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Fixes #14103 & #14102. Update AES demos with error handling and EVP fetch

Browse Source 
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/15081)
This commit is contained in:
Jon Spillett 2021-04-29 11:08:10 +10:00 committed by Shane Lontis
parent f505161e62
commit 3068a183ae
6 changed files with 470 additions and 248 deletions
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6
demos/README.txt
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@ -3,11 +3,13 @@ OpenSSL Demonstration Applications
This folder contains source code that demonstrates the proper use of the OpenSSL
library API.
bio: Demonstration of a simple TLS client and server.
bio: Demonstration of a simple TLS client and server
certs: Demonstration of creating certs, using OCSP
ciphers:
cipher:
aesgcm.c Demonstration of symmetric cipher GCM mode encrypt/decrypt
aesccm.c Demonstration of symmetric cipher CCM mode encrypt/decrypt
cms:

0
demos/evp/Makefile → demos/cipher/Makefile
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238
demos/cipher/aesccm.c Normal file
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@ -0,0 +1,238 @@
/*
* Copyright 2013-2021 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
*/
/*
* Simple AES CCM authenticated encryption with additional data (AEAD)
* demonstration program.
*/
#include <stdio.h>
#include <openssl/err.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/core_names.h>
/* AES-CCM test data obtained from NIST public test vectors */
/* AES key */
static const unsigned char ccm_key[] = {
0xce, 0xb0, 0x09, 0xae, 0xa4, 0x45, 0x44, 0x51, 0xfe, 0xad, 0xf0, 0xe6,
0xb3, 0x6f, 0x45, 0x55, 0x5d, 0xd0, 0x47, 0x23, 0xba, 0xa4, 0x48, 0xe8
};
/* Unique nonce to be used for this message */
static const unsigned char ccm_nonce[] = {
0x76, 0x40, 0x43, 0xc4, 0x94, 0x60, 0xb7
};
/*
* Example of Additional Authenticated Data (AAD), i.e. unencrypted data
* which can be authenticated using the generated Tag value.
*/
static const unsigned char ccm_adata[] = {
0x6e, 0x80, 0xdd, 0x7f, 0x1b, 0xad, 0xf3, 0xa1, 0xc9, 0xab, 0x25, 0xc7,
0x5f, 0x10, 0xbd, 0xe7, 0x8c, 0x23, 0xfa, 0x0e, 0xb8, 0xf9, 0xaa, 0xa5,
0x3a, 0xde, 0xfb, 0xf4, 0xcb, 0xf7, 0x8f, 0xe4
};
/* Example plaintext to encrypt */
static const unsigned char ccm_pt[] = {
0xc8, 0xd2, 0x75, 0xf9, 0x19, 0xe1, 0x7d, 0x7f, 0xe6, 0x9c, 0x2a, 0x1f,
0x58, 0x93, 0x9d, 0xfe, 0x4d, 0x40, 0x37, 0x91, 0xb5, 0xdf, 0x13, 0x10
};
/* Expected ciphertext value */
static const unsigned char ccm_ct[] = {
0x8a, 0x0f, 0x3d, 0x82, 0x29, 0xe4, 0x8e, 0x74, 0x87, 0xfd, 0x95, 0xa2,
0x8a, 0xd3, 0x92, 0xc8, 0x0b, 0x36, 0x81, 0xd4, 0xfb, 0xc7, 0xbb, 0xfd
};
/* Expected AEAD Tag value */
static const unsigned char ccm_tag[] = {
0x2d, 0xd6, 0xef, 0x1c, 0x45, 0xd4, 0xcc, 0xb7, 0x23, 0xdc, 0x07, 0x44,
0x14, 0xdb, 0x50, 0x6d
};
/*
* A library context and property query can be used to select & filter
* algorithm implementations. If they are NULL then the default library
* context and properties are used.
*/
OSSL_LIB_CTX *libctx = NULL;
const char *propq = NULL;
int aes_ccm_encrypt(void)
{
int ret = 0;
EVP_CIPHER_CTX *ctx;
EVP_CIPHER *cipher = NULL;
int outlen, tmplen;
size_t ccm_nonce_len = sizeof(ccm_nonce);
size_t ccm_tag_len = sizeof(ccm_tag);
unsigned char outbuf[1024];
unsigned char outtag[16];
OSSL_PARAM params[3] = {
OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
};
printf("AES CCM Encrypt:\n");
printf("Plaintext:\n");
BIO_dump_fp(stdout, ccm_pt, sizeof(ccm_pt));
/* Create a context for the encrypt operation */
if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
goto err;
/* Fetch the cipher implementation */
if ((cipher = EVP_CIPHER_fetch(libctx, "AES-192-CCM", propq)) == NULL)
goto err;
/* Set nonce length if default 96 bits is not appropriate */
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN,
&ccm_nonce_len);
/* Set tag length */
params[1] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
NULL, ccm_tag_len);
/*
* Initialise encrypt operation with the cipher & mode,
* nonce length and tag length parameters.
