Add crypto_pwhash_argon2i_ALG_ARGON2I13

src/libsodium/crypto_pwhash/argon2/pwhash_argon2i.c

@@ -13,6 +13,12 @@
 
 #define STR_HASHBYTES 32U
 
+int
+crypto_pwhash_argon2i_alg_argon2i13(void)
+{
+    return crypto_pwhash_argon2i_ALG_ARGON2I13;
+}
+
 size_t
 crypto_pwhash_argon2i_saltbytes(void)
 {
@@ -74,8 +80,11 @@ crypto_pwhash_argon2i(unsigned char * const out,
                       unsigned long long passwdlen,
                       const unsigned char * const salt,
                       unsigned long long opslimit,
-                      size_t memlimit)
+                      size_t memlimit, int alg)
 {
+    if (alg != crypto_pwhash_argon2i_ALG_ARGON2I13) {
+        return -1;
+    }
     memlimit /= 1024U;
     if (outlen > ARGON2_MAX_OUTLEN || passwdlen > ARGON2_MAX_PWD_LENGTH ||
         opslimit > ARGON2_MAX_TIME || memlimit > ARGON2_MAX_MEMORY) {

src/libsodium/crypto_pwhash/crypto_pwhash.c

@@ -80,7 +80,7 @@ crypto_pwhash(unsigned char * const out, unsigned long long outlen,
         return -1;
     }
     return crypto_pwhash_argon2i(out, outlen, passwd, passwdlen, salt,
-                                 opslimit, memlimit);
+                                 opslimit, memlimit, alg);
 }
 
 int

src/libsodium/include/sodium/crypto_pwhash.h

@@ -13,7 +13,7 @@
 extern "C" {
 #endif
 
-#define crypto_pwhash_ALG_ARGON2I13 1
+#define crypto_pwhash_ALG_ARGON2I13 crypto_pwhash_argon2i_ALG_ARGON2I13
 SODIUM_EXPORT
 int crypto_pwhash_alg_argon2i13(void);
 

src/libsodium/include/sodium/crypto_pwhash_argon2i.h

@@ -12,6 +12,10 @@
 extern "C" {
 #endif
 
+#define crypto_pwhash_argon2i_ALG_ARGON2I13 1
+SODIUM_EXPORT
+int crypto_pwhash_argon2i_alg_argon2i13(void);
+
 #define crypto_pwhash_argon2i_SALTBYTES 16U
 SODIUM_EXPORT
 size_t crypto_pwhash_argon2i_saltbytes(void);
@@ -55,7 +59,7 @@ int crypto_pwhash_argon2i(unsigned char * const out,
                           unsigned long long passwdlen,
                           const unsigned char * const salt,
                           unsigned long long opslimit,
-                          size_t memlimit)
+                          size_t memlimit, int alg)
             __attribute__ ((warn_unused_result));
 
 SODIUM_EXPORT

test/default/pwhash.c

@@ -353,6 +353,7 @@ int main(void)
            crypto_pwhash_memlimit_moderate());
     assert(crypto_pwhash_argon2i_memlimit_sensitive() ==
            crypto_pwhash_memlimit_sensitive());
+    assert(crypto_pwhash_alg_argon2i13() == crypto_pwhash_argon2i_alg_argon2i13());
     assert(crypto_pwhash_alg_argon2i13() == crypto_pwhash_ALG_ARGON2I13);
     assert(crypto_pwhash_alg_argon2i13() == crypto_pwhash_alg_default());