X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fhmac%2Fhmac.c;h=15a9a21299157db7614ca7f3941dccb2adf36385;hb=3e8f9dc1a07df10dd52544efa269628744a40173;hp=b1aa05b2eaa5b2b2e3a8cbc79f81307286b05f47;hpb=6f86850eec97884090ffa31d4cbc6eb9c9186eea;p=oweals%2Fopenssl.git

diff --git a/crypto/hmac/hmac.c b/crypto/hmac/hmac.c
index b1aa05b2ea..15a9a21299 100644
--- a/crypto/hmac/hmac.c
+++ b/crypto/hmac/hmac.c
@@ -5,21 +5,21 @@
  * This package is an SSL implementation written
  * by Eric Young (eay@cryptsoft.com).
  * The implementation was written so as to conform with Netscapes SSL.
- * 
+ *
  * This library is free for commercial and non-commercial use as long as
  * the following conditions are aheared to.  The following conditions
  * apply to all code found in this distribution, be it the RC4, RSA,
  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  * included with this distribution is covered by the same copyright terms
  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
+ *
  * Copyright remains Eric Young's, and as such any Copyright notices in
  * the code are not to be removed.
  * If this package is used in a product, Eric Young should be given attribution
  * as the author of the parts of the library used.
  * This can be in the form of a textual message at program startup or
  * in documentation (online or textual) provided with the package.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ -34,10 +34,10 @@
  *     Eric Young (eay@cryptsoft.com)"
  *    The word 'cryptographic' can be left out if the rouines from the library
  *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
+ * 4. If you include any Windows specific code (or a derivative thereof) from
  *    the apps directory (application code) you must include an acknowledgement:
  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +49,7 @@
  * 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.
- * 
+ *
  * The licence and distribution terms for any publically available version or
  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  * copied and put under another distribution licence
@@ -58,116 +58,216 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <openssl/hmac.h>
 #include "cryptlib.h"
+#include <openssl/hmac.h>
+
+#ifdef OPENSSL_FIPS
+# include <openssl/fips.h>
+#endif
+
+int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
+                 const EVP_MD *md, ENGINE *impl)
+{
+    int i, j, reset = 0;
+    unsigned char pad[HMAC_MAX_MD_CBLOCK];
+
+#ifdef OPENSSL_FIPS
+    /* If FIPS mode switch to approved implementation if possible */
+    if (FIPS_mode()) {
+        const EVP_MD *fipsmd;
+        if (md) {
+            fipsmd = FIPS_get_digestbynid(EVP_MD_type(md));
+            if (fipsmd)
+                md = fipsmd;
+        }
+    }
+
+    if (FIPS_mode()) {
+        /* If we have an ENGINE need to allow non FIPS */
+        if ((impl || ctx->i_ctx.engine)
+            && !(ctx->i_ctx.flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)) {
+            EVPerr(EVP_F_HMAC_INIT_EX, EVP_R_DISABLED_FOR_FIPS);
+            return 0;
+        }
+        /*
+         * Other algorithm blocking will be done in FIPS_cmac_init, via
+         * FIPS_hmac_init_ex().
+         */
+        if (!impl && !ctx->i_ctx.engine)
+            return FIPS_hmac_init_ex(ctx, key, len, md, NULL);
+    }
+#endif
+
+    if (md != NULL) {
+        reset = 1;
+        ctx->md = md;
+    } else if (ctx->md) {
+        md = ctx->md;
+    } else {
+        return 0;
+    }
 
