1/* 2 * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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/* 11 * Simple AES CCM test program, uses the same NIST data used for the FIPS 12 * self test but uses the application level EVP APIs. 13 */ 14#include <stdio.h> 15#include <openssl/bio.h> 16#include <openssl/evp.h> 17 18/* AES-CCM test data from NIST public test vectors */ 19 20static const unsigned char ccm_key[] = { 21 0xce, 0xb0, 0x09, 0xae, 0xa4, 0x45, 0x44, 0x51, 0xfe, 0xad, 0xf0, 0xe6, 22 0xb3, 0x6f, 0x45, 0x55, 0x5d, 0xd0, 0x47, 0x23, 0xba, 0xa4, 0x48, 0xe8 23}; 24 25static const unsigned char ccm_nonce[] = { 26 0x76, 0x40, 0x43, 0xc4, 0x94, 0x60, 0xb7 27}; 28 29static const unsigned char ccm_adata[] = { 30 0x6e, 0x80, 0xdd, 0x7f, 0x1b, 0xad, 0xf3, 0xa1, 0xc9, 0xab, 0x25, 0xc7, 31 0x5f, 0x10, 0xbd, 0xe7, 0x8c, 0x23, 0xfa, 0x0e, 0xb8, 0xf9, 0xaa, 0xa5, 32 0x3a, 0xde, 0xfb, 0xf4, 0xcb, 0xf7, 0x8f, 0xe4 33}; 34 35static const unsigned char ccm_pt[] = { 36 0xc8, 0xd2, 0x75, 0xf9, 0x19, 0xe1, 0x7d, 0x7f, 0xe6, 0x9c, 0x2a, 0x1f, 37 0x58, 0x93, 0x9d, 0xfe, 0x4d, 0x40, 0x37, 0x91, 0xb5, 0xdf, 0x13, 0x10 38}; 39 40static const unsigned char ccm_ct[] = { 41 0x8a, 0x0f, 0x3d, 0x82, 0x29, 0xe4, 0x8e, 0x74, 0x87, 0xfd, 0x95, 0xa2, 42 0x8a, 0xd3, 0x92, 0xc8, 0x0b, 0x36, 0x81, 0xd4, 0xfb, 0xc7, 0xbb, 0xfd 43}; 44 45static const unsigned char ccm_tag[] = { 46 0x2d, 0xd6, 0xef, 0x1c, 0x45, 0xd4, 0xcc, 0xb7, 0x23, 0xdc, 0x07, 0x44, 47 0x14, 0xdb, 0x50, 0x6d 48}; 49 50void aes_ccm_encrypt(void) 51{ 52 EVP_CIPHER_CTX *ctx; 53 int outlen, tmplen; 54 unsigned char outbuf[1024]; 55 printf("AES CCM Encrypt:\n"); 56 printf("Plaintext:\n"); 57 BIO_dump_fp(stdout, ccm_pt, sizeof(ccm_pt)); 58 ctx = EVP_CIPHER_CTX_new(); 59 /* Set cipher type and mode */ 60 EVP_EncryptInit_ex(ctx, EVP_aes_192_ccm(), NULL, NULL, NULL); 61 /* Set nonce length if default 96 bits is not appropriate */ 62 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(ccm_nonce), 63 NULL); 64 /* Set tag length */ 65 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, sizeof(ccm_tag), NULL); 66 /* Initialise key and IV */ 67 EVP_EncryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce); 68 /* Set plaintext length: only needed if AAD is used */ 69 EVP_EncryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_pt)); 70 /* Zero or one call to specify any AAD */ 71 EVP_EncryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata)); 72 /* Encrypt plaintext: can only be called once */ 73 EVP_EncryptUpdate(ctx, outbuf, &outlen, ccm_pt, sizeof(ccm_pt)); 74 /* Output encrypted block */ 75 printf("Ciphertext:\n"); 76 BIO_dump_fp(stdout, outbuf, outlen); 77 /* Finalise: note get no output for CCM */ 78 EVP_EncryptFinal_ex(ctx, outbuf, &outlen); 79 /* Get tag */ 80 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, 16, outbuf); 81 /* Output tag */ 82 printf("Tag:\n"); 83 BIO_dump_fp(stdout, outbuf, 16); 84 EVP_CIPHER_CTX_free(ctx); 85} 86 87void aes_ccm_decrypt(void) 88{ 89 EVP_CIPHER_CTX *ctx; 90 int outlen, tmplen, rv; 91 unsigned char outbuf[1024]; 92 printf("AES CCM Derypt:\n"); 93 printf("Ciphertext:\n"); 94 BIO_dump_fp(stdout, ccm_ct, sizeof(ccm_ct)); 95 ctx = EVP_CIPHER_CTX_new(); 96 /* Select cipher */ 97 EVP_DecryptInit_ex(ctx, EVP_aes_192_ccm(), NULL, NULL, NULL); 98 /* Set nonce length, omit for 96 bits */ 99 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(ccm_nonce), 100 NULL); 101 /* Set expected tag value */ 102 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, 103 sizeof(ccm_tag), (void *)ccm_tag); 104 /* Specify key and IV */ 105 EVP_DecryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce); 106 /* Set ciphertext length: only needed if we have AAD */ 107 EVP_DecryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_ct)); 108 /* Zero or one call to specify any AAD */ 109 EVP_DecryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata)); 110 /* Decrypt plaintext, verify tag: can only be called once */ 111 rv = EVP_DecryptUpdate(ctx, outbuf, &outlen, ccm_ct, sizeof(ccm_ct)); 112 /* Output decrypted block: if tag verify failed we get nothing */ 113 if (rv > 0) { 114 printf("Plaintext:\n"); 115 BIO_dump_fp(stdout, outbuf, outlen); 116 } else 117 printf("Plaintext not available: tag verify failed.\n"); 118 EVP_CIPHER_CTX_free(ctx); 119} 120 121int main(int argc, char **argv) 122{ 123 aes_ccm_encrypt(); 124 aes_ccm_decrypt(); 125} 126