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diff --git a/lib/crypto/crypto_scrypt-ref.c b/lib/crypto/crypto_scrypt-ref.c
index 79a6f8f..60ef2aa 100644
--- a/lib/crypto/crypto_scrypt-ref.c
+++ b/lib/crypto/crypto_scrypt-ref.c
@@ -34,7 +34,11 @@
#include <stdlib.h>
#include <string.h>
+#ifdef USE_OPENSSL_PBKDF2
+#include <openssl/evp.h>
+#else
#include "sha256.h"
+#endif
#include "sysendian.h"
#include "crypto_scrypt.h"
@@ -256,7 +260,11 @@ crypto_scrypt(const uint8_t * passwd, size_t passwdlen,
goto err2;
/* 1: (B_0 ... B_{p-1}) <-- PBKDF2(P, S, 1, p * MFLen) */
+#ifdef USE_OPENSSL_PBKDF2
+ PKCS5_PBKDF2_HMAC((const char *)passwd, passwdlen, salt, saltlen, 1, EVP_sha256(), p * 128 * r, B);
+#else
PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, 1, B, p * 128 * r);
+#endif
/* 2: for i = 0 to p - 1 do */
for (i = 0; i < p; i++) {
@@ -265,7 +273,11 @@ crypto_scrypt(const uint8_t * passwd, size_t passwdlen,
}
/* 5: DK <-- PBKDF2(P, B, 1, dkLen) */
+#ifdef USE_OPENSSL_PBKDF2
+ PKCS5_PBKDF2_HMAC((const char *)passwd, passwdlen, B, p * 128 * r, 1, EVP_sha256(), buflen, buf);
+#else
PBKDF2_SHA256(passwd, passwdlen, B, p * 128 * r, 1, buf, buflen);
+#endif
/* Free memory. */
free(V);
diff --git a/lib/crypto/crypto_scrypt-sse.c b/lib/crypto/crypto_scrypt-sse.c
index 875175e..dd18f29 100644
--- a/lib/crypto/crypto_scrypt-sse.c
+++ b/lib/crypto/crypto_scrypt-sse.c
@@ -37,7 +37,11 @@
#include <stdlib.h>
#include <string.h>
+#ifdef USE_OPENSSL_PBKDF2
+#include <openssl/evp.h>
+#else
#include "sha256.h"
+#endif
#include "sysendian.h"
#include "crypto_scrypt.h"
@@ -332,7 +336,11 @@ crypto_scrypt(const uint8_t * passwd, size_t passwdlen,
#endif
/* 1: (B_0 ... B_{p-1}) <-- PBKDF2(P, S, 1, p * MFLen) */
+#ifdef USE_OPENSSL_PBKDF2
+ PKCS5_PBKDF2_HMAC((const char *)passwd, passwdlen, salt, saltlen, 1, EVP_sha256(), p * 128 * r, B);
+#else
PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, 1, B, p * 128 * r);
+#endif
/* 2: for i = 0 to p - 1 do */
for (i = 0; i < p; i++) {
@@ -341,7 +349,11 @@ crypto_scrypt(const uint8_t * passwd, size_t passwdlen,
}
/* 5: DK <-- PBKDF2(P, B, 1, dkLen) */
+#ifdef USE_OPENSSL_PBKDF2
+ PKCS5_PBKDF2_HMAC((const char *)passwd, passwdlen, B, p * 128 * r, 1, EVP_sha256(), buflen, buf);
+#else
PBKDF2_SHA256(passwd, passwdlen, B, p * 128 * r, 1, buf, buflen);
+#endif
/* Free memory. */
#ifdef MAP_ANON
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