X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fdigest.c;h=c7856c6a943ec70305c2aa59810acd41efb3a725;hp=7d8421079b20bc8a2e238d1606a30c0a301b0daa;hb=16f8d4ebf0fd4847fa83d9c61f4150273cb4f533;hpb=9e0aad9fd60635e240f7742fa1497eced6f1cd0b

diff --git a/crypto/evp/digest.c b/crypto/evp/digest.c
index 7d8421079b..c7856c6a94 100644
--- a/crypto/evp/digest.c
+++ b/crypto/evp/digest.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
@@ -63,7 +63,7 @@
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
+ *    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
@@ -114,221 +114,253 @@
 #include <openssl/objects.h>
 #include <openssl/evp.h>
 #ifndef OPENSSL_NO_ENGINE
-#include <openssl/engine.h>
+# include <openssl/engine.h>
 #endif
 
 void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
-	{
-	memset(ctx,'\0',sizeof *ctx);
-	}
+{
+    memset(ctx, 0, sizeof(*ctx));
+}
 
 EVP_MD_CTX *EVP_MD_CTX_create(void)
-	{
-	EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
+{
+    EVP_MD_CTX *ctx = OPENSSL_malloc(sizeof(*ctx));
 
-	EVP_MD_CTX_init(ctx);
+    if (ctx)
+        EVP_MD_CTX_init(ctx);
 
-	return ctx;
-	}
+    return ctx;
+}
 
 int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
-	{
-	EVP_MD_CTX_init(ctx);
-	return EVP_DigestInit_ex(ctx, type, NULL);
-	}
+{
+    EVP_MD_CTX_init(ctx);
+    return EVP_DigestInit_ex(ctx, type, NULL);
+}
 
 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);
+{
+    EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
 #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
-	 * the previous handle, re-querying for an ENGINE, and having a
-	 * reinitialisation, when it may all be unecessary. */
-	if (ctx->engine && ctx->digest && (!type ||
-			(type && (type->type == ctx->digest->type))))
-		goto skip_to_init;
-	if (type)
-		{
-		/* Ensure an ENGINE left lying around from last time is cleared
-		 * (the previous check attempted to avoid this if the same
-		 * ENGINE and EVP_MD could be used). */
-		if(ctx->engine)
-			ENGINE_finish(ctx->engine);
-		if(impl)
-			{
-			if (!ENGINE_init(impl))
-				{
-				EVPerr(EVP_F_EVP_DIGESTINIT, EVP_R_INITIALIZATION_ERROR);
-				return 0;
-				}
-			}
-		else
-			/* Ask if an ENGINE is reserved for this job */
-			impl = ENGINE_get_digest_engine(type->type);
-		if(impl)
-			{
-			/* There's an ENGINE for this job ... (apparently) */
-			const EVP_MD *d = ENGINE_get_digest(impl, type->type);
-			if(!d)
-				{
-				/* Same comment from evp_enc.c */
-				EVPerr(EVP_F_EVP_DIGESTINIT, EVP_R_INITIALIZATION_ERROR);
-				return 0;
-				}
-			/* We'll use the ENGINE's private digest definition */
-			type = d;
-			/* Store the ENGINE functional reference so we know
-			 * 'type' came from an ENGINE and we need to release
-			 * it when done. */
-			ctx->engine = impl;
-			}
-		else
-			ctx->engine = NULL;
-		}
-	else
-	if(!ctx->digest)
-		{
-		EVPerr(EVP_F_EVP_DIGESTINIT, EVP_R_NO_DIGEST_SET);
-		return 0;
-		}
+    /*
+     * 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 the
+     * previous handle, re-querying for an ENGINE, and having a
+     * reinitialisation, when it may all be unecessary.
+     */
+    if (ctx->engine && ctx->digest && (!type ||
+                                       (type
+                                        && (type->type ==
+                                            ctx->digest->type))))
+        goto skip_to_init;
+    if (type) {
+        /*
+         * Ensure an ENGINE left lying around from last time is cleared (the
+         * previous check attempted to avoid this if the same ENGINE and
+         * EVP_MD could be used).
+         */
+        if (ctx->engine)
+            ENGINE_finish(ctx->engine);
+        if (impl) {
+            if (!ENGINE_init(impl)) {
+                EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
+                return 0;
+            }
+        } else
+            /* Ask if an ENGINE is reserved for this job */
+            impl = ENGINE_get_digest_engine(type->type);
+        if (impl) {
+            /* There's an ENGINE for this job ... (apparently) */
+            const EVP_MD *d = ENGINE_get_digest(impl, type->type);
+            if (!d) {
+                /* 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 */
+            type = d;
+            /*
+             * Store the ENGINE functional reference so we know 'type' came
+             * from an ENGINE and we need to release it when done.
+             */
+            ctx->engine = impl;
+        } else
+            ctx->engine = NULL;
+    } else {
+        if (!ctx->digest) {
+            EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET);
+            return 0;
+        }
+        type = ctx->digest;
+    }
 #endif
-	if (ctx->digest != type)
-		{
-		if (ctx->digest && ctx->digest->ctx_size)
-			OPENSSL_free(ctx->md_data);
-		ctx->digest=type;
-		if (type->ctx_size)
-			ctx->md_data=OPENSSL_malloc(type->ctx_size);
-		}
+    if (ctx->digest != type) {
+        if (ctx->digest && ctx->digest->ctx_size)
+            OPENSSL_free(ctx->md_data);
+        ctx->digest = type;
+        if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
+            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
-skip_to_init:
+ skip_to_init:
 #endif
-	return ctx->digest->init(ctx);
-	}
+    if (ctx->pctx) {
+        int r;
+        r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
+                              EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
+        if (r <= 0 && (r != -2))
+            return 0;
+    }
+    if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
+        return 1;
+    return ctx->digest->init(ctx);
+}
 
