static int pkey_hkdf_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
const char *value)
{
+ if (strcmp(type, "mode") == 0) {
+ int mode;
+
+ if (strcmp(value, "EXTRACT_AND_EXPAND") == 0)
+ mode = EVP_PKEY_HKDEF_MODE_EXTRACT_AND_EXPAND;
+ else if (strcmp(value, "EXTRACT_ONLY") == 0)
+ mode = EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY;
+ else if (strcmp(value, "EXPAND_ONLY") == 0)
+ mode = EVP_PKEY_HKDEF_MODE_EXPAND_ONLY;
+ else
+ return 0;
+
+ return EVP_PKEY_CTX_hkdf_mode(ctx, mode);
+ }
+
if (strcmp(type, "md") == 0)
return EVP_PKEY_CTX_set_hkdf_md(ctx, EVP_get_digestbyname(value));