-void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
-		  const EVP_MD *md, ENGINE *impl)
-	{
-	int i,j,reset=0;
-	unsigned char pad[HMAC_MAX_MD_CBLOCK];
-
-	if (md != NULL)
-		{
-		reset=1;
-		ctx->md=md;
-		}
-	else
-		md=ctx->md;
-
-	if (key != NULL)
-		{
-		reset=1;
-		j=EVP_MD_block_size(md);
-		OPENSSL_assert(j <= (int)sizeof(ctx->key));
-		if (j < len)
-			{
-			EVP_DigestInit_ex(&ctx->md_ctx,md, impl);
-			EVP_DigestUpdate(&ctx->md_ctx,key,len);
-			EVP_DigestFinal_ex(&(ctx->md_ctx),ctx->key,
-				&ctx->key_length);
-			}
-		else
-			{
-			OPENSSL_assert(len>0 && len <= (int)sizeof(ctx->key));
-			memcpy(ctx->key,key,len);
-			ctx->key_length=len;
-			}
-		if(ctx->key_length != HMAC_MAX_MD_CBLOCK)
-			memset(&ctx->key[ctx->key_length], 0,
-				HMAC_MAX_MD_CBLOCK - ctx->key_length);
-		}
-
-	if (reset)	
-		{
-		for (i=0; i<HMAC_MAX_MD_CBLOCK; i++)
-			pad[i]=0x36^ctx->key[i];
-		EVP_DigestInit_ex(&ctx->i_ctx,md, impl);
-		EVP_DigestUpdate(&ctx->i_ctx,pad,EVP_MD_block_size(md));
-
-		for (i=0; i<HMAC_MAX_MD_CBLOCK; i++)
-			pad[i]=0x5c^ctx->key[i];
-		EVP_DigestInit_ex(&ctx->o_ctx,md, impl);
-		EVP_DigestUpdate(&ctx->o_ctx,pad,EVP_MD_block_size(md));
-		}
-	EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->i_ctx);
-	}
-
-void HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
-	       const EVP_MD *md)
-	{
-	if(key && md)
-	    HMAC_CTX_init(ctx);
-	HMAC_Init_ex(ctx,key,len,md, NULL);
-	}
-
-void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len)
-	{
-	EVP_DigestUpdate(&ctx->md_ctx,data,len);
-	}
-
-void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len)
-	{
-	int j;
-	unsigned int i;
-	unsigned char buf[EVP_MAX_MD_SIZE];
-
-	j=EVP_MD_block_size(ctx->md);
-
-	EVP_DigestFinal_ex(&ctx->md_ctx,buf,&i);
-	EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->o_ctx);
-	EVP_DigestUpdate(&ctx->md_ctx,buf,i);
-	EVP_DigestFinal_ex(&ctx->md_ctx,md,len);
-	}
+    if (!ctx->key_init && key == NULL)
+        return 0;
+
+    if (key != NULL) {
+        reset = 1;
+        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))
+                goto err;
+            if (!EVP_DigestUpdate(&ctx->md_ctx, key, len))
+                goto err;
+            if (!EVP_DigestFinal_ex(&(ctx->md_ctx), ctx->key,
+                                    &ctx->key_length))
+                goto err;
+        } else {
+            if (len < 0 || len > (int)sizeof(ctx->key))
+                return 0;
+            memcpy(ctx->key, key, len);
+            ctx->key_length = len;
+        }
+        if (ctx->key_length != HMAC_MAX_MD_CBLOCK)
+            memset(&ctx->key[ctx->key_length], 0,
+                   HMAC_MAX_MD_CBLOCK - ctx->key_length);
+        ctx->key_init = 1;
+    }
+
+    if (reset) {
+        for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
+            pad[i] = 0x36 ^ ctx->key[i];
+        if (!EVP_DigestInit_ex(&ctx->i_ctx, md, impl))
+            goto err;
+        if (!EVP_DigestUpdate(&ctx->i_ctx, pad, EVP_MD_block_size(md)))
+            goto err;
+
+        for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
+            pad[i] = 0x5c ^ ctx->key[i];
+        if (!EVP_DigestInit_ex(&ctx->o_ctx, md, impl))
+            goto err;
+        if (!EVP_DigestUpdate(&ctx->o_ctx, pad, EVP_MD_block_size(md)))
+            goto err;
+    }
+    if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx, &ctx->i_ctx))
+        goto err;
+    return 1;
+ err:
+    return 0;
+}
+
+int HMAC_Init(HMAC_CTX *ctx, const void *key, int len, const EVP_MD *md)
+{
+    if (key && md)
+        HMAC_CTX_init(ctx);
+    return HMAC_Init_ex(ctx, key, len, md, NULL);
+}
+
+int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len)
+{
+#ifdef OPENSSL_FIPS
+    if (FIPS_mode() && !ctx->i_ctx.engine)
+        return FIPS_hmac_update(ctx, data, len);
+#endif
+    if (!ctx->key_init)
+        return 0;
+
+    return EVP_DigestUpdate(&ctx->md_ctx, data, len);
+}
+
+int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len)
+{
+    unsigned int i;
+    unsigned char buf[EVP_MAX_MD_SIZE];
+#ifdef OPENSSL_FIPS
+    if (FIPS_mode() && !ctx->i_ctx.engine)
+        return FIPS_hmac_final(ctx, md, len);
+#endif
+
+    if (!ctx->key_init)
+        goto err;
+
+    if (!EVP_DigestFinal_ex(&ctx->md_ctx, buf, &i))
+        goto err;
+    if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx, &ctx->o_ctx))
+        goto err;
+    if (!EVP_DigestUpdate(&ctx->md_ctx, buf, i))
+        goto err;
+    if (!EVP_DigestFinal_ex(&ctx->md_ctx, md, len))
+        goto err;
+    return 1;
+ err:
+    return 0;
+}
 
