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1/** @file\r
2 EFI_PKCS7_VERIFY_PROTOCOL as defined in UEFI 2.5.\r
3 The EFI_PKCS7_VERIFY_PROTOCOL is used to verify data signed using PKCS#7\r
4 formatted authentication. The PKCS#7 data to be verified must be binary\r
5 DER encoded.\r
6 PKCS#7 is a general-purpose cryptographic standard (defined by RFC2315,\r
7 available at http://tools.ietf.org/html/rfc2315).\r
8\r
6ded1955 9Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>\r
9344f092 10SPDX-License-Identifier: BSD-2-Clause-Patent\r
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11\r
12**/\r
13\r
14#ifndef __EFI_PKCS7_VERIFY_PROTOCOL_H__\r
15#define __EFI_PKCS7_VERIFY_PROTOCOL_H__\r
16\r
17#include <Guid/ImageAuthentication.h>\r
18\r
19///\r
20/// Global ID for the PKCS7 Verification Protocol\r
21///\r
22#define EFI_PKCS7_VERIFY_PROTOCOL_GUID \\r
23 { \\r
24 0x47889fb2, 0xd671, 0x4fab, {0xa0, 0xca, 0xdf, 0x0e, 0x44, 0xdf, 0x70, 0xd6 } \\r
25 }\r
26\r
27typedef struct _EFI_PKCS7_VERIFY_PROTOCOL EFI_PKCS7_VERIFY_PROTOCOL;\r
28\r
29\r
30/**\r
31 Processes a buffer containing binary DER-encoded PKCS7 signature.\r
32 The signed data content may be embedded within the buffer or separated. Funtion\r
33 verifies the signature of the content is valid and signing certificate was not\r
34 revoked and is contained within a list of trusted signers.\r
35\r
36 @param[in] This Pointer to EFI_PKCS7_VERIFY_PROTOCOL instance.\r
37 @param[in] SignedData Points to buffer containing ASN.1 DER-encoded PKCS7\r
38 signature.\r
39 @param[in] SignedDataSize The size of SignedData buffer in bytes.\r
40 @param[in] InData In case of detached signature, InData points to\r
41 buffer containing the raw message data previously\r
42 signed and to be verified by function. In case of\r
43 SignedData containing embedded data, InData must be\r
44 NULL.\r
45 @param[in] InDataSize When InData is used, the size of InData buffer in\r
46 bytes. When InData is NULL. This parameter must be\r
47 0.\r
48 @param[in] AllowedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r
49 structures. The list is terminated by a null\r
50 pointer. The EFI_SIGNATURE_LIST structures contain\r
51 lists of X.509 certificates of approved signers.\r
52 Function recognizes signer certificates of type\r
53 EFI_CERT_X509_GUID. Any hash certificate in AllowedDb\r
54 list is ignored by this function. Function returns\r
55 success if signer of the buffer is within this list\r
56 (and not within RevokedDb). This parameter is\r
57 required.\r
58 @param[in] RevokedDb Optional pointer to a list of pointers to\r
59 EFI_SIGNATURE_LIST structures. The list is terminated\r
60 by a null pointer. List of X.509 certificates of\r
61 revoked signers and revoked file hashes. Except as\r
62 noted in description of TimeStampDb signature\r
63 verification will always fail if the signer of the\r
64 file or the hash of the data component of the buffer\r
65 is in RevokedDb list. This list is optional and\r
66 caller may pass Null or pointer to NULL if not\r
67 required.\r
68 @param[in] TimeStampDb Optional pointer to a list of pointers to\r
69 EFI_SIGNATURE_LIST structures. The list is terminated\r
70 by a null pointer. This parameter can be used to pass\r
71 a list of X.509 certificates of trusted time stamp\r
72 signers. This list is optional and caller must pass\r
73 Null or pointer to NULL if not required.\r
74 @param[out] Content On input, points to an optional caller-allocated\r
75 buffer into which the function will copy the content\r
76 portion of the file after verification succeeds.\r
77 This parameter is optional and if NULL, no copy of\r
