--- /dev/null
+/* $OpenBSD: evp_ecx_test.c,v 1.1 2022/11/10 16:38:57 jsing Exp $ */
+/*
+ * Copyright (c) 2022 Joel Sing <jsing@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <err.h>
+#include <string.h>
+
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include <openssl/pem.h>
+
+#include "curve25519_internal.h"
+
+static const uint8_t ed25519_priv_key_1[] = \
+ "-----BEGIN PRIVATE KEY-----\n"
+ "MC4CAQAwBQYDK2VwBCIEIIkDg89yB70IpUXsAZieCcCDE2ig9nin9JJWpDQoCup8\n"
+ "-----END PRIVATE KEY-----\n";
+
+const uint8_t ed25519_raw_priv_key_1[] = {
+ 0x89, 0x03, 0x83, 0xcf, 0x72, 0x07, 0xbd, 0x08,
+ 0xa5, 0x45, 0xec, 0x01, 0x98, 0x9e, 0x09, 0xc0,
+ 0x83, 0x13, 0x68, 0xa0, 0xf6, 0x78, 0xa7, 0xf4,
+ 0x92, 0x56, 0xa4, 0x34, 0x28, 0x0a, 0xea, 0x7c,
+};
+
+static const uint8_t ed25519_pub_key_1[] = \
+ "-----BEGIN PUBLIC KEY-----\n"
+ "MCowBQYDK2VwAyEA1vxPpbnoC7G8vFmRjYVXUU2aln3hUZEgfW1atlTHF/o=\n"
+ "-----END PUBLIC KEY-----\n";
+
+const uint8_t ed25519_raw_pub_key_1[] = {
+ 0xd6, 0xfc, 0x4f, 0xa5, 0xb9, 0xe8, 0x0b, 0xb1,
+ 0xbc, 0xbc, 0x59, 0x91, 0x8d, 0x85, 0x57, 0x51,
+ 0x4d, 0x9a, 0x96, 0x7d, 0xe1, 0x51, 0x91, 0x20,
+ 0x7d, 0x6d, 0x5a, 0xb6, 0x54, 0xc7, 0x17, 0xfa,
+};
+
+static const uint8_t message_1[] = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+};
+
+static const uint8_t signature_1[] = {
+ 0x1c, 0xba, 0x71, 0x5a, 0xbc, 0x7f, 0x3b, 0x6b,
+ 0xc1, 0x61, 0x04, 0x02, 0xb6, 0x37, 0x9e, 0xe1,
+ 0xa6, 0x7c, 0xfe, 0xcd, 0xdd, 0x68, 0x59, 0xb5,
+ 0xc8, 0x09, 0xa5, 0x36, 0x66, 0xfb, 0xad, 0xc5,
+ 0x68, 0x31, 0xd1, 0x7a, 0x48, 0x44, 0xaa, 0xa9,
+ 0x9c, 0xf1, 0x1a, 0xbb, 0xd5, 0x49, 0xd5, 0xe8,
+ 0x63, 0xe2, 0x94, 0x77, 0x16, 0x1a, 0x52, 0xfa,
+ 0x33, 0x6b, 0xf3, 0x57, 0x93, 0xd4, 0xc1, 0x07,
+};
+
+static const uint8_t x25519_priv_key_1[] = \
+ "-----BEGIN PRIVATE KEY-----\n"
+ "MC4CAQAwBQYDK2VuBCIEICi6rzFFJb02mi6sopELeshEi2vr68ul4bzEHPOz+K1o\n"
+ "-----END PRIVATE KEY-----\n";
+
+const uint8_t x25519_raw_priv_key_1[] = {
+ 0x28, 0xba, 0xaf, 0x31, 0x45, 0x25, 0xbd, 0x36,
+ 0x9a, 0x2e, 0xac, 0xa2, 0x91, 0x0b, 0x7a, 0xc8,
+ 0x44, 0x8b, 0x6b, 0xeb, 0xeb, 0xcb, 0xa5, 0xe1,
+ 0xbc, 0xc4, 0x1c, 0xf3, 0xb3, 0xf8, 0xad, 0x68,
+};
+
+static const uint8_t x25519_pub_key_1[] = \
+ "-----BEGIN PUBLIC KEY-----\n"
+ "MCowBQYDK2VuAyEAu4WHXnAQL2YfonJhuoEO9PM2WwXjveApPmCXSiDnf1M=\n"
+ "-----END PUBLIC KEY-----\n";
+
+static const uint8_t x25519_raw_pub_key_1[] = {
+ 0xbb, 0x85, 0x87, 0x5e, 0x70, 0x10, 0x2f, 0x66,
+ 0x1f, 0xa2, 0x72, 0x61, 0xba, 0x81, 0x0e, 0xf4,
+ 0xf3, 0x36, 0x5b, 0x05, 0xe3, 0xbd, 0xe0, 0x29,
+ 0x3e, 0x60, 0x97, 0x4a, 0x20, 0xe7, 0x7f, 0x53,
