1 files changed, 88 insertions, 0 deletions
diff --git a/main/openssl/0009-crypto-hmac-support-EVP_MD_CTX_FLAG_ONESHOT-and-set-.patch b/main/openssl/0009-crypto-hmac-support-EVP_MD_CTX_FLAG_ONESHOT-and-set-.patch
new file mode 100644
index 0000000000..ef46faa848
--- /dev/null
+++ b/main/openssl/0009-crypto-hmac-support-EVP_MD_CTX_FLAG_ONESHOT-and-set-.patch
@@ -0,0 +1,88 @@
+From 83c96cbc76604daccbc31cea9411555aea96fd6d Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Timo=20Ter=C3=A4s?= <timo.teras@iki.fi>
+Date: Thu, 5 Feb 2015 09:16:51 +0200
+Subject: [PATCH] crypto/hmac: support EVP_MD_CTX_FLAG_ONESHOT and set it
+ properly
+
+Some engines (namely VIA C7 Padlock) work only if EVP_MD_CTX_FLAG_ONESHOT
+is set before final update. This is because some crypto accelerators cannot
+perform non-finalizing transform of the digest.
+
+The usage of EVP_MD_CTX_FLAG_ONESHOT is used semantically slightly
+differently here. It is set before the final EVP_DigestUpdate call, not
+necessarily before EVP_DigestInit call. This will not cause any problems
+though.
+---
+ crypto/hmac/hmac.c | 14 ++++++++++----
+ 1 file changed, 10 insertions(+), 4 deletions(-)
+
+diff --git a/crypto/hmac/hmac.c b/crypto/hmac/hmac.c
+index 1fc9e2c..6f16578 100644
+--- a/crypto/hmac/hmac.c
++++ b/crypto/hmac/hmac.c
+@@ -109,7 +109,8 @@ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
+         j = EVP_MD_block_size(md);
+         OPENSSL_assert(j <= (int)sizeof(ctx->key));
+         if (j < len) {
+-            if (!EVP_DigestInit_ex(&ctx->md_ctx, md, impl))
++           EVP_MD_CTX_set_flags(&ctx->md_ctx, EVP_MD_CTX_FLAG_ONESHOT);
++           if (!EVP_DigestInit_ex(&ctx->md_ctx, md, impl))
+                 goto err;
+             if (!EVP_DigestUpdate(&ctx->md_ctx, key, len))
+                 goto err;
+@@ -129,6 +130,7 @@ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
+     if (reset) {
+         for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
+             pad[i] = 0x36 ^ ctx->key[i];
++        EVP_MD_CTX_clear_flags(&ctx->i_ctx, EVP_MD_CTX_FLAG_ONESHOT);
+         if (!EVP_DigestInit_ex(&ctx->i_ctx, md, impl))
+             goto err;
+         if (!EVP_DigestUpdate(&ctx->i_ctx, pad, EVP_MD_block_size(md)))
+@@ -136,6 +138,7 @@ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
+ 
+         for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
+             pad[i] = 0x5c ^ ctx->key[i];
++        EVP_MD_CTX_clear_flags(&ctx->o_ctx, EVP_MD_CTX_FLAG_ONESHOT);
+         if (!EVP_DigestInit_ex(&ctx->o_ctx, md, impl))
+             goto err;
+         if (!EVP_DigestUpdate(&ctx->o_ctx, pad, EVP_MD_block_size(md)))
+@@ -143,6 +146,7 @@ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
+     }
+     if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx, &ctx->i_ctx))
+         goto err;
++    EVP_MD_CTX_clear_flags(&ctx->md_ctx, EVP_MD_CTX_FLAG_ONESHOT);
+     return 1;
+  err:
+     return 0;
+@@ -177,6 +181,7 @@ int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len)
+         goto err;
+     if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx, &ctx->o_ctx))
+         goto err;
++    EVP_MD_CTX_set_flags(&ctx->md_ctx,EVP_MD_CTX_FLAG_ONESHOT);
+     if (!EVP_DigestUpdate(&ctx->md_ctx, buf, i))
+         goto err;
+     if (!EVP_DigestFinal_ex(&ctx->md_ctx, md, len))
+@@ -233,8 +238,9 @@ unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
+     if (md == NULL)
+         md = m;
+     HMAC_CTX_init(&c);
+-    if (!HMAC_Init(&c, key, key_len, evp_md))
++    if (!HMAC_Init_ex(&c, key, key_len, evp_md, NULL))
+         goto err;
++    HMAC_CTX_set_flags(&c,EVP_MD_CTX_FLAG_ONESHOT);
+     if (!HMAC_Update(&c, d, n))
+         goto err;
+     if (!HMAC_Final(&c, md, md_len))
+@@ -247,7 +253,7 @@ unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
+ 
+ void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags)
+ {
+-    EVP_MD_CTX_set_flags(&ctx->i_ctx, flags);
+-    EVP_MD_CTX_set_flags(&ctx->o_ctx, flags);
++    EVP_MD_CTX_set_flags(&ctx->i_ctx, flags & ~EVP_MD_CTX_FLAG_ONESHOT);
++    EVP_MD_CTX_set_flags(&ctx->o_ctx, flags & ~EVP_MD_CTX_FLAG_ONESHOT);
+     EVP_MD_CTX_set_flags(&ctx->md_ctx, flags);
+ }
+-- 
+2.2.2
+