1 files changed, 211 insertions, 0 deletions

diff --git a/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/pwhash_scryptsalsa208sha256.c b/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/pwhash_scryptsalsa208sha256.c
new file mode 100644
index 00000000..52c51abc
--- /dev/null
+++ b/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/pwhash_scryptsalsa208sha256.c
@@ -0,0 +1,211 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#ifdef  VANILLA_NACL /* toxcore only uses this when libsodium is unavailable */
+
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+//#include <stdio.h>
+
+#include "crypto_pwhash_scryptsalsa208sha256.h"
+#include "crypto_scrypt.h"
+#include "randombytes.h"
+#include "utils.h"
+
+#define SETTING_SIZE(saltbytes) \
+    (sizeof "$7$" - 1U) + \
+    (1U /* N_log2 */) + (5U /* r */) + (5U /* p */) + BYTES2CHARS(saltbytes)
+
+static int
+pickparams(unsigned long long opslimit, const size_t memlimit,
+           uint32_t * const N_log2, uint32_t * const p, uint32_t * const r)
+{
+    unsigned long long maxN;
+    unsigned long long maxrp;
+
+    if (opslimit < 32768) {
+        opslimit = 32768;
+    }
+    *r = 8;
+    if (opslimit < memlimit / 32) {
+        *p = 1;
+        maxN = opslimit / (*r * 4);
+        for (*N_log2 = 1; *N_log2 < 63; *N_log2 += 1) {
+            if ((uint64_t)(1) << *N_log2 > maxN / 2) {
+                break;
+            }
+        }
+    } else {
+        maxN = memlimit / (*r * 128);
+        for (*N_log2 = 1; *N_log2 < 63; *N_log2 += 1) {
+            if ((uint64_t) (1) << *N_log2 > maxN / 2) {
+                break;
+            }
+        }
+        maxrp = (opslimit / 4) / ((uint64_t) (1) << *N_log2);
+        if (maxrp > 0x3fffffff) {
+            maxrp = 0x3fffffff;
+        }
+        *p = (uint32_t) (maxrp) / *r;
+    }
+    return 0;
+}
+
+size_t
+crypto_pwhash_scryptsalsa208sha256_saltbytes(void)
+{
+    return crypto_pwhash_scryptsalsa208sha256_SALTBYTES;
+}
+
+size_t
+crypto_pwhash_scryptsalsa208sha256_strbytes(void)
+{
+    return crypto_pwhash_scryptsalsa208sha256_STRBYTES;
+}
+
+const char *
+crypto_pwhash_scryptsalsa208sha256_strprefix(void)
+{
+    return crypto_pwhash_scryptsalsa208sha256_STRPREFIX;
+}
+
+size_t
+crypto_pwhash_scryptsalsa208sha256_opslimit_interactive(void)
+{
+    return crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_INTERACTIVE;
+}
+
+size_t
+crypto_pwhash_scryptsalsa208sha256_memlimit_interactive(void)
+{
+    return crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_INTERACTIVE;
+}
+
+size_t
+crypto_pwhash_scryptsalsa208sha256_opslimit_sensitive(void)
+{
+    return crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_SENSITIVE;
+}
+
+size_t
+crypto_pwhash_scryptsalsa208sha256_memlimit_sensitive(void)
+{
+    return crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_SENSITIVE;
+}
+
+int
+crypto_pwhash_scryptsalsa208sha256(unsigned char * const out,
+                                    unsigned long long outlen,
+                                    const char * const passwd,
+                                    unsigned long long passwdlen,
+                                    const unsigned char * const salt,
+                                    unsigned long long opslimit,
+                                    size_t memlimit)
+{
+    //fprintf(stderr, "Doing that dirty thang!!!!\n");
+    uint32_t N_log2;
+    uint32_t p;
+    uint32_t r;
+
+    memset(out, 0, outlen);
+    if (passwdlen > SIZE_MAX || outlen > SIZE_MAX) {
+        errno = EFBIG;
+        return -1;
+    }
+    if (pickparams(opslimit, memlimit, &N_log2, &p, &r) != 0) {
