/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* 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:
* 1. Redistributions of source code must retain the copyright
* 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 the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* 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
* 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
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* 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
* [including the GNU Public Licence.] */
#include <openssl/digest.h>
#include <assert.h>
#include <string.h>
#include <openssl/asn1.h>
#include <openssl/bytestring.h>
#include <openssl/md4.h>
#include <openssl/md5.h>
#include <openssl/nid.h>
#include <openssl/sha.h>
#include "internal.h"
#include "../internal.h"
#if defined(NDEBUG)
#define CHECK(x) (void) (x)
#else
#define CHECK(x) assert(x)
#endif
static void md4_init(EVP_MD_CTX *ctx) {
CHECK(MD4_Init(ctx->md_data));
}
static void md4_update(EVP_MD_CTX *ctx, const void *data, size_t count) {
CHECK(MD4_Update(ctx->md_data, data, count));
}
static void md4_final(EVP_MD_CTX *ctx, uint8_t *out) {
CHECK(MD4_Final(out, ctx->md_data));
}
static const EVP_MD md4_md = {
NID_md4, MD4_DIGEST_LENGTH, 0 /* flags */, md4_init,
md4_update, md4_final, 64 /* block size */, sizeof(MD4_CTX),
};
const EVP_MD *EVP_md4(void) { return &md4_md; }
static void md5_init(EVP_MD_CTX *ctx) {
CHECK(MD5_Init(ctx->md_data));
}
static void md5_update(EVP_MD_CTX *ctx, const void *data, size_t count) {
CHECK(MD5_Update(ctx->md_data, data, count));
}
static void md5_final(EVP_MD_CTX *ctx, uint8_t *out) {
CHECK(MD5_Final(out, ctx->md_data));
}
static const EVP_MD md5_md = {
NID_md5, MD5_DIGEST_LENGTH, 0 /* flags */, md5_init,
md5_update, md5_final, 64 /* block size */, sizeof(MD5_CTX),
};
const EVP_MD *EVP_md5(void) { return &md5_md; }
static void sha1_init(EVP_MD_CTX *ctx) {
CHECK(SHA1_Init(ctx->md_data));
}
static void sha1_update(EVP_MD_CTX *ctx, const void *data, size_t count) {
CHECK(SHA1_Update(ctx->md_data, data, count));
}
static void sha1_final(EVP_MD_CTX *ctx, uint8_t *md) {
CHECK(SHA1_Final(md, ctx->md_data));
}
static const EVP_MD sha1_md = {
NID_sha1, SHA_DIGEST_LENGTH, 0 /* flags */, sha1_init,
sha1_update, sha1_final, 64 /* block size */, sizeof(SHA_CTX),
};
const EVP_MD *EVP_sha1(void) { return &sha1_md; }
static void sha224_init(EVP_MD_CTX *ctx) {
CHECK(SHA224_Init(ctx->md_data));
}
static void sha224_update(EVP_MD_CTX *ctx, const void *data, size_t count) {
CHECK(SHA224_Update(ctx->md_data, data, count));
}
static void sha224_final(EVP_MD_CTX *ctx, uint8_t *md) {
CHECK(SHA224_Final(md, ctx->md_data));
}
static const EVP_MD sha224_md = {
NID_sha224, SHA224_DIGEST_LENGTH, 0 /* flags */,
sha224_init, sha224_update, sha224_final,
64 /* block size */, sizeof(SHA256_CTX),
};
const EVP_MD *EVP_sha224(void) { return &sha224_md; }
static void sha256_init(EVP_MD_CTX *ctx) {
CHECK(SHA256_Init(ctx->md_data));
}
static void sha256_update(EVP_MD_CTX *ctx, const void *data, size_t count) {
