/src/irssi/subprojects/openssl-1.1.1l/crypto/evp/digest.c

Source
/*
 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/engine.h>
#include "crypto/evp.h"
#include "evp_local.h"

/* This call frees resources associated with the context */
int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
{
    if (ctx == NULL)
        return 1;

    /*
     * 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);
    }
    /*
     * pctx should be freed by the user of EVP_MD_CTX
     * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set
     */
    if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
        EVP_PKEY_CTX_free(ctx->pctx);
#ifndef OPENSSL_NO_ENGINE
    ENGINE_finish(ctx->engine);
#endif
    OPENSSL_cleanse(ctx, sizeof(*ctx));

    return 1;
}

EVP_MD_CTX *EVP_MD_CTX_new(void)
{
    return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
}

void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
{
    EVP_MD_CTX_reset(ctx);
    OPENSSL_free(ctx);
}

int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
{
    EVP_MD_CTX_reset(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);
#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 unnecessary.
     */
    if (ctx->engine && ctx->digest &&
        (type == NULL || (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).
         */
        ENGINE_finish(ctx->engine);
        if (impl != NULL) {
            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 != NULL) {
            /* There's an ENGINE for this job ... (apparently) */
            const EVP_MD *d = ENGINE_get_digest(impl, type->type);

            if (d == NULL) {
                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_clear_free(ctx->md_data, ctx->digest->ctx_size);
            ctx->md_data = NULL;
        }
        ctx->digest = type;
        if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
            ctx->update = type->update;
            ctx->md_data = OPENSSL_zalloc(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:
#endif
    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)
{
    if (count == 0)
        return 1;

    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_reset(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;

    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);
    }
    OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
    return ret;
}

int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size)
{
    int ret = 0;

    if (ctx->digest->flags & EVP_MD_FLAG_XOF
        && size <= INT_MAX
        && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) {
        ret = ctx->digest->final(ctx, md);

        if (ctx->digest->cleanup != NULL) {
            ctx->digest->cleanup(ctx);
            EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
        }
        OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
    } else {
        EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
    }

    return ret;
}

int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
{
    EVP_MD_CTX_reset(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_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_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_reset(out);
    memcpy(out, in, sizeof(*out));

    /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
    EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);

    /* Null these variables, since they are getting fixed up
     * properly below.  Anything else may cause a memleak and/or
     * double free if any of the memory allocations below fail
     */
    out->md_data = NULL;
    out->pctx = NULL;

    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 == NULL) {
                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_reset(out);
            return 0;
        }
    }

    if (out->digest->copy)
        return out->digest->copy(out, in);

    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 = EVP_MD_CTX_new();
    int ret;

    if (ctx == NULL)
        return 0;
    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_free(ctx);

    return ret;
}

int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
{
    if (ctx->digest && ctx->digest->md_ctrl) {
        int ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
        if (ret <= 0)
            return 0;
        return 1;
    }
    return 0;
}

