1 files changed, 252 insertions, 0 deletions
diff --git a/lib/mbedtls-2.27.0/programs/pkey/ecdsa.c b/lib/mbedtls-2.27.0/programs/pkey/ecdsa.c
new file mode 100644
index 0000000..1bbf826
--- /dev/null
+++ b/lib/mbedtls-2.27.0/programs/pkey/ecdsa.c
@@ -0,0 +1,252 @@
+/*
+ *  Example ECDSA program
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#include <stdio.h>
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define mbedtls_exit            exit
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
+
+#if defined(MBEDTLS_ECDSA_C) && \
+    defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_CTR_DRBG_C)
+#include "mbedtls/entropy.h"
+#include "mbedtls/ctr_drbg.h"
+#include "mbedtls/ecdsa.h"
+#include "mbedtls/sha256.h"
+
+#include <string.h>
+#endif
+
+/*
+ * Uncomment to show key and signature details
+ */
+#define VERBOSE
+
+/*
+ * Uncomment to force use of a specific curve
+ */
+#define ECPARAMS    MBEDTLS_ECP_DP_SECP192R1
+
+#if !defined(ECPARAMS)
+#define ECPARAMS    mbedtls_ecp_curve_list()->grp_id
+#endif
+
+#if !defined(MBEDTLS_ECDSA_C) || !defined(MBEDTLS_SHA256_C) || \
+    !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C)
+int main( void )
+{
+    mbedtls_printf("MBEDTLS_ECDSA_C and/or MBEDTLS_SHA256_C and/or "
+           "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C not defined\n");
+    mbedtls_exit( 0 );
+}
+#else
+#if defined(VERBOSE)
+static void dump_buf( const char *title, unsigned char *buf, size_t len )
+{
+    size_t i;
+
+    mbedtls_printf( "%s", title );
+    for( i = 0; i < len; i++ )
+        mbedtls_printf("%c%c", "0123456789ABCDEF" [buf[i] / 16],
+                       "0123456789ABCDEF" [buf[i] % 16] );
+    mbedtls_printf( "\n" );
+}
+
+static void dump_pubkey( const char *title, mbedtls_ecdsa_context *key )
+{
+    unsigned char buf[300];
+    size_t len;
+
+    if( mbedtls_ecp_point_write_binary( &key->grp, &key->Q,
+                MBEDTLS_ECP_PF_UNCOMPRESSED, &len, buf, sizeof buf ) != 0 )
+    {
+        mbedtls_printf("internal error\n");
+        return;
+    }
+
+    dump_buf( title, buf, len );
+}
+#else
+#define dump_buf( a, b, c )
+#define dump_pubkey( a, b )
+#endif
+
+
+int main( int argc, char *argv[] )
+{
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
+    mbedtls_ecdsa_context ctx_sign, ctx_verify;
+    mbedtls_entropy_context entropy;
+    mbedtls_ctr_drbg_context ctr_drbg;
+    unsigned char message[100];
+    unsigned char hash[32];
+    unsigned char sig[MBEDTLS_ECDSA_MAX_LEN];
+    size_t sig_len;
+    const char *pers = "ecdsa";
+    ((void) argv);
+
+    mbedtls_ecdsa_init( &ctx_sign );
+    mbedtls_ecdsa_init( &ctx_verify );
+    mbedtls_ctr_drbg_init( &ctr_drbg );
+
+    memset( sig, 0, sizeof( sig ) );
+    memset( message, 0x25, sizeof( message ) );
+
+    if( argc != 1 )
+    {
+        mbedtls_printf( "usage: ecdsa\n" );
+
+#if defined(_WIN32)
+        mbedtls_printf( "\n" );
+#endif
+
+        goto exit;
+    }
+
+    /*
+     * Generate a key pair for signing
+     */
+    mbedtls_printf( "\n  . Seeding the random number generator..." );
+    fflush( stdout );
+
+    mbedtls_entropy_init( &entropy );
+    if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
+                               (const unsigned char *) pers,
+                               strlen( pers ) ) ) != 0 )
+    {