 void HMAC_CTX_init(HMAC_CTX *ctx)
-	{
-	EVP_MD_CTX_init(&ctx->i_ctx);
-	EVP_MD_CTX_init(&ctx->o_ctx);
-	EVP_MD_CTX_init(&ctx->md_ctx);
-	}
+{
+    EVP_MD_CTX_init(&ctx->i_ctx);
+    EVP_MD_CTX_init(&ctx->o_ctx);
+    EVP_MD_CTX_init(&ctx->md_ctx);
+    ctx->key_init = 0;
+    ctx->md = NULL;
+}
+
+int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx)
+{
+    if (!EVP_MD_CTX_copy(&dctx->i_ctx, &sctx->i_ctx))
+        goto err;
+    if (!EVP_MD_CTX_copy(&dctx->o_ctx, &sctx->o_ctx))
+        goto err;
+    if (!EVP_MD_CTX_copy(&dctx->md_ctx, &sctx->md_ctx))
+        goto err;
+    dctx->key_init = sctx->key_init;
+    if (sctx->key_init) {
+        memcpy(dctx->key, sctx->key, HMAC_MAX_MD_CBLOCK);
+        dctx->key_length = sctx->key_length;
+    }
+    dctx->md = sctx->md;
+    return 1;
+ err:
+    return 0;
+}
 
 void HMAC_CTX_cleanup(HMAC_CTX *ctx)
-	{
-	EVP_MD_CTX_cleanup(&ctx->i_ctx);
-	EVP_MD_CTX_cleanup(&ctx->o_ctx);
-	EVP_MD_CTX_cleanup(&ctx->md_ctx);
-	memset(ctx,0,sizeof *ctx);
-	}
+{
+#ifdef OPENSSL_FIPS
+    if (FIPS_mode() && !ctx->i_ctx.engine) {
+        FIPS_hmac_ctx_cleanup(ctx);
+        return;
+    }
+#endif
+    EVP_MD_CTX_cleanup(&ctx->i_ctx);
+    EVP_MD_CTX_cleanup(&ctx->o_ctx);
+    EVP_MD_CTX_cleanup(&ctx->md_ctx);
+    memset(ctx, 0, sizeof *ctx);
+}
 
 unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
-		    const unsigned char *d, size_t n, unsigned char *md,
-		    unsigned int *md_len)
-	{
-	HMAC_CTX c;
-	static unsigned char m[EVP_MAX_MD_SIZE];
-
-	if (md == NULL) md=m;
-	HMAC_CTX_init(&c);
-	HMAC_Init(&c,key,key_len,evp_md);
-	HMAC_Update(&c,d,n);
-	HMAC_Final(&c,md,md_len);
-	HMAC_CTX_cleanup(&c);
-	return(md);
-	}
+                    const unsigned char *d, size_t n, unsigned char *md,
+                    unsigned int *md_len)
+{
+    HMAC_CTX c;
+    static unsigned char m[EVP_MAX_MD_SIZE];
+
+    if (md == NULL)
+        md = m;
+    HMAC_CTX_init(&c);
+    if (!HMAC_Init(&c, key, key_len, evp_md))
+        goto err;
+    if (!HMAC_Update(&c, d, n))
+        goto err;
+    if (!HMAC_Final(&c, md, md_len))
+        goto err;
+    HMAC_CTX_cleanup(&c);
+    return md;
+ err:
+    HMAC_CTX_cleanup(&c);
+    return NULL;
+}
 
+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->md_ctx, flags);
+}