CHECK(SHA256_Update(ctx->md_data, data, count));
}
static void sha256_final(EVP_MD_CTX *ctx, uint8_t *md) {
CHECK(SHA256_Final(md, ctx->md_data));
}
static const EVP_MD sha256_md = {
NID_sha256, SHA256_DIGEST_LENGTH, 0 /* flags */,
sha256_init, sha256_update, sha256_final,
64 /* block size */, sizeof(SHA256_CTX),
};
const EVP_MD *EVP_sha256(void) { return &sha256_md; }
static void sha384_init(EVP_MD_CTX *ctx) {
CHECK(SHA384_Init(ctx->md_data));
}
static void sha384_update(EVP_MD_CTX *ctx, const void *data, size_t count) {
CHECK(SHA384_Update(ctx->md_data, data, count));
}
static void sha384_final(EVP_MD_CTX *ctx, uint8_t *md) {
CHECK(SHA384_Final(md, ctx->md_data));
}
static const EVP_MD sha384_md = {
NID_sha384, SHA384_DIGEST_LENGTH, 0 /* flags */,
sha384_init, sha384_update, sha384_final,
128 /* block size */, sizeof(SHA512_CTX),
};
const EVP_MD *EVP_sha384(void) { return &sha384_md; }
static void sha512_init(EVP_MD_CTX *ctx) {
CHECK(SHA512_Init(ctx->md_data));
}
static void sha512_update(EVP_MD_CTX *ctx, const void *data, size_t count) {
CHECK(SHA512_Update(ctx->md_data, data, count));
}
static void sha512_final(EVP_MD_CTX *ctx, uint8_t *md) {
CHECK(SHA512_Final(md, ctx->md_data));
}
static const EVP_MD sha512_md = {
NID_sha512, SHA512_DIGEST_LENGTH, 0 /* flags */,
sha512_init, sha512_update, sha512_final,
128 /* block size */, sizeof(SHA512_CTX),
};
const EVP_MD *EVP_sha512(void) { return &sha512_md; }
typedef struct {
MD5_CTX md5;
SHA_CTX sha1;
} MD5_SHA1_CTX;
static void md5_sha1_init(EVP_MD_CTX *md_ctx) {
MD5_SHA1_CTX *ctx = md_ctx->md_data;
CHECK(MD5_Init(&ctx->md5) && SHA1_Init(&ctx->sha1));
}
static void md5_sha1_update(EVP_MD_CTX *md_ctx, const void *data,
size_t count) {
MD5_SHA1_CTX *ctx = md_ctx->md_data;
CHECK(MD5_Update(&ctx->md5, data, count) &&
SHA1_Update(&ctx->sha1, data, count));
}
static void md5_sha1_final(EVP_MD_CTX *md_ctx, uint8_t *out) {
MD5_SHA1_CTX *ctx = md_ctx->md_data;
CHECK(MD5_Final(out, &ctx->md5) &&
SHA1_Final(out + MD5_DIGEST_LENGTH, &ctx->sha1));
}
static const EVP_MD md5_sha1_md = {
NID_md5_sha1,
MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
0 /* flags */,
md5_sha1_init,
md5_sha1_update,
md5_sha1_final,
64 /* block size */,
sizeof(MD5_SHA1_CTX),
};
const EVP_MD *EVP_md5_sha1(void) { return &md5_sha1_md; }
struct nid_to_digest {
int nid;
const EVP_MD* (*md_func)(void);
const char *short_name;
const char *long_name;
};
static const struct nid_to_digest nid_to_digest_mapping[] = {
{NID_md4, EVP_md4, SN_md4, LN_md4},
{NID_md5, EVP_md5, SN_md5, LN_md5},
{NID_sha1, EVP_sha1, SN_sha1, LN_sha1},
{NID_sha224, EVP_sha224, SN_sha224, LN_sha224},
{NID_sha256, EVP_sha256, SN_sha256, LN_sha256},
{NID_sha384, EVP_sha384, SN_sha384, LN_sha384},
{NID_sha512, EVP_sha512, SN_sha512, LN_sha512},
{NID_md5_sha1, EVP_md5_sha1, SN_md5_sha1, LN_md5_sha1},
/* As a remnant of signing |EVP_MD|s, OpenSSL returned the corresponding
* hash function when given a signature OID. To avoid unintended lax parsing
* of hash OIDs, this is no longer supported for lookup by OID or NID.
