1 files changed, 121 insertions, 0 deletions
diff --git a/openssl-1.1.0h/demos/evp/aesgcm.c b/openssl-1.1.0h/demos/evp/aesgcm.c
new file mode 100644
index 0000000..df59f46
--- /dev/null
+++ b/openssl-1.1.0h/demos/evp/aesgcm.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2012-2016 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 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 Derypt:\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();
+}