Squashed 'lib/mbedtls/external/mbedtls/' content from commit 2ca6c285a0dd

git-subtree-dir: lib/mbedtls/external/mbedtls
git-subtree-split: 2ca6c285a0dd3f33982dd57299012dacab1ff206

1 files changed, 220 insertions, 0 deletions

diff --git a/programs/pkey/ecdsa.c b/programs/pkey/ecdsa.c
new file mode 100644
index 00000000000..5664b8c4e5d
--- /dev/null
+++ b/programs/pkey/ecdsa.c
@@ -0,0 +1,220 @@
+/*
+ *  Example ECDSA program
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include "mbedtls/build_info.h"
+
+#include "mbedtls/platform.h"
+
+#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_write_public_key(key, 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_ecp_point Q;
+    mbedtls_ecp_point_init(&Q);
+    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_ecp_group_id grp_id = mbedtls_ecp_keypair_get_group_id(&ctx_sign);
+    const mbedtls_ecp_curve_info *curve_info =
+        mbedtls_ecp_curve_info_from_grp_id(grp_id);
+    mbedtls_printf(" ok (key size: %d bits)\n", (int) curve_info->bit_size);
+
+    dump_pubkey("  + Public key: ", &ctx_sign);
+
+    /*
+     * Compute message hash
+     */
+    mbedtls_printf("  . Computing message hash...");
+    fflush(stdout);
+
+    if ((ret = mbedtls_sha256(message, sizeof(message), hash, 0)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_sha256 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, sizeof(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_export(&ctx_sign, NULL, NULL, &Q)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ecp_export returned %d\n", ret);
+        goto exit;
+    }
+
+    if ((ret = mbedtls_ecp_set_public_key(grp_id, &ctx_verify, &Q)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ecp_set_public_key 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:
+
+    mbedtls_ecdsa_free(&ctx_verify);
+    mbedtls_ecdsa_free(&ctx_sign);
+    mbedtls_ecp_point_free(&Q);
+    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 */