OpenCoverage

ecdh_kdf.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/ec/ecdh_kdf.c
Source codeSwitch to Preprocessed file
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1/*-
2 * Copyright 2015-2016 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 <string.h>-
11#include <openssl/ec.h>-
12#include <openssl/evp.h>-
13-
14/* Key derivation function from X9.62/SECG */-
15/* Way more than we will ever need */-
16#define ECDH_KDF_MAX (1 << 30)-
17-
18int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,-
19 const unsigned char *Z, size_t Zlen,-
20 const unsigned char *sinfo, size_t sinfolen,-
21 const EVP_MD *md)-
22{-
23 EVP_MD_CTX *mctx = NULL;-
24 int rv = 0;-
25 unsigned int i;-
26 size_t mdlen;-
27 unsigned char ctr[4];-
28 if (sinfolen > ECDH_KDF_MAX || outlen > ECDH_KDF_MAX
sinfolen > (1 << 30)Description
TRUEnever evaluated
FALSEevaluated 18 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
outlen > (1 << 30)Description
TRUEnever evaluated
FALSEevaluated 18 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
0-18
29 || Zlen > ECDH_KDF_MAX)
Zlen > (1 << 30)Description
TRUEnever evaluated
FALSEevaluated 18 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
0-18
30 return 0;
never executed: return 0;
0
31 mctx = EVP_MD_CTX_new();-
32 if (mctx == NULL)
mctx == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 18 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
0-18
33 return 0;
never executed: return 0;
0
34 mdlen = EVP_MD_size(md);-
35 for (i = 1;; i++) {-
36 unsigned char mtmp[EVP_MAX_MD_SIZE];-
37 if (!EVP_DigestInit_ex(mctx, md, NULL))
!EVP_DigestIni... ((void *)0) )Description
TRUEnever evaluated
FALSEevaluated 26 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
0-26
38 goto err;
never executed: goto err;
0
39 ctr[3] = i & 0xFF;-
40 ctr[2] = (i >> 8) & 0xFF;-
41 ctr[1] = (i >> 16) & 0xFF;-
42 ctr[0] = (i >> 24) & 0xFF;-
43 if (!EVP_DigestUpdate(mctx, Z, Zlen))
!EVP_DigestUpd...mctx, Z, Zlen)Description
TRUEnever evaluated
FALSEevaluated 26 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
0-26
44 goto err;
never executed: goto err;
0
45 if (!EVP_DigestUpdate(mctx, ctr, sizeof(ctr)))
!EVP_DigestUpd..., sizeof(ctr))Description
TRUEnever evaluated
FALSEevaluated 26 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
0-26
46 goto err;
never executed: goto err;
0
47 if (!EVP_DigestUpdate(mctx, sinfo, sinfolen))
!EVP_DigestUpd...nfo, sinfolen)Description
TRUEnever evaluated
FALSEevaluated 26 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
0-26
48 goto err;
never executed: goto err;
0
49 if (outlen >= mdlen) {
outlen >= mdlenDescription
TRUEevaluated 8 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 18 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
8-18
50 if (!EVP_DigestFinal(mctx, out, NULL))
!EVP_DigestFin... ((void *)0) )Description
TRUEnever evaluated
FALSEevaluated 8 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-8
51 goto err;
never executed: goto err;
0
52 outlen -= mdlen;-
53 if (outlen == 0)
outlen == 0Description
TRUEnever evaluated
FALSEevaluated 8 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-8
54 break;
never executed: break;
0
55 out += mdlen;-
56 } else {
executed 8 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
8
57 if (!EVP_DigestFinal(mctx, mtmp, NULL))
!EVP_DigestFin... ((void *)0) )Description
TRUEnever evaluated
FALSEevaluated 18 times by 2 tests
Evaluated by:
  • libcrypto.so.1.1
  • sm2_internal_test
0-18
58 goto err;
never executed: goto err;
0
59 memcpy(out, mtmp, outlen);-
60 OPENSSL_cleanse(mtmp, mdlen);-
61 break;
executed 18 times by 2 tests: break;
Executed by:
  • libcrypto.so.1.1
  • sm2_internal_test
18
62 }-
63 }-
64 rv = 1;-
65 err:
code before this statement executed 18 times by 2 tests: err:
Executed by:
  • libcrypto.so.1.1
  • sm2_internal_test
18
66 EVP_MD_CTX_free(mctx);-
67 return rv;
executed 18 times by 2 tests: return rv;
Executed by:
  • libcrypto.so.1.1
  • sm2_internal_test
18
68}-
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