*/
if (!EVP_EncryptInit_ex2(ctx, cipher, NULL, NULL, params))
goto err;
/* Initialise key and nonce */
if (!EVP_EncryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce))
goto err;
/* Set plaintext length: only needed if AAD is used */
if (!EVP_EncryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_pt)))
goto err;
/* Zero or one call to specify any AAD */
if (!EVP_EncryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata)))
goto err;
/* Encrypt plaintext: can only be called once */
if (!EVP_EncryptUpdate(ctx, outbuf, &outlen, ccm_pt, sizeof(ccm_pt)))
goto err;
/* Output encrypted block */
printf("Ciphertext:\n");
BIO_dump_fp(stdout, outbuf, outlen);
/* Finalise: note get no output for CCM */
if (!EVP_EncryptFinal_ex(ctx, NULL, &tmplen))
goto err;
/* Get tag */
params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
outtag, ccm_tag_len);
params[1] = OSSL_PARAM_construct_end();
if (!EVP_CIPHER_CTX_get_params(ctx, params))
goto err;
/* Output tag */
printf("Tag:\n");
BIO_dump_fp(stdout, outtag, ccm_tag_len);
ret = 1;
err:
if (!ret)
ERR_print_errors_fp(stderr);
EVP_CIPHER_free(cipher);
EVP_CIPHER_CTX_free(ctx);
return ret;
}
int aes_ccm_decrypt(void)
{
int ret = 0;
EVP_CIPHER_CTX *ctx;
EVP_CIPHER *cipher = NULL;
int outlen, rv;
unsigned char outbuf[1024];
size_t ccm_nonce_len = sizeof(ccm_nonce);
OSSL_PARAM params[3] = {
OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
};
printf("AES CCM Decrypt:\n");
printf("Ciphertext:\n");
BIO_dump_fp(stdout, ccm_ct, sizeof(ccm_ct));
if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
goto err;
/* Fetch the cipher implementation */
if ((cipher = EVP_CIPHER_fetch(libctx, "AES-192-CCM", propq)) == NULL)
goto err;
/* Set nonce length if default 96 bits is not appropriate */
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN,
&ccm_nonce_len);
/* Set tag length */
params[1] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
(unsigned char *)ccm_tag,
sizeof(ccm_tag));
/*
* Initialise decrypt operation with the cipher & mode,
* nonce length and expected tag parameters.
*/
if (!EVP_DecryptInit_ex2(ctx, cipher, NULL, NULL, params))
goto err;
/* Specify key and IV */
if (!EVP_DecryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce))
goto err;
/* Set ciphertext length: only needed if we have AAD */
if (!EVP_DecryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_ct)))
goto err;
/* Zero or one call to specify any AAD */
if (!EVP_DecryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata)))
goto err;
/* Decrypt plaintext, verify tag: can only be called once */
rv = EVP_DecryptUpdate(ctx, outbuf, &outlen, ccm_ct, sizeof(ccm_ct));
/* Output decrypted block: if tag verify failed we get nothing */
if (rv > 0) {
printf("Tag verify successful!\nPlaintext:\n");
BIO_dump_fp(stdout, outbuf, outlen);
} else {
printf("Tag verify failed!\nPlaintext not available\n");
goto err;
}
ret = 1;
err:
if (!ret)
ERR_print_errors_fp(stderr);
EVP_CIPHER_free(cipher);
EVP_CIPHER_CTX_free(ctx);
return ret;
}
int main(int argc, char **argv)
{
if (!aes_ccm_encrypt())
return 1;
if (!aes_ccm_decrypt())
return 1;
return 0;
}

228
demos/cipher/aesgcm.c Normal file
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@ -0,0 +1,228 @@
/*
* Copyright 2012-2021 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
*/
/*
* Simple AES GCM authenticated encryption with additional data (AEAD)
* demonstration program.
