1 files changed, 204 insertions, 0 deletions
diff --git a/libs/libsodium/src/crypto_box/curve25519xchacha20poly1305/box_curve25519xchacha20poly1305.c b/libs/libsodium/src/crypto_box/curve25519xchacha20poly1305/box_curve25519xchacha20poly1305.c
new file mode 100644
index 0000000000..5e2532eab7
--- /dev/null
+++ b/libs/libsodium/src/crypto_box/curve25519xchacha20poly1305/box_curve25519xchacha20poly1305.c
@@ -0,0 +1,204 @@
+
+#include <limits.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "core.h"
+#include "crypto_box_curve25519xchacha20poly1305.h"
+#include "crypto_core_hchacha20.h"
+#include "crypto_hash_sha512.h"
+#include "crypto_scalarmult_curve25519.h"
+#include "crypto_secretbox_xchacha20poly1305.h"
+#include "private/common.h"
+#include "randombytes.h"
+#include "utils.h"
+
+int
+crypto_box_curve25519xchacha20poly1305_seed_keypair(unsigned char *pk,
+                                                    unsigned char *sk,
+                                                    const unsigned char *seed)
+{
+    unsigned char hash[64];
+
+    crypto_hash_sha512(hash, seed, 32);
+    memcpy(sk, hash, 32);
+    sodium_memzero(hash, sizeof hash);
+
+    return crypto_scalarmult_curve25519_base(pk, sk);
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_keypair(unsigned char *pk,
+                                               unsigned char *sk)
+{
+    randombytes_buf(sk, 32);
+
+    return crypto_scalarmult_curve25519_base(pk, sk);
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_beforenm(unsigned char *k,
+                                                const unsigned char *pk,
+                                                const unsigned char *sk)
+{
+    static const unsigned char zero[16] = { 0 };
+    unsigned char s[32];
+
+    if (crypto_scalarmult_curve25519(s, sk, pk) != 0) {
+        return -1;
+    }
+    return crypto_core_hchacha20(k, zero, s, NULL);
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_detached_afternm(
+    unsigned char *c, unsigned char *mac, const unsigned char *m,
+    unsigned long long mlen, const unsigned char *n, const unsigned char *k)
+{
+    return crypto_secretbox_xchacha20poly1305_detached(c, mac, m, mlen, n, k);
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_detached(
+    unsigned char *c, unsigned char *mac, const unsigned char *m,
+    unsigned long long mlen, const unsigned char *n, const unsigned char *pk,
+    const unsigned char *sk)
+{
+    unsigned char k[crypto_box_curve25519xchacha20poly1305_BEFORENMBYTES];
+    int           ret;
+
+    COMPILER_ASSERT(crypto_box_curve25519xchacha20poly1305_BEFORENMBYTES >=
+                    crypto_secretbox_xchacha20poly1305_KEYBYTES);
+    if (crypto_box_curve25519xchacha20poly1305_beforenm(k, pk, sk) != 0) {
+        return -1;
+    }
+    ret = crypto_box_curve25519xchacha20poly1305_detached_afternm(c, mac, m,
+                                                                  mlen, n, k);
+    sodium_memzero(k, sizeof k);
+
+    return ret;
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_easy_afternm(unsigned char *c,
+                                                    const unsigned char *m,
+                                                    unsigned long long mlen,
+                                                    const unsigned char *n,
+                                                    const unsigned char *k)
+{
+    if (mlen > crypto_box_curve25519xchacha20poly1305_MESSAGEBYTES_MAX) {
+        sodium_misuse();
+    }
+    return crypto_box_curve25519xchacha20poly1305_detached_afternm(
