/*
* Verify signature - finalize SHA256 operation and reapply SHA256, then
* compare to the supplied digest.
*/
isc_boolean_t
isc_hmacsha256_verify(isc_hmacsha256_t *ctx, unsigned char *digest, size_t len) {
unsigned char newdigest[ISC_SHA256_DIGESTLENGTH];
REQUIRE(len <= ISC_SHA256_DIGESTLENGTH);
isc_hmacsha256_sign(ctx, newdigest, ISC_SHA256_DIGESTLENGTH);
return (ISC_TF(memcmp(digest, newdigest, len) == 0));
}
static isc_result_t
sign(unsigned char *data, unsigned int length, unsigned char *hmac,
isc_uint32_t algorithm, isccc_region_t *secret)
{
union {
isc_hmacmd5_t hmd5;
isc_hmacsha1_t hsha;
isc_hmacsha224_t h224;
isc_hmacsha256_t h256;
isc_hmacsha384_t h384;
isc_hmacsha512_t h512;
} ctx;
isc_result_t result;
isccc_region_t source, target;
unsigned char digest[ISC_SHA512_DIGESTLENGTH];
unsigned char digestb64[HSHA_LENGTH + 4];
source.rstart = digest;
switch (algorithm) {
case ISCCC_ALG_HMACMD5:
isc_hmacmd5_init(&ctx.hmd5, secret->rstart,
REGION_SIZE(*secret));
isc_hmacmd5_update(&ctx.hmd5, data, length);
isc_hmacmd5_sign(&ctx.hmd5, digest);
source.rend = digest + ISC_MD5_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA1:
isc_hmacsha1_init(&ctx.hsha, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha1_update(&ctx.hsha, data, length);
isc_hmacsha1_sign(&ctx.hsha, digest,
ISC_SHA1_DIGESTLENGTH);
source.rend = digest + ISC_SHA1_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA224:
isc_hmacsha224_init(&ctx.h224, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha224_update(&ctx.h224, data, length);
isc_hmacsha224_sign(&ctx.h224, digest,
ISC_SHA224_DIGESTLENGTH);
source.rend = digest + ISC_SHA224_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA256:
isc_hmacsha256_init(&ctx.h256, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha256_update(&ctx.h256, data, length);
isc_hmacsha256_sign(&ctx.h256, digest,
ISC_SHA256_DIGESTLENGTH);
source.rend = digest + ISC_SHA256_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA384:
isc_hmacsha384_init(&ctx.h384, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha384_update(&ctx.h384, data, length);
isc_hmacsha384_sign(&ctx.h384, digest,
ISC_SHA384_DIGESTLENGTH);
source.rend = digest + ISC_SHA384_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA512:
isc_hmacsha512_init(&ctx.h512, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha512_update(&ctx.h512, data, length);
isc_hmacsha512_sign(&ctx.h512, digest,
ISC_SHA512_DIGESTLENGTH);
source.rend = digest + ISC_SHA512_DIGESTLENGTH;
break;
default:
return (ISC_R_FAILURE);
}
memset(digestb64, 0, sizeof(digestb64));
target.rstart = digestb64;
target.rend = digestb64 + sizeof(digestb64);
result = isccc_base64_encode(&source, 64, "", &target);
if (result != ISC_R_SUCCESS)
return (result);
if (algorithm == ISCCC_ALG_HMACMD5)
PUT_MEM(digestb64, HMD5_LENGTH, hmac);
else
PUT_MEM(digestb64, HSHA_LENGTH, hmac);
return (ISC_R_SUCCESS);
}
static isc_result_t
verify(isccc_sexpr_t *alist, unsigned char *data, unsigned int length,
isc_uint32_t algorithm, isccc_region_t *secret)
{
union {
isc_hmacmd5_t hmd5;
isc_hmacsha1_t hsha;
isc_hmacsha224_t h224;
isc_hmacsha256_t h256;
isc_hmacsha384_t h384;
isc_hmacsha512_t h512;
} ctx;
isccc_region_t source;
isccc_region_t target;
isc_result_t result;
isccc_sexpr_t *_auth, *hmac;
unsigned char digest[ISC_SHA512_DIGESTLENGTH];
unsigned char digestb64[HSHA_LENGTH * 4];
/*
* Extract digest.