*/
#include <stdio.h>
#include <openssl/err.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/core_names.h>
/* AES-GCM test data obtained from NIST public test vectors */
/* AES key */
static const unsigned char gcm_key[] = {
0xee, 0xbc, 0x1f, 0x57, 0x48, 0x7f, 0x51, 0x92, 0x1c, 0x04, 0x65, 0x66,
0x5f, 0x8a, 0xe6, 0xd1, 0x65, 0x8b, 0xb2, 0x6d, 0xe6, 0xf8, 0xa0, 0x69,
0xa3, 0x52, 0x02, 0x93, 0xa5, 0x72, 0x07, 0x8f
};
/* Unique initialisation vector */
static const unsigned char gcm_iv[] = {
0x99, 0xaa, 0x3e, 0x68, 0xed, 0x81, 0x73, 0xa0, 0xee, 0xd0, 0x66, 0x84
};
/* Example plaintext to encrypt */
static const unsigned char gcm_pt[] = {
0xf5, 0x6e, 0x87, 0x05, 0x5b, 0xc3, 0x2d, 0x0e, 0xeb, 0x31, 0xb2, 0xea,
0xcc, 0x2b, 0xf2, 0xa5
};
/*
* Example of Additional Authenticated Data (AAD), i.e. unencrypted data
* which can be authenticated using the generated Tag value.
*/
static const unsigned char gcm_aad[] = {
0x4d, 0x23, 0xc3, 0xce, 0xc3, 0x34, 0xb4, 0x9b, 0xdb, 0x37, 0x0c, 0x43,
0x7f, 0xec, 0x78, 0xde
};
/* Expected ciphertext value */
static const unsigned char gcm_ct[] = {
0xf7, 0x26, 0x44, 0x13, 0xa8, 0x4c, 0x0e, 0x7c, 0xd5, 0x36, 0x86, 0x7e,
0xb9, 0xf2, 0x17, 0x36
};
/* Expected AEAD Tag value */
static const unsigned char gcm_tag[] = {
0x67, 0xba, 0x05, 0x10, 0x26, 0x2a, 0xe4, 0x87, 0xd7, 0x37, 0xee, 0x62,
0x98, 0xf7, 0x7e, 0x0c
};
/*
* A library context and property query can be used to select & filter
* algorithm implementations. If they are NULL then the default library
* context and properties are used.
*/
OSSL_LIB_CTX *libctx = NULL;
const char *propq = NULL;
int aes_gcm_encrypt(void)
{
int ret = 0;
EVP_CIPHER_CTX *ctx;
EVP_CIPHER *cipher = NULL;
int outlen, tmplen;
size_t gcm_ivlen = sizeof(gcm_iv);
unsigned char outbuf[1024];
unsigned char outtag[16];
OSSL_PARAM params[2] = {
OSSL_PARAM_END, OSSL_PARAM_END
};
printf("AES GCM Encrypt:\n");
printf("Plaintext:\n");
BIO_dump_fp(stdout, gcm_pt, sizeof(gcm_pt));
/* Create a context for the encrypt operation */
if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
goto err;
/* Fetch the cipher implementation */
if ((cipher = EVP_CIPHER_fetch(libctx, "AES-256-GCM", propq)) == NULL)
goto err;
/* Set IV length if default 96 bits is not appropriate */
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN,
&gcm_ivlen);
/*
* Initialise an encrypt operation with the cipher/mode, key, IV and
* IV length parameter.
* For demonstration purposes the IV is being set here. In a compliant
* application the IV would be generated internally so the iv passed in
* would be NULL.
