test/aesgcmtest.c

   1 /*
   2  * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/evp.h>
  11 #include "testutil.h"
  12
  13 static const unsigned char gcm_key[] = {
  14     0xee, 0xbc, 0x1f, 0x57, 0x48, 0x7f, 0x51, 0x92, 0x1c, 0x04, 0x65, 0x66,
  15     0x5f, 0x8a, 0xe6, 0xd1, 0x65, 0x8b, 0xb2, 0x6d, 0xe6, 0xf8, 0xa0, 0x69,
  16     0xa3, 0x52, 0x02, 0x93, 0xa5, 0x72, 0x07, 0x8f
  17 };
  18 static const unsigned char gcm_iv[] = {
  19     0x99, 0xaa, 0x3e, 0x68, 0xed, 0x81, 0x73, 0xa0, 0xee, 0xd0, 0x66, 0x84
  20 };
  21 static const unsigned char gcm_pt[] = {
  22     0xf5, 0x6e, 0x87, 0x05, 0x5b, 0xc3, 0x2d, 0x0e, 0xeb, 0x31, 0xb2, 0xea,
  23     0xcc, 0x2b, 0xf2, 0xa5
  24 };
  25 static const unsigned char gcm_aad[] = {
  26     0x4d, 0x23, 0xc3, 0xce, 0xc3, 0x34, 0xb4, 0x9b, 0xdb, 0x37, 0x0c, 0x43,
  27     0x7f, 0xec, 0x78, 0xde
  28 };
  29 static const unsigned char gcm_ct[] = {
  30     0xf7, 0x26, 0x44, 0x13, 0xa8, 0x4c, 0x0e, 0x7c, 0xd5, 0x36, 0x86, 0x7e,
  31     0xb9, 0xf2, 0x17, 0x36
  32 };
  33 static const unsigned char gcm_tag[] = {
  34     0x67, 0xba, 0x05, 0x10, 0x26, 0x2a, 0xe4, 0x87, 0xd7, 0x37, 0xee, 0x62,
  35     0x98, 0xf7, 0x7e, 0x0c
  36 };
  37
  38 static int do_encrypt(unsigned char *iv_gen, unsigned char *ct, int *ct_len,
  39                       unsigned char *tag, int *tag_len)
  40 {
  41     int ret = 0;
  42     EVP_CIPHER_CTX *ctx = NULL;
  43     int outlen;
  44     unsigned char outbuf[64];
  45
  46     *tag_len = 16;
  47     ret = TEST_ptr(ctx = EVP_CIPHER_CTX_new())
  48           && TEST_true(EVP_EncryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL,
  49                                           NULL) > 0)
  50           && TEST_true(EVP_EncryptInit_ex(ctx, NULL, NULL, gcm_key,
  51                                           iv_gen != NULL ? NULL : gcm_iv) > 0)
  52           && TEST_true(EVP_EncryptUpdate(ctx, NULL, &outlen, gcm_aad,
  53                                          sizeof(gcm_aad)) > 0)
  54           && TEST_true(EVP_EncryptUpdate(ctx, ct, ct_len, gcm_pt,
  55                                          sizeof(gcm_pt)) > 0)
  56           && TEST_true(EVP_EncryptFinal_ex(ctx, outbuf, &outlen) > 0)
  57           && TEST_int_eq(EVP_CIPHER_CTX_tag_length(ctx), 16)
  58           && TEST_true(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, 16,
  59                                            tag) > 0)
  60           && TEST_true(iv_gen == NULL
  61                   || EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GET_IV, 12, iv_gen) > 0);
  62     EVP_CIPHER_CTX_free(ctx);
  63     return ret;
  64 }
  65
  66 static int do_decrypt(const unsigned char *iv, const unsigned char *ct,
  67                       int ct_len, const unsigned char *tag, int tag_len)
  68 {
  69     int ret = 0;
  70     EVP_CIPHER_CTX *ctx = NULL;
  71     int outlen, ptlen;
  72     unsigned char pt[32];
  73     unsigned char outbuf[32];
  74
  75     ret = TEST_ptr(ctx = EVP_CIPHER_CTX_new())
  76               && TEST_true(EVP_DecryptInit_ex(ctx, EVP_aes_256_gcm(), NULL,
  77                                               NULL, NULL) > 0)
  78               && TEST_true(EVP_DecryptInit_ex(ctx, NULL, NULL, gcm_key, iv) > 0)
  79               && TEST_int_eq(EVP_CIPHER_CTX_tag_length(ctx), 16)
  80               && TEST_true(EVP_DecryptUpdate(ctx, NULL, &outlen, gcm_aad,
  81                                              sizeof(gcm_aad)) > 0)
  82               && TEST_true(EVP_DecryptUpdate(ctx, pt, &ptlen, ct,
  83                                              ct_len) > 0)
  84               && TEST_true(EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG,
  85                                                tag_len, (void *)tag) > 0)
  86               && TEST_true(EVP_DecryptFinal_ex(ctx, outbuf, &outlen) > 0)
  87               && TEST_mem_eq(gcm_pt, sizeof(gcm_pt), pt, ptlen);
  88
  89     EVP_CIPHER_CTX_free(ctx);
  90     return ret;
  91 }
  92
  93 static int kat_test(void)
  94 {
  95     unsigned char tag[32];
  96     unsigned char ct[32];
  97     int ctlen = 0, taglen = 0;
  98
  99     return do_encrypt(NULL, ct, &ctlen, tag, &taglen)
 100            && TEST_mem_eq(gcm_ct, sizeof(gcm_ct), ct, ctlen)
 101            && TEST_mem_eq(gcm_tag, sizeof(gcm_tag), tag, taglen)
 102            && do_decrypt(gcm_iv, ct, ctlen, tag, taglen);
 103 }
 104
 105 static int badkeylen_test(void)
 106 {
 107     int ret;
 108     EVP_CIPHER_CTX *ctx = NULL;
 109     const EVP_CIPHER *cipher;
 110
 111     ret = TEST_ptr(cipher = EVP_aes_192_gcm())
 112           && TEST_ptr(ctx = EVP_CIPHER_CTX_new())
 113           && TEST_true(EVP_EncryptInit_ex(ctx, cipher, NULL, NULL, NULL))
 114           && TEST_false(EVP_CIPHER_CTX_set_key_length(ctx, 2));
 115     EVP_CIPHER_CTX_free(ctx);
 116     return ret;
 117 }
 118
 119 #ifdef FIPS_MODE
 120 static int ivgen_test(void)
 121 {
 122     unsigned char iv_gen[16];
 123     unsigned char tag[32];
 124     unsigned char ct[32];
 125     int ctlen = 0, taglen = 0;
 126
 127     return do_encrypt(iv_gen, ct, &ctlen, tag, &taglen)
 128            && do_decrypt(iv_gen, ct, ctlen, tag, taglen);
 129 }
 130 #endif /* FIPS_MODE */
 131
 132 int setup_tests(void)
 133 {
 134     ADD_TEST(kat_test);
 135     ADD_TEST(badkeylen_test);
 136 #ifdef FIPS_MODE
 137     ADD_TEST(ivgen_test);
 138 #endif /* FIPS_MODE */
 139     return 1;
 140 }