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Add an EVP demo for AES key wrap
Fixes openssl#14119 Reviewed-by: Shane Lontis <shane.lontis@oracle.com> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19141)
This commit is contained in:
Daniel Fiala
Pauli
parent
8b3ccf1cd5
commit
bebc6c8999
@ -7,18 +7,21 @@
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#
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# LD_LIBRARY_PATH=../.. ./aesccm
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# LD_LIBRARY_PATH=../.. ./aesgcm
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# LD_LIBRARY_PATH=../.. ./aeskeywrap
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# LD_LIBRARY_PATH=../.. ./ariacbc
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CFLAGS = $(OPENSSL_INCS_LOCATION)
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LDFLAGS = $(OPENSSL_LIBS_LOCATION) -lssl -lcrypto
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all: aesccm aesgcm ariacbc
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all: aesccm aesgcm aeskeywrap ariacbc
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aesccm: aesccm.o
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aesgcm: aesgcm.o
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aeskeywrap: aeskeywrap.o
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ariacbc: ariacbc.o
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aesccm aesgcm ariacbc:
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aesccm aesgcm aeskeywrap ariacbc:
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$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
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clean:
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$(RM) aesccm aesgcm ariacbc *.o
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$(RM) aesccm aesgcm aeskeywrap ariacbc *.o
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181
demos/cipher/aeskeywrap.c
Normal file
181
demos/cipher/aeskeywrap.c
Normal file
@ -0,0 +1,181 @@
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/*
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* Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* Simple aes wrap encryption demonstration program.
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*/
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#include <stdio.h>
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#include <openssl/err.h>
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#include <openssl/bio.h>
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#include <openssl/evp.h>
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#include <openssl/crypto.h>
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#include <openssl/core_names.h>
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/* aes key */
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static const unsigned char wrap_key[] = {
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0xee, 0xbc, 0x1f, 0x57, 0x48, 0x7f, 0x51, 0x92, 0x1c, 0x04, 0x65, 0x66,
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0x5f, 0x8a, 0xe6, 0xd1, 0x65, 0x8b, 0xb2, 0x6d, 0xe6, 0xf8, 0xa0, 0x69,
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0xa3, 0x52, 0x02, 0x93, 0xa5, 0x72, 0x07, 0x8f
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};
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/* Unique initialisation vector */
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static const unsigned char wrap_iv[] = {
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0x99, 0xaa, 0x3e, 0x68, 0xed, 0x81, 0x73, 0xa0, 0xee, 0xd0, 0x66, 0x84,
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0x99, 0xaa, 0x3e, 0x68,
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};
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/* Example plaintext to encrypt */
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static const unsigned char wrap_pt[] = {
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0xad, 0x4f, 0xc9, 0xfc, 0x77, 0x69, 0xc9, 0xea, 0xfc, 0xdf, 0x00, 0xac,
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0x34, 0xec, 0x40, 0xbc, 0x28, 0x3f, 0xa4, 0x5e, 0xd8, 0x99, 0xe4, 0x5d,
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0x5e, 0x7a, 0xc4, 0xe6, 0xca, 0x7b, 0xa5, 0xb7,
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};
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/* Expected ciphertext value */
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static const unsigned char wrap_ct[] = {
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0x97, 0x99, 0x55, 0xca, 0xf6, 0x3e, 0x95, 0x54, 0x39, 0xd6, 0xaf, 0x63, 0xff, 0x2c, 0xe3, 0x96,
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0xf7, 0x0d, 0x2c, 0x9c, 0xc7, 0x43, 0xc0, 0xb6, 0x31, 0x43, 0xb9, 0x20, 0xac, 0x6b, 0xd3, 0x67,
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0xad, 0x01, 0xaf, 0xa7, 0x32, 0x74, 0x26, 0x92,
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};
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/*
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* A library context and property query can be used to select & filter
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* algorithm implementations. If they are NULL then the default library
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* context and properties are used.
