diff options
author | Pauli <paul.dale@oracle.com> | 2018-09-18 11:44:43 +1000 |
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committer | Pauli <paul.dale@oracle.com> | 2018-09-19 11:38:43 +1000 |
commit | 0db957dbbcf6a432086ab913378c23636d8c374c (patch) | |
tree | 5cb73b1ef660fb25979e78f09969c70bc2368221 | |
parent | f9a22815f386dbe7a13822f0ac3629ae8521cd76 (diff) | |
download | openssl-0db957dbbcf6a432086ab913378c23636d8c374c.tar.gz |
Add a GMAC demonstration program.
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/7249)
-rw-r--r-- | demos/evp/Makefile | 8 | ||||
-rw-r--r-- | demos/evp/gmac.c | 103 |
2 files changed, 108 insertions, 3 deletions
diff --git a/demos/evp/Makefile b/demos/evp/Makefile index c2e10a1ded..1fb0f39c77 100644 --- a/demos/evp/Makefile +++ b/demos/evp/Makefile @@ -7,17 +7,19 @@ # # LD_LIBRARY_PATH=../.. ./aesccm # LD_LIBRARY_PATH=../.. ./aesgcm +# LD_LIBRARY_PATH=../.. ./gmac CFLAGS = $(OPENSSL_INCS_LOCATION) LDFLAGS = $(OPENSSL_LIBS_LOCATION) -lssl -lcrypto -all: aesccm aesgcm +all: aesccm aesgcm gmac aesccm: aesccm.o aesgcm: aesgcm.o +gmac: gmac.o -aesccm aesgcm: +aesccm aesgcm gmac: $(CC) $(CFLAGS) -o $@ $< $(LDFLAGS) clean: - $(RM) aesccm aesgcm *.o + $(RM) aesccm aesgcm gmac *.o diff --git a/demos/evp/gmac.c b/demos/evp/gmac.c new file mode 100644 index 0000000000..0b2231b368 --- /dev/null +++ b/demos/evp/gmac.c @@ -0,0 +1,103 @@ +/* + * Copyright 2018 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (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 GMAC test program, uses the same NIST data used for the FIPS + * self test but uses the application level EVP APIs. + */ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <openssl/bio.h> +#include <openssl/evp.h> + +/* AES-GMAC test data from NIST public test vectors */ + +static const unsigned char gmac_key[] = { 0x77, 0xbe, 0x63, 0x70, 0x89, 0x71, 0xc4, 0xe2, + 0x40, 0xd1, 0xcb, 0x79, 0xe8, 0xd7, 0x7f, 0xeb }; +static const unsigned char gmac_iv[] = { 0xe0, 0xe0, 0x0f, 0x19, 0xfe, 0xd7, 0xba, 0x01, + 0x36, 0xa7, 0x97, 0xf3 }; +static const unsigned char gmac_aad[] = { 0x7a, 0x43, 0xec, 0x1d, 0x9c, 0x0a, 0x5a, 0x78, + 0xa0, 0xb1, 0x65, 0x33, 0xa6, 0x21, 0x3c, 0xab }; + +static const unsigned char gmac_tag[] = { 0x20, 0x9f, 0xcc, 0x8d, 0x36, 0x75, 0xed, 0x93, + 0x8e, 0x9c, 0x71, 0x66, 0x70, 0x9d, 0xd9, 0x46 }; + +static int aes_gmac(void) +{ + EVP_CIPHER_CTX *ctx; + int outlen, tmplen; + unsigned char outbuf[1024]; + int ret = 0; + + printf("AES GMAC:\n"); + printf("Authenticated Data:\n"); + BIO_dump_fp(stdout, gmac_aad, sizeof(gmac_aad)); + + if ((ctx = EVP_CIPHER_CTX_new()) == NULL) { + printf("EVP_CIPHER_CTX_new: failed\n"); + goto err; + } + + /* Set cipher type and mode */ + if (!EVP_EncryptInit_ex(ctx, EVP_aes_128_gcm(), NULL, NULL, NULL)) { + printf("EVP_EncryptInit_ex: failed\n"); + goto err; + } + + /* Set IV length if default 96 bits is not appropriate */ + if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, sizeof(gmac_iv), + NULL)) { + printf("EVP_CIPHER_CTX_ctrl: set IV length failed\n"); + goto err; + } + + /* Initialise key and IV */ + if (!EVP_EncryptInit_ex(ctx, NULL, NULL, gmac_key, gmac_iv)) { + printf("EVP_EncryptInit_ex: set key and IV failed\n"); + goto err; + } + + /* Zero or more calls to specify any AAD */ + if (!EVP_EncryptUpdate(ctx, NULL, &outlen, gmac_aad, sizeof(gmac_aad))) { + printf("EVP_EncryptUpdate: setting AAD failed\n"); + goto err; + } + + /* Finalise: note get no output for GMAC */ + if (!EVP_EncryptFinal_ex(ctx, outbuf, &outlen)) { + printf("EVP_EncryptFinal_ex: failed\n"); + goto err; + } + + /* Get tag */ + if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, 16, outbuf)) { + printf("EVP_CIPHER_CTX_ctrl: failed\n"); + goto err; + } + + /* Output tag */ + printf("Tag:\n"); + BIO_dump_fp(stdout, outbuf, 16); + + /* Is the tag correct? */ + if (memcmp(outbuf, gmac_tag, sizeof(gmac_tag)) != 0) { + printf("Expected:\n"); + BIO_dump_fp(stdout, gmac_tag, sizeof(gmac_tag)); + } else + ret = 1; +err: + EVP_CIPHER_CTX_free(ctx); + return ret; +} + +int main(int argc, char **argv) +{ + return aes_gmac() ? EXIT_SUCCESS : EXIT_FAILURE; +} |