*/
if (!EVP_EncryptInit_ex2(ctx, cipher, gcm_key, gcm_iv, params))
goto err;
/* Zero or more calls to specify any AAD */
if (!EVP_EncryptUpdate(ctx, NULL, &outlen, gcm_aad, sizeof(gcm_aad)))
goto err;
/* Encrypt plaintext */
if (!EVP_EncryptUpdate(ctx, outbuf, &outlen, gcm_pt, sizeof(gcm_pt)))
goto err;
/* Output encrypted block */
printf("Ciphertext:\n");
BIO_dump_fp(stdout, outbuf, outlen);
/* Finalise: note get no output for GCM */
if (!EVP_EncryptFinal_ex(ctx, outbuf, &tmplen))
goto err;
/* Get tag */
params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
outtag, 16);
if (!EVP_CIPHER_CTX_get_params(ctx, params))
goto err;
/* Output tag */
printf("Tag:\n");
BIO_dump_fp(stdout, outtag, 16);
ret = 1;
err:
if (!ret)
ERR_print_errors_fp(stderr);
EVP_CIPHER_free(cipher);
EVP_CIPHER_CTX_free(ctx);
return ret;
}
int aes_gcm_decrypt(void)
{
int ret = 0;
EVP_CIPHER_CTX *ctx;
EVP_CIPHER *cipher = NULL;
int outlen, rv;
size_t gcm_ivlen = sizeof(gcm_iv);
unsigned char outbuf[1024];
OSSL_PARAM params[2] = {
OSSL_PARAM_END, OSSL_PARAM_END
};
printf("AES GCM Decrypt:\n");
printf("Ciphertext:\n");
BIO_dump_fp(stdout, gcm_ct, sizeof(gcm_ct));
if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
goto err;
/* Fetch the cipher implementation */
if ((cipher = EVP_CIPHER_fetch(libctx, "AES-256-GCM", propq)) == NULL)
goto err;
/* Set IV length if default 96 bits is not appropriate */
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN,
&gcm_ivlen);
/*
* Initialise an encrypt operation with the cipher/mode, key, IV and
* IV length parameter.
*/
if (!EVP_DecryptInit_ex2(ctx, cipher, gcm_key, gcm_iv, params))
goto err;
/* Zero or more calls to specify any AAD */
if (!EVP_DecryptUpdate(ctx, NULL, &outlen, gcm_aad, sizeof(gcm_aad)))
goto err;
/* Decrypt plaintext */
if (!EVP_DecryptUpdate(ctx, outbuf, &outlen, gcm_ct, sizeof(gcm_ct)))
goto err;
/* Output decrypted block */
printf("Plaintext:\n");
BIO_dump_fp(stdout, outbuf, outlen);
/* Set expected tag value. */
params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
(void*)gcm_tag, sizeof(gcm_tag));
if (!EVP_CIPHER_CTX_set_params(ctx, params))
goto err;
/* Finalise: note get no output for GCM */
rv = EVP_DecryptFinal_ex(ctx, outbuf, &outlen);
/*
* Print out return value. If this is not successful authentication
* failed and plaintext is not trustworthy.
*/
printf("Tag Verify %s\n", rv > 0 ? "Successful!" : "Failed!");
ret = 1;
err:
if (!ret)
ERR_print_errors_fp(stderr);
EVP_CIPHER_free(cipher);
EVP_CIPHER_CTX_free(ctx);
return ret;
}
int main(int argc, char **argv)
{
if (!aes_gcm_encrypt())
return 1;
if (!aes_gcm_decrypt())
return 1;
return 0;
}

125
demos/evp/aesccm.c
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@ -1,125 +0,0 @@
/*
* Copyright 2013-2021 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
*/
/*
* Simple AES CCM test program, uses the same NIST data used for the FIPS
* self test but uses the application level EVP APIs.
*/
#include <stdio.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
/* AES-CCM test data from NIST public test vectors */
static const unsigned char ccm_key[] = {
0xce, 0xb0, 0x09, 0xae, 0xa4, 0x45, 0x44, 0x51, 0xfe, 0xad, 0xf0, 0xe6,
0xb3, 0x6f, 0x45, 0x55, 0x5d, 0xd0, 0x47, 0x23, 0xba, 0xa4, 0x48, 0xe8
};
static const unsigned char ccm_nonce[] = {
0x76, 0x40, 0x43, 0xc4, 0x94, 0x60, 0xb7
};
static const unsigned char ccm_adata[] = {
0x6e, 0x80, 0xdd, 0x7f, 0x1b, 0xad, 0xf3, 0xa1, 0xc9, 0xab, 0x25, 0xc7,
0x5f, 0x10, 0xbd, 0xe7, 0x8c, 0x23, 0xfa, 0x0e, 0xb8, 0xf9, 0xaa, 0xa5,
