5 rsa - RSA public key cryptosystem
9 #include <openssl/rsa.h>
13 void RSA_free(RSA *rsa);
15 int RSA_public_encrypt(int flen, unsigned char *from,
16 unsigned char *to, RSA *rsa, int padding);
18 int RSA_private_decrypt(int flen, unsigned char *from,
19 unsigned char *to, RSA *rsa, int padding);
21 int RSA_sign(int type, unsigned char *m, unsigned int m_len,
22 unsigned char *sigret, unsigned int *siglen, RSA *rsa);
24 int RSA_verify(int type, unsigned char *m, unsigned int m_len,
25 unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
27 int RSA_size(RSA *rsa);
29 RSA *RSA_generate_key(int num, unsigned long e,
30 void (*callback)(int,int,void *), void *cb_arg);
32 int RSA_check_key(RSA *rsa);
34 int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
36 void RSA_blinding_off(RSA *rsa);
38 void RSA_set_default_method(RSA_METHOD *meth);
40 RSA_METHOD *RSA_get_default_method(void);
42 RSA_METHOD *RSA_set_method(RSA *rsa, RSA_METHOD *meth);
44 RSA_METHOD *RSA_get_method(RSA *rsa);
46 RSA_METHOD *RSA_PKCS1_SSLeay(void);
48 RSA_METHOD *RSA_PKCS1_RSAref(void);
50 RSA_METHOD *RSA_null_method(void);
52 int RSA_flags(RSA *rsa);
54 RSA *RSA_new_method(RSA_METHOD *method);
56 int RSA_print(BIO *bp, RSA *x, int offset);
58 int RSA_print_fp(FILE *fp, RSA *x, int offset);
60 int RSA_get_ex_new_index(long argl, char *argp, int (*new_func)(),
61 int (*dup_func)(), void (*free_func)());
63 int RSA_set_ex_data(RSA *r,int idx,char *arg);
65 char *RSA_get_ex_data(RSA *r, int idx);
67 int RSA_private_encrypt(int flen, unsigned char *from,
68 unsigned char *to, RSA *rsa,int padding);
70 int RSA_public_decrypt(int flen, unsigned char *from,
71 unsigned char *to, RSA *rsa,int padding);
73 int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
74 unsigned int m_len, unsigned char *sigret, unsigned int *siglen,
77 int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
78 unsigned int m_len, unsigned char *sigbuf, unsigned int siglen,
81 int RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,
82 unsigned char *f, int fl);
84 int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
85 unsigned char *f, int fl, int rsa_len);
87 int RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,
88 unsigned char *f, int fl);
90 int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
91 unsigned char *f, int fl, int rsa_len);
93 int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen,
94 unsigned char *f, int fl, unsigned char *p, int pl);
96 int RSA_padding_check_PKCS1_OAEP(unsigned char *to, int tlen,
97 unsigned char *f, int fl, int rsa_len, unsigned char *p, int pl);
99 int RSA_padding_add_SSLv23(unsigned char *to, int tlen,
100 unsigned char *f, int fl);
102 int RSA_padding_check_SSLv23(unsigned char *to, int tlen,
103 unsigned char *f, int fl, int rsa_len);
105 int RSA_padding_add_none(unsigned char *to, int tlen,
106 unsigned char *f, int fl);
108 int RSA_padding_check_none(unsigned char *to, int tlen,
109 unsigned char *f, int fl, int rsa_len);
114 These functions implement RSA public key encryption and signatures
115 as defined in PKCS #1 v2.0 [RFC 2437].
117 The B<RSA> structure consists of several BIGNUM components. It can
118 contain public as well as private RSA keys:
122 BIGNUM *n; // public modulus
123 BIGNUM *e; // public exponent
124 BIGNUM *d; // private exponent
125 BIGNUM *p; // secret prime factor
126 BIGNUM *q; // secret prime factor
127 BIGNUM *dmp1; // d mod (p-1)
128 BIGNUM *dmq1; // d mod (q-1)
129 BIGNUM *iqmp; // q^-1 mod p
134 In public keys, the private exponent and the related secret values are
137 B<dmp1>, B<dmq1> and B<iqmp> may be B<NULL> in private keys, but the
138 RSA operations are much faster when these values are available.
142 RSA is covered by a US patent which expires in September 2000.
146 rsa(1), bn(3), dsa(3), dh(3), rand(3), RSA_new(3),
147 RSA_public_encrypt(3), RSA_sign(3), RSA_size(3), RSA_generate_key(3),
148 RSA_check_key(3), RSA_blinding_on(3), RSA_set_method(3), RSA_print(3),
149 RSA_get_ex_new_index(3), RSA_private_encrypt(3),
150 RSA_sign_ASN_OCTET_STRING(3), RSA_padding_add_PKCS1_type_1(3)