50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#if HAVE_GCRYPT
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#include "gcrypt-util.h"
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#include "hexdecoct.h"
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void initialize_libgcrypt(bool secmem) {
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if (gcry_control(GCRYCTL_INITIALIZATION_FINISHED_P))
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return;
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assert_se(gcry_check_version("1.4.5"));
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/* Turn off "secmem". Clients which wish to make use of this
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* feature should initialize the library manually */
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if (!secmem)
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gcry_control(GCRYCTL_DISABLE_SECMEM);
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gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
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}
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int string_hashsum(const char *s, size_t len, int md_algorithm, char **out) {
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_cleanup_(gcry_md_closep) gcry_md_hd_t md = NULL;
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size_t hash_size;
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void *hash;
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char *enc;
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initialize_libgcrypt(false);
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hash_size = gcry_md_get_algo_dlen(md_algorithm);
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assert(hash_size > 0);
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gcry_md_open(&md, md_algorithm, 0);
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if (!md)
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return -EIO;
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gcry_md_write(md, s, len);
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hash = gcry_md_read(md, 0);
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if (!hash)
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return -EIO;
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enc = hexmem(hash, hash_size);
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if (!enc)
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return -ENOMEM;
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*out = enc;
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return 0;
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}
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#endif
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