Add CryptoPkg (from UDK2010.UP3)
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10987 6f19259b-4bc3-4df7-8a09-765794883524
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hhtian
277
CryptoPkg/Library/BaseCryptLib/Pk/CryptRsa.c
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277
CryptoPkg/Library/BaseCryptLib/Pk/CryptRsa.c
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/** @file
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RSA Asymmetric Cipher Wrapper Implementation over OpenSSL.
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Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/BaseCryptLib.h>
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#include <openssl/rsa.h>
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/**
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Allocates and Initializes one RSA Context for subsequent use.
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@return Pointer to the RSA Context that has been initialized.
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If the allocations fails, RsaNew() returns NULL.
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**/
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VOID *
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EFIAPI
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RsaNew (
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VOID
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)
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{
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//
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// Allocates & Initializes RSA Context by OpenSSL RSA_new()
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//
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return (VOID *)RSA_new ();
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}
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/**
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Release the specified RSA Context.
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@param[in] RsaContext Pointer to the RSA context to be released.
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**/
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VOID
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EFIAPI
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RsaFree (
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IN VOID *RsaContext
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)
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{
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//
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// Free OpenSSL RSA Context
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//
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RSA_free ((RSA *)RsaContext);
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}
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/**
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Sets the tag-designated RSA key component into the established RSA context from
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the user-specified nonnegative integer (octet string format represented in RSA
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PKCS#1).
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If RsaContext is NULL, then ASSERT().
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@param[in, out] RsaContext Pointer to RSA context being set.
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@param[in] KeyTag Tag of RSA key component being set.
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@param[in] BigNumber Pointer to octet integer buffer.
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@param[in] BnLength Length of big number buffer in bytes.
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@return TRUE RSA key component was set successfully.
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@return FALSE Invalid RSA key component tag.
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**/
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BOOLEAN
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EFIAPI
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RsaSetKey (
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IN OUT VOID *RsaContext,
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IN RSA_KEY_TAG KeyTag,
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IN CONST UINT8 *BigNumber,
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IN UINTN BnLength
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)
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{
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RSA *RsaKey;
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//
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// ASSERT if RsaContext is NULL
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//
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ASSERT (RsaContext != NULL);
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RsaKey = (RSA *)RsaContext;
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//
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// Set RSA Key Components by converting octet string to OpenSSL BN representation.
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// NOTE: For RSA public key (used in signature verification), only public components
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// (N, e) are needed.
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//
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switch (KeyTag) {
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//
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// RSA Public Modulus (N)
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//
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case RsaKeyN:
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if (RsaKey->n != NULL) {
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BN_free (RsaKey->n);
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}
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RsaKey->n = BN_bin2bn (BigNumber, (int)BnLength, RsaKey->n);
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break;
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//
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// RSA Public Exponent (e)
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//
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case RsaKeyE:
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if (RsaKey->e != NULL) {
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BN_free (RsaKey->e);
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}
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RsaKey->e = BN_bin2bn (BigNumber, (int)BnLength, RsaKey->e);
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break;
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//
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// RSA Private Exponent (d)
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//
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case RsaKeyD:
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if (RsaKey->d != NULL) {
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BN_free (RsaKey->d);
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}
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RsaKey->d = BN_bin2bn (BigNumber, (int)BnLength, RsaKey->d);
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break;
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//
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// RSA Secret Prime Factor of Modulus (p)
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//
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case RsaKeyP:
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if (RsaKey->p != NULL) {
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BN_free (RsaKey->p);
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}
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RsaKey->p = BN_bin2bn (BigNumber, (int)BnLength, RsaKey->p);
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break;
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//
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// RSA Secret Prime Factor of Modules (q)
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//
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case RsaKeyQ:
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if (RsaKey->q != NULL) {
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BN_free (RsaKey->q);
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}
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RsaKey->q = BN_bin2bn (BigNumber, (int)BnLength, RsaKey->q);
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break;
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//
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// p's CRT Exponent (== d mod (p - 1))
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//
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case RsaKeyDp:
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if (RsaKey->dmp1 != NULL) {
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BN_free (RsaKey->dmp1);
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}
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RsaKey->dmp1 = BN_bin2bn (BigNumber, (int)BnLength, RsaKey->dmp1);
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break;
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//
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// q's CRT Exponent (== d mod (q - 1))
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//
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case RsaKeyDq:
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if (RsaKey->dmq1 != NULL) {
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BN_free (RsaKey->dmq1);
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}
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RsaKey->dmq1 = BN_bin2bn (BigNumber, (int)BnLength, RsaKey->dmq1);
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break;
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//
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// The CRT Coefficient (== 1/q mod p)
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//
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case RsaKeyQInv:
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if (RsaKey->iqmp != NULL) {
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BN_free (RsaKey->iqmp);
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}
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RsaKey->iqmp = BN_bin2bn (BigNumber, (int)BnLength, RsaKey->iqmp);
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break;
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default:
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return FALSE;
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}
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return TRUE;
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}
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/**
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Verifies the RSA-SSA signature with EMSA-PKCS1-v1_5 encoding scheme defined in
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RSA PKCS#1.