+        errno = EINVAL;
+        return -1;
+    }
+    return crypto_pwhash_scryptsalsa208sha256_ll((const uint8_t *) passwd,
+                                                 (size_t) passwdlen,
+                                                 (const uint8_t *) salt,
+                                                 crypto_pwhash_scryptsalsa208sha256_SALTBYTES,
+                                                 (uint64_t) (1) << N_log2, r, p,
+                                                 out, (size_t) outlen);
+}
+
+int
+crypto_pwhash_scryptsalsa208sha256_str(char out[crypto_pwhash_scryptsalsa208sha256_STRBYTES],
+                                        const char * const passwd,
+                                        unsigned long long passwdlen,
+                                        unsigned long long opslimit,
+                                        size_t memlimit)
+{
+    uint8_t         salt[crypto_pwhash_scryptsalsa208sha256_STRSALTBYTES];
+    char            setting[crypto_pwhash_scryptsalsa208sha256_STRSETTINGBYTES + 1U];
+    escrypt_local_t escrypt_local;
+    uint32_t        N_log2;
+    uint32_t        p;
+    uint32_t        r;
+
+    memset(out, 0, crypto_pwhash_scryptsalsa208sha256_STRBYTES);
+    if (passwdlen > SIZE_MAX) {
+        errno = EFBIG;
+        return -1;
+    }
+    if (pickparams(opslimit, memlimit, &N_log2, &p, &r) != 0) {
+        errno = EINVAL;
+        return -1;
+    }
+    randombytes(salt, sizeof salt);
+    if (escrypt_gensalt_r(N_log2, r, p, salt, sizeof salt,
+                          (uint8_t *) setting, sizeof setting) == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+    if (escrypt_init_local(&escrypt_local) != 0) {
+        return -1;
+    }
+    if (escrypt_r(&escrypt_local, (const uint8_t *) passwd, (size_t) passwdlen,
+                  (const uint8_t *) setting, (uint8_t *) out,
+                  crypto_pwhash_scryptsalsa208sha256_STRBYTES) == NULL) {
+        escrypt_free_local(&escrypt_local);
+        errno = EINVAL;
+        return -1;
+    }
+    escrypt_free_local(&escrypt_local);
+
+    (void) sizeof
+        (int[SETTING_SIZE(crypto_pwhash_scryptsalsa208sha256_STRSALTBYTES)
+            == crypto_pwhash_scryptsalsa208sha256_STRSETTINGBYTES ? 1 : -1]);
+    (void) sizeof
+        (int[crypto_pwhash_scryptsalsa208sha256_STRSETTINGBYTES + 1U +
+             crypto_pwhash_scryptsalsa208sha256_STRHASHBYTES_ENCODED + 1U
+             == crypto_pwhash_scryptsalsa208sha256_STRBYTES ? 1 : -1]);
+
+    return 0;
+}
+
+int
+crypto_pwhash_scryptsalsa208sha256_str_verify(const char str[crypto_pwhash_scryptsalsa208sha256_STRBYTES],
+                                               const char * const passwd,
+                                               unsigned long long passwdlen)
+{
+    char            wanted[crypto_pwhash_scryptsalsa208sha256_STRBYTES];
+    escrypt_local_t escrypt_local;
+    int             ret = -1;
+
+    if (memchr(str, 0, crypto_pwhash_scryptsalsa208sha256_STRBYTES) !=
+        &str[crypto_pwhash_scryptsalsa208sha256_STRBYTES - 1U]) {
+        return -1;
+    }
+    if (escrypt_init_local(&escrypt_local) != 0) {
+        return -1;
+    }
+    if (escrypt_r(&escrypt_local, (const uint8_t *) passwd, (size_t) passwdlen,
+                  (const uint8_t *) str, (uint8_t *) wanted,
+                  sizeof wanted) == NULL) {
+        escrypt_free_local(&escrypt_local);
+        return -1;
+    }
+    escrypt_free_local(&escrypt_local);
+    ret = sodium_memcmp(wanted, str, sizeof wanted);
+    sodium_memzero(wanted, sizeof wanted);
+
+    return ret;
+}
+
+#endif