+};
+
+static const uint8_t x25519_priv_key_2[] = \
+ "-----BEGIN PRIVATE KEY-----\n"
+ "MC4CAQAwBQYDK2VuBCIEIAg9Jbp/Ma0TO4r179WGGiv+VnGxGNRh4VNrHUij7Ql/\n"
+ "-----END PRIVATE KEY-----\n";
+
+static const uint8_t x25519_raw_priv_key_2[] = {
+ 0x08, 0x3d, 0x25, 0xba, 0x7f, 0x31, 0xad, 0x13,
+ 0x3b, 0x8a, 0xf5, 0xef, 0xd5, 0x86, 0x1a, 0x2b,
+ 0xfe, 0x56, 0x71, 0xb1, 0x18, 0xd4, 0x61, 0xe1,
+ 0x53, 0x6b, 0x1d, 0x48, 0xa3, 0xed, 0x09, 0x7f,
+};
+
+static const uint8_t x25519_pub_key_2[] = \
+ "-----BEGIN PUBLIC KEY-----\n"
+ "MCowBQYDK2VuAyEABvksGQRgsUXEK5CaniVZ59pPvDoABgBSdAM+EF0Q9Cw=\n"
+ "-----END PUBLIC KEY-----\n";
+
+static const uint8_t x25519_raw_pub_key_2[] = {
+ 0x06, 0xf9, 0x2c, 0x19, 0x04, 0x60, 0xb1, 0x45,
+ 0xc4, 0x2b, 0x90, 0x9a, 0x9e, 0x25, 0x59, 0xe7,
+ 0xda, 0x4f, 0xbc, 0x3a, 0x00, 0x06, 0x00, 0x52,
+ 0x74, 0x03, 0x3e, 0x10, 0x5d, 0x10, 0xf4, 0x2c,
+};
+
+static const uint8_t shared_key_1[] = {
+ 0xa2, 0x61, 0xf5, 0x91, 0x2e, 0x82, 0xbc, 0x98,
+ 0x6c, 0x85, 0xb6, 0x51, 0x1f, 0x69, 0xdb, 0xfa,
+ 0x88, 0x6c, 0x4b, 0x9e, 0x3b, 0xb0, 0x71, 0xd1,
+ 0xf3, 0xea, 0x2a, 0xd0, 0xef, 0xf6, 0xa5, 0x5a,
+};
+
+static void
+hexdump(const unsigned char *buf, size_t len)
+{
+ size_t i;
+
+ for (i = 1; i <= len; i++)
+ fprintf(stderr, " 0x%02hhx,%s", buf[i - 1], i % 8 ? "" : "\n");
+
+ fprintf(stderr, "\n");
+}
+
+static int
+ecx_ed25519_keygen_test(void)
+{
+ EVP_PKEY_CTX *pkey_ctx = NULL;
+ EVP_PKEY *pkey = NULL;
+ BIO *bio = NULL;
+ int failed = 1;
+
+ if ((pkey_ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_ED25519, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to create ED25519 context\n");
+ goto failure;
+ }
+
+ if (EVP_PKEY_keygen_init(pkey_ctx) <= 0) {
+ fprintf(stderr, "FAIL: failed to init keygen for ED25519\n");
+ goto failure;
+ }
+ if (EVP_PKEY_keygen(pkey_ctx, &pkey) <= 0) {
+ fprintf(stderr, "FAIL: failed to generate ED25519 key\n");
+ goto failure;
+ }
+
+ if ((bio = BIO_new(BIO_s_mem())) == NULL)
+ goto failure;
+ if (!PEM_write_bio_PrivateKey(bio, pkey, NULL, NULL, 0, NULL, NULL)) {
+ fprintf(stderr, "FAIL: failed to write ED25519 to PEM\n");
+ goto failure;
+ }
+
+ failed = 0;
+
+ failure:
+ BIO_free(bio);
+ EVP_PKEY_CTX_free(pkey_ctx);
+ EVP_PKEY_free(pkey);
+
+ return failed;
+}
+
+static int
+ecx_ed25519_raw_key_test(void)
+{
+ EVP_PKEY *pkey = NULL;
+ uint8_t *priv_key = NULL;
+ size_t priv_key_len = 0;
+ uint8_t *pub_key = NULL;
+ size_t pub_key_len = 0;
+ const uint8_t *pp;
+ BIO *bio = NULL;
+ int failed = 1;
+
+ /*
+ * Decode private key from PEM and check raw private and raw public.
