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Decouple EVP_get_digestbyobj from the giant OID table.

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libcrypto can now be split in two, with everything that depends on
crypto/asn1 in a separate library. That said, Chromium still needs
crypto/pkcs8 to be implemented with CBS/CBB first. (Also libssl and
anything which uses X509* directly.)

BUG=54

Change-Id: Iec976ae637209882408457e94a1eb2465bce8d56
Reviewed-on: https://boringssl-review.googlesource.com/13059
Reviewed-by: Adam Langley <alangley@gmail.com>
Commit-Queue: Adam Langley <alangley@gmail.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
This commit is contained in:
David Benjamin 2016-12-26 00:32:14 -05:00 committed by CQ bot account: commit-bot@chromium.org
parent 8f3f6be0d5
commit a5eee1c7f3
1 changed files with 32 additions and 3 deletions
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35
crypto/digest/digests.c
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@ -59,9 +59,10 @@
#include <assert.h>
#include <string.h>
#include <openssl/asn1.h>
#include <openssl/md4.h>
#include <openssl/md5.h>
#include <openssl/obj.h>
#include <openssl/nid.h>
#include <openssl/sha.h>
#include "internal.h"
@ -306,8 +307,36 @@ const EVP_MD* EVP_get_digestbynid(int nid) {
return NULL;
}
const EVP_MD* EVP_get_digestbyobj(const ASN1_OBJECT *obj) {
return EVP_get_digestbynid(OBJ_obj2nid(obj));
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 },
};
const EVP_MD *EVP_get_digestbyobj(const ASN1_OBJECT *obj) {
for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kMDOIDs); i++) {
if (obj->length == kMDOIDs[i].oid_len &&
memcmp(obj->data, kMDOIDs[i].oid, obj->length) == 0) {
return kMDOIDs[i].md_func();
}
}
return NULL;
}
const EVP_MD *EVP_get_digestbyname(const char *name) {