X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=CryptoPkg%2FLibrary%2FBaseCryptLib%2FPk%2FCryptPkcs7.c;h=433175bbf1e1490eab7ce5ced1203caf32066949;hp=d0a6ea544a4ab336691660412bb1bbc175d2001d;hb=da9e7418daad22aee7b48790c1d1db5d2ede7e58;hpb=97f98500c1d40eba76210961e90ea5d354bcbc18
diff --git a/CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7.c b/CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7.c
index d0a6ea544a..433175bbf1 100644
--- a/CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7.c
+++ b/CryptoPkg/Library/BaseCryptLib/Pk/CryptPkcs7.c
@@ -1,7 +1,7 @@
/** @file
PKCS#7 SignedData Verification Wrapper Implementation over OpenSSL.
-Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.
+Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -12,19 +12,267 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
-#include
-#include
-#include
+#include "InternalCryptLib.h"
-#include
#include
#include
#include
+UINT8 mOidValue[9] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x07, 0x02 };
/**
- Verifies the validility of a PKCS#7 signed data as described in "PKCS #7: Cryptographic
- Message Syntax Standard".
+ Verification callback function to override any existing callbacks in OpenSSL
+ for intermediate certificate supports.
+
+ @param[in] Status Original status before calling this callback.
+ @param[in] Context X509 store context.
+
+ @retval 1 Current X509 certificate is verified successfully.
+ @retval 0 Verification failed.
+
+**/
+int
+X509VerifyCb (
+ IN int Status,
+ IN X509_STORE_CTX *Context
+ )
+{
+ X509_OBJECT *Obj;
+ INTN Error;
+ INTN Index;
+ INTN Count;
+
+ Obj = NULL;
+ Error = (INTN) X509_STORE_CTX_get_error (Context);
+
+ //
+ // X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT and X509_V_ERR_UNABLE_TO_GET_ISSUER_
+ // CERT_LOCALLY mean a X509 certificate is not self signed and its issuer
+ // can not be found in X509_verify_cert of X509_vfy.c.
+ // In order to support intermediate certificate node, we override the
+ // errors if the certification is obtained from X509 store, i.e. it is
+ // a trusted ceritifcate node that is enrolled by user.
+ // Besides,X509_V_ERR_CERT_UNTRUSTED and X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE
+ // are also ignored to enable such feature.
+ //
+ if ((Error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT) ||
+ (Error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY)) {
+ Obj = (X509_OBJECT *) OPENSSL_malloc (sizeof (X509_OBJECT));
+ if (Obj == NULL) {
+ return 0;
+ }
+
+ Obj->type = X509_LU_X509;
+ Obj->data.x509 = Context->current_cert;
+
+ CRYPTO_w_lock (CRYPTO_LOCK_X509_STORE);
+
+ if (X509_OBJECT_retrieve_match (Context->ctx->objs, Obj)) {
+ Status = 1;
+ } else {
+ //
+ // If any certificate in the chain is enrolled as trusted certificate,
+ // pass the certificate verification.
+ //
+ if (Error == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY) {
+ Count = (INTN) sk_X509_num (Context->chain);
+ for (Index = 0; Index < Count; Index++) {
+ Obj->data.x509 = sk_X509_value (Context->chain, (int) Index);
+ if (X509_OBJECT_retrieve_match (Context->ctx->objs, Obj)) {
+ Status = 1;
+ break;
+ }
+ }
+ }
+ }
+
+ CRYPTO_w_unlock (CRYPTO_LOCK_X509_STORE);
+ }
+
+ if ((Error == X509_V_ERR_CERT_UNTRUSTED) ||
+ (Error == X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE)) {
+ Status = 1;
+ }
+
+ if (Obj != NULL) {
+ OPENSSL_free (Obj);
+ }
+
+ return Status;
+}
+
+/**
+ Creates a PKCS#7 signedData as described in "PKCS #7: Cryptographic Message
+ Syntax Standard, version 1.5". This interface is only intended to be used for
+ application to perform PKCS#7 functionality validation.
