sha(3) OpenSSL sha(3) NNAAMMEE SHA1, SHA1_Init, SHA1_Update, SHA1_Final, SHA224, SHA224_Init, SHA224_Update, SHA224_Final, SHA256, SHA256_Init, SHA256_Update, SHA256_Final, SHA384, SHA384_Init, SHA384_Update, SHA384_Final, SHA512, SHA512_Init, SHA512_Update, SHA512_Final - Secure Hash Algorithm SSYYNNOOPPSSIISS #include int SHA1_Init(SHA_CTX *c); int SHA1_Update(SHA_CTX *c, const void *data, size_t len); int SHA1_Final(unsigned char *md, SHA_CTX *c); unsigned char *SHA1(const unsigned char *d, size_t n, unsigned char *md); int SHA224_Init(SHA256_CTX *c); int SHA224_Update(SHA256_CTX *c, const void *data, size_t len); int SHA224_Final(unsigned char *md, SHA256_CTX *c); unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md); int SHA256_Init(SHA256_CTX *c); int SHA256_Update(SHA256_CTX *c, const void *data, size_t len); int SHA256_Final(unsigned char *md, SHA256_CTX *c); unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md); int SHA384_Init(SHA512_CTX *c); int SHA384_Update(SHA512_CTX *c, const void *data, size_t len); int SHA384_Final(unsigned char *md, SHA512_CTX *c); unsigned char *SHA384(const unsigned char *d, size_t n, unsigned char *md); int SHA512_Init(SHA512_CTX *c); int SHA512_Update(SHA512_CTX *c, const void *data, size_t len); int SHA512_Final(unsigned char *md, SHA512_CTX *c); unsigned char *SHA512(const unsigned char *d, size_t n, unsigned char *md); DDEESSCCRRIIPPTTIIOONN Applications should use the higher level functions _E_V_P___D_i_g_e_s_t_I_n_i_t(3) etc. instead of calling the hash functions directly. SHA-1 (Secure Hash Algorithm) is a cryptographic hash function with a 160 bit output. _S_H_A_1_(_) computes the SHA-1 message digest of the nn bytes at dd and places it in mmdd (which must have space for SHA_DIGEST_LENGTH == 20 bytes of output). If mmdd is NULL, the digest is placed in a static array. Note: setting mmdd to NULL is nnoott tthhrreeaadd ssaaffee. The following functions may be used if the message is not completely stored in memory: _S_H_A_1___I_n_i_t_(_) initializes a SSHHAA__CCTTXX structure. _S_H_A_1___U_p_d_a_t_e_(_) can be called repeatedly with chunks of the message to be hashed (lleenn bytes at ddaattaa). _S_H_A_1___F_i_n_a_l_(_) places the message digest in mmdd, which must have space for SHA_DIGEST_LENGTH == 20 bytes of output, and erases the SSHHAA__CCTTXX. The SHA224, SHA256, SHA384 and SHA512 families of functions operate in the same way as for the SHA1 functions. Note that SHA224 and SHA256 use a SSHHAA225566__CCTTXX object instead of SSHHAA__CCTTXX. SHA384 and SHA512 use SSHHAA551122__CCTTXX. The buffer mmdd must have space for the output from the SHA variant being used (defined by SHA224_DIGEST_LENGTH, SHA256_DIGEST_LENGTH, SHA384_DIGEST_LENGTH and SHA512_DIGEST_LENGTH). Also note that, as for the _S_H_A_1_(_) function above, the _S_H_A_2_2_4_(_), _S_H_A_2_5_6_(_), _S_H_A_3_8_4_(_) and _S_H_A_5_1_2_(_) functions are not thread safe if mmdd is NULL. The predecessor of SHA-1, SHA, is also implemented, but it should be used only when backward compatibility is required. RREETTUURRNN VVAALLUUEESS _S_H_A_1_(_), _S_H_A_2_2_4_(_), _S_H_A_2_5_6_(_), _S_H_A_3_8_4_(_) and _S_H_A_5_1_2_(_) return a pointer to the hash value. _S_H_A_1___I_n_i_t_(_), _S_H_A_1___U_p_d_a_t_e_(_) and _S_H_A_1___F_i_n_a_l_(_) and equivalent SHA224, SHA256, SHA384 and SHA512 functions return 1 for success, 0 otherwise. CCOONNFFOORRMMIINNGG TTOO US Federal Information Processing Standard FIPS PUB 180-4 (Secure Hash Standard), ANSI X9.30 SSEEEE AALLSSOO _r_i_p_e_m_d(3), _h_m_a_c(3), _E_V_P___D_i_g_e_s_t_I_n_i_t(3) HHIISSTTOORRYY _S_H_A_1_(_), _S_H_A_1___I_n_i_t_(_), _S_H_A_1___U_p_d_a_t_e_(_) and _S_H_A_1___F_i_n_a_l_(_) are available in all versions of SSLeay and OpenSSL. 1.0.2u 2019-12-20 sha(3)