Add support for setting raw private SIPHASH keys
#include "internal/asn1_int.h"
#include "internal/siphash.h"
#include "siphash_local.h"
+#include "internal/evp_int.h"
/*
* SIPHASH "ASN1" method. This is just here to indicate the maximum
@@ -46,6 +47,27 @@ static int siphash_pkey_public_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
return ASN1_OCTET_STRING_cmp(EVP_PKEY_get0(a), EVP_PKEY_get0(b));
}
+static int siphash_set_priv_key(EVP_PKEY *pkey, const unsigned char *priv,
+ size_t len)
+{
+ ASN1_OCTET_STRING *os;
+
+ if (pkey->pkey.ptr != NULL || len != SIPHASH_KEY_SIZE)
+ return 0;
+
+ os = ASN1_OCTET_STRING_new();
+ if (os == NULL)
+ return 0;
+
+ if (!ASN1_OCTET_STRING_set(os, priv, len)) {
+ ASN1_OCTET_STRING_free(os);
+ return 0;
+ }
+
+ pkey->pkey.ptr = os;
+ return 1;
+}
+
const EVP_PKEY_ASN1_METHOD siphash_asn1_meth = {
EVP_PKEY_SIPHASH,
EVP_PKEY_SIPHASH,
@@ -64,5 +86,17 @@ const EVP_PKEY_ASN1_METHOD siphash_asn1_meth = {
siphash_key_free,
siphash_pkey_ctrl,
- 0, 0
+ NULL,
+ NULL,
+
+ NULL,
+ NULL,
+ NULL,
+
+ NULL,
+ NULL,
+ NULL,
+
+ siphash_set_priv_key,
+ NULL,
};
