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comparison libtomcrypt/src/pk/rsa/rsa_encrypt_key.c @ 1435:f849a5ca2efc

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update to libtomcrypt 1.17 (with Dropbear changes)
author Matt Johnston <matt@ucc.asn.au>
date Sat, 24 Jun 2017 17:50:50 +0800
parents 0cbe8f6dbf9e
children 6dba84798cd5
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1434:27b9ddb06b09 1435:f849a5ca2efc
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 * 8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.com 9 * Tom St Denis, [email protected], http://libtom.org
10 */ 10 */
11 #include "tomcrypt.h" 11 #include "tomcrypt.h"
12 12
13 /** 13 /**
14 @file rsa_encrypt_key.c 14 @file rsa_encrypt_key.c
15 RSA PKCS #1 encryption, Tom St Denis and Andreas Lange 15 RSA LTC_PKCS #1 encryption, Tom St Denis and Andreas Lange
16 */ 16 */
17 17
18 #ifdef MRSA 18 #ifdef LTC_MRSA
19 19
20 /** 20 /**
21 (PKCS #1 v2.0) OAEP pad then encrypt 21 (LTC_PKCS #1 v2.0) OAEP pad then encrypt
22 @param in The plaintext 22 @param in The plaintext
23 @param inlen The length of the plaintext (octets) 23 @param inlen The length of the plaintext (octets)
24 @param out [out] The ciphertext 24 @param out [out] The ciphertext
25 @param outlen [in/out] The max size and resulting size of the ciphertext 25 @param outlen [in/out] The max size and resulting size of the ciphertext
26 @param lparam The system "lparam" for the encryption 26 @param lparam The system "lparam" for the encryption
27 @param lparamlen The length of lparam (octets) 27 @param lparamlen The length of lparam (octets)
28 @param prng An active PRNG 28 @param prng An active PRNG
29 @param prng_idx The index of the desired prng 29 @param prng_idx The index of the desired prng
30 @param hash_idx The index of the desired hash 30 @param hash_idx The index of the desired hash
31 @param padding Type of padding (LTC_PKCS_1_OAEP or LTC_PKCS_1_V1_5) 31 @param padding Type of padding (LTC_LTC_PKCS_1_OAEP or LTC_LTC_PKCS_1_V1_5)
32 @param key The RSA key to encrypt to 32 @param key The RSA key to encrypt to
33 @return CRYPT_OK if successful 33 @return CRYPT_OK if successful
34 */ 34 */
35 int rsa_encrypt_key_ex(const unsigned char *in, unsigned long inlen, 35 int rsa_encrypt_key_ex(const unsigned char *in, unsigned long inlen,
36 unsigned char *out, unsigned long *outlen, 36 unsigned char *out, unsigned long *outlen,
44 LTC_ARGCHK(out != NULL); 44 LTC_ARGCHK(out != NULL);
45 LTC_ARGCHK(outlen != NULL); 45 LTC_ARGCHK(outlen != NULL);
46 LTC_ARGCHK(key != NULL); 46 LTC_ARGCHK(key != NULL);
47 47
48 /* valid padding? */ 48 /* valid padding? */
49 if ((padding != LTC_PKCS_1_V1_5) && 49 if ((padding != LTC_LTC_PKCS_1_V1_5) &&
50 (padding != LTC_PKCS_1_OAEP)) { 50 (padding != LTC_LTC_PKCS_1_OAEP)) {
51 return CRYPT_PK_INVALID_PADDING; 51 return CRYPT_PK_INVALID_PADDING;
52 } 52 }
53 53
54 /* valid prng? */ 54 /* valid prng? */
55 if ((err = prng_is_valid(prng_idx)) != CRYPT_OK) { 55 if ((err = prng_is_valid(prng_idx)) != CRYPT_OK) {
56 return err; 56 return err;
57 } 57 }
58 58
59 if (padding == LTC_PKCS_1_OAEP) { 59 if (padding == LTC_LTC_PKCS_1_OAEP) {
60 /* valid hash? */ 60 /* valid hash? */
61 if ((err = hash_is_valid(hash_idx)) != CRYPT_OK) { 61 if ((err = hash_is_valid(hash_idx)) != CRYPT_OK) {
62 return err; 62 return err;
63 } 63 }
64 } 64 }
71 if (modulus_bytelen > *outlen) { 71 if (modulus_bytelen > *outlen) {
72 *outlen = modulus_bytelen; 72 *outlen = modulus_bytelen;
73 return CRYPT_BUFFER_OVERFLOW; 73 return CRYPT_BUFFER_OVERFLOW;
74 } 74 }
75 75
76 if (padding == LTC_PKCS_1_OAEP) { 76 if (padding == LTC_LTC_PKCS_1_OAEP) {
77 /* OAEP pad the key */ 77 /* OAEP pad the key */
78 x = *outlen; 78 x = *outlen;
79 if ((err = pkcs_1_oaep_encode(in, inlen, lparam, 79 if ((err = pkcs_1_oaep_encode(in, inlen, lparam,
80 lparamlen, modulus_bitlen, prng, prng_idx, hash_idx, 80 lparamlen, modulus_bitlen, prng, prng_idx, hash_idx,
81 out, &x)) != CRYPT_OK) { 81 out, &x)) != CRYPT_OK) {
82 return err; 82 return err;
83 } 83 }
84 } else { 84 } else {
85 /* PKCS #1 v1.5 pad the key */ 85 /* LTC_PKCS #1 v1.5 pad the key */
86 x = *outlen; 86 x = *outlen;
87 if ((err = pkcs_1_v1_5_encode(in, inlen, LTC_PKCS_1_EME, 87 if ((err = pkcs_1_v1_5_encode(in, inlen, LTC_LTC_PKCS_1_EME,
88 modulus_bitlen, prng, prng_idx, 88 modulus_bitlen, prng, prng_idx,
89 out, &x)) != CRYPT_OK) { 89 out, &x)) != CRYPT_OK) {
90 return err; 90 return err;
91 } 91 }
92 } 92 }
93 93
94 /* rsa exptmod the OAEP or PKCS #1 v1.5 pad */ 94 /* rsa exptmod the OAEP or LTC_PKCS #1 v1.5 pad */
95 return ltc_mp.rsa_me(out, x, out, outlen, PK_PUBLIC, key); 95 return ltc_mp.rsa_me(out, x, out, outlen, PK_PUBLIC, key);
96 } 96 }
97 97
98 #endif /* MRSA */ 98 #endif /* LTC_MRSA */
99 99
100 /* $Source: /cvs/libtom/libtomcrypt/src/pk/rsa/rsa_encrypt_key.c,v $ */ 100 /* $Source$ */
101 /* $Revision: 1.8 $ */ 101 /* $Revision$ */
102 /* $Date: 2006/11/01 09:18:22 $ */ 102 /* $Date$ */