+ */
+
+ if ((bio = BIO_new_mem_buf(ed25519_priv_key_1, -1)) == NULL)
+ errx(1, "failed to create BIO for key");
+ if ((pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to read private key\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+
+ if (!EVP_PKEY_get_raw_private_key(pkey, NULL, &priv_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw private key len\n");
+ goto failure;
+ }
+ if (priv_key_len != sizeof(ed25519_raw_priv_key_1)) {
+ fprintf(stderr, "FAIL: raw private key length differs "
+ "(%zu != %zu)\n", priv_key_len,
+ sizeof(ed25519_raw_priv_key_1));
+ goto failure;
+ }
+ if ((priv_key = malloc(priv_key_len)) == NULL)
+ errx(1, "failed to malloc priv key");
+ if (!EVP_PKEY_get_raw_private_key(pkey, priv_key, &priv_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw private key len\n");
+ goto failure;
+ }
+ if (memcmp(priv_key, ed25519_raw_priv_key_1, priv_key_len) != 0) {
+ fprintf(stderr, "FAIL: get raw private key failed\n");
+ fprintf(stderr, "Got:\n");
+ hexdump(priv_key, priv_key_len);
+ fprintf(stderr, "Want:\n");
+ hexdump(ed25519_raw_priv_key_1, sizeof(ed25519_raw_priv_key_1));
+ goto failure;
+ }
+
+ if (!EVP_PKEY_get_raw_public_key(pkey, NULL, &pub_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw pub key len\n");
+ goto failure;
+ }
+ if (pub_key_len != sizeof(ed25519_raw_pub_key_1)) {
+ fprintf(stderr, "FAIL: raw public key length differs "
+ "(%zu != %zu)\n", pub_key_len,
+ sizeof(ed25519_raw_pub_key_1));
+ goto failure;
+ }
+ if ((pub_key = malloc(pub_key_len)) == NULL)
+ errx(1, "failed to malloc private key");
+ if (!EVP_PKEY_get_raw_public_key(pkey, pub_key, &pub_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw pub key len\n");
+ goto failure;
+ }
+ if (memcmp(pub_key, ed25519_raw_pub_key_1, pub_key_len) != 0) {
+ fprintf(stderr, "FAIL: get raw public key failed\n");
+ fprintf(stderr, "Got:\n");
+ hexdump(pub_key, pub_key_len);
+ fprintf(stderr, "Want:\n");
+ hexdump(ed25519_raw_pub_key_1, sizeof(ed25519_raw_pub_key_1));
+ goto failure;
+ }
+
+ BIO_free(bio);
+ bio = NULL;
+
+ EVP_PKEY_free(pkey);
+ pkey = NULL;
+
+ freezero(priv_key, priv_key_len);
+ priv_key = NULL;
+ priv_key_len = 0;
+
+ freezero(pub_key, pub_key_len);
+ pub_key = NULL;
+ pub_key_len = 0;
+
+ /*
+ * Decode public key from PEM and check raw private and raw public.
