Add support for setting raw private Poly1305 keys
#include "internal/asn1_int.h"
#include "internal/poly1305.h"
#include "poly1305_local.h"
+#include "internal/evp_int.h"
/*
* POLY1305 "ASN1" method. This is just here to indicate the maximum
@@ -45,6 +46,27 @@ static int poly1305_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 poly1305_set_priv_key(EVP_PKEY *pkey, const unsigned char *priv,
+ size_t len)
+{
+ ASN1_OCTET_STRING *os;
+
+ if (pkey->pkey.ptr != NULL || len != POLY1305_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 poly1305_asn1_meth = {
EVP_PKEY_POLY1305,
EVP_PKEY_POLY1305,
@@ -63,5 +85,17 @@ const EVP_PKEY_ASN1_METHOD poly1305_asn1_meth = {
poly1305_key_free,
poly1305_pkey_ctrl,
- 0, 0
+ NULL,
+ NULL,
+
+ NULL,
+ NULL,
+ NULL,
+
+ NULL,
+ NULL,
+ NULL,
+
+ poly1305_set_priv_key,
+ NULL,
};