Coverage Report

Created: 2026-02-14 07:19

Line	Count	Source
1		/*
2		* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the OpenSSL license (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		#include <stdio.h>
11		#include "internal/cryptlib.h"
12		#include <openssl/objects.h>
13		#include <openssl/evp.h>
14		#include <openssl/engine.h>
15		#include "crypto/evp.h"
16		#include "evp_local.h"
17
18		/* This call frees resources associated with the context */
19		int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
20	475k	{
21	475k	if (ctx == NULL)
22	475k	return 1;
23
24		/*
25		* Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
26		* sometimes only copies of the context are ever finalised.
27		*/
28	0	if (ctx->digest && ctx->digest->cleanup
29	0	&& !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
30	0	ctx->digest->cleanup(ctx);
31	0	if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
32	0	&& !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
33	0	OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
34	0	}
35		/*
36		* pctx should be freed by the user of EVP_MD_CTX
37		* if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set
38		*/
39	0	if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
40	0	EVP_PKEY_CTX_free(ctx->pctx);
41	0	#ifndef OPENSSL_NO_ENGINE
42	0	ENGINE_finish(ctx->engine);
43	0	#endif
44	0	OPENSSL_cleanse(ctx, sizeof(*ctx));
45
46	0	return 1;
47	475k	}
48
49		EVP_MD_CTX *EVP_MD_CTX_new(void)
50	0	{
51	0	return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
52	0	}
53
54		void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
55	475k	{
56	475k	EVP_MD_CTX_reset(ctx);
57	475k	OPENSSL_free(ctx);
58	475k	}
59
60		int EVP_DigestInit(EVP_MD_CTX ctx, const EVP_MD type)
61	0	{
62	0	EVP_MD_CTX_reset(ctx);
63	0	return EVP_DigestInit_ex(ctx, type, NULL);
64	0	}
65
66		int EVP_DigestInit_ex(EVP_MD_CTX ctx, const EVP_MD type, ENGINE *impl)
67	0	{
68	0	EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
69	0	#ifndef OPENSSL_NO_ENGINE
70		/*
71		* Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
72		* this context may already have an ENGINE! Try to avoid releasing the
73		* previous handle, re-querying for an ENGINE, and having a
74		* reinitialisation, when it may all be unnecessary.
75		*/
76	0	if (ctx->engine && ctx->digest &&
77	0	(type == NULL \|\| (type->type == ctx->digest->type)))
78	0	goto skip_to_init;
79	0	if (type) {
80		/*
81		* Ensure an ENGINE left lying around from last time is cleared (the
82		* previous check attempted to avoid this if the same ENGINE and
83		* EVP_MD could be used).
84		*/
85	0	ENGINE_finish(ctx->engine);
86	0	if (impl != NULL) {
87	0	if (!ENGINE_init(impl)) {
88	0	EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
89	0	return 0;
90	0	}
91	0	} else {
92		/* Ask if an ENGINE is reserved for this job */
93	0	impl = ENGINE_get_digest_engine(type->type);
94	0	}
95	0	if (impl != NULL) {
96		/* There's an ENGINE for this job ... (apparently) */
97	0	const EVP_MD *d = ENGINE_get_digest(impl, type->type);
98
99	0	if (d == NULL) {
100	0	EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
101	0	ENGINE_finish(impl);
102	0	return 0;
103	0	}
104		/* We'll use the ENGINE's private digest definition */
105	0	type = d;
106		/*
107		* Store the ENGINE functional reference so we know 'type' came
108		* from an ENGINE and we need to release it when done.
109		*/
110	0	ctx->engine = impl;
111	0	} else
112	0	ctx->engine = NULL;
113	0	} else {
114	0	if (!ctx->digest) {
115	0	EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET);
116	0	return 0;
117	0	}
118	0	type = ctx->digest;
119	0	}
120	0	#endif
121	0	if (ctx->digest != type) {
122	0	if (ctx->digest && ctx->digest->ctx_size) {
123	0	OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
124	0	ctx->md_data = NULL;
125	0	}
126	0	ctx->digest = type;
127	0	if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
128	0	ctx->update = type->update;
129	0	ctx->md_data = OPENSSL_zalloc(type->ctx_size);
130	0	if (ctx->md_data == NULL) {
131	0	EVPerr(EVP_F_EVP_DIGESTINIT_EX, ERR_R_MALLOC_FAILURE);
132	0	return 0;
133	0	}
134	0	}
135	0	}
136	0	#ifndef OPENSSL_NO_ENGINE
137	0	skip_to_init:
138	0	#endif
139	0	if (ctx->pctx) {
140	0	int r;
141	0	r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
142	0	EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
143	0	if (r <= 0 && (r != -2))
144	0	return 0;
145	0	}
146	0	if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