0x3a, 0xde, 0xfb, 0xf4, 0xcb, 0xf7, 0x8f, 0xe4
};
static const unsigned char ccm_pt[] = {
0xc8, 0xd2, 0x75, 0xf9, 0x19, 0xe1, 0x7d, 0x7f, 0xe6, 0x9c, 0x2a, 0x1f,
0x58, 0x93, 0x9d, 0xfe, 0x4d, 0x40, 0x37, 0x91, 0xb5, 0xdf, 0x13, 0x10
};
static const unsigned char ccm_ct[] = {
0x8a, 0x0f, 0x3d, 0x82, 0x29, 0xe4, 0x8e, 0x74, 0x87, 0xfd, 0x95, 0xa2,
0x8a, 0xd3, 0x92, 0xc8, 0x0b, 0x36, 0x81, 0xd4, 0xfb, 0xc7, 0xbb, 0xfd
};
static const unsigned char ccm_tag[] = {
0x2d, 0xd6, 0xef, 0x1c, 0x45, 0xd4, 0xcc, 0xb7, 0x23, 0xdc, 0x07, 0x44,
0x14, 0xdb, 0x50, 0x6d
};
void aes_ccm_encrypt(void)
{
EVP_CIPHER_CTX *ctx;
int outlen, tmplen;
unsigned char outbuf[1024];
printf("AES CCM Encrypt:\n");
printf("Plaintext:\n");
BIO_dump_fp(stdout, ccm_pt, sizeof(ccm_pt));
ctx = EVP_CIPHER_CTX_new();
/* Set cipher type and mode */
EVP_EncryptInit_ex(ctx, EVP_aes_192_ccm(), NULL, NULL, NULL);
/* Set nonce length if default 96 bits is not appropriate */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(ccm_nonce),
NULL);
/* Set tag length */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, sizeof(ccm_tag), NULL);
/* Initialise key and IV */
EVP_EncryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce);
/* Set plaintext length: only needed if AAD is used */
EVP_EncryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_pt));
/* Zero or one call to specify any AAD */
EVP_EncryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata));
/* Encrypt plaintext: can only be called once */
EVP_EncryptUpdate(ctx, outbuf, &outlen, ccm_pt, sizeof(ccm_pt));
/* Output encrypted block */
printf("Ciphertext:\n");
BIO_dump_fp(stdout, outbuf, outlen);
/* Finalise: note get no output for CCM */
EVP_EncryptFinal_ex(ctx, outbuf, &outlen);
/* Get tag */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, 16, outbuf);
/* Output tag */
printf("Tag:\n");
BIO_dump_fp(stdout, outbuf, 16);
EVP_CIPHER_CTX_free(ctx);
}
void aes_ccm_decrypt(void)
{
EVP_CIPHER_CTX *ctx;
int outlen, tmplen, rv;
unsigned char outbuf[1024];
printf("AES CCM Decrypt:\n");
printf("Ciphertext:\n");
BIO_dump_fp(stdout, ccm_ct, sizeof(ccm_ct));
ctx = EVP_CIPHER_CTX_new();
/* Select cipher */
EVP_DecryptInit_ex(ctx, EVP_aes_192_ccm(), NULL, NULL, NULL);
/* Set nonce length, omit for 96 bits */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(ccm_nonce),
NULL);
/* Set expected tag value */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG,
sizeof(ccm_tag), (void *)ccm_tag);
/* Specify key and IV */
EVP_DecryptInit_ex(ctx, NULL, NULL, ccm_key, ccm_nonce);
/* Set ciphertext length: only needed if we have AAD */
EVP_DecryptUpdate(ctx, NULL, &outlen, NULL, sizeof(ccm_ct));
/* Zero or one call to specify any AAD */
EVP_DecryptUpdate(ctx, NULL, &outlen, ccm_adata, sizeof(ccm_adata));
/* Decrypt plaintext, verify tag: can only be called once */
rv = EVP_DecryptUpdate(ctx, outbuf, &outlen, ccm_ct, sizeof(ccm_ct));
/* Output decrypted block: if tag verify failed we get nothing */
if (rv > 0) {
printf("Plaintext:\n");
BIO_dump_fp(stdout, outbuf, outlen);
} else
printf("Plaintext not available: tag verify failed.\n");
EVP_CIPHER_CTX_free(ctx);
}
int main(int argc, char **argv)
{
aes_ccm_encrypt();
aes_ccm_decrypt();
}

121
demos/evp/aesgcm.c
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@ -1,121 +0,0 @@
/*
* Copyright 2012-2016 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
*/
/*
* Simple AES GCM test program, uses the same NIST data used for the FIPS
* self test but uses the application level EVP APIs.
