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sha (3)
  • sha (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • sha (3) ( Solaris man: Библиотечные вызовы )
  • sha (3) ( FreeBSD man: Библиотечные вызовы )
  • >> sha (3) ( Linux man: Библиотечные вызовы )
  • Ключ sha обнаружен в базе ключевых слов.
  •  

    NAME

    SHA1, SHA1_Init, SHA1_Update, SHA1_Final - Secure Hash Algorithm
     
    

    SYNOPSIS

     #include <openssl/sha.h>
    
    

     unsigned char *SHA1(const unsigned char *d, unsigned long n,
                      unsigned char *md);
    
    

     void SHA1_Init(SHA_CTX *c);
     void SHA1_Update(SHA_CTX *c, const void *data,
                      unsigned long len);
     void SHA1_Final(unsigned char *md, SHA_CTX *c);
    
    
     

    DESCRIPTION

    SHA-1 (Secure Hash Algorithm) is a cryptographic hash function with a 160 bit output.

    SHA1() computes the SHA-1 message digest of the n bytes at d and places it in md (which must have space for SHA_DIGEST_LENGTH == 20 bytes of output). If md is NULL, the digest is placed in a static array.

    The following functions may be used if the message is not completely stored in memory:

    SHA1_Init() initializes a SHA_CTX structure.

    SHA1_Update() can be called repeatedly with chunks of the message to be hashed (len bytes at data).

    SHA1_Final() places the message digest in md, which must have space for SHA_DIGEST_LENGTH == 20 bytes of output, and erases the SHA_CTX.

    Applications should use the higher level functions EVP_DigestInit(3) etc. instead of calling the hash functions directly.

    The predecessor of SHA-1, SHA, is also implemented, but it should be used only when backward compatibility is required.  

    RETURN VALUES

    SHA1() returns a pointer to the hash value.

    SHA1_Init(), SHA1_Update() and SHA1_Final() do not return values.  

    CONFORMING TO

    SHA: US Federal Information Processing Standard FIPS PUB 180 (Secure Hash Standard), SHA-1: US Federal Information Processing Standard FIPS PUB 180-1 (Secure Hash Standard), ANSI X9.30  

    SEE ALSO

    ripemd(3), hmac(3), EVP_DigestInit(3)  

    HISTORY

    SHA1(), SHA1_Init(), SHA1_Update() and SHA1_Final() are available in all versions of SSLeay and OpenSSL.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    CONFORMING TO
    SEE ALSO
    HISTORY


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