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[oweals/openssl.git] / crypto / evp / digest.c

diff --git a/crypto/evp/digest.c b/crypto/evp/digest.c
index d6abcfe1d6604a47e9b21a859452075ccbeb5a0d..af0044ff43d7486b1302c56b8e7d4e988d0b09b6 100644 (file)
--- a/crypto/evp/digest.c
+++ b/crypto/evp/digest.c
@@ -117,6 +117,11 @@
 #include <openssl/engine.h>
 #endif
 
+#ifdef OPENSSL_FIPS
+#include <openssl/fips.h>
+#include "evp_locl.h"
+#endif
+
 void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
        {
        memset(ctx,'\0',sizeof *ctx);
@@ -141,6 +146,19 @@ int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
 int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
        {
        EVP_MD_CTX_clear_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
+#ifdef OPENSSL_FIPS
+       /* If FIPS mode switch to approved implementation if possible */
+       if (FIPS_mode())
+               {
+               const EVP_MD *fipsmd;
+               if (type)
+                       {
+                       fipsmd = evp_get_fips_md(type);
+                       if (fipsmd)
+                               type = fipsmd;
+                       }
+               }
+#endif
 #ifndef OPENSSL_NO_ENGINE
        /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
         * so this context may already have an ENGINE! Try to avoid releasing
@@ -175,6 +193,7 @@ int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
                                {
                                /* Same comment from evp_enc.c */
                                EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR);
+                               ENGINE_finish(impl);
                                return 0;
                                }
                        /* We'll use the ENGINE's private digest definition */
@@ -203,6 +222,12 @@ int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
                        {
                        ctx->update = type->update;
                        ctx->md_data=OPENSSL_malloc(type->ctx_size);
+                       if (ctx->md_data == NULL)
+                               {
+                               EVPerr(EVP_F_EVP_DIGESTINIT_EX,
+                                                       ERR_R_MALLOC_FAILURE);
+                               return 0;
+                               }
                        }
                }
 #ifndef OPENSSL_NO_ENGINE
@@ -218,12 +243,26 @@ skip_to_init:
                }
        if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
                return 1;
+#ifdef OPENSSL_FIPS
+       if (FIPS_mode())
+               {
+               if (FIPS_digestinit(ctx, type))
+                       return 1;
+               OPENSSL_free(ctx->md_data);
+               ctx->md_data = NULL;
+               return 0;
+               }
+#endif
        return ctx->digest->init(ctx);
        }
 
 int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
        {
+#ifdef OPENSSL_FIPS
+       return FIPS_digestupdate(ctx, data, count);
+#else
        return ctx->update(ctx,data,count);
+#endif
        }
 
 /* The caller can assume that this removes any secret data from the context */
@@ -238,6 +277,9 @@ int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
 /* The caller can assume that this removes any secret data from the context */
 int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
        {
+#ifdef OPENSSL_FIPS
+       return FIPS_digestfinal(ctx, md, size);
+#else
        int ret;
 
        OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
@@ -251,6 +293,7 @@ int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
                }
        memset(ctx->md_data,0,ctx->digest->ctx_size);
        return ret;
+#endif
        }
 
 int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
@@ -337,13 +380,17 @@ int EVP_Digest(const void *data, size_t count,
 
 void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
        {
-       EVP_MD_CTX_cleanup(ctx);
-       OPENSSL_free(ctx);
+       if (ctx)
+               {
+               EVP_MD_CTX_cleanup(ctx);
+               OPENSSL_free(ctx);
+               }
        }
 
 /* This call frees resources associated with the context */
 int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
        {
+#ifndef OPENSSL_FIPS
        /* Don't assume ctx->md_data was cleaned in EVP_Digest_Final,
         * because sometimes only copies of the context are ever finalised.
         */
@@ -356,6 +403,7 @@ int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
                OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size);
                OPENSSL_free(ctx->md_data);
                }
+#endif
        if (ctx->pctx)
                EVP_PKEY_CTX_free(ctx->pctx);
 #ifndef OPENSSL_NO_ENGINE
@@ -363,6 +411,9 @@ int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
                /* The EVP_MD we used belongs to an ENGINE, release the
                 * functional reference we held for this reason. */
                ENGINE_finish(ctx->engine);
+#endif
+#ifdef OPENSSL_FIPS
+       FIPS_md_ctx_cleanup(ctx);
 #endif
        memset(ctx,'\0',sizeof *ctx);