*/
_auth = isccc_alist_lookup(alist, "_auth");
if (!isccc_alist_alistp(_auth))
return (ISC_R_FAILURE);
if (algorithm == ISCCC_ALG_HMACMD5)
hmac = isccc_alist_lookup(_auth, "hmd5");
else
hmac = isccc_alist_lookup(_auth, "hsha");
if (!isccc_sexpr_binaryp(hmac))
return (ISC_R_FAILURE);
/*
* Compute digest.
*/
source.rstart = digest;
target.rstart = digestb64;
switch (algorithm) {
case ISCCC_ALG_HMACMD5:
isc_hmacmd5_init(&ctx.hmd5, secret->rstart,
REGION_SIZE(*secret));
isc_hmacmd5_update(&ctx.hmd5, data, length);
isc_hmacmd5_sign(&ctx.hmd5, digest);
source.rend = digest + ISC_MD5_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA1:
isc_hmacsha1_init(&ctx.hsha, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha1_update(&ctx.hsha, data, length);
isc_hmacsha1_sign(&ctx.hsha, digest,
ISC_SHA1_DIGESTLENGTH);
source.rend = digest + ISC_SHA1_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA224:
isc_hmacsha224_init(&ctx.h224, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha224_update(&ctx.h224, data, length);
isc_hmacsha224_sign(&ctx.h224, digest,
ISC_SHA224_DIGESTLENGTH);
source.rend = digest + ISC_SHA224_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA256:
isc_hmacsha256_init(&ctx.h256, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha256_update(&ctx.h256, data, length);
isc_hmacsha256_sign(&ctx.h256, digest,
ISC_SHA256_DIGESTLENGTH);
source.rend = digest + ISC_SHA256_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA384:
isc_hmacsha384_init(&ctx.h384, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha384_update(&ctx.h384, data, length);
isc_hmacsha384_sign(&ctx.h384, digest,
ISC_SHA384_DIGESTLENGTH);
source.rend = digest + ISC_SHA384_DIGESTLENGTH;
break;
case ISCCC_ALG_HMACSHA512:
isc_hmacsha512_init(&ctx.h512, secret->rstart,
REGION_SIZE(*secret));
isc_hmacsha512_update(&ctx.h512, data, length);
isc_hmacsha512_sign(&ctx.h512, digest,
ISC_SHA512_DIGESTLENGTH);
source.rend = digest + ISC_SHA512_DIGESTLENGTH;
break;
default:
return (ISC_R_FAILURE);
}
target.rstart = digestb64;
target.rend = digestb64 + sizeof(digestb64);
memset(digestb64, 0, sizeof(digestb64));
result = isccc_base64_encode(&source, 64, "", &target);
if (result != ISC_R_SUCCESS)
return (result);
/*
* Verify.
*/
if (algorithm == ISCCC_ALG_HMACMD5) {
unsigned char *value;
value = (unsigned char *) isccc_sexpr_tostring(hmac);
if (!isc_safe_memequal(value, digestb64, HMD5_LENGTH))
return (ISCCC_R_BADAUTH);
} else {
unsigned char *value;
isc_uint32_t valalg;
value = (unsigned char *) isccc_sexpr_tostring(hmac);
GET8(valalg, value);
if ((valalg != algorithm) ||
!isc_safe_memequal(value, digestb64, HSHA_LENGTH))
return (ISCCC_R_BADAUTH);
}
return (ISC_R_SUCCESS);
}
int
main(int argc, char **argv) {
isc_sha1_t sha1;
isc_sha224_t sha224;
isc_md5_t md5;
isc_hmacmd5_t hmacmd5;
isc_hmacsha1_t hmacsha1;
isc_hmacsha224_t hmacsha224;
isc_hmacsha256_t hmacsha256;
isc_hmacsha384_t hmacsha384;
isc_hmacsha512_t hmacsha512;
unsigned char digest[ISC_SHA512_DIGESTLENGTH];
unsigned char buffer[1024];
const char *s;
unsigned char key[20];
UNUSED(argc);
UNUSED(argv);
s = "abc";
isc_sha1_init(&sha1);
memcpy(buffer, s, strlen(s));
isc_sha1_update(&sha1, buffer, strlen(s));
isc_sha1_final(&sha1, digest);
print_digest(s, "sha1", digest, ISC_SHA1_DIGESTLENGTH/4);
s = "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq";
isc_sha1_init(&sha1);
memcpy(buffer, s, strlen(s));
isc_sha1_update(&sha1, buffer, strlen(s));
isc_sha1_final(&sha1, digest);
print_digest(s, "sha1", digest, ISC_SHA1_DIGESTLENGTH/4);