+        c + crypto_box_curve25519xchacha20poly1305_MACBYTES, c, m, mlen, n, k);
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_easy(
+    unsigned char *c, const unsigned char *m, unsigned long long mlen,
+    const unsigned char *n, const unsigned char *pk, const unsigned char *sk)
+{
+    if (mlen > crypto_box_curve25519xchacha20poly1305_MESSAGEBYTES_MAX) {
+        sodium_misuse();
+    }
+    return crypto_box_curve25519xchacha20poly1305_detached(
+        c + crypto_box_curve25519xchacha20poly1305_MACBYTES, c, m, mlen, n, pk,
+        sk);
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_open_detached_afternm(
+    unsigned char *m, const unsigned char *c, const unsigned char *mac,
+    unsigned long long clen, const unsigned char *n, const unsigned char *k)
+{
+    return crypto_secretbox_xchacha20poly1305_open_detached(m, c, mac, clen, n,
+                                                            k);
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_open_detached(
+    unsigned char *m, const unsigned char *c, const unsigned char *mac,
+    unsigned long long clen, const unsigned char *n, const unsigned char *pk,
+    const unsigned char *sk)
+{
+    unsigned char k[crypto_box_curve25519xchacha20poly1305_BEFORENMBYTES];
+    int           ret;
+
+    if (crypto_box_curve25519xchacha20poly1305_beforenm(k, pk, sk) != 0) {
+        return -1;
+    }
+    ret = crypto_box_curve25519xchacha20poly1305_open_detached_afternm(
+        m, c, mac, clen, n, k);
+    sodium_memzero(k, sizeof k);
+
+    return ret;
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_open_easy_afternm(
+    unsigned char *m, const unsigned char *c, unsigned long long clen,
+    const unsigned char *n, const unsigned char *k)
+{
+    if (clen < crypto_box_curve25519xchacha20poly1305_MACBYTES) {
+        return -1;
+    }
+    return crypto_box_curve25519xchacha20poly1305_open_detached_afternm(
+        m, c + crypto_box_curve25519xchacha20poly1305_MACBYTES, c,
+        clen - crypto_box_curve25519xchacha20poly1305_MACBYTES, n, k);
+}
+
+int
+crypto_box_curve25519xchacha20poly1305_open_easy(
+    unsigned char *m, const unsigned char *c, unsigned long long clen,
+    const unsigned char *n, const unsigned char *pk, const unsigned char *sk)
+{
+    if (clen < crypto_box_curve25519xchacha20poly1305_MACBYTES) {
+        return -1;
+    }
+    return crypto_box_curve25519xchacha20poly1305_open_detached(
+        m, c + crypto_box_curve25519xchacha20poly1305_MACBYTES, c,
+        clen - crypto_box_curve25519xchacha20poly1305_MACBYTES, n, pk, sk);
+}
+
+size_t
+crypto_box_curve25519xchacha20poly1305_seedbytes(void)
+{
+    return crypto_box_curve25519xchacha20poly1305_SEEDBYTES;
+}
+
+size_t
+crypto_box_curve25519xchacha20poly1305_publickeybytes(void)
+{
+    return crypto_box_curve25519xchacha20poly1305_PUBLICKEYBYTES;
+}
+
+size_t
+crypto_box_curve25519xchacha20poly1305_secretkeybytes(void)
+{
+    return crypto_box_curve25519xchacha20poly1305_SECRETKEYBYTES;
+}
+
+size_t
+crypto_box_curve25519xchacha20poly1305_beforenmbytes(void)
+{
+    return crypto_box_curve25519xchacha20poly1305_BEFORENMBYTES;
+}
+
+size_t
+crypto_box_curve25519xchacha20poly1305_noncebytes(void)
+{
+    return crypto_box_curve25519xchacha20poly1305_NONCEBYTES;
+}
+
+size_t
+crypto_box_curve25519xchacha20poly1305_macbytes(void)
+{
+    return crypto_box_curve25519xchacha20poly1305_MACBYTES;
+}
+
+size_t
+crypto_box_curve25519xchacha20poly1305_messagebytes_max(void)
+{
+    return crypto_box_curve25519xchacha20poly1305_MESSAGEBYTES_MAX;
+}