94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
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#include "mycrypt.h"
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int hash_memory(int hash, const unsigned char *data, unsigned long len, unsigned char *dst, unsigned long *outlen)
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{
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hash_state md;
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int errno;
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_ARGCHK(data != NULL);
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_ARGCHK(dst != NULL);
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_ARGCHK(outlen != NULL);
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if ((errno = hash_is_valid(hash)) != CRYPT_OK) {
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return errno;
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}
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if (*outlen < hash_descriptor[hash].hashsize) {
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return CRYPT_BUFFER_OVERFLOW;
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}
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*outlen = hash_descriptor[hash].hashsize;
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hash_descriptor[hash].init(&md);
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hash_descriptor[hash].process(&md, data, len);
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hash_descriptor[hash].done(&md, dst);
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return CRYPT_OK;
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}
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int hash_filehandle(int hash, FILE *in, unsigned char *dst, unsigned long *outlen)
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{
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#ifdef NO_FILE
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return CRYPT_ERROR;
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#else
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hash_state md;
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unsigned char buf[512];
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int x, errno;
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_ARGCHK(dst != NULL);
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_ARGCHK(outlen != NULL);
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_ARGCHK(in != NULL);
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if ((errno = hash_is_valid(hash)) != CRYPT_OK) {
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return errno;
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}
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if (*outlen < hash_descriptor[hash].hashsize) {
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return CRYPT_BUFFER_OVERFLOW;
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}
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*outlen = hash_descriptor[hash].hashsize;
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hash_descriptor[hash].init(&md);
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do {
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x = fread(buf, 1, sizeof(buf), in);
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hash_descriptor[hash].process(&md, buf, x);
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} while (x == sizeof(buf));
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hash_descriptor[hash].done(&md, dst);
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#ifdef CLEAN_STACK
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zeromem(buf, sizeof(buf));
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#endif
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return CRYPT_OK;
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#endif
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}
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int hash_file(int hash, const char *fname, unsigned char *dst, unsigned long *outlen)
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{
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#ifdef NO_FILE
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return CRYPT_ERROR;
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#else
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FILE *in;
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int errno;
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_ARGCHK(fname != NULL);
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_ARGCHK(dst != NULL);
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_ARGCHK(outlen != NULL);
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if ((errno = hash_is_valid(hash)) != CRYPT_OK) {
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return errno;
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}
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in = fopen(fname, "rb");
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if (in == NULL) {
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return CRYPT_INVALID_ARG;
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}
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if ((errno = hash_filehandle(hash, in, dst, outlen)) != CRYPT_OK) {
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fclose(in);
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return errno;
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}
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fclose(in);
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return CRYPT_OK;
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#endif
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}
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