s = "abc";
isc_sha224_init(&sha224);
memcpy(buffer, s, strlen(s));
isc_sha224_update(&sha224, buffer, strlen(s));
isc_sha224_final(digest, &sha224);
print_digest(s, "sha224", digest, ISC_SHA224_DIGESTLENGTH/4);
s = "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq";
isc_sha224_init(&sha224);
memcpy(buffer, s, strlen(s));
isc_sha224_update(&sha224, buffer, strlen(s));
isc_sha224_final(digest, &sha224);
print_digest(s, "sha224", digest, ISC_SHA224_DIGESTLENGTH/4);
s = "abc";
isc_md5_init(&md5);
memcpy(buffer, s, strlen(s));
isc_md5_update(&md5, buffer, strlen(s));
isc_md5_final(&md5, digest);
print_digest(s, "md5", digest, 4);
/*
* The 3 HMAC-MD5 examples from RFC2104
*/
s = "Hi There";
memset(key, 0x0b, 16);
isc_hmacmd5_init(&hmacmd5, key, 16);
memcpy(buffer, s, strlen(s));
isc_hmacmd5_update(&hmacmd5, buffer, strlen(s));
isc_hmacmd5_sign(&hmacmd5, digest);
print_digest(s, "hmacmd5", digest, 4);
s = "what do ya want for nothing?";
strcpy((char *)key, "Jefe");
isc_hmacmd5_init(&hmacmd5, key, 4);
memcpy(buffer, s, strlen(s));
isc_hmacmd5_update(&hmacmd5, buffer, strlen(s));
isc_hmacmd5_sign(&hmacmd5, digest);
print_digest(s, "hmacmd5", digest, 4);
s = "\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335";
memset(key, 0xaa, 16);
isc_hmacmd5_init(&hmacmd5, key, 16);
memcpy(buffer, s, strlen(s));
isc_hmacmd5_update(&hmacmd5, buffer, strlen(s));
isc_hmacmd5_sign(&hmacmd5, digest);
print_digest(s, "hmacmd5", digest, 4);
/*
* The 3 HMAC-SHA1 examples from RFC4634.
*/
s = "Hi There";
memset(key, 0x0b, 20);
isc_hmacsha1_init(&hmacsha1, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha1_update(&hmacsha1, buffer, strlen(s));
isc_hmacsha1_sign(&hmacsha1, digest, ISC_SHA1_DIGESTLENGTH);
print_digest(s, "hmacsha1", digest, ISC_SHA1_DIGESTLENGTH/4);
s = "what do ya want for nothing?";
strcpy((char *)key, "Jefe");
isc_hmacsha1_init(&hmacsha1, key, 4);
memcpy(buffer, s, strlen(s));
isc_hmacsha1_update(&hmacsha1, buffer, strlen(s));
isc_hmacsha1_sign(&hmacsha1, digest, ISC_SHA1_DIGESTLENGTH);
print_digest(s, "hmacsha1", digest, ISC_SHA1_DIGESTLENGTH/4);
s = "\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335";
memset(key, 0xaa, 20);
isc_hmacsha1_init(&hmacsha1, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha1_update(&hmacsha1, buffer, strlen(s));
isc_hmacsha1_sign(&hmacsha1, digest, ISC_SHA1_DIGESTLENGTH);
print_digest(s, "hmacsha1", digest, ISC_SHA1_DIGESTLENGTH/4);
/*
* The 3 HMAC-SHA224 examples from RFC4634.
*/
s = "Hi There";
memset(key, 0x0b, 20);
isc_hmacsha224_init(&hmacsha224, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha224_update(&hmacsha224, buffer, strlen(s));
isc_hmacsha224_sign(&hmacsha224, digest, ISC_SHA224_DIGESTLENGTH);
print_digest(s, "hmacsha224", digest, ISC_SHA224_DIGESTLENGTH/4);
s = "what do ya want for nothing?";
strcpy((char *)key, "Jefe");
isc_hmacsha224_init(&hmacsha224, key, 4);
memcpy(buffer, s, strlen(s));
isc_hmacsha224_update(&hmacsha224, buffer, strlen(s));
isc_hmacsha224_sign(&hmacsha224, digest, ISC_SHA224_DIGESTLENGTH);
print_digest(s, "hmacsha224", digest, ISC_SHA224_DIGESTLENGTH/4);
s = "\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335";
memset(key, 0xaa, 20);
isc_hmacsha224_init(&hmacsha224, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha224_update(&hmacsha224, buffer, strlen(s));
isc_hmacsha224_sign(&hmacsha224, digest, ISC_SHA224_DIGESTLENGTH);
print_digest(s, "hmacsha224", digest, ISC_SHA224_DIGESTLENGTH/4);
/*
* The 3 HMAC-SHA256 examples from RFC4634.
