/*
* Start HMAC-SHA512 process. Initialize an sha512 context and digest the key.
*/
void
isc_hmacsha512_init(isc_hmacsha512_t *ctx, const unsigned char *key,
unsigned int len)
{
unsigned char ipad[ISC_SHA512_BLOCK_LENGTH];
unsigned int i;
memset(ctx->key, 0, sizeof(ctx->key));
if (len > sizeof(ctx->key)) {
isc_sha512_t sha512ctx;
isc_sha512_init(&sha512ctx);
isc_sha512_update(&sha512ctx, key, len);
isc_sha512_final(ctx->key, &sha512ctx);
} else
memcpy(ctx->key, key, len);
isc_sha512_init(&ctx->sha512ctx);
memset(ipad, IPAD, sizeof(ipad));
for (i = 0; i < ISC_SHA512_BLOCK_LENGTH; i++)
ipad[i] ^= ctx->key[i];
isc_sha512_update(&ctx->sha512ctx, ipad, sizeof(ipad));
}
/*
* Compute signature - finalize SHA512 operation and reapply SHA512.
*/
void
isc_hmacsha512_sign(isc_hmacsha512_t *ctx, unsigned char *digest, size_t len) {
unsigned char opad[ISC_SHA512_BLOCK_LENGTH];
unsigned char newdigest[ISC_SHA512_DIGESTLENGTH];
unsigned int i;
REQUIRE(len <= ISC_SHA512_DIGESTLENGTH);
isc_sha512_final(newdigest, &ctx->sha512ctx);
memset(opad, OPAD, sizeof(opad));
for (i = 0; i < ISC_SHA512_BLOCK_LENGTH; i++)
opad[i] ^= ctx->key[i];
isc_sha512_init(&ctx->sha512ctx);
isc_sha512_update(&ctx->sha512ctx, opad, sizeof(opad));
isc_sha512_update(&ctx->sha512ctx, newdigest, ISC_SHA512_DIGESTLENGTH);
isc_sha512_final(newdigest, &ctx->sha512ctx);
memcpy(digest, newdigest, len);
memset(newdigest, 0, sizeof(newdigest));
}
int
main(int argc, char **argv) {
isc_buffer_t buf;
unsigned char key[1024];
char secret[1024];
char base64[(1024*4)/3];
isc_region_t r;
isc_result_t result;
if (argc != 3) {
fprintf(stderr, "Usage:\t%s algorithm secret\n", argv[0]);
fprintf(stderr, "\talgorithm: (MD5 | SHA1 | SHA224 | "
"SHA256 | SHA384 | SHA512)\n");
return (1);
}
isc_buffer_init(&buf, secret, sizeof(secret));
result = isc_base64_decodestring(argv[2], &buf);
if (result != ISC_R_SUCCESS) {
fprintf(stderr, "error: %s\n", isc_result_totext(result));
return (1);
}
isc__buffer_usedregion(&buf, &r);
if (!strcasecmp(argv[1], "md5") ||
!strcasecmp(argv[1], "hmac-md5")) {
if (r.length > HMAC_LEN) {
isc_md5_t md5ctx;
isc_md5_init(&md5ctx);
isc_md5_update(&md5ctx, r.base, r.length);
isc_md5_final(&md5ctx, key);
r.base = key;
r.length = ISC_MD5_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha1") ||
!strcasecmp(argv[1], "hmac-sha1")) {
if (r.length > ISC_SHA1_DIGESTLENGTH) {
isc_sha1_t sha1ctx;
isc_sha1_init(&sha1ctx);
isc_sha1_update(&sha1ctx, r.base, r.length);
isc_sha1_final(&sha1ctx, key);
r.base = key;
r.length = ISC_SHA1_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha224") ||
!strcasecmp(argv[1], "hmac-sha224")) {
if (r.length > ISC_SHA224_DIGESTLENGTH) {
isc_sha224_t sha224ctx;
isc_sha224_init(&sha224ctx);
isc_sha224_update(&sha224ctx, r.base, r.length);
isc_sha224_final(key, &sha224ctx);
r.base = key;
r.length = ISC_SHA224_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha256") ||
!strcasecmp(argv[1], "hmac-sha256")) {
if (r.length > ISC_SHA256_DIGESTLENGTH) {
isc_sha256_t sha256ctx;
isc_sha256_init(&sha256ctx);
isc_sha256_update(&sha256ctx, r.base, r.length);
isc_sha256_final(key, &sha256ctx);
r.base = key;
r.length = ISC_SHA256_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha384") ||
!strcasecmp(argv[1], "hmac-sha384")) {
if (r.length > ISC_SHA384_DIGESTLENGTH) {
isc_sha384_t sha384ctx;
isc_sha384_init(&sha384ctx);
isc_sha384_update(&sha384ctx, r.base, r.length);
isc_sha384_final(key, &sha384ctx);
r.base = key;
