#include "postgres.h"
#include "common/cryptohash.h"
#include "common/md5.h"
#include "common/sha2.h"
#include "utils/builtins.h"
#include "varatt.h"

Include dependency graph for cryptohashfuncs.c:

Macros
#define	MD5_HASH_LEN 32

Functions
Datum	md5_text (PG_FUNCTION_ARGS)

Datum	md5_bytea (PG_FUNCTION_ARGS)

static bytea *	cryptohash_internal (pg_cryptohash_type type, bytea *input)

Datum	sha224_bytea (PG_FUNCTION_ARGS)

Datum	sha256_bytea (PG_FUNCTION_ARGS)

Datum	sha384_bytea (PG_FUNCTION_ARGS)

Datum	sha512_bytea (PG_FUNCTION_ARGS)

Macro Definition Documentation

◆ MD5_HASH_LEN

#define MD5_HASH_LEN 32

Definition at line 28 of file cryptohashfuncs.c.

Function Documentation

◆ cryptohash_internal()

static bytea * cryptohash_internal	(	pg_cryptohash_type	type,
		bytea *	input
	)

inlinestatic

Definition at line 80 of file cryptohashfuncs.c.

{
    const uint8 *data;
    const char *typestr = NULL;
    int         digest_len = 0;
    size_t      len;
    pg_cryptohash_ctx *ctx;
    bytea      *result;
 
    switch (type)
    {
        case PG_SHA224:
            typestr = "SHA224";
            digest_len = PG_SHA224_DIGEST_LENGTH;
            break;
        case PG_SHA256:
            typestr = "SHA256";
            digest_len = PG_SHA256_DIGEST_LENGTH;
            break;
        case PG_SHA384:
            typestr = "SHA384";
            digest_len = PG_SHA384_DIGEST_LENGTH;
            break;
        case PG_SHA512:
            typestr = "SHA512";
            digest_len = PG_SHA512_DIGEST_LENGTH;
            break;
        case PG_MD5:
        case PG_SHA1:
            elog(ERROR, "unsupported cryptohash type %d", type);
            break;
    }
 
    result = palloc0(digest_len + VARHDRSZ);
    len = VARSIZE_ANY_EXHDR(input);
    data = (unsigned char *) VARDATA_ANY(input);
 
    ctx = pg_cryptohash_create(type);
    if (pg_cryptohash_init(ctx) < 0)
        elog(ERROR, "could not initialize %s context: %s", typestr,
             pg_cryptohash_error(ctx));
    if (pg_cryptohash_update(ctx, data, len) < 0)
        elog(ERROR, "could not update %s context: %s", typestr,
             pg_cryptohash_error(ctx));
    if (pg_cryptohash_final(ctx, (unsigned char *) VARDATA(result),
                            digest_len) < 0)
        elog(ERROR, "could not finalize %s context: %s", typestr,
             pg_cryptohash_error(ctx));
    pg_cryptohash_free(ctx);
 
    SET_VARSIZE(result, digest_len + VARHDRSZ);
 
    return result;
}

References data, elog, ERROR, input, len, palloc0(), pg_cryptohash_create(), pg_cryptohash_error(), pg_cryptohash_final(), pg_cryptohash_free(), pg_cryptohash_init(), pg_cryptohash_update(), PG_MD5, PG_SHA1, PG_SHA224, PG_SHA224_DIGEST_LENGTH, PG_SHA256, PG_SHA256_DIGEST_LENGTH, PG_SHA384, PG_SHA384_DIGEST_LENGTH, PG_SHA512, PG_SHA512_DIGEST_LENGTH, SET_VARSIZE, type, VARDATA, VARDATA_ANY, VARHDRSZ, and VARSIZE_ANY_EXHDR.

Referenced by sha224_bytea(), sha256_bytea(), sha384_bytea(), and sha512_bytea().

◆ md5_bytea()

Datum md5_bytea ( PG_FUNCTION_ARGS )

Definition at line 59 of file cryptohashfuncs.c.

