#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/kdf.h>
+#include <openssl/core.h>
+#include <openssl/core_names.h>
+#include <openssl/params.h>
#include "internal/numbers.h"
#include "internal/evp_int.h"
+#define MAX_PARAM 20
+
+typedef struct {
+ EVP_KDF_CTX *kctx;
+ /* TODO(3.0): come up with a better way to do this */
+ OSSL_PARAM params[MAX_PARAM];
+ int palloc[MAX_PARAM];
+ uint64_t uint64s[MAX_PARAM];
+ int ints[MAX_PARAM];
+ int pidx;
+} EVP_PKEY_KDF_CTX;
+
+static void pkey_kdf_free_param_data(EVP_PKEY_KDF_CTX *pkctx)
+{
+ int i;
+
+ for (i = 0; i < pkctx->pidx; i++)
+ if (pkctx->palloc[i])
+ OPENSSL_free(pkctx->params[i].data);
+ pkctx->pidx = 0;
+}
+
static int pkey_kdf_init(EVP_PKEY_CTX *ctx)
{
+ EVP_PKEY_KDF_CTX *pkctx;
EVP_KDF_CTX *kctx;
+ const char *kdf_name = OBJ_nid2sn(ctx->pmeth->pkey_id);
+ EVP_KDF *kdf;
- kctx = EVP_KDF_CTX_new_id(ctx->pmeth->pkey_id);
- if (kctx == NULL)
+ pkctx = OPENSSL_zalloc(sizeof(*pkctx));
+ if (pkctx == NULL)
return 0;
- ctx->data = kctx;
+ kdf = EVP_KDF_fetch(NULL, kdf_name, NULL);
+ kctx = EVP_KDF_CTX_new(kdf);
+ EVP_KDF_free(kdf);
+ if (kctx == NULL) {
+ OPENSSL_free(pkctx);
+ return 0;
+ }
+
+ pkctx->kctx = kctx;
+ ctx->data = pkctx;
return 1;
}
static void pkey_kdf_cleanup(EVP_PKEY_CTX *ctx)
{
- EVP_KDF_CTX *kctx = ctx->data;
+ EVP_PKEY_KDF_CTX *pkctx = ctx->data;
- EVP_KDF_CTX_free(kctx);
+ EVP_KDF_CTX_free(pkctx->kctx);
+ pkey_kdf_free_param_data(pkctx);
+ OPENSSL_free(pkctx);
}
static int pkey_kdf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
- EVP_KDF_CTX *kctx = ctx->data;
- uint64_t u64_value;
- int cmd;
- int ret;
+ EVP_PKEY_KDF_CTX *pkctx = ctx->data;
+ enum { T_OCTET_STRING, T_UINT64, T_DIGEST, T_INT } cmd;
+ const char *name, *mdname;
+ OSSL_PARAM *p = pkctx->params + pkctx->pidx;
switch (type) {
case EVP_PKEY_CTRL_PASS:
- cmd = EVP_KDF_CTRL_SET_PASS;
+ cmd = T_OCTET_STRING;
+ name = OSSL_KDF_PARAM_PASSWORD;
break;
case EVP_PKEY_CTRL_HKDF_SALT:
case EVP_PKEY_CTRL_SCRYPT_SALT:
- cmd = EVP_KDF_CTRL_SET_SALT;
+ cmd = T_OCTET_STRING;
+ name = OSSL_KDF_PARAM_SALT;
break;
case EVP_PKEY_CTRL_TLS_MD:
case EVP_PKEY_CTRL_HKDF_MD:
- cmd = EVP_KDF_CTRL_SET_MD;
+ cmd = T_DIGEST;
+ name = OSSL_KDF_PARAM_DIGEST;
break;
case EVP_PKEY_CTRL_TLS_SECRET:
- cmd = EVP_KDF_CTRL_SET_TLS_SECRET;
- ret = EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_RESET_TLS_SEED);
- if (ret < 1)
- return ret;
+ cmd = T_OCTET_STRING;
+ name = OSSL_KDF_PARAM_SECRET;
break;
case EVP_PKEY_CTRL_TLS_SEED:
- cmd = EVP_KDF_CTRL_ADD_TLS_SEED;
+ cmd = T_OCTET_STRING;
+ name = OSSL_KDF_PARAM_SEED;
break;
case EVP_PKEY_CTRL_HKDF_KEY:
- cmd = EVP_KDF_CTRL_SET_KEY;
+ cmd = T_OCTET_STRING;
+ name = OSSL_KDF_PARAM_KEY;
break;
case EVP_PKEY_CTRL_HKDF_INFO:
- cmd = EVP_KDF_CTRL_ADD_HKDF_INFO;
+ cmd = T_OCTET_STRING;
+ name = OSSL_KDF_PARAM_INFO;
break;
case EVP_PKEY_CTRL_HKDF_MODE:
- cmd = EVP_KDF_CTRL_SET_HKDF_MODE;
+ cmd = T_INT;
+ name = OSSL_KDF_PARAM_MODE;
break;
case EVP_PKEY_CTRL_SCRYPT_N:
- cmd = EVP_KDF_CTRL_SET_SCRYPT_N;
+ cmd = T_UINT64;
+ name = OSSL_KDF_PARAM_SCRYPT_N;
break;
case EVP_PKEY_CTRL_SCRYPT_R:
- cmd = EVP_KDF_CTRL_SET_SCRYPT_R;
+ cmd = T_UINT64; /* Range checking occurs on the provider side */
+ name = OSSL_KDF_PARAM_SCRYPT_R;
break;
case EVP_PKEY_CTRL_SCRYPT_P:
- cmd = EVP_KDF_CTRL_SET_SCRYPT_P;
+ cmd = T_UINT64; /* Range checking occurs on the provider side */
