crypto/evp/digest.c

124 void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
126 	memset(ctx,'\0',sizeof *ctx);
131 	EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
133 	if (ctx)
134 		EVP_MD_CTX_init(ctx);
136 	return ctx;
139 int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
141 	EVP_MD_CTX_init(ctx);
142 	return EVP_DigestInit_ex(ctx, type, NULL);
145 int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
147 	EVP_MD_CTX_clear_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
153 	if (ctx->engine && ctx->digest && (!type ||
154 			(type && (type->type == ctx->digest->type))))
161 		if(ctx->engine)
162 			ENGINE_finish(ctx->engine);
190 			ctx->engine = impl;
193 			ctx->engine = NULL;
196 	if(!ctx->digest)
202 	if (ctx->digest != type)
204 		if (ctx->digest && ctx->digest->ctx_size)
205 			OPENSSL_free(ctx->md_data);
206 		ctx->digest=type;
207 		if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size)
209 			ctx->update = type->update;
210 			ctx->md_data=OPENSSL_malloc(type->ctx_size);
211 			if (ctx->md_data == NULL)
222 	if (ctx->pctx)
225 		r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
226 					EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
230 	if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
235 		if (FIPS_digestinit(ctx, type))
237 		OPENSSL_free(ctx->md_data);
238 		ctx->md_data = NULL;
242 	return ctx->digest->init(ctx);
245 int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
248 	return FIPS_digestupdate(ctx, data, count);
250 	return ctx->update(ctx,data,count);
255 int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
258 	ret = EVP_DigestFinal_ex(ctx, md, size);
259 	EVP_MD_CTX_cleanup(ctx);
264 int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
267 	return FIPS_digestfinal(ctx, md, size);
271 	OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
272 	ret=ctx->digest->final(ctx,md);
274 		*size=ctx->digest->md_size;
275 	if (ctx->digest->cleanup)
277 		ctx->digest->cleanup(ctx);
278 		EVP_MD_CTX_set_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
280 	memset(ctx->md_data,0,ctx->digest->ctx_size);
354 	EVP_MD_CTX ctx;
357 	EVP_MD_CTX_init(&ctx);
358 	EVP_MD_CTX_set_flags(&ctx,EVP_MD_CTX_FLAG_ONESHOT);
359 	ret=EVP_DigestInit_ex(&ctx, type, impl)
360 	  && EVP_DigestUpdate(&ctx, data, count)
361 	  && EVP_DigestFinal_ex(&ctx, md, size);
362 	EVP_MD_CTX_cleanup(&ctx);
367 void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
369 	if (ctx)
371 		EVP_MD_CTX_cleanup(ctx);
372 		OPENSSL_free(ctx);
377 int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
380 	/* Don't assume ctx->md_data was cleaned in EVP_Digest_Final,
383 	if (ctx->digest && ctx->digest->cleanup
384 	    && !EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED))
385 		ctx->digest->cleanup(ctx);
386 	if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
387 	    && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE))
389 		OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size);
390 		OPENSSL_free(ctx->md_data);
393 	if (ctx->pctx)
394 		EVP_PKEY_CTX_free(ctx->pctx);
396 	if(ctx->engine)
399 		ENGINE_finish(ctx->engine);
402 	FIPS_md_ctx_cleanup(ctx);
404 	memset(ctx,'\0',sizeof *ctx);