78 content from file is performed.\r
79 @param[in,out] ContentSize On input, points to the size in bytes of the optional\r
80 buffer Content previously allocated by caller. On\r
81 output, if the verification succeeds, the value\r
82 referenced by ContentSize will contain the actual\r
83 size of the content from signed file. If ContentSize\r
84 indicates the caller-allocated buffer is too small\r
85 to contain content, an error is returned, and\r
86 ContentSize will be updated with the required size.\r
87 This parameter must be 0 if Content is Null.\r
88\r
89 @retval EFI_SUCCESS Content signature was verified against hash of\r
90 content, the signer's certificate was not found in\r
91 RevokedDb, and was found in AllowedDb or if in signer\r
92 is found in both AllowedDb and RevokedDb, the\r
93 signing was allowed by reference to TimeStampDb as\r
94 described above, and no hash matching content hash\r
95 was found in RevokedDb.\r
96 @retval EFI_SECURITY_VIOLATION The SignedData buffer was correctly formatted but\r
97 signer was in RevokedDb or not in AllowedDb. Also\r
98 returned if matching content hash found in RevokedDb.\r
99 @retval EFI_COMPROMISED_DATA Calculated hash differs from signed hash.\r
100 @retval EFI_INVALID_PARAMETER SignedData is NULL or SignedDataSize is zero.\r
101 AllowedDb is NULL.\r
102 @retval EFI_INVALID_PARAMETER Content is not NULL and ContentSize is NULL.\r
103 @retval EFI_ABORTED Unsupported or invalid format in TimeStampDb,\r
104 RevokedDb or AllowedDb list contents was detected.\r
105 @retval EFI_NOT_FOUND Content not found because InData is NULL and no\r
106 content embedded in SignedData.\r
107 @retval EFI_UNSUPPORTED The SignedData buffer was not correctly formatted\r
108 for processing by the function.\r
109 @retval EFI_UNSUPPORTED Signed data embedded in SignedData but InData is not\r
110 NULL.\r
111 @retval EFI_BUFFER_TOO_SMALL The size of buffer indicated by ContentSize is too\r
112 small to hold the content. ContentSize updated to\r
113 required size.\r
114\r
115**/\r
116typedef\r
117EFI_STATUS\r
118(EFIAPI *EFI_PKCS7_VERIFY_BUFFER) (\r
119 IN EFI_PKCS7_VERIFY_PROTOCOL *This,\r
120 IN VOID *SignedData,\r
121 IN UINTN SignedDataSize,\r
122 IN VOID *InData OPTIONAL,\r
123 IN UINTN InDataSize,\r
124 IN EFI_SIGNATURE_LIST **AllowedDb,\r
125 IN EFI_SIGNATURE_LIST **RevokedDb OPTIONAL,\r
126 IN EFI_SIGNATURE_LIST **TimeStampDb OPTIONAL,\r
127 OUT VOID *Content OPTIONAL,\r
128 IN OUT UINTN *ContentSize\r
129 );\r
130\r
131/**\r
132 Processes a buffer containing binary DER-encoded detached PKCS7 signature.\r
133 The hash of the signed data content is calculated and passed by the caller. Function\r
134 verifies the signature of the content is valid and signing certificate was not revoked\r
135 and is contained within a list of trusted signers.\r
136\r
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137 Note: because this function uses hashes and the specification contains a variety of\r
138 hash choices, you should be aware that the check against the RevokedDb list\r
139 will improperly succeed if the signature is revoked using a different hash\r
140 algorithm. For this reason, you should either cycle through all UEFI supported\r
141 hashes to see if one is forbidden, or rely on a single hash choice only if the\r
142 UEFI signature authority only signs and revokes with a single hash (at time\r
143 of writing, this hash choice is SHA256).\r
144\r
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145 @param[in] This Pointer to EFI_PKCS7_VERIFY_PROTOCOL instance.\r
146 @param[in] Signature Points to buffer containing ASN.1 DER-encoded PKCS\r