+
+ @param[in] PrivateKey Pointer to the PEM-formatted private key data for
+ data signing.
+ @param[in] PrivateKeySize Size of the PEM private key data in bytes.
+ @param[in] KeyPassword NULL-terminated passphrase used for encrypted PEM
+ key data.
+ @param[in] InData Pointer to the content to be signed.
+ @param[in] InDataSize Size of InData in bytes.
+ @param[in] SignCert Pointer to signer's DER-encoded certificate to sign with.
+ @param[in] OtherCerts Pointer to an optional additional set of certificates to
+ include in the PKCS#7 signedData (e.g. any intermediate
+ CAs in the chain).
+ @param[out] SignedData Pointer to output PKCS#7 signedData.
+ @param[out] SignedDataSize Size of SignedData in bytes.
+
+ @retval TRUE PKCS#7 data signing succeeded.
+ @retval FALSE PKCS#7 data signing failed.
+
+**/
+BOOLEAN
+EFIAPI
+Pkcs7Sign (
+ IN CONST UINT8 *PrivateKey,
+ IN UINTN PrivateKeySize,
+ IN CONST UINT8 *KeyPassword,
+ IN UINT8 *InData,
+ IN UINTN InDataSize,
+ IN UINT8 *SignCert,
+ IN UINT8 *OtherCerts OPTIONAL,
+ OUT UINT8 **SignedData,
+ OUT UINTN *SignedDataSize
+ )
+{
+ BOOLEAN Status;
+ EVP_PKEY *Key;
+ BIO *DataBio;
+ PKCS7 *Pkcs7;
+ UINT8 *RsaContext;
+ UINT8 *P7Data;
+ UINTN P7DataSize;
+ UINT8 *Tmp;
+
+ //
+ // Check input parameters.
+ //
+ if ((PrivateKey == NULL) || (KeyPassword == NULL) || (InData == NULL)) {
+ return FALSE;
+ }
+
+ if ((SignCert == NULL) || (SignedData == NULL) || (SignedDataSize == NULL)) {
+ return FALSE;
+ }
+
+ if (InDataSize > INT_MAX) {
+ return FALSE;
+ }
+
+ RsaContext = NULL;
+ Key = NULL;
+ Pkcs7 = NULL;
+ DataBio = NULL;
+ Status = FALSE;
+
+ //
+ // Retrieve RSA private key from PEM data.
+ //
+ Status = RsaGetPrivateKeyFromPem (
+ PrivateKey,
+ PrivateKeySize,
+ (CONST CHAR8 *) KeyPassword,
+ (VOID **) &RsaContext
+ );
+ if (!Status) {
+ return Status;
+ }
+
+ //
+ // Register & Initialize necessary digest algorithms and PRNG for PKCS#7 Handling
+ //
+ EVP_add_digest (EVP_md5());
+ EVP_add_digest (EVP_sha1());
+ EVP_add_digest (EVP_sha256());
+ RandomSeed (NULL, 0);
+
+ //
+ // Construct OpenSSL EVP_PKEY for private key.
+ //
+ Key = EVP_PKEY_new ();
+ if (Key == NULL) {
+ goto _Exit;
+ }
+ Key->save_type = EVP_PKEY_RSA;
+ Key->type = EVP_PKEY_type (EVP_PKEY_RSA);
+ Key->pkey.rsa = (RSA *) RsaContext;
+
+ //
+ // Convert the data to be signed to BIO format.
+ //
+ DataBio = BIO_new (BIO_s_mem ());
+ BIO_write (DataBio, InData, (int) InDataSize);
+
+ //
+ // Create the PKCS#7 signedData structure.
+ //
+ Pkcs7 = PKCS7_sign (
+ (X509 *) SignCert,
+ Key,
+ (STACK_OF(X509) *) OtherCerts,
+ DataBio,
+ PKCS7_BINARY | PKCS7_NOATTR | PKCS7_DETACHED
+ );
+ if (Pkcs7 == NULL) {
+ goto _Exit;
+ }
+
+ //
+ // Convert PKCS#7 signedData structure into DER-encoded buffer.