+ */
+
+ if ((bio = BIO_new_mem_buf(ed25519_pub_key_1, -1)) == NULL)
+ errx(1, "failed to create BIO for key");
+ if ((pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to read public key\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+
+ /*
+ * Yet another astounding API design - we cannot tell if the private key
+ * is not present, or if some other failure occurred.
+ */
+ if (!EVP_PKEY_get_raw_private_key(pkey, NULL, &priv_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw priv key len\n");
+ goto failure;
+ }
+ if ((priv_key = malloc(priv_key_len)) == NULL)
+ errx(1, "failed to malloc priv key");
+ if (EVP_PKEY_get_raw_private_key(pkey, priv_key, &priv_key_len)) {
+ fprintf(stderr, "FAIL: got raw private key, should fail\n");
+ goto failure;
+ }
+
+ if (!EVP_PKEY_get_raw_public_key(pkey, NULL, &pub_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw pub key len\n");
+ goto failure;
+ }
+ if (pub_key_len != sizeof(ed25519_raw_pub_key_1)) {
+ fprintf(stderr, "FAIL: raw public key length differs "
+ "(%zu != %zu)\n", pub_key_len,
+ sizeof(ed25519_raw_pub_key_1));
+ goto failure;
+ }
+ if ((pub_key = malloc(pub_key_len)) == NULL)
+ errx(1, "failed to malloc private key");
+ if (!EVP_PKEY_get_raw_public_key(pkey, pub_key, &pub_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw pub key len\n");
+ goto failure;
+ }
+ if (memcmp(pub_key, ed25519_raw_pub_key_1, pub_key_len) != 0) {
+ fprintf(stderr, "FAIL: get raw public key failed\n");
+ fprintf(stderr, "Got:\n");
+ hexdump(pub_key, pub_key_len);
+ fprintf(stderr, "Want:\n");
+ hexdump(ed25519_raw_pub_key_1, sizeof(ed25519_raw_pub_key_1));
+ goto failure;
+ }
+
+ BIO_free(bio);
+ bio = NULL;
+
+ EVP_PKEY_free(pkey);
+ pkey = NULL;
+
+ /*
+ * Create PKEY from raw private, check PEM encoded private and public.
+ */
+ if ((pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, NULL,
+ ed25519_raw_priv_key_1, sizeof(ed25519_raw_priv_key_1))) == NULL) {
+ fprintf(stderr, "FAIL: PKEY from raw private key failed");
+ goto failure;
+ }
+ if ((bio = BIO_new(BIO_s_mem())) == NULL)
+ goto failure;
+ if (!PEM_write_bio_PrivateKey(bio, pkey, NULL, NULL, 0, NULL, NULL)) {
+ fprintf(stderr, "FAIL: failed to write ED25519 private to PEM\n");
+ goto failure;
+ }
+ BIO_get_mem_data(bio, &pp);
+ if (strcmp(ed25519_priv_key_1, pp) != 0) {
+ fprintf(stderr, "FAIL: resulting private key PEM differs\n");
+ goto failure;
+ }
+
+ BIO_reset(bio);
+ if (!PEM_write_bio_PUBKEY(bio, pkey)) {
+ fprintf(stderr, "FAIL: failed to write ED25519 public to PEM\n");
+ goto failure;
+ }
+ BIO_get_mem_data(bio, &pp);
+ if (strcmp(ed25519_pub_key_1, pp) != 0) {
+ fprintf(stderr, "FAIL: resulting public key PEM differs\n");
+ fprintf(stderr, "%s\n", ed25519_pub_key_1);
+ fprintf(stderr, "%s\n", pp);
+ //goto failure;
+ }
+
+ EVP_PKEY_free(pkey);
+ pkey = NULL;
+
+ /*
+ * Create PKEY from raw public, check public key PEM.
