RSA Primitives

RSA primitives, including key setup. More...

Files
file	ocrypto_rsa_primitives.h
	RSA primitives, including key setup.

Data Structures
struct	ocrypto_rsa_pub_key
struct	ocrypto_rsa_key
struct	ocrypto_rsa_crt_key

Macros
#define	OCRYPTO_RSA_PUB_KEY_SIZE(bits)
#define	OCRYPTO_RSA_KEY_SIZE(bits)
#define	OCRYPTO_RSA_CRT_KEY_SIZE(bits)
#define	OCRYPTO_RSA_PUB_MEM_SIZE(bits)
#define	OCRYPTO_RSA_MEM_SIZE(bits)
#define	OCRYPTO_RSA_CRT_MEM_SIZE(bits)

variable-bit RSA key setup
This group of functions is used for generic RSA key setup.
int	ocrypto_rsa_init_pub_key (ocrypto_rsa_pub_key *key, uint32_t *key_mem, const uint8_t *n, size_t n_len, uint32_t e)
int	ocrypto_rsa_init_key (ocrypto_rsa_key *key, uint32_t *key_mem, const uint8_t *n, size_t n_len, const uint8_t *d, size_t d_len)
int	ocrypto_rsa_init_crt_key (ocrypto_rsa_crt_key *key, uint32_t *key_mem, const uint8_t *p, size_t p_len, const uint8_t *q, size_t q_len, const uint8_t *dp, size_t dp_len, const uint8_t *dq, size_t dq_len, const uint8_t *qinv, size_t qi_len)

RSA primitives
This group of functions is used for basic RSA arithmetic.
int	ocrypto_rsa_pub_exp (uint8_t *c, size_t c_len, const uint8_t *m, size_t m_len, const ocrypto_rsa_pub_key *pk, uint32_t *mem)
int	ocrypto_rsa_exp (uint8_t *m, size_t m_len, const uint8_t *c, size_t c_len, const ocrypto_rsa_key *key, uint32_t *mem)
int	ocrypto_rsa_crt_exp (uint8_t *m, size_t m_len, const uint8_t *c, size_t c_len, const ocrypto_rsa_crt_key *key, uint32_t *mem)

Detailed Description

RSA primitives, including key setup.

These functions support RSA key setup and primitives.

Supported key sizes (in bits) are: size >= 1024, size = 2^n or 3 * 2^n. This includes the popular sizes: 2048, 3072, 4096, ... bits.

Remarks

1024 bit keys are no longer considered secure; use of at least 2048 bit keys is recommended.

See also

RFC - PKCS #1: RSA Cryptography Specifications Version 2.2