-int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data,
-	     size_t count)
-	{
-	return ctx->digest->update(ctx,data,count);
-	}
+int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
+{
+    return ctx->update(ctx, data, count);
+}
 
 /* The caller can assume that this removes any secret data from the context */
 int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
-	{
-	int ret;
-	ret = EVP_DigestFinal_ex(ctx, md, size);
-	EVP_MD_CTX_cleanup(ctx);
-	return ret;
-	}
+{
+    int ret;
+    ret = EVP_DigestFinal_ex(ctx, md, size);
+    EVP_MD_CTX_cleanup(ctx);
+    return ret;
+}
 
 /* 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)
-	{
-	int ret;
+{
+    int ret;
 
-	OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
-	ret=ctx->digest->final(ctx,md);
-	if (size != NULL)
-		*size=ctx->digest->md_size;
-	if (ctx->digest->cleanup)
-		{
-		ctx->digest->cleanup(ctx);
-		EVP_MD_CTX_set_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
-		}
-	memset(ctx->md_data,0,ctx->digest->ctx_size);
-	return ret;
-	}
+    OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
+    ret = ctx->digest->final(ctx, md);
+    if (size != NULL)
+        *size = ctx->digest->md_size;
+    if (ctx->digest->cleanup) {
+        ctx->digest->cleanup(ctx);
+        EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
+    }
+    memset(ctx->md_data, 0, ctx->digest->ctx_size);
+    return ret;
+}
 
 int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
-	{
-	EVP_MD_CTX_init(out);
-	return EVP_MD_CTX_copy_ex(out, in);
-	}
+{
+    EVP_MD_CTX_init(out);
+    return EVP_MD_CTX_copy_ex(out, in);
+}
 
 int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
-	{
-	unsigned char *tmp_buf;
-	if ((in == NULL) || (in->digest == NULL))
-		{
-		EVPerr(EVP_F_EVP_MD_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
-		return 0;
-		}
+{
+    unsigned char *tmp_buf;
+    if ((in == NULL) || (in->digest == NULL)) {
+        EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED);
+        return 0;
+    }
 #ifndef OPENSSL_NO_ENGINE
-	/* Make sure it's safe to copy a digest context using an ENGINE */
-	if (in->engine && !ENGINE_init(in->engine))
-		{
-		EVPerr(EVP_F_EVP_MD_CTX_COPY,ERR_R_ENGINE_LIB);
-		return 0;
-		}
+    /* Make sure it's safe to copy a digest context using an ENGINE */
+    if (in->engine && !ENGINE_init(in->engine)) {
+        EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB);
+        return 0;
+    }
 #endif
 