+ //
+ P7DataSize = i2d_PKCS7 (Pkcs7, NULL);
+ if (P7DataSize <= 19) {
+ goto _Exit;
+ }
+ P7Data = OPENSSL_malloc (P7DataSize);
+ Tmp = P7Data;
+ P7DataSize = i2d_PKCS7 (Pkcs7, (unsigned char **) &Tmp);
+
+ //
+ // Strip ContentInfo to content only for signeddata. The data be trimmed off
+ // is totally 19 bytes.
+ //
+ *SignedDataSize = P7DataSize - 19;
+ *SignedData = OPENSSL_malloc (*SignedDataSize);
+ CopyMem (*SignedData, P7Data + 19, *SignedDataSize);
+
+ OPENSSL_free (P7Data);
+
+ Status = TRUE;
+
+_Exit:
+ //
+ // Release Resources
+ //
+ if (RsaContext != NULL) {
+ RsaFree (RsaContext);
+ if (Key != NULL) {
+ Key->pkey.rsa = NULL;
+ }
+ }
+
+ if (Key != NULL) {
+ EVP_PKEY_free (Key);
+ }
+
+ if (DataBio != NULL) {
+ BIO_free (DataBio);
+ }
+
+ if (Pkcs7 != NULL) {
+ PKCS7_free (Pkcs7);
+ }
+
+ return Status;
+}
+
+/**
+ Verifies the validility of a PKCS#7 signed data as described in "PKCS #7:
+ Cryptographic Message Syntax Standard". The input signed data could be wrapped
+ in a ContentInfo structure.
If P7Data is NULL, then ASSERT().
@@ -36,8 +284,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
@param[in] InData Pointer to the content to be verified.
@param[in] DataLength Length of InData in bytes.
- @return TRUE The specified PKCS#7 signed data is valid.
- @return FALSE Invalid PKCS#7 signed data.
+ @retval TRUE The specified PKCS#7 signed data is valid.
+ @retval FALSE Invalid PKCS#7 signed data.
**/
BOOLEAN
@@ -52,17 +300,24 @@ Pkcs7Verify (
)
{
PKCS7 *Pkcs7;
- UINT8 *Content;
BIO *CertBio;
BIO *DataBio;
BOOLEAN Status;
X509 *Cert;
X509_STORE *CertStore;
+ UINT8 *SignedData;
+ UINT8 *Temp;
+ UINTN SignedDataSize;
+ BOOLEAN Wrapped;
//
- // ASSERT if P7Data is NULL
+ // ASSERT if P7Data is NULL or P7Length is not larger than 19 bytes.
//
- ASSERT (P7Data != NULL);
+ ASSERT ((P7Data != NULL) || (P7Length <= 19));
+
+ if ((CertLength > INT_MAX) || (DataLength > INT_MAX)) {
+ return FALSE;
+ }
Status = FALSE;
Pkcs7 = NULL;
@@ -76,12 +331,84 @@ Pkcs7Verify (
//
EVP_add_digest (EVP_md5());
EVP_add_digest (EVP_sha1());
+ EVP_add_digest_alias (SN_sha1WithRSAEncryption, SN_sha1WithRSA);
EVP_add_digest (EVP_sha256());
+ //
+ // Check whether input P7Data is a wrapped ContentInfo structure or not.
+ //
+ Wrapped = FALSE;
+ if ((P7Data[4] == 0x06) && (P7Data[5] == 0x09)) {
+ if (CompareMem (P7Data + 6, mOidValue, sizeof (mOidValue)) == 0) {
+ if ((P7Data[15] == 0xA0) && (P7Data[16] == 0x82)) {
+ Wrapped = TRUE;
+ }
+ }
+ }
+
+ if (Wrapped) {
+ SignedData = (UINT8 *) P7Data;
+ SignedDataSize = P7Length;
+ } else {
+ //
+ // Wrap PKCS#7 signeddata to a ContentInfo structure - add a header in 19 bytes.