+ name = OSSL_KDF_PARAM_SCRYPT_P;
break;
case EVP_PKEY_CTRL_SCRYPT_MAXMEM_BYTES:
- cmd = EVP_KDF_CTRL_SET_MAXMEM_BYTES;
+ cmd = T_UINT64;
+ name = OSSL_KDF_PARAM_SCRYPT_MAXMEM;
break;
default:
return -2;
}
switch (cmd) {
- case EVP_KDF_CTRL_SET_PASS:
- case EVP_KDF_CTRL_SET_SALT:
- case EVP_KDF_CTRL_SET_KEY:
- case EVP_KDF_CTRL_SET_TLS_SECRET:
- case EVP_KDF_CTRL_ADD_TLS_SEED:
- case EVP_KDF_CTRL_ADD_HKDF_INFO:
- return EVP_KDF_ctrl(kctx, cmd, (const unsigned char *)p2, (size_t)p1);
-
- case EVP_KDF_CTRL_SET_MD:
- return EVP_KDF_ctrl(kctx, cmd, (const EVP_MD *)p2);
-
- case EVP_KDF_CTRL_SET_HKDF_MODE:
- return EVP_KDF_ctrl(kctx, cmd, (int)p1);
-
- case EVP_KDF_CTRL_SET_SCRYPT_R:
- case EVP_KDF_CTRL_SET_SCRYPT_P:
- u64_value = *(uint64_t *)p2;
- if (u64_value > UINT32_MAX) {
- EVPerr(EVP_F_PKEY_KDF_CTRL, EVP_R_PARAMETER_TOO_LARGE);
- return 0;
- }
+ case T_OCTET_STRING:
+ *p = OSSL_PARAM_construct_octet_string(name, (unsigned char *)p2,
+ (size_t)p1);
+ break;
- return EVP_KDF_ctrl(kctx, cmd, (uint32_t)u64_value);
+ case T_DIGEST:
+ mdname = EVP_MD_name((const EVP_MD *)p2);
+ *p = OSSL_PARAM_construct_utf8_string(name, (char *)mdname,
+ strlen(mdname) + 1);
+ break;
- case EVP_KDF_CTRL_SET_SCRYPT_N:
- case EVP_KDF_CTRL_SET_MAXMEM_BYTES:
- return EVP_KDF_ctrl(kctx, cmd, *(uint64_t *)p2);
+ /*
+ * These are special because the helper macros pass a pointer to the
+ * stack, so a local copy is required.
+ */
+ case T_INT:
+ pkctx->ints[pkctx->pidx] = *(int *)p2;
+ *p = OSSL_PARAM_construct_int(name, pkctx->ints + pkctx->pidx);
+ break;
- default:
- return 0;
+ case T_UINT64:
+ pkctx->uint64s[pkctx->pidx] = *(uint64_t *)p2;
+ *p = OSSL_PARAM_construct_uint64(name, pkctx->uint64s + pkctx->pidx);
+ break;
}
+ pkctx->palloc[pkctx->pidx++] = 0;
+ return 1;
}
static int pkey_kdf_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
const char *value)
{
- EVP_KDF_CTX *kctx = ctx->data;
+ EVP_PKEY_KDF_CTX *pkctx = ctx->data;
+ EVP_KDF_CTX *kctx = pkctx->kctx;
+ const EVP_KDF *kdf = EVP_KDF_CTX_kdf(kctx);
+ const OSSL_PARAM *defs = EVP_KDF_CTX_settable_params(kdf);
+ OSSL_PARAM *p = pkctx->params + pkctx->pidx;
+ /* Deal with ctrl name aliasing */
if (strcmp(type, "md") == 0)
- return EVP_KDF_ctrl_str(kctx, "digest", value);
- return EVP_KDF_ctrl_str(kctx, type, value);
+ type = OSSL_KDF_PARAM_DIGEST;
+ /* scrypt uses 'N', params uses 'n' */
+ if (strcmp(type, "N") == 0)
+ type = OSSL_KDF_PARAM_SCRYPT_N;
+
+ if (!OSSL_PARAM_allocate_from_text(p, defs, type, value, strlen(value)))
+ return 0;
+ pkctx->palloc[pkctx->pidx++] = 1;
+ return 1;
}
static int pkey_kdf_derive_init(EVP_PKEY_CTX *ctx)
{
- EVP_KDF_CTX *kctx = ctx->data;
+ EVP_PKEY_KDF_CTX *pkctx = ctx->data;
- EVP_KDF_reset(kctx);
+ pkey_kdf_free_param_data(pkctx);
+ EVP_KDF_reset(pkctx->kctx);
return 1;
}
static int pkey_kdf_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
size_t *keylen)
{
- EVP_KDF_CTX *kctx = ctx->data;
+ EVP_PKEY_KDF_CTX *pkctx = ctx->data;
+ EVP_KDF_CTX *kctx = pkctx->kctx;
size_t outlen = EVP_KDF_size(kctx);
+ int r;
+ if (pkctx->pidx > 0) {
+ pkctx->params[pkctx->pidx] = OSSL_PARAM_construct_end();
+ r = EVP_KDF_CTX_set_params(kctx, pkctx->params);
+ pkey_kdf_free_param_data(pkctx);
+ if (!r)
+ return 0;
+ }
if (outlen == 0 || outlen == SIZE_MAX) {
/* Variable-output algorithm */
if (key == NULL)
projects / openssl.git / blobdiff