47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
#include "internal.h"
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#include "ccan/ccan/str/hex/hex.h"
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int wally_hex_from_bytes(const unsigned char *bytes_in, size_t len_in,
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char **output)
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{
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if (output)
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*output = NULL;
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if (!bytes_in || !output)
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return WALLY_EINVAL;
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*output = wally_malloc(hex_str_size(len_in));
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if (!*output)
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return WALLY_ENOMEM;
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/* Note we ignore the return value as this call cannot fail */
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hex_encode(bytes_in, len_in, *output, hex_str_size(len_in));
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return WALLY_OK;
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}
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int wally_hex_to_bytes(const char *hex,
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unsigned char *bytes_out, size_t len, size_t *written)
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{
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size_t len_in = hex ? strlen(hex) : 0;
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if (written)
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*written = 0;
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if (!hex || !bytes_out || !len || len_in & 0x1)
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return WALLY_EINVAL;
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if (len < len_in / 2) {
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*written = len_in / 2;
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return WALLY_OK; /* Not enough room in bytes_out, or empty string */
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}
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len = len_in / 2; /* hex_decode expects exact length */
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if (!hex_decode(hex, len_in, bytes_out, len))
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return WALLY_EINVAL;
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if (written)
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*written = len;
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return WALLY_OK;
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}
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