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*/
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OSSL_LIB_CTX *libctx = NULL;
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const char *propq = NULL;
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int aes_wrap_encrypt(void)
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{
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int ret = 0;
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EVP_CIPHER_CTX *ctx;
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EVP_CIPHER *cipher = NULL;
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int outlen, tmplen;
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unsigned char outbuf[1024];
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printf("aes wrap Encrypt:\n");
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printf("Plaintext:\n");
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BIO_dump_fp(stdout, wrap_pt, sizeof(wrap_pt));
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/* Create a context for the encrypt operation */
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if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
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goto err;
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EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
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/* Fetch the cipher implementation */
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if ((cipher = EVP_CIPHER_fetch(libctx, "AES-256-WRAP", propq)) == NULL)
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goto err;
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/*
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* Initialise an encrypt operation with the cipher/mode, key and IV.
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* We are not setting any custom params so let params be just NULL.
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*/
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if (!EVP_EncryptInit_ex2(ctx, cipher, wrap_key, wrap_iv, /* params */ NULL))
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goto err;
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/* Encrypt plaintext */
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if (!EVP_EncryptUpdate(ctx, outbuf, &outlen, wrap_pt, sizeof(wrap_pt)))
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goto err;
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/* Finalise: there can be some additional output from padding */
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if (!EVP_EncryptFinal_ex(ctx, outbuf + outlen, &tmplen))
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goto err;
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outlen += tmplen;
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/* Output encrypted block */
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printf("Ciphertext (outlen:%d):\n", outlen);
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BIO_dump_fp(stdout, outbuf, outlen);
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if (sizeof(wrap_ct) == outlen && !CRYPTO_memcmp(outbuf, wrap_ct, outlen))
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printf("Final ciphertext matches expected ciphertext\n");
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else
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printf("Final ciphertext differs from expected ciphertext\n");
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ret = 1;
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err:
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if (!ret)
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ERR_print_errors_fp(stderr);
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EVP_CIPHER_free(cipher);
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EVP_CIPHER_CTX_free(ctx);
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return ret;
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}
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int aes_wrap_decrypt(void)
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{
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int ret = 0;
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EVP_CIPHER_CTX *ctx;
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EVP_CIPHER *cipher = NULL;
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int outlen, tmplen;
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unsigned char outbuf[1024];
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printf("aes wrap Decrypt:\n");
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printf("Ciphertext:\n");
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BIO_dump_fp(stdout, wrap_ct, sizeof(wrap_ct));
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if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
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goto err;
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EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
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/* Fetch the cipher implementation */
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if ((cipher = EVP_CIPHER_fetch(libctx, "aes-256-wrap", propq)) == NULL)
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goto err;
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/*
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* Initialise an encrypt operation with the cipher/mode, key and IV.
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* We are not setting any custom params so let params be just NULL.
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*/
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if (!EVP_DecryptInit_ex2(ctx, cipher, wrap_key, wrap_iv, /* params */ NULL))
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goto err;
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/* Decrypt plaintext */
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if (!EVP_DecryptUpdate(ctx, outbuf, &outlen, wrap_ct, sizeof(wrap_ct)))
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goto err;
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/* Finalise: there can be some additional output from padding */
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if (!EVP_DecryptFinal_ex(ctx, outbuf + outlen, &tmplen))
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goto err;
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outlen += tmplen;
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/* Output decrypted block */
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printf("Plaintext (outlen:%d):\n", outlen);
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BIO_dump_fp(stdout, outbuf, outlen);
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if (sizeof(wrap_pt) == outlen && !CRYPTO_memcmp(outbuf, wrap_pt, outlen))
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printf("Final plaintext matches original plaintext\n");
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else
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printf("Final plaintext differs from original plaintext\n");
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ret = 1;
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err:
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if (!ret)
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ERR_print_errors_fp(stderr);
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EVP_CIPHER_free(cipher);
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EVP_CIPHER_CTX_free(ctx);
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return ret;
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}
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int main(int argc, char **argv)
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{
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if (!aes_wrap_encrypt())
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return 1;
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if (!aes_wrap_decrypt())
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return 1;
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return 0;
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}
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