+ */
+ if ((pkey = EVP_PKEY_new_raw_public_key(EVP_PKEY_ED25519, NULL,
+ ed25519_raw_pub_key_1, sizeof(ed25519_raw_pub_key_1))) == NULL) {
+ fprintf(stderr, "FAIL: PKEY from raw public key failed");
+ goto failure;
+ }
+ BIO_reset(bio);
+ if (!PEM_write_bio_PUBKEY(bio, pkey)) {
+ fprintf(stderr, "FAIL: failed to write ED25519 public to PEM\n");
+ goto failure;
+ }
+ BIO_get_mem_data(bio, &pp);
+ if (strcmp(ed25519_pub_key_1, pp) != 0) {
+ fprintf(stderr, "FAIL: resulting public key PEM differs\n");
+ goto failure;
+ }
+
+ failed = 0;
+
+ failure:
+ BIO_free(bio);
+ EVP_PKEY_free(pkey);
+ freezero(priv_key, priv_key_len);
+ freezero(pub_key, pub_key_len);
+
+ return failed;
+}
+
+static int
+ecx_ed25519_sign_test(void)
+{
+ EVP_MD_CTX *md_ctx = NULL;
+ EVP_PKEY *pkey = NULL;
+ uint8_t *signature = NULL;
+ size_t signature_len = 0;
+ BIO *bio = NULL;
+ int failed = 1;
+
+ if ((bio = BIO_new_mem_buf(ed25519_priv_key_1, -1)) == NULL)
+ errx(1, "failed to create BIO for key");
+ if ((pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to read private key\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+
+ if ((md_ctx = EVP_MD_CTX_new()) == NULL)
+ errx(1, "failed to create MD_CTX");
+
+ if (!EVP_DigestSignInit(md_ctx, NULL, NULL, NULL, pkey)) {
+ fprintf(stderr, "FAIL: failed to init digest sign\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+ if (!EVP_DigestSign(md_ctx, NULL, &signature_len, NULL, 0)) {
+ fprintf(stderr, "FAIL: failed to digest sign update\n");
+ goto failure;
+ }
+ if ((signature = calloc(1, signature_len)) == NULL)
+ errx(1, "failed to allocate signature");
+ if (!EVP_DigestSign(md_ctx, signature, &signature_len, message_1,
+ sizeof(message_1))) {
+ fprintf(stderr, "FAIL: failed to digest sign update\n");
+ goto failure;
+ }
+
+ if (signature_len != sizeof(signature_1)) {
+ fprintf(stderr, "FAIL: signature length differs (%zu != %zu)\n",
+ signature_len, sizeof(signature_1));
+ goto failure;
+ }
+
+ if (memcmp(signature, signature_1, signature_len) != 0) {
+ fprintf(stderr, "FAIL: Ed25519 sign failed\n");
+ fprintf(stderr, "Got:\n");
+ hexdump(signature, signature_len);
+ fprintf(stderr, "Want:\n");
+ hexdump(signature_1, sizeof(signature_1));
+ goto failure;
+ }
+
+ failed = 0;
+
+ failure:
+ BIO_free(bio);
+ EVP_PKEY_free(pkey);
+ free(signature);
+
+ return failed;
+}
+
+static int
+ecx_ed25519_verify_test(void)
+{
+ EVP_MD_CTX *md_ctx = NULL;
+ EVP_PKEY *pkey = NULL;
+ BIO *bio = NULL;
+ int failed = 1;
+
+ if ((bio = BIO_new_mem_buf(ed25519_pub_key_1, -1)) == NULL)
+ errx(1, "failed to create BIO for key");
+ if ((pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to read public key\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+
+ if ((md_ctx = EVP_MD_CTX_new()) == NULL)
+ errx(1, "failed to create MD_CTX");
+
+ if (!EVP_DigestVerifyInit(md_ctx, NULL, NULL, NULL, pkey)) {
+ fprintf(stderr, "FAIL: failed to init digest verify\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+ if (!EVP_DigestVerify(md_ctx, signature_1, sizeof(signature_1),
+ message_1, sizeof(message_1))) {
+ fprintf(stderr, "FAIL: failed to digest verify update\n");
+ goto failure;
+ }
+
+ failed = 0;
+
+ failure:
+ BIO_free(bio);
+ EVP_PKEY_free(pkey);
+
+ return failed;
+}
+
+static int
+ecx_x25519_keygen_test(void)