147	0	return 1;
148	0	return ctx->digest->init(ctx);
149	0	}
150
151		int EVP_DigestUpdate(EVP_MD_CTX ctx, const void data, size_t count)
152	0	{
153	0	if (count == 0)
154	0	return 1;
155
156	0	return ctx->update(ctx, data, count);
157	0	}
158
159		/* The caller can assume that this removes any secret data from the context */
160		int EVP_DigestFinal(EVP_MD_CTX ctx, unsigned char md, unsigned int *size)
161	0	{
162	0	int ret;
163	0	ret = EVP_DigestFinal_ex(ctx, md, size);
164	0	EVP_MD_CTX_reset(ctx);
165	0	return ret;
166	0	}
167
168		/* The caller can assume that this removes any secret data from the context */
169		int EVP_DigestFinal_ex(EVP_MD_CTX ctx, unsigned char md, unsigned int *size)
170	0	{
171	0	int ret;
172
173	0	OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
174	0	ret = ctx->digest->final(ctx, md);
175	0	if (size != NULL)
176	0	*size = ctx->digest->md_size;
177	0	if (ctx->digest->cleanup) {
178	0	ctx->digest->cleanup(ctx);
179	0	EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
180	0	}
181	0	OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
182	0	return ret;
183	0	}
184
185		int EVP_DigestFinalXOF(EVP_MD_CTX ctx, unsigned char md, size_t size)
186	0	{
187	0	int ret = 0;
188
189	0	if (ctx->digest->flags & EVP_MD_FLAG_XOF
190	0	&& size <= INT_MAX
191	0	&& ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) {
192	0	ret = ctx->digest->final(ctx, md);
193
194	0	if (ctx->digest->cleanup != NULL) {
195	0	ctx->digest->cleanup(ctx);
196	0	EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
197	0	}
198	0	OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
199	0	} else {
200	0	EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
201	0	}
202
203	0	return ret;
204	0	}
205
206		int EVP_MD_CTX_copy(EVP_MD_CTX out, const EVP_MD_CTX in)
207	0	{
208	0	EVP_MD_CTX_reset(out);
209	0	return EVP_MD_CTX_copy_ex(out, in);
210	0	}
211
212		int EVP_MD_CTX_copy_ex(EVP_MD_CTX out, const EVP_MD_CTX in)
213	0	{
214	0	unsigned char *tmp_buf;
215	0	if ((in == NULL) \|\| (in->digest == NULL)) {
216	0	EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED);
217	0	return 0;
218	0	}
219	0	#ifndef OPENSSL_NO_ENGINE
220		/* Make sure it's safe to copy a digest context using an ENGINE */
221	0	if (in->engine && !ENGINE_init(in->engine)) {
222	0	EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB);
223	0	return 0;
224	0	}
225	0	#endif
226
227	0	if (out->digest == in->digest) {
228	0	tmp_buf = out->md_data;
229	0	EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
230	0	} else
231	0	tmp_buf = NULL;
232	0	EVP_MD_CTX_reset(out);
233	0	memcpy(out, in, sizeof(*out));
234
235		/* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
236	0	EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
237
238		/* Null these variables, since they are getting fixed up
239		* properly below. Anything else may cause a memleak and/or
240		* double free if any of the memory allocations below fail
241		*/
242	0	out->md_data = NULL;
243	0	out->pctx = NULL;
244
245	0	if (in->md_data && out->digest->ctx_size) {
246	0	if (tmp_buf)
247	0	out->md_data = tmp_buf;
248	0	else {
249	0	out->md_data = OPENSSL_malloc(out->digest->ctx_size);
250	0	if (out->md_data == NULL) {
251	0	EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE);
252	0	return 0;
253	0	}
254	0	}
255	0	memcpy(out->md_data, in->md_data, out->digest->ctx_size);
256	0	}
257
258	0	out->update = in->update;
259
260	0	if (in->pctx) {
261	0	out->pctx = EVP_PKEY_CTX_dup(in->pctx);
262	0	if (!out->pctx) {
263	0	EVP_MD_CTX_reset(out);
264	0	return 0;
265	0	}
266	0	}
267
268	0	if (out->digest->copy)
269	0	return out->digest->copy(out, in);
270
271	0	return 1;
272	0	}
273
274		int EVP_Digest(const void *data, size_t count,
275		unsigned char md, unsigned int size, const EVP_MD *type,
276		ENGINE *impl)
277	0	{
278	0	EVP_MD_CTX *ctx = EVP_MD_CTX_new();
279	0	int ret;
280
281	0	if (ctx == NULL)
282	0	return 0;
283	0	EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT);
284	0	ret = EVP_DigestInit_ex(ctx, type, impl)
285	0	&& EVP_DigestUpdate(ctx, data, count)
286	0	&& EVP_DigestFinal_ex(ctx, md, size);
287	0	EVP_MD_CTX_free(ctx);
288
289	0	return ret;
290	0	}
291
292		int EVP_MD_CTX_ctrl(EVP_MD_CTX ctx, int cmd, int p1, void p2)
293	0	{
294	0	if (ctx->digest && ctx->digest->md_ctrl) {
295	0	int ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
296	0	if (ret <= 0)
297	0	return 0;
298	0	return 1;
299	0	}
300	0	return 0;
301	0	}