From bebc6c899943cc3f519501aee221c9d0eb10fcfd Mon Sep 17 00:00:00 2001 From: Daniel Fiala Date: Tue, 6 Sep 2022 07:51:59 +0200 Subject: Add an EVP demo for AES key wrap Fixes openssl#14119 Reviewed-by: Shane Lontis Reviewed-by: Tomas Mraz Reviewed-by: Hugo Landau Reviewed-by: Paul Dale (Merged from https://github.com/openssl/openssl/pull/19141) --- demos/cipher/Makefile | 9 ++- demos/cipher/aeskeywrap.c | 181 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 187 insertions(+), 3 deletions(-) create mode 100644 demos/cipher/aeskeywrap.c diff --git a/demos/cipher/Makefile b/demos/cipher/Makefile index b4f08a3746..81f526535e 100644 --- a/demos/cipher/Makefile +++ b/demos/cipher/Makefile @@ -7,18 +7,21 @@ # # LD_LIBRARY_PATH=../.. ./aesccm # LD_LIBRARY_PATH=../.. ./aesgcm +# LD_LIBRARY_PATH=../.. ./aeskeywrap +# LD_LIBRARY_PATH=../.. ./ariacbc CFLAGS = $(OPENSSL_INCS_LOCATION) LDFLAGS = $(OPENSSL_LIBS_LOCATION) -lssl -lcrypto -all: aesccm aesgcm ariacbc +all: aesccm aesgcm aeskeywrap ariacbc aesccm: aesccm.o aesgcm: aesgcm.o +aeskeywrap: aeskeywrap.o ariacbc: ariacbc.o -aesccm aesgcm ariacbc: +aesccm aesgcm aeskeywrap ariacbc: $(CC) $(CFLAGS) -o $@ $< $(LDFLAGS) clean: - $(RM) aesccm aesgcm ariacbc *.o + $(RM) aesccm aesgcm aeskeywrap ariacbc *.o diff --git a/demos/cipher/aeskeywrap.c b/demos/cipher/aeskeywrap.c new file mode 100644 index 0000000000..f987772e4f --- /dev/null +++ b/demos/cipher/aeskeywrap.c @@ -0,0 +1,181 @@ +/* + * Copyright 2022 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 wrap encryption demonstration program. + */ + +#include +#include +#include +#include +#include +#include + +/* aes key */ +static const unsigned char wrap_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 wrap_iv[] = { + 0x99, 0xaa, 0x3e, 0x68, 0xed, 0x81, 0x73, 0xa0, 0xee, 0xd0, 0x66, 0x84, + 0x99, 0xaa, 0x3e, 0x68, +}; + +/* Example plaintext to encrypt */ +static const unsigned char wrap_pt[] = { + 0xad, 0x4f, 0xc9, 0xfc, 0x77, 0x69, 0xc9, 0xea, 0xfc, 0xdf, 0x00, 0xac, + 0x34, 0xec, 0x40, 0xbc, 0x28, 0x3f, 0xa4, 0x5e, 0xd8, 0x99, 0xe4, 0x5d, + 0x5e, 0x7a, 0xc4, 0xe6, 0xca, 0x7b, 0xa5, 0xb7, +}; + +/* Expected ciphertext value */ +static const unsigned char wrap_ct[] = { + 0x97, 0x99, 0x55, 0xca, 0xf6, 0x3e, 0x95, 0x54, 0x39, 0xd6, 0xaf, 0x63, 0xff, 0x2c, 0xe3, 0x96, + 0xf7, 0x0d, 0x2c, 0x9c, 0xc7, 0x43, 0xc0, 0xb6, 0x31, 0x43, 0xb9, 0x20, 0xac, 0x6b, 0xd3, 0x67, + 0xad, 0x01, 0xaf, 0xa7, 0x32, 0x74, 0x26, 0x92, +}; + +/* + * 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_wrap_encrypt(void) +{ + int ret = 0; + EVP_CIPHER_CTX *ctx; + EVP_CIPHER *cipher = NULL; + int outlen, tmplen; + unsigned char outbuf[1024]; + + printf("aes wrap Encrypt:\n"); + printf("Plaintext:\n"); + BIO_dump_fp(stdout, wrap_pt, sizeof(wrap_pt)); + + /* Create a context for the encrypt operation */ + if ((ctx = EVP_CIPHER_CTX_new()) == NULL) + goto err; + + EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW); + + /* Fetch the cipher implementation */ + if ((cipher = EVP_CIPHER_fetch(libctx, "AES-256-WRAP", propq)) == NULL) + goto err; + + /* + * Initialise an encrypt operation with the cipher/mode, key and IV. + * We are not setting any custom params so let params be just NULL. + */ + if (!EVP_EncryptInit_ex2(ctx, cipher, wrap_key, wrap_iv, /* params */ NULL)) + goto err; + + /* Encrypt plaintext */ + if (!EVP_EncryptUpdate(ctx, outbuf, &outlen, wrap_pt, sizeof(wrap_pt))) + goto err; + + /* Finalise: there can be some additional output from padding */ + if (!EVP_EncryptFinal_ex(ctx, outbuf + outlen, &tmplen)) + goto err; + outlen += tmplen; + + /* Output encrypted block */ + printf("Ciphertext (outlen:%d):\n", outlen); + BIO_dump_fp(stdout, outbuf, outlen); + + if (sizeof(wrap_ct) == outlen && !CRYPTO_memcmp(outbuf, wrap_ct, outlen)) + printf("Final ciphertext matches expected ciphertext\n"); + else + printf("Final ciphertext differs from expected ciphertext\n"); + + ret = 1; +err: + if (!ret) + ERR_print_errors_fp(stderr); + + EVP_CIPHER_free(cipher); + EVP_CIPHER_CTX_free(ctx); + + return ret; +} + +int aes_wrap_decrypt(void) +{ + int ret = 0; + EVP_CIPHER_CTX *ctx; + EVP_CIPHER *cipher = NULL; + int outlen, tmplen; + unsigned char outbuf[1024]; + + printf("aes wrap Decrypt:\n"); + printf("Ciphertext:\n"); + BIO_dump_fp(stdout, wrap_ct, sizeof(wrap_ct)); + + if ((ctx = EVP_CIPHER_CTX_new()) == NULL) + goto err; + + EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW); + + /* Fetch the cipher implementation */ + if ((cipher = EVP_CIPHER_fetch(libctx, "aes-256-wrap", propq)) == NULL) + goto err; + + /* + * Initialise an encrypt operation with the cipher/mode, key and IV. + * We are not setting any custom params so let params be just NULL. + */ + if (!EVP_DecryptInit_ex2(ctx, cipher, wrap_key, wrap_iv, /* params */ NULL)) + goto err; + + /* Decrypt plaintext */ + if (!EVP_DecryptUpdate(ctx, outbuf, &outlen, wrap_ct, sizeof(wrap_ct))) + goto err; + + /* Finalise: there can be some additional output from padding */ + if (!EVP_DecryptFinal_ex(ctx, outbuf + outlen, &tmplen)) + goto err; + outlen += tmplen; + + /* Output decrypted block */ + printf("Plaintext (outlen:%d):\n", outlen); + BIO_dump_fp(stdout, outbuf, outlen); + + if (sizeof(wrap_pt) == outlen && !CRYPTO_memcmp(outbuf, wrap_pt, outlen)) + printf("Final plaintext matches original plaintext\n"); + else + printf("Final plaintext differs from original plaintext\n"); + + 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_wrap_encrypt()) + return 1; + + if (!aes_wrap_decrypt()) + return 1; + + return 0; +} + -- cgit v1.2.3