+{
+ EVP_PKEY_CTX *pkey_ctx = NULL;
+ EVP_PKEY *pkey = NULL;
+ BIO *bio = NULL;
+ int failed = 1;
+
+ if ((pkey_ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to create X25519 context\n");
+ goto failure;
+ }
+
+ if (EVP_PKEY_keygen_init(pkey_ctx) <= 0) {
+ fprintf(stderr, "FAIL: failed to init keygen for X25519\n");
+ goto failure;
+ }
+ if (EVP_PKEY_keygen(pkey_ctx, &pkey) <= 0) {
+ fprintf(stderr, "FAIL: failed to generate X25519 key\n");
+ goto failure;
+ }
+
+ if ((bio = BIO_new(BIO_s_mem())) == NULL)
+ goto failure;
+ if (!PEM_write_bio_PrivateKey(bio, pkey, NULL, NULL, 0, NULL, NULL)) {
+ fprintf(stderr, "FAIL: failed to write X25519 to PEM\n");
+ goto failure;
+ }
+
+ failed = 0;
+
+ failure:
+ BIO_free(bio);
+ EVP_PKEY_CTX_free(pkey_ctx);
+ EVP_PKEY_free(pkey);
+
+ return failed;
+}
+
+static int
+ecx_x25519_derive_test(void)
+{
+ EVP_PKEY_CTX *pkey_ctx = NULL;
+ EVP_PKEY *pkey = NULL, *pkey_peer = NULL;
+ uint8_t *shared_key = NULL;
+ size_t shared_key_len = 0;
+ BIO *bio = NULL;
+ int failed = 1;
+
+ if ((bio = BIO_new_mem_buf(x25519_priv_key_1, -1)) == NULL)
+ errx(1, "failed to create BIO for key");
+ if ((pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to read private key\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+
+ BIO_free(bio);
+ if ((bio = BIO_new_mem_buf(x25519_pub_key_2, -1)) == NULL)
+ errx(1, "failed to create BIO for key");
+ if ((pkey_peer = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to read peer public key\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+
+ if ((pkey_ctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to create X25519 context\n");
+ goto failure;
+ }
+ if (EVP_PKEY_derive_init(pkey_ctx) <= 0) {
+ fprintf(stderr, "FAIL: failed to init derive for X25519\n");
+ goto failure;
+ }
+ if (EVP_PKEY_derive_set_peer(pkey_ctx, pkey_peer) <= 0) {
+ fprintf(stderr, "FAIL: failed to set peer key for X25519\n");
+ goto failure;
+ }
+ if (EVP_PKEY_derive(pkey_ctx, NULL, &shared_key_len) <= 0) {
+ fprintf(stderr, "FAIL: failed to derive X25519 key length\n");
+ goto failure;
+ }
+ if ((shared_key = malloc(shared_key_len)) == NULL)
+ errx(1, "failed to malloc shared key");
+ if (EVP_PKEY_derive(pkey_ctx, shared_key, &shared_key_len) <= 0) {
+ fprintf(stderr, "FAIL: failed to derive X25519 key\n");
+ goto failure;
+ }
+
+ if (shared_key_len != sizeof(shared_key_1)) {
+ fprintf(stderr, "FAIL: shared key length differs (%zu != %zu)\n",
+ shared_key_len, sizeof(shared_key_1));
+ goto failure;
+ }
+
+ if (memcmp(shared_key, shared_key_1, shared_key_len) != 0) {
+ fprintf(stderr, "FAIL: X25519 derive failed\n");
+ fprintf(stderr, "Got:\n");
+ hexdump(shared_key, shared_key_len);
+ fprintf(stderr, "Want:\n");
+ hexdump(shared_key_1, sizeof(shared_key_1));
+ goto failure;
+ }
+
+ failed = 0;
+
+ failure:
+ BIO_free(bio);
+ EVP_PKEY_CTX_free(pkey_ctx);
+ EVP_PKEY_free(pkey_peer);
+ EVP_PKEY_free(pkey);
+ freezero(shared_key, shared_key_len);
+
+ return failed;
+}
+
+static int
+ecx_x25519_raw_key_test(void)
+{
+ EVP_PKEY *pkey = NULL;
+ uint8_t *priv_key = NULL;
+ size_t priv_key_len = 0;
+ uint8_t *pub_key = NULL;
+ size_t pub_key_len = 0;
+ const uint8_t *pp;
+ BIO *bio = NULL;
+ int failed = 1;
+
+ /*
+ * Decode private key from PEM and check raw private and raw public.