*/
#include <stdio.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
/* AES-GCM test data from NIST public test vectors */
static const unsigned char gcm_key[] = {
0xee, 0xbc, 0x1f, 0x57, 0x48, 0x7f, 0x51, 0x92, 0x1c, 0x04, 0x65, 0x66,
0x5f, 0x8a, 0xe6, 0xd1, 0x65, 0x8b, 0xb2, 0x6d, 0xe6, 0xf8, 0xa0, 0x69,
0xa3, 0x52, 0x02, 0x93, 0xa5, 0x72, 0x07, 0x8f
};
static const unsigned char gcm_iv[] = {
0x99, 0xaa, 0x3e, 0x68, 0xed, 0x81, 0x73, 0xa0, 0xee, 0xd0, 0x66, 0x84
};
static const unsigned char gcm_pt[] = {
0xf5, 0x6e, 0x87, 0x05, 0x5b, 0xc3, 0x2d, 0x0e, 0xeb, 0x31, 0xb2, 0xea,
0xcc, 0x2b, 0xf2, 0xa5
};
static const unsigned char gcm_aad[] = {
0x4d, 0x23, 0xc3, 0xce, 0xc3, 0x34, 0xb4, 0x9b, 0xdb, 0x37, 0x0c, 0x43,
0x7f, 0xec, 0x78, 0xde
};
static const unsigned char gcm_ct[] = {
0xf7, 0x26, 0x44, 0x13, 0xa8, 0x4c, 0x0e, 0x7c, 0xd5, 0x36, 0x86, 0x7e,
0xb9, 0xf2, 0x17, 0x36
};
static const unsigned char gcm_tag[] = {
0x67, 0xba, 0x05, 0x10, 0x26, 0x2a, 0xe4, 0x87, 0xd7, 0x37, 0xee, 0x62,
0x98, 0xf7, 0x7e, 0x0c
};
void aes_gcm_encrypt(void)
{
EVP_CIPHER_CTX *ctx;
int outlen, tmplen;
unsigned char outbuf[1024];
printf("AES GCM Encrypt:\n");
printf("Plaintext:\n");
BIO_dump_fp(stdout, gcm_pt, sizeof(gcm_pt));
ctx = EVP_CIPHER_CTX_new();
/* Set cipher type and mode */
EVP_EncryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
/* Set IV length if default 96 bits is not appropriate */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(gcm_iv), NULL);
/* Initialise key and IV */
EVP_EncryptInit_ex(ctx, NULL, NULL, gcm_key, gcm_iv);
/* Zero or more calls to specify any AAD */
EVP_EncryptUpdate(ctx, NULL, &outlen, gcm_aad, sizeof(gcm_aad));
/* Encrypt plaintext */
EVP_EncryptUpdate(ctx, outbuf, &outlen, gcm_pt, sizeof(gcm_pt));
/* Output encrypted block */
printf("Ciphertext:\n");
BIO_dump_fp(stdout, outbuf, outlen);
/* Finalise: note get no output for GCM */
EVP_EncryptFinal_ex(ctx, outbuf, &outlen);
/* Get tag */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, 16, outbuf);
/* Output tag */
printf("Tag:\n");
BIO_dump_fp(stdout, outbuf, 16);
EVP_CIPHER_CTX_free(ctx);
}
void aes_gcm_decrypt(void)
{
EVP_CIPHER_CTX *ctx;
int outlen, tmplen, rv;
unsigned char outbuf[1024];
printf("AES GCM Decrypt:\n");
printf("Ciphertext:\n");
BIO_dump_fp(stdout, gcm_ct, sizeof(gcm_ct));
ctx = EVP_CIPHER_CTX_new();
/* Select cipher */
EVP_DecryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
/* Set IV length, omit for 96 bits */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(gcm_iv), NULL);
/* Specify key and IV */
EVP_DecryptInit_ex(ctx, NULL, NULL, gcm_key, gcm_iv);
/* Zero or more calls to specify any AAD */
EVP_DecryptUpdate(ctx, NULL, &outlen, gcm_aad, sizeof(gcm_aad));
/* Decrypt plaintext */
EVP_DecryptUpdate(ctx, outbuf, &outlen, gcm_ct, sizeof(gcm_ct));
/* Output decrypted block */
printf("Plaintext:\n");
BIO_dump_fp(stdout, outbuf, outlen);
/* Set expected tag value. */
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, sizeof(gcm_tag),
(void *)gcm_tag);
/* Finalise: note get no output for GCM */
rv = EVP_DecryptFinal_ex(ctx, outbuf, &outlen);
/*
* Print out return value. If this is not successful authentication
* failed and plaintext is not trustworthy.
*/
printf("Tag Verify %s\n", rv > 0 ? "Successful!" : "Failed!");
EVP_CIPHER_CTX_free(ctx);
}
int main(int argc, char **argv)
{
aes_gcm_encrypt();
aes_gcm_decrypt();
}