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If RsaContext is NULL, then ASSERT().
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If MessageHash is NULL, then ASSERT().
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If Signature is NULL, then ASSERT().
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If HashLength is not equal to the size of MD5, SHA-1 or SHA-256 digest, then ASSERT().
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@param[in] RsaContext Pointer to RSA context for signature verification.
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@param[in] MessageHash Pointer to octet message hash to be checked.
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@param[in] HashLength Length of the message hash in bytes.
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@param[in] Signature Pointer to RSA PKCS1-v1_5 signature to be verified.
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@param[in] SigLength Length of signature in bytes.
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@return TRUE Valid signature encoded in PKCS1-v1_5.
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@return FALSE Invalid signature or invalid RSA context.
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**/
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BOOLEAN
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EFIAPI
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RsaPkcs1Verify (
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IN VOID *RsaContext,
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IN CONST UINT8 *MessageHash,
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IN UINTN HashLength,
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IN UINT8 *Signature,
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IN UINTN SigLength
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)
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{
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INTN Length;
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//
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// ASSERT if RsaContext, MessageHash or Signature is NULL
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//
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ASSERT (RsaContext != NULL);
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ASSERT (MessageHash != NULL);
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ASSERT (Signature != NULL);
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//
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// ASSERT if unsupported hash length:
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// Only MD5, SHA-1 or SHA-256 digest size is supported
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//
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ASSERT ((HashLength == MD5_DIGEST_SIZE) || (HashLength == SHA1_DIGEST_SIZE) ||
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(HashLength == SHA256_DIGEST_SIZE));
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//
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// RSA PKCS#1 Signature Decoding using OpenSSL RSA Decryption with Public Key
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//
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Length = RSA_public_decrypt (
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(int)SigLength,
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Signature,
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Signature,
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RsaContext,
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RSA_PKCS1_PADDING
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);
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//
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// Invalid RSA Key or PKCS#1 Padding Checking Failed (if Length < 0)
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// NOTE: Length should be the addition of HashLength and some DER value.
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// Ignore more strict length checking here.
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//
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if (Length < (INTN) HashLength) {
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return FALSE;
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}
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//
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// Validate the MessageHash and Decoded Signature
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// NOTE: The decoded Signature should be the DER encoding of the DigestInfo value
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// DigestInfo ::= SEQUENCE {
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// digestAlgorithm AlgorithmIdentifier
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// digest OCTET STRING
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// }
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// Then Memory Comparing should skip the DER value of the underlying SEQUENCE
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// type and AlgorithmIdentifier.
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//
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if (CompareMem (MessageHash, Signature + Length - HashLength, HashLength) == 0) {
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//
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// Valid RSA PKCS#1 Signature
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//
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return TRUE;
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} else {
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//
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// Failed to verification
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//
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return FALSE;
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}
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}
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