r.length = ISC_SHA384_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha512") ||
!strcasecmp(argv[1], "hmac-sha512")) {
if (r.length > ISC_SHA512_DIGESTLENGTH) {
isc_sha512_t sha512ctx;
isc_sha512_init(&sha512ctx);
isc_sha512_update(&sha512ctx, r.base, r.length);
isc_sha512_final(key, &sha512ctx);
r.base = key;
r.length = ISC_SHA512_DIGESTLENGTH;
}
} else {
fprintf(stderr, "unknown hmac/digest algorithm: %s\n", argv[1]);
return (1);
}
isc_buffer_init(&buf, base64, sizeof(base64));
result = isc_base64_totext(&r, 0, "", &buf);
if (result != ISC_R_SUCCESS) {
fprintf(stderr, "error: %s\n", isc_result_totext(result));
return (1);
}
fprintf(stdout, "%.*s\n", (int)isc_buffer_usedlength(&buf), base64);
return (0);
}
static isc_result_t
opensslrsa_createctx(dst_key_t *key, dst_context_t *dctx) {
#if USE_EVP
EVP_MD_CTX *evp_md_ctx;
const EVP_MD *type = NULL;
#endif
UNUSED(key);
REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
dctx->key->key_alg == DST_ALG_RSASHA1 ||
dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
dctx->key->key_alg == DST_ALG_RSASHA256 ||
dctx->key->key_alg == DST_ALG_RSASHA512);
#if USE_EVP
evp_md_ctx = EVP_MD_CTX_create();
if (evp_md_ctx == NULL)
return (ISC_R_NOMEMORY);
switch (dctx->key->key_alg) {
case DST_ALG_RSAMD5:
type = EVP_md5(); /* MD5 + RSA */
break;
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
type = EVP_sha1(); /* SHA1 + RSA */
break;
#ifdef HAVE_EVP_SHA256
case DST_ALG_RSASHA256:
type = EVP_sha256(); /* SHA256 + RSA */
break;
#endif
#ifdef HAVE_EVP_SHA512
case DST_ALG_RSASHA512:
type = EVP_sha512();
break;
#endif
default:
INSIST(0);
}
if (!EVP_DigestInit_ex(evp_md_ctx, type, NULL)) {
EVP_MD_CTX_destroy(evp_md_ctx);
return (dst__openssl_toresult2("EVP_DigestInit_ex",
ISC_R_FAILURE));
}
dctx->ctxdata.evp_md_ctx = evp_md_ctx;
#else
switch (dctx->key->key_alg) {
case DST_ALG_RSAMD5:
{
isc_md5_t *md5ctx;
md5ctx = isc_mem_get(dctx->mctx, sizeof(isc_md5_t));
if (md5ctx == NULL)
return (ISC_R_NOMEMORY);
isc_md5_init(md5ctx);
dctx->ctxdata.md5ctx = md5ctx;
}
break;
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
{
isc_sha1_t *sha1ctx;
sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t));
if (sha1ctx == NULL)
return (ISC_R_NOMEMORY);
isc_sha1_init(sha1ctx);
dctx->ctxdata.sha1ctx = sha1ctx;
}
break;
case DST_ALG_RSASHA256:
{
isc_sha256_t *sha256ctx;
sha256ctx = isc_mem_get(dctx->mctx,
sizeof(isc_sha256_t));
if (sha256ctx == NULL)
return (ISC_R_NOMEMORY);
isc_sha256_init(sha256ctx);
dctx->ctxdata.sha256ctx = sha256ctx;
}
break;
case DST_ALG_RSASHA512:
{
isc_sha512_t *sha512ctx;
sha512ctx = isc_mem_get(dctx->mctx,
sizeof(isc_sha512_t));
if (sha512ctx == NULL)
return (ISC_R_NOMEMORY);
isc_sha512_init(sha512ctx);
dctx->ctxdata.sha512ctx = sha512ctx;
}
break;
default:
INSIST(0);
}
#endif
return (ISC_R_SUCCESS);
}
static isc_result_t
opensslrsa_createctx(dst_key_t *key, dst_context_t *dctx) {
#if USE_EVP
EVP_MD_CTX *evp_md_ctx;
const EVP_MD *type = NULL;
#endif
UNUSED(key);
#ifndef PK11_MD5_DISABLE
REQUIRE(dctx->key->key_alg == DST_ALG_RSAMD5 ||
dctx->key->key_alg == DST_ALG_RSASHA1 ||
dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
dctx->key->key_alg == DST_ALG_RSASHA256 ||
dctx->key->key_alg == DST_ALG_RSASHA512);
#else
REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 ||
dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
dctx->key->key_alg == DST_ALG_RSASHA256 ||
dctx->key->key_alg == DST_ALG_RSASHA512);
#endif
/*
* Reject incorrect RSA key lengths.