+ */
+
+ if ((bio = BIO_new_mem_buf(x25519_priv_key_2, -1)) == NULL)
+ errx(1, "failed to create BIO for key");
+ if ((pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to read private key\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+
+ if (!EVP_PKEY_get_raw_private_key(pkey, NULL, &priv_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw private key len\n");
+ goto failure;
+ }
+ if (priv_key_len != sizeof(x25519_raw_priv_key_2)) {
+ fprintf(stderr, "FAIL: raw private key length differs "
+ "(%zu != %zu)\n", priv_key_len,
+ sizeof(x25519_raw_priv_key_2));
+ goto failure;
+ }
+ if ((priv_key = malloc(priv_key_len)) == NULL)
+ errx(1, "failed to malloc priv key");
+ if (!EVP_PKEY_get_raw_private_key(pkey, priv_key, &priv_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw private key len\n");
+ goto failure;
+ }
+ if (memcmp(priv_key, x25519_raw_priv_key_2, priv_key_len) != 0) {
+ fprintf(stderr, "FAIL: get raw private key failed\n");
+ fprintf(stderr, "Got:\n");
+ hexdump(priv_key, priv_key_len);
+ fprintf(stderr, "Want:\n");
+ hexdump(x25519_raw_priv_key_2, sizeof(x25519_raw_priv_key_2));
+ goto failure;
+ }
+
+ if (!EVP_PKEY_get_raw_public_key(pkey, NULL, &pub_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw pub key len\n");
+ goto failure;
+ }
+ if (pub_key_len != sizeof(x25519_raw_pub_key_2)) {
+ fprintf(stderr, "FAIL: raw public key length differs "
+ "(%zu != %zu)\n", pub_key_len,
+ sizeof(x25519_raw_pub_key_2));
+ goto failure;
+ }
+ if ((pub_key = malloc(pub_key_len)) == NULL)
+ errx(1, "failed to malloc private key");
+ if (!EVP_PKEY_get_raw_public_key(pkey, pub_key, &pub_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw pub key len\n");
+ goto failure;
+ }
+ if (memcmp(pub_key, x25519_raw_pub_key_2, pub_key_len) != 0) {
+ fprintf(stderr, "FAIL: get raw public key failed\n");
+ fprintf(stderr, "Got:\n");
+ hexdump(pub_key, pub_key_len);
+ fprintf(stderr, "Want:\n");
+ hexdump(x25519_raw_pub_key_2, sizeof(x25519_raw_pub_key_2));
+ goto failure;
+ }
+
+ BIO_free(bio);
+ bio = NULL;
+
+ EVP_PKEY_free(pkey);
+ pkey = NULL;
+
+ freezero(priv_key, priv_key_len);
+ priv_key = NULL;
+ priv_key_len = 0;
+
+ freezero(pub_key, pub_key_len);
+ pub_key = NULL;
+ pub_key_len = 0;
+
+ /*
+ * Decode public key from PEM and check raw private and raw public.
+ */
+
+ if ((bio = BIO_new_mem_buf(x25519_pub_key_1, -1)) == NULL)
+ errx(1, "failed to create BIO for key");
+ if ((pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL)) == NULL) {
+ fprintf(stderr, "FAIL: failed to read public key\n");
+ ERR_print_errors_fp(stderr);
+ goto failure;
+ }
+
+ /*
+ * Yet another astounding API design - we cannot tell if the private key
+ * is not present, or if some other failure occurred.
