctx) { return EVP_MD_meth_get_init(EVP_sha1())(ctx); } static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data, size_t count) { return EVP_MD_meth_get_update(EVP_sha1())(ctx, data, count); } static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret = EVP_MD_meth_get_final(EVP_sha1())(ctx, md); if (ret > 0) { fill_known_data(md, SHA_DIGEST_LENGTH); } return ret; } /* * SHA256 implementation. */ static int digest_sha256_init(EVP_MD_CTX *ctx) { return EVP_MD_meth_get_init(EVP_sha256())(ctx); } static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data, size_t count) { return EVP_MD_meth_get_update(EVP_sha256())(ctx, data, count); } static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret = EVP_MD_meth_get_final(EVP_sha256())(ctx, md); if (ret > 0) { fill_known_data(md, SHA256_DIGEST_LENGTH); } return ret; } /* * SHA384 implementation. */ static int digest_sha384_init(EVP_MD_CTX *ctx) { return EVP_MD_meth_get_init(EVP_sha384())(ctx); } static int digest_sha384_update(EVP_MD_CTX *ctx, const void *data, size_t count) { return EVP_MD_meth_get_update(EVP_sha384())(ctx, data, count); } static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret = EVP_MD_meth_get_final(EVP_sha384())(ctx, md); if (ret > 0) { fill_known_data(md, SHA384_DIGEST_LENGTH); } return ret; } /* * SHA512 implementation. */ static int digest_sha512_init(EVP_MD_CTX *ctx) { return EVP_MD_meth_get_init(EVP_sha512())(ctx); } static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data, size_t count) { return EVP_MD_meth_get_update(EVP_sha512())(ctx, data, count); } static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md) { int ret = EVP_MD_meth_get_final(EVP_sha512())(ctx, md); if (ret > 0) { fill_known_data(md, SHA512_DIGEST_LENGTH); } return ret; } /* * AES128 Implementation */ static 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); } static 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; } static 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); } static 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; } #define NO_PAYLOAD_LENGTH ((size_t)-1) # define data(ctx) ((EVP_AES_HMAC_SHA1 *)EVP_CIPHER_CTX_get_cipher_data(ctx)) static int ossltest_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *inkey, const unsigned char *iv, int enc) { EVP_AES_HMAC_SHA1 *key = data(ctx); key->payload_length = NO_PAYLOAD_LENGTH; return 1; } static int ossltest_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t len) { EVP_AES_HMAC_SHA1 *key = data(ctx); unsigned int l; size_t plen = key->payload_length; key->payload_length = NO_PAYLOAD_LENGTH; if (len % AES_BLOCK_SIZE) return 0; if (EVP_CIPHER_CTX_is_encrypting(ctx)) { if (plen == NO_PAYLOAD_LENGTH) plen = len; else if (len != ((plen + SHA_DIGEST_LENGTH + AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)) return 0; memmove(out, in, plen); if (plen != len) { /* "TLS" mode of operation */ /* calculate HMAC and append it to payload */ fill_known_data(out + plen, SHA_DIGEST_LENGTH); /* pad the payload|hmac */ plen += SHA_DIGEST_LENGTH; for (l = len - plen - 1; plen < len; plen++) out[plen] = l; } } else { /* decrypt HMAC|padding at once */ memmove(out, in, len); if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */ unsigned int maxpad, pad; if (key->tls_ver >= TLS1_1_VERSION) { if (len < (AES_BLOCK_SIZE + SHA_DIGEST_LENGTH + 1)) return 0; /* omit explicit iv */ in += AES_BLOCK_SIZE; out += AES_BLOCK_SIZE; len -= AES_BLOCK_SIZE; } else if (len < (SHA_DIGEST_LENGTH + 1)) return 0; /* figure out payload length */ pad = out[len - 1]; maxpad = len - (SHA_DIGEST_LENGTH + 1); if (pad > maxpad) return 0; for (plen = len - pad - 1; plen < len; plen++) if (out[plen] != pad) return 0; } } return 1; } static int ossltest_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) { EVP_AES_HMAC_SHA1 *key = data(ctx); switch (type) { case EVP_CTRL_AEAD_SET_MAC_KEY: return 1; case EVP_CTRL_AEAD_TLS1_AAD: { unsigned char *p = ptr; unsigned int len; if (arg != EVP_AEAD_TLS1_AAD_LEN) return -1; len = p[arg - 2] << 8 | p[arg - 1]; key->tls_ver = p[arg - 4] << 8 | p[arg - 3]; if (EVP_CIPHER_CTX_is_encrypting(ctx)) { key->payload_length = len; if (key->tls_ver >= TLS1_1_VERSION) { if (len < AES_BLOCK_SIZE) return 0; len -= AES_BLOCK_SIZE; p[arg - 2] = len >> 8; p[arg - 1] = len; } return (int)(((len + SHA_DIGEST_LENGTH + AES_BLOCK_SIZE) & -AES_BLOCK_SIZE) - len); } else { key->payload_length = arg; return SHA_DIGEST_LENGTH; } } default: 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; }