147 detached signature.\r
148 @param[in] SignatureSize The size of Signature buffer in bytes.\r
149 @param[in] InHash InHash points to buffer containing the caller\r
150 calculated hash of the data. The parameter may not\r
151 be NULL.\r
152 @param[in] InHashSize The size in bytes of InHash buffer.\r
153 @param[in] AllowedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r
154 structures. The list is terminated by a null\r
155 pointer. The EFI_SIGNATURE_LIST structures contain\r
156 lists of X.509 certificates of approved signers.\r
157 Function recognizes signer certificates of type\r
158 EFI_CERT_X509_GUID. Any hash certificate in AllowedDb\r
159 list is ignored by this function. Function returns\r
160 success if signer of the buffer is within this list\r
161 (and not within RevokedDb). This parameter is\r
162 required.\r
163 @param[in] RevokedDb Optional pointer to a list of pointers to\r
164 EFI_SIGNATURE_LIST structures. The list is terminated\r
165 by a null pointer. List of X.509 certificates of\r
166 revoked signers and revoked file hashes. Signature\r
167 verification will always fail if the signer of the\r
168 file or the hash of the data component of the buffer\r
169 is in RevokedDb list. This parameter is optional\r
170 and caller may pass Null if not required.\r
171 @param[in] TimeStampDb Optional pointer to a list of pointers to\r
172 EFI_SIGNATURE_LIST structures. The list is terminated\r
173 by a null pointer. This parameter can be used to pass\r
174 a list of X.509 certificates of trusted time stamp\r
175 counter-signers.\r
176\r
177 @retval EFI_SUCCESS Signed hash was verified against caller-provided\r
178 hash of content, the signer's certificate was not\r
179 found in RevokedDb, and was found in AllowedDb or\r
180 if in signer is found in both AllowedDb and\r
181 RevokedDb, the signing was allowed by reference to\r
182 TimeStampDb as described above, and no hash matching\r
183 content hash was found in RevokedDb.\r
184 @retval EFI_SECURITY_VIOLATION The SignedData buffer was correctly formatted but\r
185 signer was in RevokedDb or not in AllowedDb. Also\r
186 returned if matching content hash found in RevokedDb.\r
187 @retval EFI_COMPROMISED_DATA Caller provided hash differs from signed hash. Or,\r
188 caller and encrypted hash are different sizes.\r
189 @retval EFI_INVALID_PARAMETER Signature is NULL or SignatureSize is zero. InHash\r
190 is NULL or InHashSize is zero. AllowedDb is NULL.\r
191 @retval EFI_ABORTED Unsupported or invalid format in TimeStampDb,\r
192 RevokedDb or AllowedDb list contents was detected.\r
193 @retval EFI_UNSUPPORTED The Signature buffer was not correctly formatted\r
194 for processing by the function.\r
195\r
196**/\r
197typedef\r
198EFI_STATUS\r
199(EFIAPI *EFI_PKCS7_VERIFY_SIGNATURE) (\r
200 IN EFI_PKCS7_VERIFY_PROTOCOL *This,\r
201 IN VOID *Signature,\r
202 IN UINTN SignatureSize,\r
203 IN VOID *InHash,\r
204 IN UINTN InHashSize,\r
205 IN EFI_SIGNATURE_LIST **AllowedDb,\r
206 IN EFI_SIGNATURE_LIST **RevokedDb OPTIONAL,\r
207 IN EFI_SIGNATURE_LIST **TimeStampDb OPTIONAL\r
208 );\r
209\r
210///\r
211/// The EFI_PKCS7_VERIFY_PROTOCOL is used to verify data signed using PKCS7\r
212/// structure. The PKCS7 data to be verified must be ASN.1 (DER) encoded.\r
213/// SHA256 must be supported as digest algorithm with RSA digest encryption.\r
214/// Support of other hash algorithms is optional.\r
215///\r
216struct _EFI_PKCS7_VERIFY_PROTOCOL {\r
217 EFI_PKCS7_VERIFY_BUFFER VerifyBuffer;\r
218 EFI_PKCS7_VERIFY_SIGNATURE VerifySignature;\r
219};\r
220\r
221extern EFI_GUID gEfiPkcs7VerifyProtocolGuid;\r
222\r
223#endif\r