*/
s = "Hi There";
memset(key, 0x0b, 20);
isc_hmacsha256_init(&hmacsha256, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha256_update(&hmacsha256, buffer, strlen(s));
isc_hmacsha256_sign(&hmacsha256, digest, ISC_SHA256_DIGESTLENGTH);
print_digest(s, "hmacsha256", digest, ISC_SHA256_DIGESTLENGTH/4);
s = "what do ya want for nothing?";
strcpy((char *)key, "Jefe");
isc_hmacsha256_init(&hmacsha256, key, 4);
memcpy(buffer, s, strlen(s));
isc_hmacsha256_update(&hmacsha256, buffer, strlen(s));
isc_hmacsha256_sign(&hmacsha256, digest, ISC_SHA256_DIGESTLENGTH);
print_digest(s, "hmacsha256", digest, ISC_SHA256_DIGESTLENGTH/4);
s = "\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335";
memset(key, 0xaa, 20);
isc_hmacsha256_init(&hmacsha256, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha256_update(&hmacsha256, buffer, strlen(s));
isc_hmacsha256_sign(&hmacsha256, digest, ISC_SHA256_DIGESTLENGTH);
print_digest(s, "hmacsha256", digest, ISC_SHA256_DIGESTLENGTH/4);
/*
* The 3 HMAC-SHA384 examples from RFC4634.
*/
s = "Hi There";
memset(key, 0x0b, 20);
isc_hmacsha384_init(&hmacsha384, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha384_update(&hmacsha384, buffer, strlen(s));
isc_hmacsha384_sign(&hmacsha384, digest, ISC_SHA384_DIGESTLENGTH);
print_digest(s, "hmacsha384", digest, ISC_SHA384_DIGESTLENGTH/4);
s = "what do ya want for nothing?";
strcpy((char *)key, "Jefe");
isc_hmacsha384_init(&hmacsha384, key, 4);
memcpy(buffer, s, strlen(s));
isc_hmacsha384_update(&hmacsha384, buffer, strlen(s));
isc_hmacsha384_sign(&hmacsha384, digest, ISC_SHA384_DIGESTLENGTH);
print_digest(s, "hmacsha384", digest, ISC_SHA384_DIGESTLENGTH/4);
s = "\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335";
memset(key, 0xaa, 20);
isc_hmacsha384_init(&hmacsha384, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha384_update(&hmacsha384, buffer, strlen(s));
isc_hmacsha384_sign(&hmacsha384, digest, ISC_SHA384_DIGESTLENGTH);
print_digest(s, "hmacsha384", digest, ISC_SHA384_DIGESTLENGTH/4);
/*
* The 3 HMAC-SHA512 examples from RFC4634.
*/
s = "Hi There";
memset(key, 0x0b, 20);
isc_hmacsha512_init(&hmacsha512, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha512_update(&hmacsha512, buffer, strlen(s));
isc_hmacsha512_sign(&hmacsha512, digest, ISC_SHA512_DIGESTLENGTH);
print_digest(s, "hmacsha512", digest, ISC_SHA512_DIGESTLENGTH/4);
s = "what do ya want for nothing?";
strcpy((char *)key, "Jefe");
isc_hmacsha512_init(&hmacsha512, key, 4);
memcpy(buffer, s, strlen(s));
isc_hmacsha512_update(&hmacsha512, buffer, strlen(s));
isc_hmacsha512_sign(&hmacsha512, digest, ISC_SHA512_DIGESTLENGTH);
print_digest(s, "hmacsha512", digest, ISC_SHA512_DIGESTLENGTH/4);
s = "\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335"
"\335\335\335\335\335\335\335\335\335\335";
memset(key, 0xaa, 20);
isc_hmacsha512_init(&hmacsha512, key, 20);
memcpy(buffer, s, strlen(s));
isc_hmacsha512_update(&hmacsha512, buffer, strlen(s));
isc_hmacsha512_sign(&hmacsha512, digest, ISC_SHA512_DIGESTLENGTH);
print_digest(s, "hmacsha512", digest, ISC_SHA512_DIGESTLENGTH/4);
return (0);
}