+ //
+ SignedDataSize = P7Length + 19;
+ SignedData = OPENSSL_malloc (SignedDataSize);
+ if (SignedData == NULL) {
+ return FALSE;
+ }
+
+ //
+ // Part1: 0x30, 0x82.
+ //
+ SignedData[0] = 0x30;
+ SignedData[1] = 0x82;
+
+ //
+ // Part2: Length1 = P7Length + 19 - 4, in big endian.
+ //
+ SignedData[2] = (UINT8) (((UINT16) (SignedDataSize - 4)) >> 8);
+ SignedData[3] = (UINT8) (((UINT16) (SignedDataSize - 4)) & 0xff);
+
+ //
+ // Part3: 0x06, 0x09.
+ //
+ SignedData[4] = 0x06;
+ SignedData[5] = 0x09;
+
+ //
+ // Part4: OID value -- 0x2A 0x86 0x48 0x86 0xF7 0x0D 0x01 0x07 0x02.
+ //
+ CopyMem (SignedData + 6, mOidValue, sizeof (mOidValue));
+
+ //
+ // Part5: 0xA0, 0x82.
+ //
+ SignedData[15] = 0xA0;
+ SignedData[16] = 0x82;
+
+ //
+ // Part6: Length2 = P7Length, in big endian.
+ //
+ SignedData[17] = (UINT8) (((UINT16) P7Length) >> 8);
+ SignedData[18] = (UINT8) (((UINT16) P7Length) & 0xff);
+
+ //
+ // Part7: P7Data.
+ //
+ CopyMem (SignedData + 19, P7Data, P7Length);
+ }
+
//
// Retrieve PKCS#7 Data (DER encoding)
//
- Pkcs7 = d2i_PKCS7 (NULL, &P7Data, (int)P7Length);
+ if (SignedDataSize > INT_MAX) {
+ goto _Exit;
+ }
+
+ Temp = SignedData;
+ Pkcs7 = d2i_PKCS7 (NULL, &Temp, (int) SignedDataSize);
if (Pkcs7 == NULL) {
goto _Exit;
}
@@ -93,23 +420,6 @@ Pkcs7Verify (
goto _Exit;
}
- //
- // Check PKCS#7 embedded signed content with InData.
- //
- if (InData != NULL) {
- //
- // NOTE: PKCS7_dataDecode() didn't work for Authenticode-format signed data due to
- // some authenticode-specific structure. Use opaque ASN.1 string to retrieve
- // PKCS#7 ContentInfo here.
- //
- Content = (UINT8 *)(Pkcs7->d.sign->contents->d.other->value.asn1_string->data);
-
- // Ignore two bytes for DER encoding of ASN.1 "SEQUENCE"
- if (CompareMem (Content + 2, InData, DataLength) != 0) {
- goto _Exit;
- }
- }
-
//
// Read DER-encoded root certificate and Construct X509 Certificate
//
@@ -134,6 +444,12 @@ Pkcs7Verify (
goto _Exit;
}
+ //
+ // Register customized X509 verification callback function to support
+ // trusted intermediate certificate anchor.
+ //
+ CertStore->verify_cb = X509VerifyCb;
+
//
// For generic PKCS#7 handling, InData may be NULL if the content is present
// in PKCS#7 structure. So ignore NULL checking here.
@@ -144,7 +460,7 @@ Pkcs7Verify (
//
// Verifies the PKCS#7 signedData structure
//
- Status = (BOOLEAN) PKCS7_verify (Pkcs7, NULL, CertStore, DataBio, NULL, 0);
+ Status = (BOOLEAN) PKCS7_verify (Pkcs7, NULL, CertStore, DataBio, NULL, PKCS7_BINARY);
_Exit:
//
@@ -156,5 +472,9 @@ _Exit:
X509_STORE_free (CertStore);
PKCS7_free (Pkcs7);
+ if (!Wrapped) {
+ OPENSSL_free (SignedData);
+ }
+
return Status;
}