rsa (3)

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========================================================================

NAME

SYNOPSIS

 #include <openssl/rsa.h>
 #include <openssl/engine.h>

 RSA * RSA_new(void);
 void RSA_free(RSA *rsa);

 int RSA_public_encrypt(int flen, unsigned char *from,
    unsigned char *to, RSA *rsa, int padding);
 int RSA_private_decrypt(int flen, unsigned char *from,
    unsigned char *to, RSA *rsa, int padding);
 int RSA_private_encrypt(int flen, unsigned char *from,
    unsigned char *to, RSA *rsa,int padding);
 int RSA_public_decrypt(int flen, unsigned char *from, 
    unsigned char *to, RSA *rsa,int padding);

 int RSA_sign(int type, unsigned char *m, unsigned int m_len,
    unsigned char *sigret, unsigned int *siglen, RSA *rsa);
 int RSA_verify(int type, unsigned char *m, unsigned int m_len,
    unsigned char *sigbuf, unsigned int siglen, RSA *rsa);

 int RSA_size(const RSA *rsa);

 RSA *RSA_generate_key(int num, unsigned long e,
    void (*callback)(int,int,void *), void *cb_arg);

 int RSA_check_key(RSA *rsa);

 int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
 void RSA_blinding_off(RSA *rsa);

 void RSA_set_default_method(const RSA_METHOD *meth);
 const RSA_METHOD *RSA_get_default_method(void);
 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);
 const RSA_METHOD *RSA_get_method(const RSA *rsa);
 RSA_METHOD *RSA_PKCS1_SSLeay(void);
 RSA_METHOD *RSA_null_method(void);
 int RSA_flags(const RSA *rsa);
 RSA *RSA_new_method(ENGINE *engine);

 int RSA_print(BIO *bp, RSA *x, int offset);
 int RSA_print_fp(FILE *fp, RSA *x, int offset);

 int RSA_get_ex_new_index(long argl, char *argp, int (*new_func)(),
    int (*dup_func)(), void (*free_func)());
 int RSA_set_ex_data(RSA *r,int idx,char *arg);
 char *RSA_get_ex_data(RSA *r, int idx);

 int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
    unsigned int m_len, unsigned char *sigret, unsigned int *siglen,
    RSA *rsa);
 int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
    unsigned int m_len, unsigned char *sigbuf, unsigned int siglen,
    RSA *rsa);

DESCRIPTION

The

 struct
        {
        BIGNUM *n;              // public modulus
        BIGNUM *e;              // public exponent
        BIGNUM *d;              // private exponent
        BIGNUM *p;              // secret prime factor
        BIGNUM *q;              // secret prime factor
        BIGNUM *dmp1;           // d mod (p-1)
        BIGNUM *dmq1;           // d mod (q-1)
        BIGNUM *iqmp;           // q^-1 mod p
        // ...
        };
 RSA

In public keys, the private exponent and the related secret values are

p, q, dmp1, dmq1 and iqmp may be

Note that

CONFORMING TO

PATENTS

SEE ALSO