* Node.js, however, exposes |EVP_get_digestbyname|'s full behavior to
* consumers so we retain it there. */
{NID_undef, EVP_sha1, SN_dsaWithSHA, LN_dsaWithSHA},
{NID_undef, EVP_sha1, SN_dsaWithSHA1, LN_dsaWithSHA1},
{NID_undef, EVP_sha1, SN_ecdsa_with_SHA1, NULL},
{NID_undef, EVP_md5, SN_md5WithRSAEncryption, LN_md5WithRSAEncryption},
{NID_undef, EVP_sha1, SN_sha1WithRSAEncryption, LN_sha1WithRSAEncryption},
{NID_undef, EVP_sha224, SN_sha224WithRSAEncryption,
LN_sha224WithRSAEncryption},
{NID_undef, EVP_sha256, SN_sha256WithRSAEncryption,
LN_sha256WithRSAEncryption},
{NID_undef, EVP_sha384, SN_sha384WithRSAEncryption,
LN_sha384WithRSAEncryption},
{NID_undef, EVP_sha512, SN_sha512WithRSAEncryption,
LN_sha512WithRSAEncryption},
};
const EVP_MD* EVP_get_digestbynid(int nid) {
if (nid == NID_undef) {
/* Skip the |NID_undef| entries in |nid_to_digest_mapping|. */
return NULL;
}
for (unsigned i = 0; i < OPENSSL_ARRAY_SIZE(nid_to_digest_mapping); i++) {
if (nid_to_digest_mapping[i].nid == nid) {
return nid_to_digest_mapping[i].md_func();
}
}
return NULL;
}
static const struct {
uint8_t oid[9];
uint8_t oid_len;
const EVP_MD *(*md_func) (void);
} kMDOIDs[] = {
/* 1.2.840.113549.2.4 */
{ {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x04}, 8, EVP_md4 },
/* 1.2.840.113549.2.5 */
{ {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05}, 8, EVP_md5 },
/* 1.3.14.3.2.26 */
{ {0x2b, 0x0e, 0x03, 0x02, 0x1a}, 5, EVP_sha1 },
/* 2.16.840.1.101.3.4.2.1 */
{ {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01}, 9, EVP_sha256 },
/* 2.16.840.1.101.3.4.2.2 */
{ {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02}, 9, EVP_sha384 },
/* 2.16.840.1.101.3.4.2.3 */
{ {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03}, 9, EVP_sha512 },
/* 2.16.840.1.101.3.4.2.4 */
{ {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04}, 9, EVP_sha224 },
};
static const EVP_MD *cbs_to_md(const CBS *cbs) {
for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kMDOIDs); i++) {
if (CBS_len(cbs) == kMDOIDs[i].oid_len &&
OPENSSL_memcmp(CBS_data(cbs), kMDOIDs[i].oid, kMDOIDs[i].oid_len) ==
0) {
return kMDOIDs[i].md_func();
}
}
return NULL;
}
const EVP_MD *EVP_get_digestbyobj(const ASN1_OBJECT *obj) {
/* Handle objects with no corresponding OID. */
if (obj->nid != NID_undef) {
return EVP_get_digestbynid(obj->nid);
}
CBS cbs;
CBS_init(&cbs, obj->data, obj->length);
return cbs_to_md(&cbs);
}
const EVP_MD *EVP_parse_digest_algorithm(CBS *cbs) {
CBS algorithm, oid;
if (!CBS_get_asn1(cbs, &algorithm, CBS_ASN1_SEQUENCE) ||
!CBS_get_asn1(&algorithm, &oid, CBS_ASN1_OBJECT)) {
OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_DECODE_ERROR);
return NULL;
}
const EVP_MD *ret = cbs_to_md(&oid);
if (ret == NULL) {
OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_UNKNOWN_HASH);
return NULL;
}
/* The parameters, if present, must be NULL. Historically, whether the NULL
* was included or omitted was not well-specified. When parsing an
* AlgorithmIdentifier, we allow both. (Note this code is not used when
* verifying RSASSA-PKCS1-v1_5 signatures.) */
if (CBS_len(&algorithm) > 0) {
CBS param;
if (!CBS_get_asn1(&algorithm, ¶m, CBS_ASN1_NULL) ||
CBS_len(¶m) != 0 ||
CBS_len(&algorithm) != 0) {
OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_DECODE_ERROR);
return NULL;
}
}
return ret;
}
const EVP_MD *EVP_get_digestbyname(const char *name) {
for (unsigned i = 0; i < OPENSSL_ARRAY_SIZE(nid_to_digest_mapping); i++) {
const char *short_name = nid_to_digest_mapping[i].short_name;
const char *long_name = nid_to_digest_mapping[i].long_name;
if ((short_name && strcmp(short_name, name) == 0) ||
(long_name && strcmp(long_name, name) == 0)) {
return nid_to_digest_mapping[i].md_func();
}
}
return NULL;
}