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add validation of hmac

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This commit is contained in:
Love Hornquist Astrand
2010-09-08 00:06:40 -07:00
parent 51e6e505f1
commit 17d64b8507
1 changed files with 29 additions and 0 deletions
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29
lib/hcrypto/validate.c
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@@ -42,6 +42,7 @@
#include <roken.h> #include <roken.h>
#include <evp.h> #include <evp.h>
#include <hmac.h>
#include <err.h> #include <err.h>
struct tests { struct tests {
@@ -263,6 +264,32 @@ test_cipher(struct tests *t)
return 0; return 0;
} }
static void
check_hmac(void)
{
unsigned char buf[4] = { 0, 0, 0, 0 };
char hmackey[] = "hello-world";
size_t hmackey_size = sizeof(hmackey);
unsigned int hmaclen;
unsigned char hmac[EVP_MAX_MD_SIZE];
HMAC_CTX c;
char answer[20] = "\x2c\xfa\x32\xb7\x2b\x8a\xf6\xdf\xcf\xda"
"\x6f\xd1\x52\x4d\x54\x58\x73\x0f\xf3\x24";
HMAC_CTX_init(&c);
HMAC_Init_ex(&c, hmackey, hmackey_size, EVP_sha1(), NULL);
HMAC_Update(&c, buf, sizeof(buf));
HMAC_Final(&c, hmac, &hmaclen);
HMAC_CTX_cleanup(&c);
if (hmaclen != 20)
errx(1, "hmaclen = %d\n", (int)hmaclen);
if (ct_memcmp(hmac, answer, hmaclen) != 0)
errx(1, "wrong answer\n");
}
void void
hcrypto_validate(void) hcrypto_validate(void)
{ {
@@ -276,4 +303,6 @@ hcrypto_validate(void)
for (i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) for (i = 0; i < sizeof(tests) / sizeof(tests[0]); i++)
test_cipher(&tests[i]); test_cipher(&tests[i]);
check_hmac();
} }