5 rsa - RSA public key cryptosystem
9 #include <openssl/rsa.h>
10 #include <openssl/engine.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);
17 int RSA_private_decrypt(int flen, unsigned char *from,
18 unsigned char *to, RSA *rsa, int padding);
20 int RSA_sign(int type, unsigned char *m, unsigned int m_len,
21 unsigned char *sigret, unsigned int *siglen, RSA *rsa);
22 int RSA_verify(int type, unsigned char *m, unsigned int m_len,
23 unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
25 int RSA_size(RSA *rsa);
27 RSA *RSA_generate_key(int num, unsigned long e,
28 void (*callback)(int,int,void *), void *cb_arg);
30 int RSA_check_key(RSA *rsa);
32 int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
33 void RSA_blinding_off(RSA *rsa);
35 void RSA_set_default_openssl_method(RSA_METHOD *meth);
36 RSA_METHOD *RSA_get_default_openssl_method(void);
37 int RSA_set_method(RSA *rsa, ENGINE *engine);
38 RSA_METHOD *RSA_get_method(RSA *rsa);
39 RSA_METHOD *RSA_PKCS1_SSLeay(void);
40 RSA_METHOD *RSA_null_method(void);
41 int RSA_flags(RSA *rsa);
42 RSA *RSA_new_method(ENGINE *engine);
44 int RSA_print(BIO *bp, RSA *x, int offset);
45 int RSA_print_fp(FILE *fp, RSA *x, int offset);
47 int RSA_get_ex_new_index(long argl, char *argp, int (*new_func)(),
48 int (*dup_func)(), void (*free_func)());
49 int RSA_set_ex_data(RSA *r,int idx,char *arg);
50 char *RSA_get_ex_data(RSA *r, int idx);
52 int RSA_private_encrypt(int flen, unsigned char *from,
53 unsigned char *to, RSA *rsa,int padding);
54 int RSA_public_decrypt(int flen, unsigned char *from,
55 unsigned char *to, RSA *rsa,int padding);
57 int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
58 unsigned int m_len, unsigned char *sigret, unsigned int *siglen,
60 int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
61 unsigned int m_len, unsigned char *sigbuf, unsigned int siglen,
66 These functions implement RSA public key encryption and signatures
67 as defined in PKCS #1 v2.0 [RFC 2437].
69 The B<RSA> structure consists of several BIGNUM components. It can
70 contain public as well as private RSA keys:
74 BIGNUM *n; // public modulus
75 BIGNUM *e; // public exponent
76 BIGNUM *d; // private exponent
77 BIGNUM *p; // secret prime factor
78 BIGNUM *q; // secret prime factor
79 BIGNUM *dmp1; // d mod (p-1)
80 BIGNUM *dmq1; // d mod (q-1)
81 BIGNUM *iqmp; // q^-1 mod p
86 In public keys, the private exponent and the related secret values are
89 B<p>, B<q>, B<dmp1>, B<dmq1> and B<iqmp> may be B<NULL> in private
90 keys, but the RSA operations are much faster when these values are
99 RSA was covered by a US patent which expired in September 2000.
103 L<rsa(1)|rsa(1)>, L<bn(3)|bn(3)>, L<dsa(3)|dsa(3)>, L<dh(3)|dh(3)>,
104 L<rand(3)|rand(3)>, L<RSA_new(3)|RSA_new(3)>,
105 L<RSA_public_encrypt(3)|RSA_public_encrypt(3)>,
106 L<RSA_sign(3)|RSA_sign(3)>, L<RSA_size(3)|RSA_size(3)>,
107 L<RSA_generate_key(3)|RSA_generate_key(3)>,
108 L<RSA_check_key(3)|RSA_check_key(3)>,
109 L<RSA_blinding_on(3)|RSA_blinding_on(3)>,
110 L<RSA_set_method(3)|RSA_set_method(3)>, L<RSA_print(3)|RSA_print(3)>,
111 L<RSA_get_ex_new_index(3)|RSA_get_ex_new_index(3)>,
112 L<RSA_private_encrypt(3)|RSA_private_encrypt(3)>,
113 L<RSA_sign_ASN1_OCTET_STRING(3)|RSA_sign_ASN1_OCTET_STRING(3)>,
114 L<RSA_padding_add_PKCS1_type_1(3)|RSA_padding_add_PKCS1_type_1(3)>