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comparison libtomcrypt/src/pk/rsa/rsa_export.c @ 1511:5916af64acd4 fuzz

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merge from main
author Matt Johnston <matt@ucc.asn.au>
date Sat, 17 Feb 2018 19:29:51 +0800
parents 6dba84798cd5
children e9dba7abd939
comparison
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1457:32f990cc96b1 1511:5916af64acd4
3 * LibTomCrypt is a library that provides various cryptographic 3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtom.org
10 */ 8 */
11 #include "tomcrypt.h" 9 #include "tomcrypt.h"
12 10
13 /** 11 /**
14 @file rsa_export.c 12 @file rsa_export.c
15 Export RSA LTC_PKCS keys, Tom St Denis 13 Export RSA PKCS keys, Tom St Denis
16 */ 14 */
17 15
18 #ifdef LTC_MRSA 16 #ifdef LTC_MRSA
19 17
20 /** 18 /**
21 This will export either an RSAPublicKey or RSAPrivateKey [defined in LTC_PKCS #1 v2.1] 19 This will export either an RSAPublicKey or RSAPrivateKey [defined in PKCS #1 v2.1]
22 @param out [out] Destination of the packet 20 @param out [out] Destination of the packet
23 @param outlen [in/out] The max size and resulting size of the packet 21 @param outlen [in/out] The max size and resulting size of the packet
24 @param type The type of exported key (PK_PRIVATE or PK_PUBLIC) 22 @param type The type of exported key (PK_PRIVATE or PK_PUBLIC)
25 @param key The RSA key to export 23 @param key The RSA key to export
26 @return CRYPT_OK if successful 24 @return CRYPT_OK if successful
27 */ 25 */
28 int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key) 26 int rsa_export(unsigned char *out, unsigned long *outlen, int type, rsa_key *key)
29 { 27 {
30 unsigned long zero=0; 28 unsigned long zero=0;
29 int err;
31 LTC_ARGCHK(out != NULL); 30 LTC_ARGCHK(out != NULL);
32 LTC_ARGCHK(outlen != NULL); 31 LTC_ARGCHK(outlen != NULL);
33 LTC_ARGCHK(key != NULL); 32 LTC_ARGCHK(key != NULL);
34 33
35 /* type valid? */ 34 /* type valid? */
37 return CRYPT_PK_INVALID_TYPE; 36 return CRYPT_PK_INVALID_TYPE;
38 } 37 }
39 38
40 if (type == PK_PRIVATE) { 39 if (type == PK_PRIVATE) {
41 /* private key */ 40 /* private key */
42 /* output is 41 /* output is
43 Version, n, e, d, p, q, d mod (p-1), d mod (q - 1), 1/q mod p 42 Version, n, e, d, p, q, d mod (p-1), d mod (q - 1), 1/q mod p
44 */ 43 */
45 return der_encode_sequence_multi(out, outlen, 44 return der_encode_sequence_multi(out, outlen,
46 LTC_ASN1_SHORT_INTEGER, 1UL, &zero, 45 LTC_ASN1_SHORT_INTEGER, 1UL, &zero,
47 LTC_ASN1_INTEGER, 1UL, key->N, 46 LTC_ASN1_INTEGER, 1UL, key->N,
48 LTC_ASN1_INTEGER, 1UL, key->e, 47 LTC_ASN1_INTEGER, 1UL, key->e,
49 LTC_ASN1_INTEGER, 1UL, key->d, 48 LTC_ASN1_INTEGER, 1UL, key->d,
50 LTC_ASN1_INTEGER, 1UL, key->p, 49 LTC_ASN1_INTEGER, 1UL, key->p,
51 LTC_ASN1_INTEGER, 1UL, key->q, 50 LTC_ASN1_INTEGER, 1UL, key->q,
52 LTC_ASN1_INTEGER, 1UL, key->dP, 51 LTC_ASN1_INTEGER, 1UL, key->dP,
53 LTC_ASN1_INTEGER, 1UL, key->dQ, 52 LTC_ASN1_INTEGER, 1UL, key->dQ,
54 LTC_ASN1_INTEGER, 1UL, key->qP, 53 LTC_ASN1_INTEGER, 1UL, key->qP,
55 LTC_ASN1_EOL, 0UL, NULL); 54 LTC_ASN1_EOL, 0UL, NULL);
56 } else { 55 } else {
57 /* public key */ 56 /* public key */
58 return der_encode_sequence_multi(out, outlen, 57 unsigned long tmplen, *ptmplen;
59 LTC_ASN1_INTEGER, 1UL, key->N, 58 unsigned char* tmp = NULL;
60 LTC_ASN1_INTEGER, 1UL, key->e, 59
60 if (type & PK_STD) {
61 tmplen = (mp_count_bits(key->N)/8)*2+8;
62 tmp = XMALLOC(tmplen);
63 ptmplen = &tmplen;
64 if (tmp == NULL) {
65 return CRYPT_MEM;
66 }
67 }
68 else {
69 tmp = out;
70 ptmplen = outlen;
71 }
72
73 err = der_encode_sequence_multi(tmp, ptmplen,
74 LTC_ASN1_INTEGER, 1UL, key->N,
75 LTC_ASN1_INTEGER, 1UL, key->e,
61 LTC_ASN1_EOL, 0UL, NULL); 76 LTC_ASN1_EOL, 0UL, NULL);
77
78 if ((err != CRYPT_OK) || !(type & PK_STD)) {
79 goto finish;
80 }
81
82 err = der_encode_subject_public_key_info(out, outlen,
83 PKA_RSA, tmp, tmplen, LTC_ASN1_NULL, NULL, 0);
84
85 finish:
86 if (tmp != out)
87 XFREE(tmp);
88 return err;
89
62 } 90 }
63 } 91 }
64 92
65 #endif /* LTC_MRSA */ 93 #endif /* LTC_MRSA */
66 94
67 /* $Source$ */ 95 /* ref: $Format:%D$ */
68 /* $Revision$ */ 96 /* git commit: $Format:%H$ */
69 /* $Date$ */ 97 /* commit time: $Format:%ai$ */