{
    bytea      *in = PG_GETARG_BYTEA_PP(0);
    size_t      len;
    char        hexsum[MD5_HASH_LEN + 1];
    const char *errstr = NULL;
 
    len = VARSIZE_ANY_EXHDR(in);
    if (pg_md5_hash(VARDATA_ANY(in), len, hexsum, &errstr) == false)
        ereport(ERROR,
                (errcode(ERRCODE_INTERNAL_ERROR),
                 errmsg("could not compute %s hash: %s", "MD5",
                        errstr)));
 
    PG_RETURN_TEXT_P(cstring_to_text(hexsum));
}

References cstring_to_text(), ereport, errcode(), errmsg(), ERROR, len, MD5_HASH_LEN, PG_GETARG_BYTEA_PP, pg_md5_hash(), PG_RETURN_TEXT_P, VARDATA_ANY, and VARSIZE_ANY_EXHDR.

◆ md5_text()

Datum md5_text ( PG_FUNCTION_ARGS )

Definition at line 34 of file cryptohashfuncs.c.

{
    text       *in_text = PG_GETARG_TEXT_PP(0);
    size_t      len;
    char        hexsum[MD5_HASH_LEN + 1];
    const char *errstr = NULL;
 
    /* Calculate the length of the buffer using varlena metadata */
    len = VARSIZE_ANY_EXHDR(in_text);
 
    /* get the hash result */
    if (pg_md5_hash(VARDATA_ANY(in_text), len, hexsum, &errstr) == false)
        ereport(ERROR,
                (errcode(ERRCODE_INTERNAL_ERROR),
                 errmsg("could not compute %s hash: %s", "MD5",
                        errstr)));
 
    /* convert to text and return it */
    PG_RETURN_TEXT_P(cstring_to_text(hexsum));
}

References cstring_to_text(), ereport, errcode(), errmsg(), ERROR, len, MD5_HASH_LEN, PG_GETARG_TEXT_PP, pg_md5_hash(), PG_RETURN_TEXT_P, VARDATA_ANY, and VARSIZE_ANY_EXHDR.

◆ sha224_bytea()

Datum sha224_bytea ( PG_FUNCTION_ARGS )

Definition at line 140 of file cryptohashfuncs.c.

{
    bytea      *result = cryptohash_internal(PG_SHA224, PG_GETARG_BYTEA_PP(0));
 
    PG_RETURN_BYTEA_P(result);
}

References cryptohash_internal(), PG_GETARG_BYTEA_PP, PG_RETURN_BYTEA_P, and PG_SHA224.

◆ sha256_bytea()

Datum sha256_bytea ( PG_FUNCTION_ARGS )

Definition at line 148 of file cryptohashfuncs.c.

{
    bytea      *result = cryptohash_internal(PG_SHA256, PG_GETARG_BYTEA_PP(0));
 
    PG_RETURN_BYTEA_P(result);
}

References cryptohash_internal(), PG_GETARG_BYTEA_PP, PG_RETURN_BYTEA_P, and PG_SHA256.

◆ sha384_bytea()

Datum sha384_bytea ( PG_FUNCTION_ARGS )

Definition at line 156 of file cryptohashfuncs.c.

{
    bytea      *result = cryptohash_internal(PG_SHA384, PG_GETARG_BYTEA_PP(0));
 
    PG_RETURN_BYTEA_P(result);
}

References cryptohash_internal(), PG_GETARG_BYTEA_PP, PG_RETURN_BYTEA_P, and PG_SHA384.

◆ sha512_bytea()

Datum sha512_bytea ( PG_FUNCTION_ARGS )

Definition at line 164 of file cryptohashfuncs.c.

{
    bytea      *result = cryptohash_internal(PG_SHA512, PG_GETARG_BYTEA_PP(0));
 
    PG_RETURN_BYTEA_P(result);
}

References cryptohash_internal(), PG_GETARG_BYTEA_PP, PG_RETURN_BYTEA_P, and PG_SHA512.

Macros

Functions