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2ea97746 CE |
1 | /* |
2 | * PDKIM - a RFC4871 (DKIM) implementation | |
3 | * | |
4 | * Copyright (C) 1995 - 2018 Exim maintainers | |
5 | * | |
6 | * RSA signing/verification interface | |
7 | */ | |
8 | ||
9 | #include "../exim.h" | |
10 | ||
11 | #ifndef DISABLE_DKIM /* entire file */ | |
12 | ||
13 | #include "crypt_ver.h" | |
14 | ||
15 | #ifdef SIGN_OPENSSL | |
16 | # include <openssl/rsa.h> | |
17 | # include <openssl/ssl.h> | |
18 | # include <openssl/err.h> | |
19 | #elif defined(SIGN_GNUTLS) | |
20 | # include <gnutls/gnutls.h> | |
21 | # include <gnutls/x509.h> | |
22 | # include <gnutls/abstract.h> | |
23 | #elif defined(SIGN_GCRYPT) | |
24 | # include <gcrypt.h> | |
25 | # include <libtasn1.h> | |
26 | #endif | |
27 | ||
28 | #include "../blob.h" | |
29 | ||
30 | typedef enum { | |
31 | KEYTYPE_RSA, | |
32 | KEYTYPE_ED25519 | |
33 | } keytype; | |
34 | ||
35 | typedef enum { | |
36 | KEYFMT_DER, /* an asn.1 structure */ | |
37 | KEYFMT_ED25519_BARE /* just the key */ | |
38 | } keyformat; | |
39 | ||
40 | ||
41 | #ifdef SIGN_OPENSSL | |
42 | ||
43 | typedef struct { | |
44 | keytype keytype; | |
45 | EVP_PKEY * key; | |
46 | } es_ctx; | |
47 | ||
48 | typedef struct { | |
49 | keytype keytype; | |
50 | EVP_PKEY * key; | |
51 | } ev_ctx; | |
52 | ||
53 | #elif defined(SIGN_GNUTLS) | |
54 | ||
55 | typedef struct { | |
56 | keytype keytype; | |
57 | gnutls_privkey_t key; | |
58 | } es_ctx; | |
59 | ||
60 | typedef struct { | |
61 | keytype keytype; | |
62 | gnutls_pubkey_t key; | |
63 | } ev_ctx; | |
64 | ||
65 | #elif defined(SIGN_GCRYPT) | |
66 | ||
67 | typedef struct { | |
68 | keytype keytype; | |
69 | gcry_mpi_t n; | |
70 | gcry_mpi_t e; | |
71 | gcry_mpi_t d; | |
72 | gcry_mpi_t p; | |
73 | gcry_mpi_t q; | |
74 | gcry_mpi_t dp; | |
75 | gcry_mpi_t dq; | |
76 | gcry_mpi_t qp; | |
77 | } es_ctx; | |
78 | ||
79 | typedef struct { | |
80 | keytype keytype; | |
81 | gcry_mpi_t n; | |
82 | gcry_mpi_t e; | |
83 | } ev_ctx; | |
84 | ||
85 | #endif | |
86 | ||
87 | ||
88 | extern void exim_dkim_init(void); | |
89 | extern gstring * exim_dkim_data_append(gstring *, uschar *); | |
90 | ||
91 | extern const uschar * exim_dkim_signing_init(const uschar *, es_ctx *); | |
92 | extern const uschar * exim_dkim_sign(es_ctx *, hashmethod, blob *, blob *); | |
93 | extern const uschar * exim_dkim_verify_init(blob *, keyformat, ev_ctx *); | |
94 | extern const uschar * exim_dkim_verify(ev_ctx *, hashmethod, blob *, blob *); | |
95 | ||
96 | #endif /*DISABLE_DKIM*/ | |
97 | /* End of File */ |