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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.


         SHA1, SHA1_Init, SHA1_Update, SHA1_Final - Secure Hash


          #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);


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


         SHA1() returns a pointer to the hash value.
         SHA1_Init(), SHA1_Update() and SHA1_Final() do not return


         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


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


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

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