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-rw-r--r--src/include/openssl3.h109
1 files changed, 109 insertions, 0 deletions
diff --git a/src/include/openssl3.h b/src/include/openssl3.h
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+++ b/src/include/openssl3.h
@@ -0,0 +1,109 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+#ifndef FR_OPENSSL3_H
+#define FR_OPENSSL3_H
+/**
+ * $Id$
+ *
+ * @file openssl3.h
+ * @brief Wrappers to shut up OpenSSL3
+ *
+ * @copyright 2021 Network RADIUS SAS (legal@networkradius.com)
+ */
+
+RCSIDH(openssl3_h, "$Id$")
+
+/*
+ * The HMAC APIs are deprecated in OpenSSL3. We don't want to
+ * fill the code with ifdef's, so we define some horrific
+ * wrappers here.
+ *
+ * This file should be included AFTER all OpenSSL header files.
+ */
+#ifdef HAVE_OPENSSL_SSL_H
+#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+#include <string.h>
+#include <openssl/evp.h>
+#include <openssl/core_names.h>
+
+typedef struct {
+ EVP_MAC *mac;
+ EVP_MAC_CTX *ctx;
+} HMAC3_CTX;
+#define HMAC_CTX HMAC3_CTX
+
+#define HMAC_CTX_new HMAC3_CTX_new
+static inline HMAC3_CTX *HMAC3_CTX_new(void)
+{
+ HMAC3_CTX *h = calloc(1, sizeof(*h));
+
+ return h;
+}
+
+#define HMAC_Init_ex(_ctx, _key, _keylen, _md, _engine) HMAC3_Init_ex(_ctx, _key, _keylen, _md, _engine)
+static inline int HMAC3_Init_ex(HMAC3_CTX *ctx, const unsigned char *key, unsigned int keylen, const EVP_MD *md, UNUSED void *engine)
+{
+ OSSL_PARAM params[2], *p = params;
+ char const *name;
+ char *unconst;
+
+ ctx->mac = EVP_MAC_fetch(NULL, "HMAC", NULL);
+ if (!ctx->mac) return 0;
+
+ ctx->ctx = EVP_MAC_CTX_new(ctx->mac);
+ if (!ctx->ctx) return 0;
+
+ name = EVP_MD_get0_name(md);
+ memcpy(&unconst, &name, sizeof(name)); /* const issues */
+
+ p[0] = OSSL_PARAM_construct_utf8_string(OSSL_ALG_PARAM_DIGEST, unconst, 0);
+ p[1] = OSSL_PARAM_construct_end();
+
+ return EVP_MAC_init(ctx->ctx, key, keylen, params);
+}
+
+#define HMAC_Update HMAC3_Update
+static inline int HMAC3_Update(HMAC3_CTX *ctx, const unsigned char *data, unsigned int datalen)
+{
+ return EVP_MAC_update(ctx->ctx, data, datalen);
+}
+
+#define HMAC_Final HMAC3_Final
+static inline int HMAC3_Final(HMAC3_CTX *ctx, unsigned char *out, unsigned int *len)
+{
+ size_t mylen = *len;
+
+ if (!EVP_MAC_final(ctx->ctx, out, &mylen, mylen)) return 0;
+
+ *len = mylen;
+ return 1;
+}
+
+#define HMAC_CTX_free HMAC3_CTX_free
+static inline void HMAC3_CTX_free(HMAC3_CTX *ctx)
+{
+ if (!ctx) return;
+
+ EVP_MAC_free(ctx->mac);
+ EVP_MAC_CTX_free(ctx->ctx);
+ free(ctx);
+}
+
+#define HMAC_CTX_set_flags(_ctx, _flags)
+
+#endif /* OPENSSL_VERSION_NUMBER */
+#endif
+#endif /* FR_OPENSSL3_H */