| 1 | /*
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| 2 | * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /*
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| 11 | * Simple AES CCM test program, uses the same NIST data used for the FIPS
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| 12 | * self test but uses the application level EVP APIs.
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| 13 | */
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| 14 | #include <stdio.h>
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| 15 | #include <openssl/bio.h>
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| 16 | #include <openssl/evp.h>
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| 17 |
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| 18 | /* AES-CCM test data from NIST public test vectors */
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| 19 |
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| 20 | static const unsigned char ccm_key[] = {
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| 21 | 0xce, 0xb0, 0x09, 0xae, 0xa4, 0x45, 0x44, 0x51, 0xfe, 0xad, 0xf0, 0xe6,
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| 22 | 0xb3, 0x6f, 0x45, 0x55, 0x5d, 0xd0, 0x47, 0x23, 0xba, 0xa4, 0x48, 0xe8
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| 23 | };
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| 24 |
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| 25 | static const unsigned char ccm_nonce[] = {
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| 26 | 0x76, 0x40, 0x43, 0xc4, 0x94, 0x60, 0xb7
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| 27 | };
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| 28 |
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| 29 | static const unsigned char ccm_adata[] = {
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| 30 | 0x6e, 0x80, 0xdd, 0x7f, 0x1b, 0xad, 0xf3, 0xa1, 0xc9, 0xab, 0x25, 0xc7,
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| 31 | 0x5f, 0x10, 0xbd, 0xe7, 0x8c, 0x23, 0xfa, 0x0e, 0xb8, 0xf9, 0xaa, 0xa5,
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| 32 | 0x3a, 0xde, 0xfb, 0xf4, 0xcb, 0xf7, 0x8f, 0xe4
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| 33 | };
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| 34 |
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| 35 | static const unsigned char ccm_pt[] = {
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| 36 | 0xc8, 0xd2, 0x75, 0xf9, 0x19, 0xe1, 0x7d, 0x7f, 0xe6, 0x9c, 0x2a, 0x1f,
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| 37 | 0x58, 0x93, 0x9d, 0xfe, 0x4d, 0x40, 0x37, 0x91, 0xb5, 0xdf, 0x13, 0x10
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| 38 | };
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| 39 |
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| 40 | static const unsigned char ccm_ct[] = {
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| 41 | 0x8a, 0x0f, 0x3d, 0x82, 0x29, 0xe4, 0x8e, 0x74, 0x87, 0xfd, 0x95, 0xa2,
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| 42 | 0x8a, 0xd3, 0x92, 0xc8, 0x0b, 0x36, 0x81, 0xd4, 0xfb, 0xc7, 0xbb, 0xfd
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| 43 | };
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| 44 |
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| 45 | static const unsigned char ccm_tag[] = {
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| 46 | 0x2d, 0xd6, 0xef, 0x1c, 0x45, 0xd4, 0xcc, 0xb7, 0x23, 0xdc, 0x07, 0x44,
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| 47 | 0x14, 0xdb, 0x50, 0x6d
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| 48 | };
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| 49 |
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| 50 | void aes_ccm_encrypt(void)
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| 51 | {
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| 52 | EVP_CIPHER_CTX *ctx;
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| 53 | int outlen, tmplen;
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| 54 | unsigned char outbuf[1024];
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| 55 | printf("AES CCM Encrypt:\n");
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| 56 | printf("Plaintext:\n");
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| 57 | BIO_dump_fp(stdout, ccm_pt, sizeof(ccm_pt));
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| 58 | ctx = EVP_CIPHER_CTX_new();
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| 59 | /* Set cipher type and mode */
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| 60 | EVP_EncryptInit_ex(ctx, EVP_aes_192_ccm(), NULL, NULL, NULL);
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| 61 | /* Set nonce length if default 96 bits is not appropriate */
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| 62 | EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(ccm_nonce),
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| 63 | NULL);
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| 64 | /* Set tag length */
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| 65 | EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, sizeof(ccm_tag), NULL);
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| 66 | /* Initialise key and IV */
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| 67 | EVP_EncryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce);
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| 68 | /* Set plaintext length: only needed if AAD is used */
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| 69 | EVP_EncryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_pt));
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| 70 | /* Zero or one call to specify any AAD */
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| 71 | EVP_EncryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata));
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| 72 | /* Encrypt plaintext: can only be called once */
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| 73 | EVP_EncryptUpdate(ctx, outbuf, &outlen, ccm_pt, sizeof(ccm_pt));
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| 74 | /* Output encrypted block */
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| 75 | printf("Ciphertext:\n");
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| 76 | BIO_dump_fp(stdout, outbuf, outlen);
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| 77 | /* Finalise: note get no output for CCM */
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| 78 | EVP_EncryptFinal_ex(ctx, outbuf, &outlen);
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| 79 | /* Get tag */
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| 80 | EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, 16, outbuf);
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| 81 | /* Output tag */
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| 82 | printf("Tag:\n");
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| 83 | BIO_dump_fp(stdout, outbuf, 16);
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| 84 | EVP_CIPHER_CTX_free(ctx);
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| 85 | }
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| 86 |
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| 87 | void aes_ccm_decrypt(void)
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| 88 | {
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| 89 | EVP_CIPHER_CTX *ctx;
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| 90 | int outlen, tmplen, rv;
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| 91 | unsigned char outbuf[1024];
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| 92 | printf("AES CCM Derypt:\n");
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| 93 | printf("Ciphertext:\n");
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| 94 | BIO_dump_fp(stdout, ccm_ct, sizeof(ccm_ct));
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| 95 | ctx = EVP_CIPHER_CTX_new();
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| 96 | /* Select cipher */
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| 97 | EVP_DecryptInit_ex(ctx, EVP_aes_192_ccm(), NULL, NULL, NULL);
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| 98 | /* Set nonce length, omit for 96 bits */
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| 99 | EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(ccm_nonce),
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| 100 | NULL);
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| 101 | /* Set expected tag value */
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| 102 | EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG,
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| 103 | sizeof(ccm_tag), (void *)ccm_tag);
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| 104 | /* Specify key and IV */
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| 105 | EVP_DecryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce);
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| 106 | /* Set ciphertext length: only needed if we have AAD */
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| 107 | EVP_DecryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_ct));
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| 108 | /* Zero or one call to specify any AAD */
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| 109 | EVP_DecryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata));
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| 110 | /* Decrypt plaintext, verify tag: can only be called once */
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| 111 | rv = EVP_DecryptUpdate(ctx, outbuf, &outlen, ccm_ct, sizeof(ccm_ct));
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| 112 | /* Output decrypted block: if tag verify failed we get nothing */
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| 113 | if (rv > 0) {
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| 114 | printf("Plaintext:\n");
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| 115 | BIO_dump_fp(stdout, outbuf, outlen);
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| 116 | } else
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| 117 | printf("Plaintext not available: tag verify failed.\n");
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| 118 | EVP_CIPHER_CTX_free(ctx);
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| 119 | }
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| 120 |
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| 121 | int main(int argc, char **argv)
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| 122 | {
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| 123 | aes_ccm_encrypt();
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| 124 | aes_ccm_decrypt();
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| 125 | }
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