*/
switch (dctx->key->key_alg) {
case DST_ALG_RSAMD5:
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
/* From RFC 3110 */
if (dctx->key->key_size > 4096)
return (ISC_R_FAILURE);
break;
case DST_ALG_RSASHA256:
/* From RFC 5702 */
if ((dctx->key->key_size < 512) ||
(dctx->key->key_size > 4096))
return (ISC_R_FAILURE);
break;
case DST_ALG_RSASHA512:
/* From RFC 5702 */
if ((dctx->key->key_size < 1024) ||
(dctx->key->key_size > 4096))
return (ISC_R_FAILURE);
break;
default:
INSIST(0);
}
#if USE_EVP
evp_md_ctx = EVP_MD_CTX_create();
if (evp_md_ctx == NULL)
return (ISC_R_NOMEMORY);
switch (dctx->key->key_alg) {
#ifndef PK11_MD5_DISABLE
case DST_ALG_RSAMD5:
type = EVP_md5(); /* MD5 + RSA */
break;
#endif
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
type = EVP_sha1(); /* SHA1 + RSA */
break;
#ifdef HAVE_EVP_SHA256
case DST_ALG_RSASHA256:
type = EVP_sha256(); /* SHA256 + RSA */
break;
#endif
#ifdef HAVE_EVP_SHA512
case DST_ALG_RSASHA512:
type = EVP_sha512();
break;
#endif
default:
INSIST(0);
}
if (!EVP_DigestInit_ex(evp_md_ctx, type, NULL)) {
EVP_MD_CTX_destroy(evp_md_ctx);
return (dst__openssl_toresult3(dctx->category,
"EVP_DigestInit_ex",
ISC_R_FAILURE));
}
dctx->ctxdata.evp_md_ctx = evp_md_ctx;
#else
switch (dctx->key->key_alg) {
#ifndef PK11_MD5_DISABLE
case DST_ALG_RSAMD5:
{
isc_md5_t *md5ctx;
md5ctx = isc_mem_get(dctx->mctx, sizeof(isc_md5_t));
if (md5ctx == NULL)
return (ISC_R_NOMEMORY);
isc_md5_init(md5ctx);
dctx->ctxdata.md5ctx = md5ctx;
}
break;
#endif
case DST_ALG_RSASHA1:
case DST_ALG_NSEC3RSASHA1:
{
isc_sha1_t *sha1ctx;
sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t));
if (sha1ctx == NULL)
return (ISC_R_NOMEMORY);
isc_sha1_init(sha1ctx);
dctx->ctxdata.sha1ctx = sha1ctx;
}
break;
case DST_ALG_RSASHA256:
{
isc_sha256_t *sha256ctx;
sha256ctx = isc_mem_get(dctx->mctx,
sizeof(isc_sha256_t));
if (sha256ctx == NULL)
return (ISC_R_NOMEMORY);
isc_sha256_init(sha256ctx);
dctx->ctxdata.sha256ctx = sha256ctx;
}
break;
case DST_ALG_RSASHA512:
{
isc_sha512_t *sha512ctx;
sha512ctx = isc_mem_get(dctx->mctx,
sizeof(isc_sha512_t));
if (sha512ctx == NULL)
return (ISC_R_NOMEMORY);
isc_sha512_init(sha512ctx);
dctx->ctxdata.sha512ctx = sha512ctx;
}
break;
default:
INSIST(0);
}
#endif
return (ISC_R_SUCCESS);
}
