1 files changed, 223 insertions, 0 deletions
diff --git a/src/crypto/evp/p_hmac.c b/src/crypto/evp/p_hmac.c
new file mode 100644
index 0000000..7d3254a
--- /dev/null
+++ b/src/crypto/evp/p_hmac.c
@@ -0,0 +1,223 @@
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2007.
+ */
+/* ====================================================================
+ * Copyright (c) 2007 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com). */
+
+#include <openssl/evp.h>
+
+#include <string.h>
+
+#include <openssl/asn1.h>
+#include <openssl/err.h>
+#include <openssl/hmac.h>
+#include <openssl/mem.h>
+#include <openssl/obj.h>
+
+#include "internal.h"
+#include "../digest/internal.h"
+
+
+typedef struct {
+  const EVP_MD *md;       /* MD for HMAC use */
+  ASN1_OCTET_STRING ktmp; /* Temp storage for key */
+  HMAC_CTX ctx;
+} HMAC_PKEY_CTX;
+
+static int pkey_hmac_init(EVP_PKEY_CTX *ctx) {
+  HMAC_PKEY_CTX *hctx;
+  hctx = OPENSSL_malloc(sizeof(HMAC_PKEY_CTX));
+  if (!hctx) {
+    return 0;
+  }
+  memset(hctx, 0, sizeof(HMAC_PKEY_CTX));
+  hctx->ktmp.type = V_ASN1_OCTET_STRING;
+  HMAC_CTX_init(&hctx->ctx);
+
+  ctx->data = hctx;
+
+  return 1;
+}
+
+static int pkey_hmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) {
+  HMAC_PKEY_CTX *sctx, *dctx;
+  if (!pkey_hmac_init(dst)) {
+    return 0;
+  }
+  sctx = src->data;
+  dctx = dst->data;
+  dctx->md = sctx->md;
+  HMAC_CTX_init(&dctx->ctx);
+  if (!HMAC_CTX_copy_ex(&dctx->ctx, &sctx->ctx)) {
+    return 0;
+  }
+  if (sctx->ktmp.data) {
+    if (!ASN1_OCTET_STRING_set(&dctx->ktmp, sctx->ktmp.data,
+                               sctx->ktmp.length)) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+static void pkey_hmac_cleanup(EVP_PKEY_CTX *ctx) {
+  HMAC_PKEY_CTX *hctx = ctx->data;
+
+  if (hctx == NULL) {
+    return;
+  }
+
+  HMAC_CTX_cleanup(&hctx->ctx);
+  if (hctx->ktmp.data) {
+    if (hctx->ktmp.length) {
+      OPENSSL_cleanse(hctx->ktmp.data, hctx->ktmp.length);
+    }
+    OPENSSL_free(hctx->ktmp.data);
+    hctx->ktmp.data = NULL;
+  }
+  OPENSSL_free(hctx);
+}
+
+static int pkey_hmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) {
+  ASN1_OCTET_STRING *hkey = NULL;
+  HMAC_PKEY_CTX *hctx = ctx->data;
+
+  if (!hctx->ktmp.data) {
+    return 0;
+  }
+  hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
+  if (!hkey) {
+    return 0;
+  }
+  EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);
+
+  return 1;
+}
+
+static void int_update(EVP_MD_CTX *ctx, const void *data, size_t count) {
+  HMAC_PKEY_CTX *hctx = ctx->pctx->data;
+  HMAC_Update(&hctx->ctx, data, count);
+}
+
+static int hmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx) {
+  /* |mctx| gets repurposed as a hook to call |HMAC_Update|. Suppress the
+   * automatic setting of |mctx->update| and the rest of its initialization. */
+  EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
+  mctx->update = int_update;
+  return 1;
+}
+
+static int hmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
+                        EVP_MD_CTX *mctx) {
+  unsigned int hlen;
+  HMAC_PKEY_CTX *hctx = ctx->data;
+  size_t md_size = EVP_MD_CTX_size(mctx);
+
+  if (!sig) {
+    *siglen = md_size;
+    return 1;
+  } else if (*siglen < md_size) {
+    OPENSSL_PUT_ERROR(EVP, hmac_signctx, EVP_R_BUFFER_TOO_SMALL);
+    return 0;
+  }
+
+  if (!HMAC_Final(&hctx->ctx, sig, &hlen)) {
+    return 0;
+  }
+  *siglen = (size_t)hlen;
+  return 1;
+}
+
+static int pkey_hmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) {
+  HMAC_PKEY_CTX *hctx = ctx->data;
+  ASN1_OCTET_STRING *key;
+
+  switch (type) {
+    case EVP_PKEY_CTRL_SET_MAC_KEY:
+      if ((!p2 && p1 > 0) || (p1 < -1)) {
+        return 0;
+      }
+      if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1)) {
+        return 0;
+      }
+      break;
+
+    case EVP_PKEY_CTRL_MD:
+      hctx->md = p2;
+      break;
+
+    case EVP_PKEY_CTRL_DIGESTINIT:
+      key = (ASN1_OCTET_STRING *)ctx->pkey->pkey.ptr;
+      if (!HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md,
+                        ctx->engine)) {
+        return 0;
+      }
+      break;
+
+    default:
+      OPENSSL_PUT_ERROR(EVP, pkey_hmac_ctrl, EVP_R_COMMAND_NOT_SUPPORTED);
+      return 0;
+  }
+  return 1;
+}
+
+const EVP_PKEY_METHOD hmac_pkey_meth = {
+    EVP_PKEY_HMAC,          0 /* flags */,        pkey_hmac_init,
+    pkey_hmac_copy,         pkey_hmac_cleanup,    0 /* paramgen_init */,
+    0 /* paramgen */,       0 /* keygen_init */,  pkey_hmac_keygen,
+    0 /* sign_init */,      0 /* sign */,         0 /* verify_init */,
+    0 /* verify */,         hmac_signctx_init,    hmac_signctx,
+    0 /* verifyctx_init */, 0 /* verifyctx */,    0 /* encrypt_init */,
+    0 /* encrypt */,        0 /* decrypt_init */, 0 /* decrypt */,
+    0 /* derive_init */,    0 /* derive */,       pkey_hmac_ctrl,
+    0,
+};