+        mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret );
+        goto exit;
+    }
+
+    mbedtls_printf( " ok\n  . Generating key pair..." );
+    fflush( stdout );
+
+    if( ( ret = mbedtls_ecdsa_genkey( &ctx_sign, ECPARAMS,
+                              mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
+    {
+        mbedtls_printf( " failed\n  ! mbedtls_ecdsa_genkey returned %d\n", ret );
+        goto exit;
+    }
+
+    mbedtls_printf( " ok (key size: %d bits)\n", (int) ctx_sign.grp.pbits );
+
+    dump_pubkey( "  + Public key: ", &ctx_sign );
+
+    /*
+     * Compute message hash
+     */
+    mbedtls_printf( "  . Computing message hash..." );
+    fflush( stdout );
+
+    if( ( ret = mbedtls_sha256_ret( message, sizeof( message ), hash, 0 ) ) != 0 )
+    {
+        mbedtls_printf( " failed\n  ! mbedtls_sha256_ret returned %d\n", ret );
+        goto exit;
+    }
+
+    mbedtls_printf( " ok\n" );
+
+    dump_buf( "  + Hash: ", hash, sizeof( hash ) );
+
+    /*
+     * Sign message hash
+     */
+    mbedtls_printf( "  . Signing message hash..." );
+    fflush( stdout );
+
+    if( ( ret = mbedtls_ecdsa_write_signature( &ctx_sign, MBEDTLS_MD_SHA256,
+                                       hash, sizeof( hash ),
+                                       sig, &sig_len,
+                                       mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
+    {
+        mbedtls_printf( " failed\n  ! mbedtls_ecdsa_write_signature returned %d\n", ret );
+        goto exit;
+    }
+    mbedtls_printf( " ok (signature length = %u)\n", (unsigned int) sig_len );
+
+    dump_buf( "  + Signature: ", sig, sig_len );
+
+    /*
+     * Transfer public information to verifying context
+     *
+     * We could use the same context for verification and signatures, but we
+     * chose to use a new one in order to make it clear that the verifying
+     * context only needs the public key (Q), and not the private key (d).
+     */
+    mbedtls_printf( "  . Preparing verification context..." );
+    fflush( stdout );
+
+    if( ( ret = mbedtls_ecp_group_copy( &ctx_verify.grp, &ctx_sign.grp ) ) != 0 )
+    {
+        mbedtls_printf( " failed\n  ! mbedtls_ecp_group_copy returned %d\n", ret );
+        goto exit;
+    }
+
+    if( ( ret = mbedtls_ecp_copy( &ctx_verify.Q, &ctx_sign.Q ) ) != 0 )
+    {
+        mbedtls_printf( " failed\n  ! mbedtls_ecp_copy returned %d\n", ret );
+        goto exit;
+    }
+
+    /*
+     * Verify signature
+     */
+    mbedtls_printf( " ok\n  . Verifying signature..." );
+    fflush( stdout );
+
+    if( ( ret = mbedtls_ecdsa_read_signature( &ctx_verify,
+                                      hash, sizeof( hash ),
+                                      sig, sig_len ) ) != 0 )
+    {
+        mbedtls_printf( " failed\n  ! mbedtls_ecdsa_read_signature returned %d\n", ret );
+        goto exit;
+    }
+
+    mbedtls_printf( " ok\n" );
+
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
+exit:
+
+#if defined(_WIN32)
+    mbedtls_printf( "  + Press Enter to exit this program.\n" );
+    fflush( stdout ); getchar();
+#endif
+
+    mbedtls_ecdsa_free( &ctx_verify );
+    mbedtls_ecdsa_free( &ctx_sign );
+    mbedtls_ctr_drbg_free( &ctr_drbg );
+    mbedtls_entropy_free( &entropy );
+
+    mbedtls_exit( exit_code );
+}
+#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
+          ECPARAMS */