-	if (out->digest == in->digest)
-		{
-		tmp_buf = out->md_data;
-	    	EVP_MD_CTX_set_flags(out,EVP_MD_CTX_FLAG_REUSE);
-		}
-	else tmp_buf = NULL;
-	EVP_MD_CTX_cleanup(out);
-	memcpy(out,in,sizeof *out);
+    if (out->digest == in->digest) {
+        tmp_buf = out->md_data;
+        EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
+    } else
+        tmp_buf = NULL;
+    EVP_MD_CTX_cleanup(out);
+    memcpy(out, in, sizeof(*out));
+
+    if (in->md_data && out->digest->ctx_size) {
+        if (tmp_buf)
+            out->md_data = tmp_buf;
+        else {
+            out->md_data = OPENSSL_malloc(out->digest->ctx_size);
+            if (!out->md_data) {
+                EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE);
+                return 0;
+            }
+        }
+        memcpy(out->md_data, in->md_data, out->digest->ctx_size);
+    }
+
+    out->update = in->update;
+
+    if (in->pctx) {
+        out->pctx = EVP_PKEY_CTX_dup(in->pctx);
+        if (!out->pctx) {
+            EVP_MD_CTX_cleanup(out);
+            return 0;
+        }
+    }
 
-	if (out->digest->ctx_size)
-		{
-		if (tmp_buf) out->md_data = tmp_buf;
-		else out->md_data=OPENSSL_malloc(out->digest->ctx_size);
-		memcpy(out->md_data,in->md_data,out->digest->ctx_size);
-		}
+    if (out->digest->copy)
+        return out->digest->copy(out, in);
 
-	if (out->digest->copy)
-		return out->digest->copy(out,in);
-	
-	return 1;
-	}
+    return 1;
+}
 
 int EVP_Digest(const void *data, size_t count,
-		unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl)
-	{
-	EVP_MD_CTX ctx;
-	int ret;
+               unsigned char *md, unsigned int *size, const EVP_MD *type,
+               ENGINE *impl)
+{
+    EVP_MD_CTX ctx;
+    int ret;
 
-	EVP_MD_CTX_init(&ctx);
-	EVP_MD_CTX_set_flags(&ctx,EVP_MD_CTX_FLAG_ONESHOT);
-	ret=EVP_DigestInit_ex(&ctx, type, impl)
-	  && EVP_DigestUpdate(&ctx, data, count)
-	  && EVP_DigestFinal_ex(&ctx, md, size);
-	EVP_MD_CTX_cleanup(&ctx);
+    EVP_MD_CTX_init(&ctx);
+    EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_ONESHOT);
+    ret = EVP_DigestInit_ex(&ctx, type, impl)
+        && EVP_DigestUpdate(&ctx, data, count)
+        && EVP_DigestFinal_ex(&ctx, md, size);
+    EVP_MD_CTX_cleanup(&ctx);
 
-	return ret;
-	}
+    return ret;
+}
 
 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)
-	{
-	/* Don't assume ctx->md_data was cleaned in EVP_Digest_Final,
-	 * because sometimes only copies of the context are ever finalised.
-	 */
-	if (ctx->digest && ctx->digest->cleanup
-	    && !EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED))
-		ctx->digest->cleanup(ctx);
-	if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
-	    && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE))
-		{
-		OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size);
-		OPENSSL_free(ctx->md_data);
-		}
+{
+    /*
+     * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
+     * sometimes only copies of the context are ever finalised.
+     */
+    if (ctx->digest && ctx->digest->cleanup
+        && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
+        ctx->digest->cleanup(ctx);
+    if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
+        && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
+        OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
+    }
+    EVP_PKEY_CTX_free(ctx->pctx);
 #ifndef OPENSSL_NO_ENGINE
-	if(ctx->engine)
-		/* The EVP_MD we used belongs to an ENGINE, release the
-		 * functional reference we held for this reason. */
-		ENGINE_finish(ctx->engine);
+    if (ctx->engine)
+        /*
+         * The EVP_MD we used belongs to an ENGINE, release the functional
+         * reference we held for this reason.
+         */
+        ENGINE_finish(ctx->engine);
 #endif
-	memset(ctx,'\0',sizeof *ctx);
+    memset(ctx, 0, sizeof(*ctx));
 
-	return 1;
-	}
+    return 1;
+}