+ */
+ if (!EVP_PKEY_get_raw_private_key(pkey, NULL, &priv_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw priv key len\n");
+ goto failure;
+ }
+ if ((priv_key = malloc(priv_key_len)) == NULL)
+ errx(1, "failed to malloc priv key");
+ if (EVP_PKEY_get_raw_private_key(pkey, priv_key, &priv_key_len)) {
+ fprintf(stderr, "FAIL: got raw private key, should fail\n");
+ goto failure;
+ }
+
+ if (!EVP_PKEY_get_raw_public_key(pkey, NULL, &pub_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw pub key len\n");
+ goto failure;
+ }
+ if (pub_key_len != sizeof(x25519_raw_pub_key_1)) {
+ fprintf(stderr, "FAIL: raw public key length differs "
+ "(%zu != %zu)\n", pub_key_len,
+ sizeof(x25519_raw_pub_key_2));
+ goto failure;
+ }
+ if ((pub_key = malloc(pub_key_len)) == NULL)
+ errx(1, "failed to malloc private key");
+ if (!EVP_PKEY_get_raw_public_key(pkey, pub_key, &pub_key_len)) {
+ fprintf(stderr, "FAIL: failed to get raw pub key len\n");
+ goto failure;
+ }
+ if (memcmp(pub_key, x25519_raw_pub_key_1, pub_key_len) != 0) {
+ fprintf(stderr, "FAIL: get raw public key failed\n");
+ fprintf(stderr, "Got:\n");
+ hexdump(pub_key, pub_key_len);
+ fprintf(stderr, "Want:\n");
+ hexdump(x25519_raw_pub_key_2, sizeof(x25519_raw_pub_key_2));
+ goto failure;
+ }
+
+ BIO_free(bio);
+ bio = NULL;
+
+ EVP_PKEY_free(pkey);
+ pkey = NULL;
+
+ /*
+ * Create PKEY from raw private, check PEM encoded private and public.
+ */
+ if ((pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_X25519, NULL,
+ x25519_raw_priv_key_2, sizeof(x25519_raw_priv_key_2))) == NULL) {
+ fprintf(stderr, "FAIL: PKEY from raw private key failed");
+ goto failure;
+ }
+ if ((bio = BIO_new(BIO_s_mem())) == NULL)
+ goto failure;
+ if (!PEM_write_bio_PrivateKey(bio, pkey, NULL, NULL, 0, NULL, NULL)) {
+ fprintf(stderr, "FAIL: failed to write X25519 private to PEM\n");
+ goto failure;
+ }
+ BIO_get_mem_data(bio, &pp);
+ if (strcmp(x25519_priv_key_2, pp) != 0) {
+ fprintf(stderr, "FAIL: resulting private key PEM differs\n");
+ goto failure;
+ }
+
+ BIO_reset(bio);
+ if (!PEM_write_bio_PUBKEY(bio, pkey)) {
+ fprintf(stderr, "FAIL: failed to write X25519 public to PEM\n");
+ goto failure;
+ }
+ BIO_get_mem_data(bio, &pp);
+ if (strcmp(x25519_pub_key_2, pp) != 0) {
+ fprintf(stderr, "FAIL: resulting public key PEM differs\n");
+ goto failure;
+ }
+
+ EVP_PKEY_free(pkey);
+ pkey = NULL;
+
+ /*
+ * Create PKEY from raw public, check public key PEM.
+ */
+ if ((pkey = EVP_PKEY_new_raw_public_key(EVP_PKEY_X25519, NULL,
+ x25519_raw_pub_key_1, sizeof(x25519_raw_pub_key_1))) == NULL) {
+ fprintf(stderr, "FAIL: PKEY from raw public key failed");
+ goto failure;
+ }
+ BIO_reset(bio);
+ if (!PEM_write_bio_PUBKEY(bio, pkey)) {
+ fprintf(stderr, "FAIL: failed to write X25519 public to PEM\n");
+ goto failure;
+ }
+ BIO_get_mem_data(bio, &pp);
+ if (strcmp(x25519_pub_key_1, pp) != 0) {
+ fprintf(stderr, "FAIL: resulting public key PEM differs\n");
+ goto failure;
+ }
+
+ failed = 0;
+
+ failure:
+ BIO_free(bio);
+ EVP_PKEY_free(pkey);
+ freezero(priv_key, priv_key_len);
+ freezero(pub_key, pub_key_len);
+
+ return failed;
+}
+
+int
+main(int argc, char **argv)
+{
+ int failed = 0;
+
+ failed |= ecx_ed25519_raw_key_test();
+ failed |= ecx_ed25519_keygen_test();
+ failed |= ecx_ed25519_sign_test();
+ failed |= ecx_ed25519_verify_test();
+
+ failed |= ecx_x25519_keygen_test();
+ failed |= ecx_x25519_derive_test();
+ failed |= ecx_x25519_raw_key_test();
+
+ return failed;
+}
projects / openbsd / commitdiff